1 /*- 2 * Copyright (c) 2011 Chelsio Communications, Inc. 3 * All rights reserved. 4 * Written by: Navdeep Parhar <np@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include "opt_inet.h" 32 33 #include <sys/types.h> 34 #include <sys/mbuf.h> 35 #include <sys/socket.h> 36 #include <sys/kernel.h> 37 #include <sys/malloc.h> 38 #include <sys/queue.h> 39 #include <sys/taskqueue.h> 40 #include <sys/sysctl.h> 41 #include <sys/smp.h> 42 #include <net/bpf.h> 43 #include <net/ethernet.h> 44 #include <net/if.h> 45 #include <net/if_vlan_var.h> 46 #include <netinet/in.h> 47 #include <netinet/ip.h> 48 #include <netinet/tcp.h> 49 50 #include "common/common.h" 51 #include "common/t4_regs.h" 52 #include "common/t4_regs_values.h" 53 #include "common/t4_msg.h" 54 #include "t4_l2t.h" 55 56 struct fl_buf_info { 57 int size; 58 int type; 59 uma_zone_t zone; 60 }; 61 62 /* Filled up by t4_sge_modload */ 63 static struct fl_buf_info fl_buf_info[FL_BUF_SIZES]; 64 65 #define FL_BUF_SIZE(x) (fl_buf_info[x].size) 66 #define FL_BUF_TYPE(x) (fl_buf_info[x].type) 67 #define FL_BUF_ZONE(x) (fl_buf_info[x].zone) 68 69 enum { 70 FL_PKTSHIFT = 2 71 }; 72 73 #define FL_ALIGN min(CACHE_LINE_SIZE, 32) 74 #if CACHE_LINE_SIZE > 64 75 #define SPG_LEN 128 76 #else 77 #define SPG_LEN 64 78 #endif 79 80 /* Used to track coalesced tx work request */ 81 struct txpkts { 82 uint64_t *flitp; /* ptr to flit where next pkt should start */ 83 uint8_t npkt; /* # of packets in this work request */ 84 uint8_t nflits; /* # of flits used by this work request */ 85 uint16_t plen; /* total payload (sum of all packets) */ 86 }; 87 88 /* A packet's SGL. This + m_pkthdr has all info needed for tx */ 89 struct sgl { 90 int nsegs; /* # of segments in the SGL, 0 means imm. tx */ 91 int nflits; /* # of flits needed for the SGL */ 92 bus_dma_segment_t seg[TX_SGL_SEGS]; 93 }; 94 95 static int service_iq(struct sge_iq *, int); 96 static struct mbuf *get_fl_payload(struct adapter *, struct sge_fl *, uint32_t, 97 int *); 98 static int t4_eth_rx(struct sge_iq *, const struct rss_header *, struct mbuf *); 99 static inline void init_iq(struct sge_iq *, struct adapter *, int, int, int, 100 int, char *); 101 static inline void init_fl(struct sge_fl *, int, int, char *); 102 static inline void init_eq(struct sge_eq *, int, int, uint8_t, uint16_t, 103 char *); 104 static int alloc_ring(struct adapter *, size_t, bus_dma_tag_t *, bus_dmamap_t *, 105 bus_addr_t *, void **); 106 static int free_ring(struct adapter *, bus_dma_tag_t, bus_dmamap_t, bus_addr_t, 107 void *); 108 static int alloc_iq_fl(struct port_info *, struct sge_iq *, struct sge_fl *, 109 int, int); 110 static int free_iq_fl(struct port_info *, struct sge_iq *, struct sge_fl *); 111 static int alloc_fwq(struct adapter *); 112 static int free_fwq(struct adapter *); 113 static int alloc_mgmtq(struct adapter *); 114 static int free_mgmtq(struct adapter *); 115 static int alloc_rxq(struct port_info *, struct sge_rxq *, int, int, 116 struct sysctl_oid *); 117 static int free_rxq(struct port_info *, struct sge_rxq *); 118 #ifndef TCP_OFFLOAD_DISABLE 119 static int alloc_ofld_rxq(struct port_info *, struct sge_ofld_rxq *, int, int, 120 struct sysctl_oid *); 121 static int free_ofld_rxq(struct port_info *, struct sge_ofld_rxq *); 122 #endif 123 static int ctrl_eq_alloc(struct adapter *, struct sge_eq *); 124 static int eth_eq_alloc(struct adapter *, struct port_info *, struct sge_eq *); 125 #ifndef TCP_OFFLOAD_DISABLE 126 static int ofld_eq_alloc(struct adapter *, struct port_info *, struct sge_eq *); 127 #endif 128 static int alloc_eq(struct adapter *, struct port_info *, struct sge_eq *); 129 static int free_eq(struct adapter *, struct sge_eq *); 130 static int alloc_wrq(struct adapter *, struct port_info *, struct sge_wrq *, 131 struct sysctl_oid *); 132 static int free_wrq(struct adapter *, struct sge_wrq *); 133 static int alloc_txq(struct port_info *, struct sge_txq *, int, 134 struct sysctl_oid *); 135 static int free_txq(struct port_info *, struct sge_txq *); 136 static void oneseg_dma_callback(void *, bus_dma_segment_t *, int, int); 137 static inline bool is_new_response(const struct sge_iq *, struct rsp_ctrl **); 138 static inline void iq_next(struct sge_iq *); 139 static inline void ring_fl_db(struct adapter *, struct sge_fl *); 140 static int refill_fl(struct adapter *, struct sge_fl *, int); 141 static void refill_sfl(void *); 142 static int alloc_fl_sdesc(struct sge_fl *); 143 static void free_fl_sdesc(struct sge_fl *); 144 static void set_fl_tag_idx(struct sge_fl *, int); 145 static void add_fl_to_sfl(struct adapter *, struct sge_fl *); 146 147 static int get_pkt_sgl(struct sge_txq *, struct mbuf **, struct sgl *, int); 148 static int free_pkt_sgl(struct sge_txq *, struct sgl *); 149 static int write_txpkt_wr(struct port_info *, struct sge_txq *, struct mbuf *, 150 struct sgl *); 151 static int add_to_txpkts(struct port_info *, struct sge_txq *, struct txpkts *, 152 struct mbuf *, struct sgl *); 153 static void write_txpkts_wr(struct sge_txq *, struct txpkts *); 154 static inline void write_ulp_cpl_sgl(struct port_info *, struct sge_txq *, 155 struct txpkts *, struct mbuf *, struct sgl *); 156 static int write_sgl_to_txd(struct sge_eq *, struct sgl *, caddr_t *); 157 static inline void copy_to_txd(struct sge_eq *, caddr_t, caddr_t *, int); 158 static inline void ring_eq_db(struct adapter *, struct sge_eq *); 159 static inline int reclaimable(struct sge_eq *); 160 static int reclaim_tx_descs(struct sge_txq *, int, int); 161 static void write_eqflush_wr(struct sge_eq *); 162 static __be64 get_flit(bus_dma_segment_t *, int, int); 163 static int handle_sge_egr_update(struct sge_iq *, const struct rss_header *, 164 struct mbuf *); 165 static int handle_fw_rpl(struct sge_iq *, const struct rss_header *, 166 struct mbuf *); 167 168 static int sysctl_uint16(SYSCTL_HANDLER_ARGS); 169 170 /* 171 * Called on MOD_LOAD and fills up fl_buf_info[]. 172 */ 173 void 174 t4_sge_modload(void) 175 { 176 int i; 177 int bufsize[FL_BUF_SIZES] = { 178 MCLBYTES, 179 #if MJUMPAGESIZE != MCLBYTES 180 MJUMPAGESIZE, 181 #endif 182 MJUM9BYTES, 183 MJUM16BYTES 184 }; 185 186 for (i = 0; i < FL_BUF_SIZES; i++) { 187 FL_BUF_SIZE(i) = bufsize[i]; 188 FL_BUF_TYPE(i) = m_gettype(bufsize[i]); 189 FL_BUF_ZONE(i) = m_getzone(bufsize[i]); 190 } 191 } 192 193 /** 194 * t4_sge_init - initialize SGE 195 * @sc: the adapter 196 * 197 * Performs SGE initialization needed every time after a chip reset. 198 * We do not initialize any of the queues here, instead the driver 199 * top-level must request them individually. 200 */ 201 int 202 t4_sge_init(struct adapter *sc) 203 { 204 struct sge *s = &sc->sge; 205 int i, rc = 0; 206 uint32_t ctrl_mask, ctrl_val, hpsize, v; 207 208 ctrl_mask = V_PKTSHIFT(M_PKTSHIFT) | F_RXPKTCPLMODE | 209 V_INGPADBOUNDARY(M_INGPADBOUNDARY) | 210 F_EGRSTATUSPAGESIZE; 211 ctrl_val = V_PKTSHIFT(FL_PKTSHIFT) | F_RXPKTCPLMODE | 212 V_INGPADBOUNDARY(ilog2(FL_ALIGN) - 5) | 213 V_EGRSTATUSPAGESIZE(SPG_LEN == 128); 214 215 hpsize = V_HOSTPAGESIZEPF0(PAGE_SHIFT - 10) | 216 V_HOSTPAGESIZEPF1(PAGE_SHIFT - 10) | 217 V_HOSTPAGESIZEPF2(PAGE_SHIFT - 10) | 218 V_HOSTPAGESIZEPF3(PAGE_SHIFT - 10) | 219 V_HOSTPAGESIZEPF4(PAGE_SHIFT - 10) | 220 V_HOSTPAGESIZEPF5(PAGE_SHIFT - 10) | 221 V_HOSTPAGESIZEPF6(PAGE_SHIFT - 10) | 222 V_HOSTPAGESIZEPF7(PAGE_SHIFT - 10); 223 224 if (sc->flags & MASTER_PF) { 225 int intr_timer[SGE_NTIMERS] = {1, 5, 10, 50, 100, 200}; 226 int intr_pktcount[SGE_NCOUNTERS] = {1, 8, 16, 32}; /* 63 max */ 227 228 t4_set_reg_field(sc, A_SGE_CONTROL, ctrl_mask, ctrl_val); 229 t4_write_reg(sc, A_SGE_HOST_PAGE_SIZE, hpsize); 230 for (i = 0; i < FL_BUF_SIZES; i++) { 231 t4_write_reg(sc, A_SGE_FL_BUFFER_SIZE0 + (4 * i), 232 FL_BUF_SIZE(i)); 233 } 234 235 t4_write_reg(sc, A_SGE_INGRESS_RX_THRESHOLD, 236 V_THRESHOLD_0(intr_pktcount[0]) | 237 V_THRESHOLD_1(intr_pktcount[1]) | 238 V_THRESHOLD_2(intr_pktcount[2]) | 239 V_THRESHOLD_3(intr_pktcount[3])); 240 241 t4_write_reg(sc, A_SGE_TIMER_VALUE_0_AND_1, 242 V_TIMERVALUE0(us_to_core_ticks(sc, intr_timer[0])) | 243 V_TIMERVALUE1(us_to_core_ticks(sc, intr_timer[1]))); 244 t4_write_reg(sc, A_SGE_TIMER_VALUE_2_AND_3, 245 V_TIMERVALUE2(us_to_core_ticks(sc, intr_timer[2])) | 246 V_TIMERVALUE3(us_to_core_ticks(sc, intr_timer[3]))); 247 t4_write_reg(sc, A_SGE_TIMER_VALUE_4_AND_5, 248 V_TIMERVALUE4(us_to_core_ticks(sc, intr_timer[4])) | 249 V_TIMERVALUE5(us_to_core_ticks(sc, intr_timer[5]))); 250 } 251 252 v = t4_read_reg(sc, A_SGE_CONTROL); 253 if ((v & ctrl_mask) != ctrl_val) { 254 device_printf(sc->dev, "invalid SGE_CONTROL(0x%x)\n", v); 255 rc = EINVAL; 256 } 257 258 v = t4_read_reg(sc, A_SGE_HOST_PAGE_SIZE); 259 if (v != hpsize) { 260 device_printf(sc->dev, "invalid SGE_HOST_PAGE_SIZE(0x%x)\n", v); 261 rc = EINVAL; 262 } 263 264 for (i = 0; i < FL_BUF_SIZES; i++) { 265 v = t4_read_reg(sc, A_SGE_FL_BUFFER_SIZE0 + (4 * i)); 266 if (v != FL_BUF_SIZE(i)) { 267 device_printf(sc->dev, 268 "invalid SGE_FL_BUFFER_SIZE[%d](0x%x)\n", i, v); 269 rc = EINVAL; 270 } 271 } 272 273 v = t4_read_reg(sc, A_SGE_CONM_CTRL); 274 s->fl_starve_threshold = G_EGRTHRESHOLD(v) * 2 + 1; 275 276 v = t4_read_reg(sc, A_SGE_INGRESS_RX_THRESHOLD); 277 sc->sge.counter_val[0] = G_THRESHOLD_0(v); 278 sc->sge.counter_val[1] = G_THRESHOLD_1(v); 279 sc->sge.counter_val[2] = G_THRESHOLD_2(v); 280 sc->sge.counter_val[3] = G_THRESHOLD_3(v); 281 282 v = t4_read_reg(sc, A_SGE_TIMER_VALUE_0_AND_1); 283 sc->sge.timer_val[0] = G_TIMERVALUE0(v) / core_ticks_per_usec(sc); 284 sc->sge.timer_val[1] = G_TIMERVALUE1(v) / core_ticks_per_usec(sc); 285 v = t4_read_reg(sc, A_SGE_TIMER_VALUE_2_AND_3); 286 sc->sge.timer_val[2] = G_TIMERVALUE2(v) / core_ticks_per_usec(sc); 287 sc->sge.timer_val[3] = G_TIMERVALUE3(v) / core_ticks_per_usec(sc); 288 v = t4_read_reg(sc, A_SGE_TIMER_VALUE_4_AND_5); 289 sc->sge.timer_val[4] = G_TIMERVALUE4(v) / core_ticks_per_usec(sc); 290 sc->sge.timer_val[5] = G_TIMERVALUE5(v) / core_ticks_per_usec(sc); 291 292 t4_register_cpl_handler(sc, CPL_FW4_MSG, handle_fw_rpl); 293 t4_register_cpl_handler(sc, CPL_FW6_MSG, handle_fw_rpl); 294 t4_register_cpl_handler(sc, CPL_SGE_EGR_UPDATE, handle_sge_egr_update); 295 t4_register_cpl_handler(sc, CPL_RX_PKT, t4_eth_rx); 296 297 return (rc); 298 } 299 300 int 301 t4_create_dma_tag(struct adapter *sc) 302 { 303 int rc; 304 305 rc = bus_dma_tag_create(bus_get_dma_tag(sc->dev), 1, 0, 306 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, BUS_SPACE_MAXSIZE, 307 BUS_SPACE_UNRESTRICTED, BUS_SPACE_MAXSIZE, BUS_DMA_ALLOCNOW, NULL, 308 NULL, &sc->dmat); 309 if (rc != 0) { 310 device_printf(sc->dev, 311 "failed to create main DMA tag: %d\n", rc); 312 } 313 314 return (rc); 315 } 316 317 int 318 t4_destroy_dma_tag(struct adapter *sc) 319 { 320 if (sc->dmat) 321 bus_dma_tag_destroy(sc->dmat); 322 323 return (0); 324 } 325 326 /* 327 * Allocate and initialize the firmware event queue and the management queue. 328 * 329 * Returns errno on failure. Resources allocated up to that point may still be 330 * allocated. Caller is responsible for cleanup in case this function fails. 331 */ 332 int 333 t4_setup_adapter_queues(struct adapter *sc) 334 { 335 int rc; 336 337 ADAPTER_LOCK_ASSERT_NOTOWNED(sc); 338 339 sysctl_ctx_init(&sc->ctx); 340 sc->flags |= ADAP_SYSCTL_CTX; 341 342 /* 343 * Firmware event queue 344 */ 345 rc = alloc_fwq(sc); 346 if (rc != 0) { 347 device_printf(sc->dev, 348 "failed to create firmware event queue: %d\n", rc); 349 return (rc); 350 } 351 352 /* 353 * Management queue. This is just a control queue that uses the fwq as 354 * its associated iq. 355 */ 356 rc = alloc_mgmtq(sc); 357 if (rc != 0) { 358 device_printf(sc->dev, 359 "failed to create management queue: %d\n", rc); 360 return (rc); 361 } 362 363 return (rc); 364 } 365 366 /* 367 * Idempotent 368 */ 369 int 370 t4_teardown_adapter_queues(struct adapter *sc) 371 { 372 373 ADAPTER_LOCK_ASSERT_NOTOWNED(sc); 374 375 /* Do this before freeing the queue */ 376 if (sc->flags & ADAP_SYSCTL_CTX) { 377 sysctl_ctx_free(&sc->ctx); 378 sc->flags &= ~ADAP_SYSCTL_CTX; 379 } 380 381 free_mgmtq(sc); 382 free_fwq(sc); 383 384 return (0); 385 } 386 387 static inline int 388 first_vector(struct port_info *pi) 389 { 390 struct adapter *sc = pi->adapter; 391 int rc = T4_EXTRA_INTR, i; 392 393 if (sc->intr_count == 1) 394 return (0); 395 396 for_each_port(sc, i) { 397 if (i == pi->port_id) 398 break; 399 400 #ifndef TCP_OFFLOAD_DISABLE 401 if (sc->flags & INTR_DIRECT) 402 rc += pi->nrxq + pi->nofldrxq; 403 else 404 rc += max(pi->nrxq, pi->nofldrxq); 405 #else 406 /* 407 * Not compiled with offload support and intr_count > 1. Only 408 * NIC queues exist and they'd better be taking direct 409 * interrupts. 410 */ 411 KASSERT(sc->flags & INTR_DIRECT, 412 ("%s: intr_count %d, !INTR_DIRECT", __func__, 413 sc->intr_count)); 414 415 rc += pi->nrxq; 416 #endif 417 } 418 419 return (rc); 420 } 421 422 /* 423 * Given an arbitrary "index," come up with an iq that can be used by other 424 * queues (of this port) for interrupt forwarding, SGE egress updates, etc. 425 * The iq returned is guaranteed to be something that takes direct interrupts. 426 */ 427 static struct sge_iq * 428 port_intr_iq(struct port_info *pi, int idx) 429 { 430 struct adapter *sc = pi->adapter; 431 struct sge *s = &sc->sge; 432 struct sge_iq *iq = NULL; 433 434 if (sc->intr_count == 1) 435 return (&sc->sge.fwq); 436 437 #ifndef TCP_OFFLOAD_DISABLE 438 if (sc->flags & INTR_DIRECT) { 439 idx %= pi->nrxq + pi->nofldrxq; 440 441 if (idx >= pi->nrxq) { 442 idx -= pi->nrxq; 443 iq = &s->ofld_rxq[pi->first_ofld_rxq + idx].iq; 444 } else 445 iq = &s->rxq[pi->first_rxq + idx].iq; 446 447 } else { 448 idx %= max(pi->nrxq, pi->nofldrxq); 449 450 if (pi->nrxq >= pi->nofldrxq) 451 iq = &s->rxq[pi->first_rxq + idx].iq; 452 else 453 iq = &s->ofld_rxq[pi->first_ofld_rxq + idx].iq; 454 } 455 #else 456 /* 457 * Not compiled with offload support and intr_count > 1. Only NIC 458 * queues exist and they'd better be taking direct interrupts. 459 */ 460 KASSERT(sc->flags & INTR_DIRECT, 461 ("%s: intr_count %d, !INTR_DIRECT", __func__, sc->intr_count)); 462 463 idx %= pi->nrxq; 464 iq = &s->rxq[pi->first_rxq + idx].iq; 465 #endif 466 467 KASSERT(iq->flags & IQ_INTR, ("%s: EDOOFUS", __func__)); 468 return (iq); 469 } 470 471 int 472 t4_setup_port_queues(struct port_info *pi) 473 { 474 int rc = 0, i, j, intr_idx, iqid; 475 struct sge_rxq *rxq; 476 struct sge_txq *txq; 477 struct sge_wrq *ctrlq; 478 #ifndef TCP_OFFLOAD_DISABLE 479 struct sge_ofld_rxq *ofld_rxq; 480 struct sge_wrq *ofld_txq; 481 #endif 482 char name[16]; 483 struct adapter *sc = pi->adapter; 484 struct sysctl_oid *oid = device_get_sysctl_tree(pi->dev), *oid2 = NULL; 485 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 486 487 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "rxq", CTLFLAG_RD, 488 NULL, "rx queues"); 489 490 #ifndef TCP_OFFLOAD_DISABLE 491 if (is_offload(sc)) { 492 oid2 = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "ofld_rxq", 493 CTLFLAG_RD, NULL, 494 "rx queues for offloaded TCP connections"); 495 } 496 #endif 497 498 /* Interrupt vector to start from (when using multiple vectors) */ 499 intr_idx = first_vector(pi); 500 501 /* 502 * First pass over all rx queues (NIC and TOE): 503 * a) initialize iq and fl 504 * b) allocate queue iff it will take direct interrupts. 505 */ 506 for_each_rxq(pi, i, rxq) { 507 508 snprintf(name, sizeof(name), "%s rxq%d-iq", 509 device_get_nameunit(pi->dev), i); 510 init_iq(&rxq->iq, sc, pi->tmr_idx, pi->pktc_idx, pi->qsize_rxq, 511 RX_IQ_ESIZE, name); 512 513 snprintf(name, sizeof(name), "%s rxq%d-fl", 514 device_get_nameunit(pi->dev), i); 515 init_fl(&rxq->fl, pi->qsize_rxq / 8, pi->ifp->if_mtu, name); 516 517 if (sc->flags & INTR_DIRECT 518 #ifndef TCP_OFFLOAD_DISABLE 519 || (sc->intr_count > 1 && pi->nrxq >= pi->nofldrxq) 520 #endif 521 ) { 522 rxq->iq.flags |= IQ_INTR; 523 rc = alloc_rxq(pi, rxq, intr_idx, i, oid); 524 if (rc != 0) 525 goto done; 526 intr_idx++; 527 } 528 } 529 530 #ifndef TCP_OFFLOAD_DISABLE 531 for_each_ofld_rxq(pi, i, ofld_rxq) { 532 533 snprintf(name, sizeof(name), "%s ofld_rxq%d-iq", 534 device_get_nameunit(pi->dev), i); 535 init_iq(&ofld_rxq->iq, sc, pi->tmr_idx, pi->pktc_idx, 536 pi->qsize_rxq, RX_IQ_ESIZE, name); 537 538 snprintf(name, sizeof(name), "%s ofld_rxq%d-fl", 539 device_get_nameunit(pi->dev), i); 540 init_fl(&ofld_rxq->fl, pi->qsize_rxq / 8, MJUM16BYTES, name); 541 542 if (sc->flags & INTR_DIRECT || 543 (sc->intr_count > 1 && pi->nofldrxq > pi->nrxq)) { 544 ofld_rxq->iq.flags |= IQ_INTR; 545 rc = alloc_ofld_rxq(pi, ofld_rxq, intr_idx, i, oid2); 546 if (rc != 0) 547 goto done; 548 intr_idx++; 549 } 550 } 551 #endif 552 553 /* 554 * Second pass over all rx queues (NIC and TOE). The queues forwarding 555 * their interrupts are allocated now. 556 */ 557 j = 0; 558 for_each_rxq(pi, i, rxq) { 559 if (rxq->iq.flags & IQ_INTR) 560 continue; 561 562 intr_idx = port_intr_iq(pi, j)->abs_id; 563 564 rc = alloc_rxq(pi, rxq, intr_idx, i, oid); 565 if (rc != 0) 566 goto done; 567 j++; 568 } 569 570 #ifndef TCP_OFFLOAD_DISABLE 571 for_each_ofld_rxq(pi, i, ofld_rxq) { 572 if (ofld_rxq->iq.flags & IQ_INTR) 573 continue; 574 575 intr_idx = port_intr_iq(pi, j)->abs_id; 576 577 rc = alloc_ofld_rxq(pi, ofld_rxq, intr_idx, i, oid2); 578 if (rc != 0) 579 goto done; 580 j++; 581 } 582 #endif 583 584 /* 585 * Now the tx queues. Only one pass needed. 586 */ 587 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "txq", CTLFLAG_RD, 588 NULL, "tx queues"); 589 j = 0; 590 for_each_txq(pi, i, txq) { 591 uint16_t iqid; 592 593 iqid = port_intr_iq(pi, j)->cntxt_id; 594 595 snprintf(name, sizeof(name), "%s txq%d", 596 device_get_nameunit(pi->dev), i); 597 init_eq(&txq->eq, EQ_ETH, pi->qsize_txq, pi->tx_chan, iqid, 598 name); 599 600 rc = alloc_txq(pi, txq, i, oid); 601 if (rc != 0) 602 goto done; 603 j++; 604 } 605 606 #ifndef TCP_OFFLOAD_DISABLE 607 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "ofld_txq", 608 CTLFLAG_RD, NULL, "tx queues for offloaded TCP connections"); 609 for_each_ofld_txq(pi, i, ofld_txq) { 610 uint16_t iqid; 611 612 iqid = port_intr_iq(pi, j)->cntxt_id; 613 614 snprintf(name, sizeof(name), "%s ofld_txq%d", 615 device_get_nameunit(pi->dev), i); 616 init_eq(&ofld_txq->eq, EQ_OFLD, pi->qsize_txq, pi->tx_chan, 617 iqid, name); 618 619 snprintf(name, sizeof(name), "%d", i); 620 oid2 = SYSCTL_ADD_NODE(&pi->ctx, SYSCTL_CHILDREN(oid), OID_AUTO, 621 name, CTLFLAG_RD, NULL, "offload tx queue"); 622 623 rc = alloc_wrq(sc, pi, ofld_txq, oid2); 624 if (rc != 0) 625 goto done; 626 j++; 627 } 628 #endif 629 630 /* 631 * Finally, the control queue. 632 */ 633 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "ctrlq", CTLFLAG_RD, 634 NULL, "ctrl queue"); 635 ctrlq = &sc->sge.ctrlq[pi->port_id]; 636 iqid = port_intr_iq(pi, 0)->cntxt_id; 637 snprintf(name, sizeof(name), "%s ctrlq", device_get_nameunit(pi->dev)); 638 init_eq(&ctrlq->eq, EQ_CTRL, CTRL_EQ_QSIZE, pi->tx_chan, iqid, name); 639 rc = alloc_wrq(sc, pi, ctrlq, oid); 640 641 done: 642 if (rc) 643 t4_teardown_port_queues(pi); 644 645 return (rc); 646 } 647 648 /* 649 * Idempotent 650 */ 651 int 652 t4_teardown_port_queues(struct port_info *pi) 653 { 654 int i; 655 struct adapter *sc = pi->adapter; 656 struct sge_rxq *rxq; 657 struct sge_txq *txq; 658 #ifndef TCP_OFFLOAD_DISABLE 659 struct sge_ofld_rxq *ofld_rxq; 660 struct sge_wrq *ofld_txq; 661 #endif 662 663 /* Do this before freeing the queues */ 664 if (pi->flags & PORT_SYSCTL_CTX) { 665 sysctl_ctx_free(&pi->ctx); 666 pi->flags &= ~PORT_SYSCTL_CTX; 667 } 668 669 /* 670 * Take down all the tx queues first, as they reference the rx queues 671 * (for egress updates, etc.). 672 */ 673 674 free_wrq(sc, &sc->sge.ctrlq[pi->port_id]); 675 676 for_each_txq(pi, i, txq) { 677 free_txq(pi, txq); 678 } 679 680 #ifndef TCP_OFFLOAD_DISABLE 681 for_each_ofld_txq(pi, i, ofld_txq) { 682 free_wrq(sc, ofld_txq); 683 } 684 #endif 685 686 /* 687 * Then take down the rx queues that forward their interrupts, as they 688 * reference other rx queues. 689 */ 690 691 for_each_rxq(pi, i, rxq) { 692 if ((rxq->iq.flags & IQ_INTR) == 0) 693 free_rxq(pi, rxq); 694 } 695 696 #ifndef TCP_OFFLOAD_DISABLE 697 for_each_ofld_rxq(pi, i, ofld_rxq) { 698 if ((ofld_rxq->iq.flags & IQ_INTR) == 0) 699 free_ofld_rxq(pi, ofld_rxq); 700 } 701 #endif 702 703 /* 704 * Then take down the rx queues that take direct interrupts. 705 */ 706 707 for_each_rxq(pi, i, rxq) { 708 if (rxq->iq.flags & IQ_INTR) 709 free_rxq(pi, rxq); 710 } 711 712 #ifndef TCP_OFFLOAD_DISABLE 713 for_each_ofld_rxq(pi, i, ofld_rxq) { 714 if (ofld_rxq->iq.flags & IQ_INTR) 715 free_ofld_rxq(pi, ofld_rxq); 716 } 717 #endif 718 719 return (0); 720 } 721 722 /* 723 * Deals with errors and the firmware event queue. All data rx queues forward 724 * their interrupt to the firmware event queue. 725 */ 726 void 727 t4_intr_all(void *arg) 728 { 729 struct adapter *sc = arg; 730 struct sge_iq *fwq = &sc->sge.fwq; 731 732 t4_intr_err(arg); 733 if (atomic_cmpset_int(&fwq->state, IQS_IDLE, IQS_BUSY)) { 734 service_iq(fwq, 0); 735 atomic_cmpset_int(&fwq->state, IQS_BUSY, IQS_IDLE); 736 } 737 } 738 739 /* Deals with error interrupts */ 740 void 741 t4_intr_err(void *arg) 742 { 743 struct adapter *sc = arg; 744 745 t4_write_reg(sc, MYPF_REG(A_PCIE_PF_CLI), 0); 746 t4_slow_intr_handler(sc); 747 } 748 749 void 750 t4_intr_evt(void *arg) 751 { 752 struct sge_iq *iq = arg; 753 754 if (atomic_cmpset_int(&iq->state, IQS_IDLE, IQS_BUSY)) { 755 service_iq(iq, 0); 756 atomic_cmpset_int(&iq->state, IQS_BUSY, IQS_IDLE); 757 } 758 } 759 760 void 761 t4_intr(void *arg) 762 { 763 struct sge_iq *iq = arg; 764 765 if (atomic_cmpset_int(&iq->state, IQS_IDLE, IQS_BUSY)) { 766 service_iq(iq, 0); 767 atomic_cmpset_int(&iq->state, IQS_BUSY, IQS_IDLE); 768 } 769 } 770 771 /* 772 * Deals with anything and everything on the given ingress queue. 773 */ 774 static int 775 service_iq(struct sge_iq *iq, int budget) 776 { 777 struct sge_iq *q; 778 struct sge_rxq *rxq = (void *)iq; /* Use iff iq is part of rxq */ 779 struct sge_fl *fl = &rxq->fl; /* Use iff IQ_HAS_FL */ 780 struct adapter *sc = iq->adapter; 781 struct rsp_ctrl *ctrl; 782 const struct rss_header *rss; 783 int ndescs = 0, limit, fl_bufs_used = 0; 784 int rsp_type; 785 uint32_t lq; 786 struct mbuf *m0; 787 STAILQ_HEAD(, sge_iq) iql = STAILQ_HEAD_INITIALIZER(iql); 788 789 limit = budget ? budget : iq->qsize / 8; 790 791 KASSERT(iq->state == IQS_BUSY, ("%s: iq %p not BUSY", __func__, iq)); 792 793 /* 794 * We always come back and check the descriptor ring for new indirect 795 * interrupts and other responses after running a single handler. 796 */ 797 for (;;) { 798 while (is_new_response(iq, &ctrl)) { 799 800 rmb(); 801 802 m0 = NULL; 803 rsp_type = G_RSPD_TYPE(ctrl->u.type_gen); 804 lq = be32toh(ctrl->pldbuflen_qid); 805 rss = (const void *)iq->cdesc; 806 807 switch (rsp_type) { 808 case X_RSPD_TYPE_FLBUF: 809 810 KASSERT(iq->flags & IQ_HAS_FL, 811 ("%s: data for an iq (%p) with no freelist", 812 __func__, iq)); 813 814 m0 = get_fl_payload(sc, fl, lq, &fl_bufs_used); 815 #ifdef T4_PKT_TIMESTAMP 816 /* 817 * 60 bit timestamp for the payload is 818 * *(uint64_t *)m0->m_pktdat. Note that it is 819 * in the leading free-space in the mbuf. The 820 * kernel can clobber it during a pullup, 821 * m_copymdata, etc. You need to make sure that 822 * the mbuf reaches you unmolested if you care 823 * about the timestamp. 824 */ 825 *(uint64_t *)m0->m_pktdat = 826 be64toh(ctrl->u.last_flit) & 827 0xfffffffffffffff; 828 #endif 829 830 /* fall through */ 831 832 case X_RSPD_TYPE_CPL: 833 KASSERT(rss->opcode < NUM_CPL_CMDS, 834 ("%s: bad opcode %02x.", __func__, 835 rss->opcode)); 836 sc->cpl_handler[rss->opcode](iq, rss, m0); 837 break; 838 839 case X_RSPD_TYPE_INTR: 840 841 /* 842 * Interrupts should be forwarded only to queues 843 * that are not forwarding their interrupts. 844 * This means service_iq can recurse but only 1 845 * level deep. 846 */ 847 KASSERT(budget == 0, 848 ("%s: budget %u, rsp_type %u", __func__, 849 budget, rsp_type)); 850 851 q = sc->sge.iqmap[lq - sc->sge.iq_start]; 852 if (atomic_cmpset_int(&q->state, IQS_IDLE, 853 IQS_BUSY)) { 854 if (service_iq(q, q->qsize / 8) == 0) { 855 atomic_cmpset_int(&q->state, 856 IQS_BUSY, IQS_IDLE); 857 } else { 858 STAILQ_INSERT_TAIL(&iql, q, 859 link); 860 } 861 } 862 break; 863 864 default: 865 panic("%s: rsp_type %u", __func__, rsp_type); 866 } 867 868 iq_next(iq); 869 if (++ndescs == limit) { 870 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), 871 V_CIDXINC(ndescs) | 872 V_INGRESSQID(iq->cntxt_id) | 873 V_SEINTARM(V_QINTR_TIMER_IDX(X_TIMERREG_UPDATE_CIDX))); 874 ndescs = 0; 875 876 if (fl_bufs_used > 0) { 877 FL_LOCK(fl); 878 fl->needed += fl_bufs_used; 879 refill_fl(sc, fl, fl->cap / 8); 880 FL_UNLOCK(fl); 881 fl_bufs_used = 0; 882 } 883 884 if (budget) 885 return (EINPROGRESS); 886 } 887 } 888 889 if (STAILQ_EMPTY(&iql)) 890 break; 891 892 /* 893 * Process the head only, and send it to the back of the list if 894 * it's still not done. 895 */ 896 q = STAILQ_FIRST(&iql); 897 STAILQ_REMOVE_HEAD(&iql, link); 898 if (service_iq(q, q->qsize / 8) == 0) 899 atomic_cmpset_int(&q->state, IQS_BUSY, IQS_IDLE); 900 else 901 STAILQ_INSERT_TAIL(&iql, q, link); 902 } 903 904 #ifdef INET 905 if (iq->flags & IQ_LRO_ENABLED) { 906 struct lro_ctrl *lro = &rxq->lro; 907 struct lro_entry *l; 908 909 while (!SLIST_EMPTY(&lro->lro_active)) { 910 l = SLIST_FIRST(&lro->lro_active); 911 SLIST_REMOVE_HEAD(&lro->lro_active, next); 912 tcp_lro_flush(lro, l); 913 } 914 } 915 #endif 916 917 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), V_CIDXINC(ndescs) | 918 V_INGRESSQID((u32)iq->cntxt_id) | V_SEINTARM(iq->intr_params)); 919 920 if (iq->flags & IQ_HAS_FL) { 921 int starved; 922 923 FL_LOCK(fl); 924 fl->needed += fl_bufs_used; 925 starved = refill_fl(sc, fl, fl->cap / 4); 926 FL_UNLOCK(fl); 927 if (__predict_false(starved != 0)) 928 add_fl_to_sfl(sc, fl); 929 } 930 931 return (0); 932 } 933 934 935 #ifdef T4_PKT_TIMESTAMP 936 #define RX_COPY_THRESHOLD (MINCLSIZE - 8) 937 #else 938 #define RX_COPY_THRESHOLD MINCLSIZE 939 #endif 940 941 static struct mbuf * 942 get_fl_payload(struct adapter *sc, struct sge_fl *fl, uint32_t len_newbuf, 943 int *fl_bufs_used) 944 { 945 struct mbuf *m0, *m; 946 struct fl_sdesc *sd = &fl->sdesc[fl->cidx]; 947 unsigned int nbuf, len; 948 949 /* 950 * No assertion for the fl lock because we don't need it. This routine 951 * is called only from the rx interrupt handler and it only updates 952 * fl->cidx. (Contrast that with fl->pidx/fl->needed which could be 953 * updated in the rx interrupt handler or the starvation helper routine. 954 * That's why code that manipulates fl->pidx/fl->needed needs the fl 955 * lock but this routine does not). 956 */ 957 958 if (__predict_false((len_newbuf & F_RSPD_NEWBUF) == 0)) 959 panic("%s: cannot handle packed frames", __func__); 960 len = G_RSPD_LEN(len_newbuf); 961 962 m0 = sd->m; 963 sd->m = NULL; /* consumed */ 964 965 bus_dmamap_sync(fl->tag[sd->tag_idx], sd->map, BUS_DMASYNC_POSTREAD); 966 m_init(m0, NULL, 0, M_NOWAIT, MT_DATA, M_PKTHDR); 967 #ifdef T4_PKT_TIMESTAMP 968 /* Leave room for a timestamp */ 969 m0->m_data += 8; 970 #endif 971 972 if (len < RX_COPY_THRESHOLD) { 973 /* copy data to mbuf, buffer will be recycled */ 974 bcopy(sd->cl, mtod(m0, caddr_t), len); 975 m0->m_len = len; 976 } else { 977 bus_dmamap_unload(fl->tag[sd->tag_idx], sd->map); 978 m_cljset(m0, sd->cl, FL_BUF_TYPE(sd->tag_idx)); 979 sd->cl = NULL; /* consumed */ 980 m0->m_len = min(len, FL_BUF_SIZE(sd->tag_idx)); 981 } 982 m0->m_pkthdr.len = len; 983 984 sd++; 985 if (__predict_false(++fl->cidx == fl->cap)) { 986 sd = fl->sdesc; 987 fl->cidx = 0; 988 } 989 990 m = m0; 991 len -= m->m_len; 992 nbuf = 1; /* # of fl buffers used */ 993 994 while (len > 0) { 995 m->m_next = sd->m; 996 sd->m = NULL; /* consumed */ 997 m = m->m_next; 998 999 bus_dmamap_sync(fl->tag[sd->tag_idx], sd->map, 1000 BUS_DMASYNC_POSTREAD); 1001 1002 m_init(m, NULL, 0, M_NOWAIT, MT_DATA, 0); 1003 if (len <= MLEN) { 1004 bcopy(sd->cl, mtod(m, caddr_t), len); 1005 m->m_len = len; 1006 } else { 1007 bus_dmamap_unload(fl->tag[sd->tag_idx], 1008 sd->map); 1009 m_cljset(m, sd->cl, FL_BUF_TYPE(sd->tag_idx)); 1010 sd->cl = NULL; /* consumed */ 1011 m->m_len = min(len, FL_BUF_SIZE(sd->tag_idx)); 1012 } 1013 1014 sd++; 1015 if (__predict_false(++fl->cidx == fl->cap)) { 1016 sd = fl->sdesc; 1017 fl->cidx = 0; 1018 } 1019 1020 len -= m->m_len; 1021 nbuf++; 1022 } 1023 1024 (*fl_bufs_used) += nbuf; 1025 1026 return (m0); 1027 } 1028 1029 static int 1030 t4_eth_rx(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m0) 1031 { 1032 struct sge_rxq *rxq = (void *)iq; 1033 struct ifnet *ifp = rxq->ifp; 1034 const struct cpl_rx_pkt *cpl = (const void *)(rss + 1); 1035 #ifdef INET 1036 struct lro_ctrl *lro = &rxq->lro; 1037 #endif 1038 1039 KASSERT(m0 != NULL, ("%s: no payload with opcode %02x", __func__, 1040 rss->opcode)); 1041 1042 m0->m_pkthdr.len -= FL_PKTSHIFT; 1043 m0->m_len -= FL_PKTSHIFT; 1044 m0->m_data += FL_PKTSHIFT; 1045 1046 m0->m_pkthdr.rcvif = ifp; 1047 m0->m_flags |= M_FLOWID; 1048 m0->m_pkthdr.flowid = rss->hash_val; 1049 1050 if (cpl->csum_calc && !cpl->err_vec && 1051 ifp->if_capenable & IFCAP_RXCSUM) { 1052 m0->m_pkthdr.csum_flags |= (CSUM_IP_CHECKED | 1053 CSUM_IP_VALID | CSUM_DATA_VALID | CSUM_PSEUDO_HDR); 1054 if (cpl->ip_frag) 1055 m0->m_pkthdr.csum_data = be16toh(cpl->csum); 1056 else 1057 m0->m_pkthdr.csum_data = 0xffff; 1058 rxq->rxcsum++; 1059 } 1060 1061 if (cpl->vlan_ex) { 1062 m0->m_pkthdr.ether_vtag = be16toh(cpl->vlan); 1063 m0->m_flags |= M_VLANTAG; 1064 rxq->vlan_extraction++; 1065 } 1066 1067 #ifdef INET 1068 if (cpl->l2info & htobe32(F_RXF_LRO) && 1069 iq->flags & IQ_LRO_ENABLED && 1070 tcp_lro_rx(lro, m0, 0) == 0) { 1071 /* queued for LRO */ 1072 } else 1073 #endif 1074 ifp->if_input(ifp, m0); 1075 1076 return (0); 1077 } 1078 1079 int 1080 t4_mgmt_tx(struct adapter *sc, struct mbuf *m) 1081 { 1082 return t4_wrq_tx(sc, &sc->sge.mgmtq, m); 1083 } 1084 1085 /* 1086 * Doesn't fail. Holds on to work requests it can't send right away. 1087 */ 1088 int 1089 t4_wrq_tx_locked(struct adapter *sc, struct sge_wrq *wrq, struct mbuf *m0) 1090 { 1091 struct sge_eq *eq = &wrq->eq; 1092 int can_reclaim; 1093 caddr_t dst; 1094 struct mbuf *wr, *next; 1095 1096 TXQ_LOCK_ASSERT_OWNED(wrq); 1097 KASSERT((eq->flags & EQ_TYPEMASK) == EQ_OFLD || 1098 (eq->flags & EQ_TYPEMASK) == EQ_CTRL, 1099 ("%s: eq type %d", __func__, eq->flags & EQ_TYPEMASK)); 1100 1101 if (__predict_true(m0 != NULL)) { 1102 if (wrq->head) 1103 wrq->tail->m_nextpkt = m0; 1104 else 1105 wrq->head = m0; 1106 while (m0->m_nextpkt) 1107 m0 = m0->m_nextpkt; 1108 wrq->tail = m0; 1109 } 1110 1111 can_reclaim = reclaimable(eq); 1112 if (__predict_false(eq->flags & EQ_STALLED)) { 1113 if (can_reclaim < tx_resume_threshold(eq)) 1114 return (0); 1115 eq->flags &= ~EQ_STALLED; 1116 eq->unstalled++; 1117 } 1118 eq->cidx += can_reclaim; 1119 eq->avail += can_reclaim; 1120 if (__predict_false(eq->cidx >= eq->cap)) 1121 eq->cidx -= eq->cap; 1122 1123 for (wr = wrq->head; wr; wr = next) { 1124 int ndesc; 1125 struct mbuf *m; 1126 1127 next = wr->m_nextpkt; 1128 wr->m_nextpkt = NULL; 1129 1130 M_ASSERTPKTHDR(wr); 1131 KASSERT(wr->m_pkthdr.len > 0 && (wr->m_pkthdr.len & 0x7) == 0, 1132 ("%s: work request len %d.", __func__, wr->m_pkthdr.len)); 1133 1134 if (wr->m_pkthdr.len > SGE_MAX_WR_LEN) { 1135 #ifdef INVARIANTS 1136 panic("%s: oversized work request", __func__); 1137 #else 1138 log(LOG_ERR, "%s: %s work request too long (%d)", 1139 device_get_nameunit(sc->dev), __func__, 1140 wr->m_pkthdr.len); 1141 m_freem(wr); 1142 continue; 1143 #endif 1144 } 1145 1146 ndesc = howmany(wr->m_pkthdr.len, EQ_ESIZE); 1147 if (eq->avail < ndesc) { 1148 wr->m_nextpkt = next; 1149 wrq->no_desc++; 1150 break; 1151 } 1152 1153 dst = (void *)&eq->desc[eq->pidx]; 1154 for (m = wr; m; m = m->m_next) 1155 copy_to_txd(eq, mtod(m, caddr_t), &dst, m->m_len); 1156 1157 eq->pidx += ndesc; 1158 eq->avail -= ndesc; 1159 if (__predict_false(eq->pidx >= eq->cap)) 1160 eq->pidx -= eq->cap; 1161 1162 eq->pending += ndesc; 1163 if (eq->pending > 16) 1164 ring_eq_db(sc, eq); 1165 1166 wrq->tx_wrs++; 1167 m_freem(wr); 1168 1169 if (eq->avail < 8) { 1170 can_reclaim = reclaimable(eq); 1171 eq->cidx += can_reclaim; 1172 eq->avail += can_reclaim; 1173 if (__predict_false(eq->cidx >= eq->cap)) 1174 eq->cidx -= eq->cap; 1175 } 1176 } 1177 1178 if (eq->pending) 1179 ring_eq_db(sc, eq); 1180 1181 if (wr == NULL) 1182 wrq->head = wrq->tail = NULL; 1183 else { 1184 wrq->head = wr; 1185 1186 KASSERT(wrq->tail->m_nextpkt == NULL, 1187 ("%s: wrq->tail grew a tail of its own", __func__)); 1188 1189 eq->flags |= EQ_STALLED; 1190 if (callout_pending(&eq->tx_callout) == 0) 1191 callout_reset(&eq->tx_callout, 1, t4_tx_callout, eq); 1192 } 1193 1194 return (0); 1195 } 1196 1197 /* Per-packet header in a coalesced tx WR, before the SGL starts (in flits) */ 1198 #define TXPKTS_PKT_HDR ((\ 1199 sizeof(struct ulp_txpkt) + \ 1200 sizeof(struct ulptx_idata) + \ 1201 sizeof(struct cpl_tx_pkt_core) \ 1202 ) / 8) 1203 1204 /* Header of a coalesced tx WR, before SGL of first packet (in flits) */ 1205 #define TXPKTS_WR_HDR (\ 1206 sizeof(struct fw_eth_tx_pkts_wr) / 8 + \ 1207 TXPKTS_PKT_HDR) 1208 1209 /* Header of a tx WR, before SGL of first packet (in flits) */ 1210 #define TXPKT_WR_HDR ((\ 1211 sizeof(struct fw_eth_tx_pkt_wr) + \ 1212 sizeof(struct cpl_tx_pkt_core) \ 1213 ) / 8 ) 1214 1215 /* Header of a tx LSO WR, before SGL of first packet (in flits) */ 1216 #define TXPKT_LSO_WR_HDR ((\ 1217 sizeof(struct fw_eth_tx_pkt_wr) + \ 1218 sizeof(struct cpl_tx_pkt_lso) + \ 1219 sizeof(struct cpl_tx_pkt_core) \ 1220 ) / 8 ) 1221 1222 int 1223 t4_eth_tx(struct ifnet *ifp, struct sge_txq *txq, struct mbuf *m) 1224 { 1225 struct port_info *pi = (void *)ifp->if_softc; 1226 struct adapter *sc = pi->adapter; 1227 struct sge_eq *eq = &txq->eq; 1228 struct buf_ring *br = txq->br; 1229 struct mbuf *next; 1230 int rc, coalescing, can_reclaim; 1231 struct txpkts txpkts; 1232 struct sgl sgl; 1233 1234 TXQ_LOCK_ASSERT_OWNED(txq); 1235 KASSERT(m, ("%s: called with nothing to do.", __func__)); 1236 KASSERT((eq->flags & EQ_TYPEMASK) == EQ_ETH, 1237 ("%s: eq type %d", __func__, eq->flags & EQ_TYPEMASK)); 1238 1239 prefetch(&eq->desc[eq->pidx]); 1240 prefetch(&txq->sdesc[eq->pidx]); 1241 1242 txpkts.npkt = 0;/* indicates there's nothing in txpkts */ 1243 coalescing = 0; 1244 1245 can_reclaim = reclaimable(eq); 1246 if (__predict_false(eq->flags & EQ_STALLED)) { 1247 if (can_reclaim < tx_resume_threshold(eq)) { 1248 txq->m = m; 1249 return (0); 1250 } 1251 eq->flags &= ~EQ_STALLED; 1252 eq->unstalled++; 1253 } 1254 1255 if (__predict_false(eq->flags & EQ_DOOMED)) { 1256 m_freem(m); 1257 while ((m = buf_ring_dequeue_sc(txq->br)) != NULL) 1258 m_freem(m); 1259 return (ENETDOWN); 1260 } 1261 1262 if (eq->avail < 8 && can_reclaim) 1263 reclaim_tx_descs(txq, can_reclaim, 32); 1264 1265 for (; m; m = next ? next : drbr_dequeue(ifp, br)) { 1266 1267 if (eq->avail < 8) 1268 break; 1269 1270 next = m->m_nextpkt; 1271 m->m_nextpkt = NULL; 1272 1273 if (next || buf_ring_peek(br)) 1274 coalescing = 1; 1275 1276 rc = get_pkt_sgl(txq, &m, &sgl, coalescing); 1277 if (rc != 0) { 1278 if (rc == ENOMEM) { 1279 1280 /* Short of resources, suspend tx */ 1281 1282 m->m_nextpkt = next; 1283 break; 1284 } 1285 1286 /* 1287 * Unrecoverable error for this packet, throw it away 1288 * and move on to the next. get_pkt_sgl may already 1289 * have freed m (it will be NULL in that case and the 1290 * m_freem here is still safe). 1291 */ 1292 1293 m_freem(m); 1294 continue; 1295 } 1296 1297 if (coalescing && 1298 add_to_txpkts(pi, txq, &txpkts, m, &sgl) == 0) { 1299 1300 /* Successfully absorbed into txpkts */ 1301 1302 write_ulp_cpl_sgl(pi, txq, &txpkts, m, &sgl); 1303 goto doorbell; 1304 } 1305 1306 /* 1307 * We weren't coalescing to begin with, or current frame could 1308 * not be coalesced (add_to_txpkts flushes txpkts if a frame 1309 * given to it can't be coalesced). Either way there should be 1310 * nothing in txpkts. 1311 */ 1312 KASSERT(txpkts.npkt == 0, 1313 ("%s: txpkts not empty: %d", __func__, txpkts.npkt)); 1314 1315 /* We're sending out individual packets now */ 1316 coalescing = 0; 1317 1318 if (eq->avail < 8) 1319 reclaim_tx_descs(txq, 0, 8); 1320 rc = write_txpkt_wr(pi, txq, m, &sgl); 1321 if (rc != 0) { 1322 1323 /* Short of hardware descriptors, suspend tx */ 1324 1325 /* 1326 * This is an unlikely but expensive failure. We've 1327 * done all the hard work (DMA mappings etc.) and now we 1328 * can't send out the packet. What's worse, we have to 1329 * spend even more time freeing up everything in sgl. 1330 */ 1331 txq->no_desc++; 1332 free_pkt_sgl(txq, &sgl); 1333 1334 m->m_nextpkt = next; 1335 break; 1336 } 1337 1338 ETHER_BPF_MTAP(ifp, m); 1339 if (sgl.nsegs == 0) 1340 m_freem(m); 1341 doorbell: 1342 if (eq->pending >= 64) 1343 ring_eq_db(sc, eq); 1344 1345 can_reclaim = reclaimable(eq); 1346 if (can_reclaim >= 32) 1347 reclaim_tx_descs(txq, can_reclaim, 64); 1348 } 1349 1350 if (txpkts.npkt > 0) 1351 write_txpkts_wr(txq, &txpkts); 1352 1353 /* 1354 * m not NULL means there was an error but we haven't thrown it away. 1355 * This can happen when we're short of tx descriptors (no_desc) or maybe 1356 * even DMA maps (no_dmamap). Either way, a credit flush and reclaim 1357 * will get things going again. 1358 */ 1359 if (m && !(eq->flags & EQ_CRFLUSHED)) { 1360 struct tx_sdesc *txsd = &txq->sdesc[eq->pidx]; 1361 1362 /* 1363 * If EQ_CRFLUSHED is not set then we know we have at least one 1364 * available descriptor because any WR that reduces eq->avail to 1365 * 0 also sets EQ_CRFLUSHED. 1366 */ 1367 KASSERT(eq->avail > 0, ("%s: no space for eqflush.", __func__)); 1368 1369 txsd->desc_used = 1; 1370 txsd->credits = 0; 1371 write_eqflush_wr(eq); 1372 } 1373 txq->m = m; 1374 1375 if (eq->pending) 1376 ring_eq_db(sc, eq); 1377 1378 reclaim_tx_descs(txq, 0, 128); 1379 1380 if (eq->flags & EQ_STALLED && callout_pending(&eq->tx_callout) == 0) 1381 callout_reset(&eq->tx_callout, 1, t4_tx_callout, eq); 1382 1383 return (0); 1384 } 1385 1386 void 1387 t4_update_fl_bufsize(struct ifnet *ifp) 1388 { 1389 struct port_info *pi = ifp->if_softc; 1390 struct sge_rxq *rxq; 1391 struct sge_fl *fl; 1392 int i, bufsize; 1393 1394 /* large enough for a frame even when VLAN extraction is disabled */ 1395 bufsize = FL_PKTSHIFT + ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN + 1396 ifp->if_mtu; 1397 for_each_rxq(pi, i, rxq) { 1398 fl = &rxq->fl; 1399 1400 FL_LOCK(fl); 1401 set_fl_tag_idx(fl, bufsize); 1402 FL_UNLOCK(fl); 1403 } 1404 } 1405 1406 int 1407 can_resume_tx(struct sge_eq *eq) 1408 { 1409 return (reclaimable(eq) >= tx_resume_threshold(eq)); 1410 } 1411 1412 static inline void 1413 init_iq(struct sge_iq *iq, struct adapter *sc, int tmr_idx, int pktc_idx, 1414 int qsize, int esize, char *name) 1415 { 1416 KASSERT(tmr_idx >= 0 && tmr_idx < SGE_NTIMERS, 1417 ("%s: bad tmr_idx %d", __func__, tmr_idx)); 1418 KASSERT(pktc_idx < SGE_NCOUNTERS, /* -ve is ok, means don't use */ 1419 ("%s: bad pktc_idx %d", __func__, pktc_idx)); 1420 1421 iq->flags = 0; 1422 iq->adapter = sc; 1423 iq->intr_params = V_QINTR_TIMER_IDX(tmr_idx); 1424 iq->intr_pktc_idx = SGE_NCOUNTERS - 1; 1425 if (pktc_idx >= 0) { 1426 iq->intr_params |= F_QINTR_CNT_EN; 1427 iq->intr_pktc_idx = pktc_idx; 1428 } 1429 iq->qsize = roundup(qsize, 16); /* See FW_IQ_CMD/iqsize */ 1430 iq->esize = max(esize, 16); /* See FW_IQ_CMD/iqesize */ 1431 strlcpy(iq->lockname, name, sizeof(iq->lockname)); 1432 } 1433 1434 static inline void 1435 init_fl(struct sge_fl *fl, int qsize, int bufsize, char *name) 1436 { 1437 fl->qsize = qsize; 1438 strlcpy(fl->lockname, name, sizeof(fl->lockname)); 1439 set_fl_tag_idx(fl, bufsize); 1440 } 1441 1442 static inline void 1443 init_eq(struct sge_eq *eq, int eqtype, int qsize, uint8_t tx_chan, 1444 uint16_t iqid, char *name) 1445 { 1446 KASSERT(tx_chan < NCHAN, ("%s: bad tx channel %d", __func__, tx_chan)); 1447 KASSERT(eqtype <= EQ_TYPEMASK, ("%s: bad qtype %d", __func__, eqtype)); 1448 1449 eq->flags = eqtype & EQ_TYPEMASK; 1450 eq->tx_chan = tx_chan; 1451 eq->iqid = iqid; 1452 eq->qsize = qsize; 1453 strlcpy(eq->lockname, name, sizeof(eq->lockname)); 1454 1455 TASK_INIT(&eq->tx_task, 0, t4_tx_task, eq); 1456 callout_init(&eq->tx_callout, CALLOUT_MPSAFE); 1457 } 1458 1459 static int 1460 alloc_ring(struct adapter *sc, size_t len, bus_dma_tag_t *tag, 1461 bus_dmamap_t *map, bus_addr_t *pa, void **va) 1462 { 1463 int rc; 1464 1465 rc = bus_dma_tag_create(sc->dmat, 512, 0, BUS_SPACE_MAXADDR, 1466 BUS_SPACE_MAXADDR, NULL, NULL, len, 1, len, 0, NULL, NULL, tag); 1467 if (rc != 0) { 1468 device_printf(sc->dev, "cannot allocate DMA tag: %d\n", rc); 1469 goto done; 1470 } 1471 1472 rc = bus_dmamem_alloc(*tag, va, 1473 BUS_DMA_WAITOK | BUS_DMA_COHERENT | BUS_DMA_ZERO, map); 1474 if (rc != 0) { 1475 device_printf(sc->dev, "cannot allocate DMA memory: %d\n", rc); 1476 goto done; 1477 } 1478 1479 rc = bus_dmamap_load(*tag, *map, *va, len, oneseg_dma_callback, pa, 0); 1480 if (rc != 0) { 1481 device_printf(sc->dev, "cannot load DMA map: %d\n", rc); 1482 goto done; 1483 } 1484 done: 1485 if (rc) 1486 free_ring(sc, *tag, *map, *pa, *va); 1487 1488 return (rc); 1489 } 1490 1491 static int 1492 free_ring(struct adapter *sc, bus_dma_tag_t tag, bus_dmamap_t map, 1493 bus_addr_t pa, void *va) 1494 { 1495 if (pa) 1496 bus_dmamap_unload(tag, map); 1497 if (va) 1498 bus_dmamem_free(tag, va, map); 1499 if (tag) 1500 bus_dma_tag_destroy(tag); 1501 1502 return (0); 1503 } 1504 1505 /* 1506 * Allocates the ring for an ingress queue and an optional freelist. If the 1507 * freelist is specified it will be allocated and then associated with the 1508 * ingress queue. 1509 * 1510 * Returns errno on failure. Resources allocated up to that point may still be 1511 * allocated. Caller is responsible for cleanup in case this function fails. 1512 * 1513 * If the ingress queue will take interrupts directly (iq->flags & IQ_INTR) then 1514 * the intr_idx specifies the vector, starting from 0. Otherwise it specifies 1515 * the abs_id of the ingress queue to which its interrupts should be forwarded. 1516 */ 1517 static int 1518 alloc_iq_fl(struct port_info *pi, struct sge_iq *iq, struct sge_fl *fl, 1519 int intr_idx, int cong) 1520 { 1521 int rc, i, cntxt_id; 1522 size_t len; 1523 struct fw_iq_cmd c; 1524 struct adapter *sc = iq->adapter; 1525 __be32 v = 0; 1526 1527 len = iq->qsize * iq->esize; 1528 rc = alloc_ring(sc, len, &iq->desc_tag, &iq->desc_map, &iq->ba, 1529 (void **)&iq->desc); 1530 if (rc != 0) 1531 return (rc); 1532 1533 bzero(&c, sizeof(c)); 1534 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_IQ_CMD) | F_FW_CMD_REQUEST | 1535 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_IQ_CMD_PFN(sc->pf) | 1536 V_FW_IQ_CMD_VFN(0)); 1537 1538 c.alloc_to_len16 = htobe32(F_FW_IQ_CMD_ALLOC | F_FW_IQ_CMD_IQSTART | 1539 FW_LEN16(c)); 1540 1541 /* Special handling for firmware event queue */ 1542 if (iq == &sc->sge.fwq) 1543 v |= F_FW_IQ_CMD_IQASYNCH; 1544 1545 if (iq->flags & IQ_INTR) { 1546 KASSERT(intr_idx < sc->intr_count, 1547 ("%s: invalid direct intr_idx %d", __func__, intr_idx)); 1548 } else 1549 v |= F_FW_IQ_CMD_IQANDST; 1550 v |= V_FW_IQ_CMD_IQANDSTINDEX(intr_idx); 1551 1552 c.type_to_iqandstindex = htobe32(v | 1553 V_FW_IQ_CMD_TYPE(FW_IQ_TYPE_FL_INT_CAP) | 1554 V_FW_IQ_CMD_VIID(pi->viid) | 1555 V_FW_IQ_CMD_IQANUD(X_UPDATEDELIVERY_INTERRUPT)); 1556 c.iqdroprss_to_iqesize = htobe16(V_FW_IQ_CMD_IQPCIECH(pi->tx_chan) | 1557 F_FW_IQ_CMD_IQGTSMODE | 1558 V_FW_IQ_CMD_IQINTCNTTHRESH(iq->intr_pktc_idx) | 1559 V_FW_IQ_CMD_IQESIZE(ilog2(iq->esize) - 4)); 1560 c.iqsize = htobe16(iq->qsize); 1561 c.iqaddr = htobe64(iq->ba); 1562 if (cong >= 0) 1563 c.iqns_to_fl0congen = htobe32(F_FW_IQ_CMD_IQFLINTCONGEN); 1564 1565 if (fl) { 1566 mtx_init(&fl->fl_lock, fl->lockname, NULL, MTX_DEF); 1567 1568 for (i = 0; i < FL_BUF_SIZES; i++) { 1569 1570 /* 1571 * A freelist buffer must be 16 byte aligned as the SGE 1572 * uses the low 4 bits of the bus addr to figure out the 1573 * buffer size. 1574 */ 1575 rc = bus_dma_tag_create(sc->dmat, 16, 0, 1576 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, 1577 FL_BUF_SIZE(i), 1, FL_BUF_SIZE(i), BUS_DMA_ALLOCNOW, 1578 NULL, NULL, &fl->tag[i]); 1579 if (rc != 0) { 1580 device_printf(sc->dev, 1581 "failed to create fl DMA tag[%d]: %d\n", 1582 i, rc); 1583 return (rc); 1584 } 1585 } 1586 len = fl->qsize * RX_FL_ESIZE; 1587 rc = alloc_ring(sc, len, &fl->desc_tag, &fl->desc_map, 1588 &fl->ba, (void **)&fl->desc); 1589 if (rc) 1590 return (rc); 1591 1592 /* Allocate space for one software descriptor per buffer. */ 1593 fl->cap = (fl->qsize - SPG_LEN / RX_FL_ESIZE) * 8; 1594 FL_LOCK(fl); 1595 rc = alloc_fl_sdesc(fl); 1596 FL_UNLOCK(fl); 1597 if (rc != 0) { 1598 device_printf(sc->dev, 1599 "failed to setup fl software descriptors: %d\n", 1600 rc); 1601 return (rc); 1602 } 1603 fl->needed = fl->cap; 1604 fl->lowat = roundup(sc->sge.fl_starve_threshold, 8); 1605 1606 c.iqns_to_fl0congen |= 1607 htobe32(V_FW_IQ_CMD_FL0HOSTFCMODE(X_HOSTFCMODE_NONE) | 1608 F_FW_IQ_CMD_FL0FETCHRO | F_FW_IQ_CMD_FL0DATARO | 1609 F_FW_IQ_CMD_FL0PADEN); 1610 if (cong >= 0) { 1611 c.iqns_to_fl0congen |= 1612 htobe32(V_FW_IQ_CMD_FL0CNGCHMAP(cong) | 1613 F_FW_IQ_CMD_FL0CONGCIF | 1614 F_FW_IQ_CMD_FL0CONGEN); 1615 } 1616 c.fl0dcaen_to_fl0cidxfthresh = 1617 htobe16(V_FW_IQ_CMD_FL0FBMIN(X_FETCHBURSTMIN_64B) | 1618 V_FW_IQ_CMD_FL0FBMAX(X_FETCHBURSTMAX_512B)); 1619 c.fl0size = htobe16(fl->qsize); 1620 c.fl0addr = htobe64(fl->ba); 1621 } 1622 1623 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 1624 if (rc != 0) { 1625 device_printf(sc->dev, 1626 "failed to create ingress queue: %d\n", rc); 1627 return (rc); 1628 } 1629 1630 iq->cdesc = iq->desc; 1631 iq->cidx = 0; 1632 iq->gen = 1; 1633 iq->intr_next = iq->intr_params; 1634 iq->cntxt_id = be16toh(c.iqid); 1635 iq->abs_id = be16toh(c.physiqid); 1636 iq->flags |= IQ_ALLOCATED; 1637 1638 cntxt_id = iq->cntxt_id - sc->sge.iq_start; 1639 if (cntxt_id >= sc->sge.niq) { 1640 panic ("%s: iq->cntxt_id (%d) more than the max (%d)", __func__, 1641 cntxt_id, sc->sge.niq - 1); 1642 } 1643 sc->sge.iqmap[cntxt_id] = iq; 1644 1645 if (fl) { 1646 fl->cntxt_id = be16toh(c.fl0id); 1647 fl->pidx = fl->cidx = 0; 1648 1649 cntxt_id = fl->cntxt_id - sc->sge.eq_start; 1650 if (cntxt_id >= sc->sge.neq) { 1651 panic("%s: fl->cntxt_id (%d) more than the max (%d)", 1652 __func__, cntxt_id, sc->sge.neq - 1); 1653 } 1654 sc->sge.eqmap[cntxt_id] = (void *)fl; 1655 1656 FL_LOCK(fl); 1657 /* Enough to make sure the SGE doesn't think it's starved */ 1658 refill_fl(sc, fl, fl->lowat); 1659 FL_UNLOCK(fl); 1660 1661 iq->flags |= IQ_HAS_FL; 1662 } 1663 1664 /* Enable IQ interrupts */ 1665 atomic_store_rel_int(&iq->state, IQS_IDLE); 1666 t4_write_reg(sc, MYPF_REG(A_SGE_PF_GTS), V_SEINTARM(iq->intr_params) | 1667 V_INGRESSQID(iq->cntxt_id)); 1668 1669 return (0); 1670 } 1671 1672 static int 1673 free_iq_fl(struct port_info *pi, struct sge_iq *iq, struct sge_fl *fl) 1674 { 1675 int i, rc; 1676 struct adapter *sc = iq->adapter; 1677 device_t dev; 1678 1679 if (sc == NULL) 1680 return (0); /* nothing to do */ 1681 1682 dev = pi ? pi->dev : sc->dev; 1683 1684 if (iq->flags & IQ_ALLOCATED) { 1685 rc = -t4_iq_free(sc, sc->mbox, sc->pf, 0, 1686 FW_IQ_TYPE_FL_INT_CAP, iq->cntxt_id, 1687 fl ? fl->cntxt_id : 0xffff, 0xffff); 1688 if (rc != 0) { 1689 device_printf(dev, 1690 "failed to free queue %p: %d\n", iq, rc); 1691 return (rc); 1692 } 1693 iq->flags &= ~IQ_ALLOCATED; 1694 } 1695 1696 free_ring(sc, iq->desc_tag, iq->desc_map, iq->ba, iq->desc); 1697 1698 bzero(iq, sizeof(*iq)); 1699 1700 if (fl) { 1701 free_ring(sc, fl->desc_tag, fl->desc_map, fl->ba, 1702 fl->desc); 1703 1704 if (fl->sdesc) { 1705 FL_LOCK(fl); 1706 free_fl_sdesc(fl); 1707 FL_UNLOCK(fl); 1708 } 1709 1710 if (mtx_initialized(&fl->fl_lock)) 1711 mtx_destroy(&fl->fl_lock); 1712 1713 for (i = 0; i < FL_BUF_SIZES; i++) { 1714 if (fl->tag[i]) 1715 bus_dma_tag_destroy(fl->tag[i]); 1716 } 1717 1718 bzero(fl, sizeof(*fl)); 1719 } 1720 1721 return (0); 1722 } 1723 1724 static int 1725 alloc_fwq(struct adapter *sc) 1726 { 1727 int rc, intr_idx; 1728 struct sge_iq *fwq = &sc->sge.fwq; 1729 char name[16]; 1730 struct sysctl_oid *oid = device_get_sysctl_tree(sc->dev); 1731 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 1732 1733 snprintf(name, sizeof(name), "%s fwq", device_get_nameunit(sc->dev)); 1734 init_iq(fwq, sc, 0, 0, FW_IQ_QSIZE, FW_IQ_ESIZE, name); 1735 fwq->flags |= IQ_INTR; /* always */ 1736 intr_idx = sc->intr_count > 1 ? 1 : 0; 1737 rc = alloc_iq_fl(sc->port[0], fwq, NULL, intr_idx, -1); 1738 if (rc != 0) { 1739 device_printf(sc->dev, 1740 "failed to create firmware event queue: %d\n", rc); 1741 return (rc); 1742 } 1743 1744 oid = SYSCTL_ADD_NODE(&sc->ctx, children, OID_AUTO, "fwq", CTLFLAG_RD, 1745 NULL, "firmware event queue"); 1746 children = SYSCTL_CHILDREN(oid); 1747 1748 SYSCTL_ADD_PROC(&sc->ctx, children, OID_AUTO, "abs_id", 1749 CTLTYPE_INT | CTLFLAG_RD, &fwq->abs_id, 0, sysctl_uint16, "I", 1750 "absolute id of the queue"); 1751 SYSCTL_ADD_PROC(&sc->ctx, children, OID_AUTO, "cntxt_id", 1752 CTLTYPE_INT | CTLFLAG_RD, &fwq->cntxt_id, 0, sysctl_uint16, "I", 1753 "SGE context id of the queue"); 1754 SYSCTL_ADD_PROC(&sc->ctx, children, OID_AUTO, "cidx", 1755 CTLTYPE_INT | CTLFLAG_RD, &fwq->cidx, 0, sysctl_uint16, "I", 1756 "consumer index"); 1757 1758 return (0); 1759 } 1760 1761 static int 1762 free_fwq(struct adapter *sc) 1763 { 1764 return free_iq_fl(NULL, &sc->sge.fwq, NULL); 1765 } 1766 1767 static int 1768 alloc_mgmtq(struct adapter *sc) 1769 { 1770 int rc; 1771 struct sge_wrq *mgmtq = &sc->sge.mgmtq; 1772 char name[16]; 1773 struct sysctl_oid *oid = device_get_sysctl_tree(sc->dev); 1774 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 1775 1776 oid = SYSCTL_ADD_NODE(&sc->ctx, children, OID_AUTO, "mgmtq", CTLFLAG_RD, 1777 NULL, "management queue"); 1778 1779 snprintf(name, sizeof(name), "%s mgmtq", device_get_nameunit(sc->dev)); 1780 init_eq(&mgmtq->eq, EQ_CTRL, CTRL_EQ_QSIZE, sc->port[0]->tx_chan, 1781 sc->sge.fwq.cntxt_id, name); 1782 rc = alloc_wrq(sc, NULL, mgmtq, oid); 1783 if (rc != 0) { 1784 device_printf(sc->dev, 1785 "failed to create management queue: %d\n", rc); 1786 return (rc); 1787 } 1788 1789 return (0); 1790 } 1791 1792 static int 1793 free_mgmtq(struct adapter *sc) 1794 { 1795 return free_wrq(sc, &sc->sge.mgmtq); 1796 } 1797 1798 static int 1799 alloc_rxq(struct port_info *pi, struct sge_rxq *rxq, int intr_idx, int idx, 1800 struct sysctl_oid *oid) 1801 { 1802 int rc; 1803 struct sysctl_oid_list *children; 1804 char name[16]; 1805 1806 rc = alloc_iq_fl(pi, &rxq->iq, &rxq->fl, intr_idx, 1 << pi->tx_chan); 1807 if (rc != 0) 1808 return (rc); 1809 1810 FL_LOCK(&rxq->fl); 1811 refill_fl(pi->adapter, &rxq->fl, rxq->fl.needed / 8); 1812 FL_UNLOCK(&rxq->fl); 1813 1814 #ifdef INET 1815 rc = tcp_lro_init(&rxq->lro); 1816 if (rc != 0) 1817 return (rc); 1818 rxq->lro.ifp = pi->ifp; /* also indicates LRO init'ed */ 1819 1820 if (pi->ifp->if_capenable & IFCAP_LRO) 1821 rxq->iq.flags |= IQ_LRO_ENABLED; 1822 #endif 1823 rxq->ifp = pi->ifp; 1824 1825 children = SYSCTL_CHILDREN(oid); 1826 1827 snprintf(name, sizeof(name), "%d", idx); 1828 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, name, CTLFLAG_RD, 1829 NULL, "rx queue"); 1830 children = SYSCTL_CHILDREN(oid); 1831 1832 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "abs_id", 1833 CTLTYPE_INT | CTLFLAG_RD, &rxq->iq.abs_id, 0, sysctl_uint16, "I", 1834 "absolute id of the queue"); 1835 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cntxt_id", 1836 CTLTYPE_INT | CTLFLAG_RD, &rxq->iq.cntxt_id, 0, sysctl_uint16, "I", 1837 "SGE context id of the queue"); 1838 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cidx", 1839 CTLTYPE_INT | CTLFLAG_RD, &rxq->iq.cidx, 0, sysctl_uint16, "I", 1840 "consumer index"); 1841 #ifdef INET 1842 SYSCTL_ADD_INT(&pi->ctx, children, OID_AUTO, "lro_queued", CTLFLAG_RD, 1843 &rxq->lro.lro_queued, 0, NULL); 1844 SYSCTL_ADD_INT(&pi->ctx, children, OID_AUTO, "lro_flushed", CTLFLAG_RD, 1845 &rxq->lro.lro_flushed, 0, NULL); 1846 #endif 1847 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "rxcsum", CTLFLAG_RD, 1848 &rxq->rxcsum, "# of times hardware assisted with checksum"); 1849 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "vlan_extraction", 1850 CTLFLAG_RD, &rxq->vlan_extraction, 1851 "# of times hardware extracted 802.1Q tag"); 1852 1853 children = SYSCTL_CHILDREN(oid); 1854 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "fl", CTLFLAG_RD, 1855 NULL, "freelist"); 1856 children = SYSCTL_CHILDREN(oid); 1857 1858 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cntxt_id", 1859 CTLTYPE_INT | CTLFLAG_RD, &rxq->fl.cntxt_id, 0, sysctl_uint16, "I", 1860 "SGE context id of the queue"); 1861 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "cidx", CTLFLAG_RD, 1862 &rxq->fl.cidx, 0, "consumer index"); 1863 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "pidx", CTLFLAG_RD, 1864 &rxq->fl.pidx, 0, "producer index"); 1865 1866 return (rc); 1867 } 1868 1869 static int 1870 free_rxq(struct port_info *pi, struct sge_rxq *rxq) 1871 { 1872 int rc; 1873 1874 #ifdef INET 1875 if (rxq->lro.ifp) { 1876 tcp_lro_free(&rxq->lro); 1877 rxq->lro.ifp = NULL; 1878 } 1879 #endif 1880 1881 rc = free_iq_fl(pi, &rxq->iq, &rxq->fl); 1882 if (rc == 0) 1883 bzero(rxq, sizeof(*rxq)); 1884 1885 return (rc); 1886 } 1887 1888 #ifndef TCP_OFFLOAD_DISABLE 1889 static int 1890 alloc_ofld_rxq(struct port_info *pi, struct sge_ofld_rxq *ofld_rxq, 1891 int intr_idx, int idx, struct sysctl_oid *oid) 1892 { 1893 int rc; 1894 struct sysctl_oid_list *children; 1895 char name[16]; 1896 1897 rc = alloc_iq_fl(pi, &ofld_rxq->iq, &ofld_rxq->fl, intr_idx, 1898 1 << pi->tx_chan); 1899 if (rc != 0) 1900 return (rc); 1901 1902 children = SYSCTL_CHILDREN(oid); 1903 1904 snprintf(name, sizeof(name), "%d", idx); 1905 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, name, CTLFLAG_RD, 1906 NULL, "rx queue"); 1907 children = SYSCTL_CHILDREN(oid); 1908 1909 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "abs_id", 1910 CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->iq.abs_id, 0, sysctl_uint16, 1911 "I", "absolute id of the queue"); 1912 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cntxt_id", 1913 CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->iq.cntxt_id, 0, sysctl_uint16, 1914 "I", "SGE context id of the queue"); 1915 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cidx", 1916 CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->iq.cidx, 0, sysctl_uint16, "I", 1917 "consumer index"); 1918 1919 children = SYSCTL_CHILDREN(oid); 1920 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, "fl", CTLFLAG_RD, 1921 NULL, "freelist"); 1922 children = SYSCTL_CHILDREN(oid); 1923 1924 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cntxt_id", 1925 CTLTYPE_INT | CTLFLAG_RD, &ofld_rxq->fl.cntxt_id, 0, sysctl_uint16, 1926 "I", "SGE context id of the queue"); 1927 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "cidx", CTLFLAG_RD, 1928 &ofld_rxq->fl.cidx, 0, "consumer index"); 1929 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "pidx", CTLFLAG_RD, 1930 &ofld_rxq->fl.pidx, 0, "producer index"); 1931 1932 return (rc); 1933 } 1934 1935 static int 1936 free_ofld_rxq(struct port_info *pi, struct sge_ofld_rxq *ofld_rxq) 1937 { 1938 int rc; 1939 1940 rc = free_iq_fl(pi, &ofld_rxq->iq, &ofld_rxq->fl); 1941 if (rc == 0) 1942 bzero(ofld_rxq, sizeof(*ofld_rxq)); 1943 1944 return (rc); 1945 } 1946 #endif 1947 1948 static int 1949 ctrl_eq_alloc(struct adapter *sc, struct sge_eq *eq) 1950 { 1951 int rc, cntxt_id; 1952 struct fw_eq_ctrl_cmd c; 1953 1954 bzero(&c, sizeof(c)); 1955 1956 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_EQ_CTRL_CMD) | F_FW_CMD_REQUEST | 1957 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_CTRL_CMD_PFN(sc->pf) | 1958 V_FW_EQ_CTRL_CMD_VFN(0)); 1959 c.alloc_to_len16 = htobe32(F_FW_EQ_CTRL_CMD_ALLOC | 1960 F_FW_EQ_CTRL_CMD_EQSTART | FW_LEN16(c)); 1961 c.cmpliqid_eqid = htonl(V_FW_EQ_CTRL_CMD_CMPLIQID(eq->iqid)); /* XXX */ 1962 c.physeqid_pkd = htobe32(0); 1963 c.fetchszm_to_iqid = 1964 htobe32(V_FW_EQ_CTRL_CMD_HOSTFCMODE(X_HOSTFCMODE_STATUS_PAGE) | 1965 V_FW_EQ_CTRL_CMD_PCIECHN(eq->tx_chan) | 1966 F_FW_EQ_CTRL_CMD_FETCHRO | V_FW_EQ_CTRL_CMD_IQID(eq->iqid)); 1967 c.dcaen_to_eqsize = 1968 htobe32(V_FW_EQ_CTRL_CMD_FBMIN(X_FETCHBURSTMIN_64B) | 1969 V_FW_EQ_CTRL_CMD_FBMAX(X_FETCHBURSTMAX_512B) | 1970 V_FW_EQ_CTRL_CMD_CIDXFTHRESH(X_CIDXFLUSHTHRESH_32) | 1971 V_FW_EQ_CTRL_CMD_EQSIZE(eq->qsize)); 1972 c.eqaddr = htobe64(eq->ba); 1973 1974 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 1975 if (rc != 0) { 1976 device_printf(sc->dev, 1977 "failed to create control queue %d: %d\n", eq->tx_chan, rc); 1978 return (rc); 1979 } 1980 eq->flags |= EQ_ALLOCATED; 1981 1982 eq->cntxt_id = G_FW_EQ_CTRL_CMD_EQID(be32toh(c.cmpliqid_eqid)); 1983 cntxt_id = eq->cntxt_id - sc->sge.eq_start; 1984 if (cntxt_id >= sc->sge.neq) 1985 panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__, 1986 cntxt_id, sc->sge.neq - 1); 1987 sc->sge.eqmap[cntxt_id] = eq; 1988 1989 return (rc); 1990 } 1991 1992 static int 1993 eth_eq_alloc(struct adapter *sc, struct port_info *pi, struct sge_eq *eq) 1994 { 1995 int rc, cntxt_id; 1996 struct fw_eq_eth_cmd c; 1997 1998 bzero(&c, sizeof(c)); 1999 2000 c.op_to_vfn = htobe32(V_FW_CMD_OP(FW_EQ_ETH_CMD) | F_FW_CMD_REQUEST | 2001 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_ETH_CMD_PFN(sc->pf) | 2002 V_FW_EQ_ETH_CMD_VFN(0)); 2003 c.alloc_to_len16 = htobe32(F_FW_EQ_ETH_CMD_ALLOC | 2004 F_FW_EQ_ETH_CMD_EQSTART | FW_LEN16(c)); 2005 c.viid_pkd = htobe32(V_FW_EQ_ETH_CMD_VIID(pi->viid)); 2006 c.fetchszm_to_iqid = 2007 htobe32(V_FW_EQ_ETH_CMD_HOSTFCMODE(X_HOSTFCMODE_STATUS_PAGE) | 2008 V_FW_EQ_ETH_CMD_PCIECHN(eq->tx_chan) | F_FW_EQ_ETH_CMD_FETCHRO | 2009 V_FW_EQ_ETH_CMD_IQID(eq->iqid)); 2010 c.dcaen_to_eqsize = htobe32(V_FW_EQ_ETH_CMD_FBMIN(X_FETCHBURSTMIN_64B) | 2011 V_FW_EQ_ETH_CMD_FBMAX(X_FETCHBURSTMAX_512B) | 2012 V_FW_EQ_ETH_CMD_CIDXFTHRESH(X_CIDXFLUSHTHRESH_32) | 2013 V_FW_EQ_ETH_CMD_EQSIZE(eq->qsize)); 2014 c.eqaddr = htobe64(eq->ba); 2015 2016 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 2017 if (rc != 0) { 2018 device_printf(pi->dev, 2019 "failed to create Ethernet egress queue: %d\n", rc); 2020 return (rc); 2021 } 2022 eq->flags |= EQ_ALLOCATED; 2023 2024 eq->cntxt_id = G_FW_EQ_ETH_CMD_EQID(be32toh(c.eqid_pkd)); 2025 cntxt_id = eq->cntxt_id - sc->sge.eq_start; 2026 if (cntxt_id >= sc->sge.neq) 2027 panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__, 2028 cntxt_id, sc->sge.neq - 1); 2029 sc->sge.eqmap[cntxt_id] = eq; 2030 2031 return (rc); 2032 } 2033 2034 #ifndef TCP_OFFLOAD_DISABLE 2035 static int 2036 ofld_eq_alloc(struct adapter *sc, struct port_info *pi, struct sge_eq *eq) 2037 { 2038 int rc, cntxt_id; 2039 struct fw_eq_ofld_cmd c; 2040 2041 bzero(&c, sizeof(c)); 2042 2043 c.op_to_vfn = htonl(V_FW_CMD_OP(FW_EQ_OFLD_CMD) | F_FW_CMD_REQUEST | 2044 F_FW_CMD_WRITE | F_FW_CMD_EXEC | V_FW_EQ_OFLD_CMD_PFN(sc->pf) | 2045 V_FW_EQ_OFLD_CMD_VFN(0)); 2046 c.alloc_to_len16 = htonl(F_FW_EQ_OFLD_CMD_ALLOC | 2047 F_FW_EQ_OFLD_CMD_EQSTART | FW_LEN16(c)); 2048 c.fetchszm_to_iqid = 2049 htonl(V_FW_EQ_OFLD_CMD_HOSTFCMODE(X_HOSTFCMODE_STATUS_PAGE) | 2050 V_FW_EQ_OFLD_CMD_PCIECHN(eq->tx_chan) | 2051 F_FW_EQ_OFLD_CMD_FETCHRO | V_FW_EQ_OFLD_CMD_IQID(eq->iqid)); 2052 c.dcaen_to_eqsize = 2053 htobe32(V_FW_EQ_OFLD_CMD_FBMIN(X_FETCHBURSTMIN_64B) | 2054 V_FW_EQ_OFLD_CMD_FBMAX(X_FETCHBURSTMAX_512B) | 2055 V_FW_EQ_OFLD_CMD_CIDXFTHRESH(X_CIDXFLUSHTHRESH_32) | 2056 V_FW_EQ_OFLD_CMD_EQSIZE(eq->qsize)); 2057 c.eqaddr = htobe64(eq->ba); 2058 2059 rc = -t4_wr_mbox(sc, sc->mbox, &c, sizeof(c), &c); 2060 if (rc != 0) { 2061 device_printf(pi->dev, 2062 "failed to create egress queue for TCP offload: %d\n", rc); 2063 return (rc); 2064 } 2065 eq->flags |= EQ_ALLOCATED; 2066 2067 eq->cntxt_id = G_FW_EQ_OFLD_CMD_EQID(be32toh(c.eqid_pkd)); 2068 cntxt_id = eq->cntxt_id - sc->sge.eq_start; 2069 if (cntxt_id >= sc->sge.neq) 2070 panic("%s: eq->cntxt_id (%d) more than the max (%d)", __func__, 2071 cntxt_id, sc->sge.neq - 1); 2072 sc->sge.eqmap[cntxt_id] = eq; 2073 2074 return (rc); 2075 } 2076 #endif 2077 2078 static int 2079 alloc_eq(struct adapter *sc, struct port_info *pi, struct sge_eq *eq) 2080 { 2081 int rc; 2082 size_t len; 2083 2084 mtx_init(&eq->eq_lock, eq->lockname, NULL, MTX_DEF); 2085 2086 len = eq->qsize * EQ_ESIZE; 2087 rc = alloc_ring(sc, len, &eq->desc_tag, &eq->desc_map, 2088 &eq->ba, (void **)&eq->desc); 2089 if (rc) 2090 return (rc); 2091 2092 eq->cap = eq->qsize - SPG_LEN / EQ_ESIZE; 2093 eq->spg = (void *)&eq->desc[eq->cap]; 2094 eq->avail = eq->cap - 1; /* one less to avoid cidx = pidx */ 2095 eq->pidx = eq->cidx = 0; 2096 2097 switch (eq->flags & EQ_TYPEMASK) { 2098 case EQ_CTRL: 2099 rc = ctrl_eq_alloc(sc, eq); 2100 break; 2101 2102 case EQ_ETH: 2103 rc = eth_eq_alloc(sc, pi, eq); 2104 break; 2105 2106 #ifndef TCP_OFFLOAD_DISABLE 2107 case EQ_OFLD: 2108 rc = ofld_eq_alloc(sc, pi, eq); 2109 break; 2110 #endif 2111 2112 default: 2113 panic("%s: invalid eq type %d.", __func__, 2114 eq->flags & EQ_TYPEMASK); 2115 } 2116 if (rc != 0) { 2117 device_printf(sc->dev, 2118 "failed to allocate egress queue(%d): %d", 2119 eq->flags & EQ_TYPEMASK, rc); 2120 } 2121 2122 eq->tx_callout.c_cpu = eq->cntxt_id % mp_ncpus; 2123 2124 return (rc); 2125 } 2126 2127 static int 2128 free_eq(struct adapter *sc, struct sge_eq *eq) 2129 { 2130 int rc; 2131 2132 if (eq->flags & EQ_ALLOCATED) { 2133 switch (eq->flags & EQ_TYPEMASK) { 2134 case EQ_CTRL: 2135 rc = -t4_ctrl_eq_free(sc, sc->mbox, sc->pf, 0, 2136 eq->cntxt_id); 2137 break; 2138 2139 case EQ_ETH: 2140 rc = -t4_eth_eq_free(sc, sc->mbox, sc->pf, 0, 2141 eq->cntxt_id); 2142 break; 2143 2144 #ifndef TCP_OFFLOAD_DISABLE 2145 case EQ_OFLD: 2146 rc = -t4_ofld_eq_free(sc, sc->mbox, sc->pf, 0, 2147 eq->cntxt_id); 2148 break; 2149 #endif 2150 2151 default: 2152 panic("%s: invalid eq type %d.", __func__, 2153 eq->flags & EQ_TYPEMASK); 2154 } 2155 if (rc != 0) { 2156 device_printf(sc->dev, 2157 "failed to free egress queue (%d): %d\n", 2158 eq->flags & EQ_TYPEMASK, rc); 2159 return (rc); 2160 } 2161 eq->flags &= ~EQ_ALLOCATED; 2162 } 2163 2164 free_ring(sc, eq->desc_tag, eq->desc_map, eq->ba, eq->desc); 2165 2166 if (mtx_initialized(&eq->eq_lock)) 2167 mtx_destroy(&eq->eq_lock); 2168 2169 bzero(eq, sizeof(*eq)); 2170 return (0); 2171 } 2172 2173 static int 2174 alloc_wrq(struct adapter *sc, struct port_info *pi, struct sge_wrq *wrq, 2175 struct sysctl_oid *oid) 2176 { 2177 int rc; 2178 struct sysctl_ctx_list *ctx = pi ? &pi->ctx : &sc->ctx; 2179 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 2180 2181 rc = alloc_eq(sc, pi, &wrq->eq); 2182 if (rc) 2183 return (rc); 2184 2185 wrq->adapter = sc; 2186 2187 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "cntxt_id", CTLFLAG_RD, 2188 &wrq->eq.cntxt_id, 0, "SGE context id of the queue"); 2189 SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cidx", 2190 CTLTYPE_INT | CTLFLAG_RD, &wrq->eq.cidx, 0, sysctl_uint16, "I", 2191 "consumer index"); 2192 SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "pidx", 2193 CTLTYPE_INT | CTLFLAG_RD, &wrq->eq.pidx, 0, sysctl_uint16, "I", 2194 "producer index"); 2195 SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "tx_wrs", CTLFLAG_RD, 2196 &wrq->tx_wrs, "# of work requests"); 2197 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "no_desc", CTLFLAG_RD, 2198 &wrq->no_desc, 0, 2199 "# of times queue ran out of hardware descriptors"); 2200 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "unstalled", CTLFLAG_RD, 2201 &wrq->eq.unstalled, 0, "# of times queue recovered after stall"); 2202 2203 2204 return (rc); 2205 } 2206 2207 static int 2208 free_wrq(struct adapter *sc, struct sge_wrq *wrq) 2209 { 2210 int rc; 2211 2212 rc = free_eq(sc, &wrq->eq); 2213 if (rc) 2214 return (rc); 2215 2216 bzero(wrq, sizeof(*wrq)); 2217 return (0); 2218 } 2219 2220 static int 2221 alloc_txq(struct port_info *pi, struct sge_txq *txq, int idx, 2222 struct sysctl_oid *oid) 2223 { 2224 int rc; 2225 struct adapter *sc = pi->adapter; 2226 struct sge_eq *eq = &txq->eq; 2227 char name[16]; 2228 struct sysctl_oid_list *children = SYSCTL_CHILDREN(oid); 2229 2230 rc = alloc_eq(sc, pi, eq); 2231 if (rc) 2232 return (rc); 2233 2234 txq->ifp = pi->ifp; 2235 2236 txq->sdesc = malloc(eq->cap * sizeof(struct tx_sdesc), M_CXGBE, 2237 M_ZERO | M_WAITOK); 2238 txq->br = buf_ring_alloc(eq->qsize, M_CXGBE, M_WAITOK, &eq->eq_lock); 2239 2240 rc = bus_dma_tag_create(sc->dmat, 1, 0, BUS_SPACE_MAXADDR, 2241 BUS_SPACE_MAXADDR, NULL, NULL, 64 * 1024, TX_SGL_SEGS, 2242 BUS_SPACE_MAXSIZE, BUS_DMA_ALLOCNOW, NULL, NULL, &txq->tx_tag); 2243 if (rc != 0) { 2244 device_printf(sc->dev, 2245 "failed to create tx DMA tag: %d\n", rc); 2246 return (rc); 2247 } 2248 2249 /* 2250 * We can stuff ~10 frames in an 8-descriptor txpkts WR (8 is the SGE 2251 * limit for any WR). txq->no_dmamap events shouldn't occur if maps is 2252 * sized for the worst case. 2253 */ 2254 rc = t4_alloc_tx_maps(&txq->txmaps, txq->tx_tag, eq->qsize * 10 / 8, 2255 M_WAITOK); 2256 if (rc != 0) { 2257 device_printf(sc->dev, "failed to setup tx DMA maps: %d\n", rc); 2258 return (rc); 2259 } 2260 2261 snprintf(name, sizeof(name), "%d", idx); 2262 oid = SYSCTL_ADD_NODE(&pi->ctx, children, OID_AUTO, name, CTLFLAG_RD, 2263 NULL, "tx queue"); 2264 children = SYSCTL_CHILDREN(oid); 2265 2266 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "cntxt_id", CTLFLAG_RD, 2267 &eq->cntxt_id, 0, "SGE context id of the queue"); 2268 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "cidx", 2269 CTLTYPE_INT | CTLFLAG_RD, &eq->cidx, 0, sysctl_uint16, "I", 2270 "consumer index"); 2271 SYSCTL_ADD_PROC(&pi->ctx, children, OID_AUTO, "pidx", 2272 CTLTYPE_INT | CTLFLAG_RD, &eq->pidx, 0, sysctl_uint16, "I", 2273 "producer index"); 2274 2275 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txcsum", CTLFLAG_RD, 2276 &txq->txcsum, "# of times hardware assisted with checksum"); 2277 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "vlan_insertion", 2278 CTLFLAG_RD, &txq->vlan_insertion, 2279 "# of times hardware inserted 802.1Q tag"); 2280 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "tso_wrs", CTLFLAG_RD, 2281 &txq->tso_wrs, "# of IPv4 TSO work requests"); 2282 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "imm_wrs", CTLFLAG_RD, 2283 &txq->imm_wrs, "# of work requests with immediate data"); 2284 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "sgl_wrs", CTLFLAG_RD, 2285 &txq->sgl_wrs, "# of work requests with direct SGL"); 2286 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txpkt_wrs", CTLFLAG_RD, 2287 &txq->txpkt_wrs, "# of txpkt work requests (one pkt/WR)"); 2288 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txpkts_wrs", CTLFLAG_RD, 2289 &txq->txpkts_wrs, "# of txpkts work requests (multiple pkts/WR)"); 2290 SYSCTL_ADD_UQUAD(&pi->ctx, children, OID_AUTO, "txpkts_pkts", CTLFLAG_RD, 2291 &txq->txpkts_pkts, "# of frames tx'd using txpkts work requests"); 2292 2293 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "no_dmamap", CTLFLAG_RD, 2294 &txq->no_dmamap, 0, "# of times txq ran out of DMA maps"); 2295 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "no_desc", CTLFLAG_RD, 2296 &txq->no_desc, 0, "# of times txq ran out of hardware descriptors"); 2297 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "egr_update", CTLFLAG_RD, 2298 &eq->egr_update, 0, "egress update notifications from the SGE"); 2299 SYSCTL_ADD_UINT(&pi->ctx, children, OID_AUTO, "unstalled", CTLFLAG_RD, 2300 &eq->unstalled, 0, "# of times txq recovered after stall"); 2301 2302 return (rc); 2303 } 2304 2305 static int 2306 free_txq(struct port_info *pi, struct sge_txq *txq) 2307 { 2308 int rc; 2309 struct adapter *sc = pi->adapter; 2310 struct sge_eq *eq = &txq->eq; 2311 2312 rc = free_eq(sc, eq); 2313 if (rc) 2314 return (rc); 2315 2316 free(txq->sdesc, M_CXGBE); 2317 2318 if (txq->txmaps.maps) 2319 t4_free_tx_maps(&txq->txmaps, txq->tx_tag); 2320 2321 buf_ring_free(txq->br, M_CXGBE); 2322 2323 if (txq->tx_tag) 2324 bus_dma_tag_destroy(txq->tx_tag); 2325 2326 bzero(txq, sizeof(*txq)); 2327 return (0); 2328 } 2329 2330 static void 2331 oneseg_dma_callback(void *arg, bus_dma_segment_t *segs, int nseg, int error) 2332 { 2333 bus_addr_t *ba = arg; 2334 2335 KASSERT(nseg == 1, 2336 ("%s meant for single segment mappings only.", __func__)); 2337 2338 *ba = error ? 0 : segs->ds_addr; 2339 } 2340 2341 static inline bool 2342 is_new_response(const struct sge_iq *iq, struct rsp_ctrl **ctrl) 2343 { 2344 *ctrl = (void *)((uintptr_t)iq->cdesc + 2345 (iq->esize - sizeof(struct rsp_ctrl))); 2346 2347 return (((*ctrl)->u.type_gen >> S_RSPD_GEN) == iq->gen); 2348 } 2349 2350 static inline void 2351 iq_next(struct sge_iq *iq) 2352 { 2353 iq->cdesc = (void *) ((uintptr_t)iq->cdesc + iq->esize); 2354 if (__predict_false(++iq->cidx == iq->qsize - 1)) { 2355 iq->cidx = 0; 2356 iq->gen ^= 1; 2357 iq->cdesc = iq->desc; 2358 } 2359 } 2360 2361 #define FL_HW_IDX(x) ((x) >> 3) 2362 static inline void 2363 ring_fl_db(struct adapter *sc, struct sge_fl *fl) 2364 { 2365 int ndesc = fl->pending / 8; 2366 2367 if (FL_HW_IDX(fl->pidx) == FL_HW_IDX(fl->cidx)) 2368 ndesc--; /* hold back one credit */ 2369 2370 if (ndesc <= 0) 2371 return; /* nothing to do */ 2372 2373 wmb(); 2374 2375 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), F_DBPRIO | 2376 V_QID(fl->cntxt_id) | V_PIDX(ndesc)); 2377 fl->pending -= ndesc * 8; 2378 } 2379 2380 /* 2381 * Fill up the freelist by upto nbufs and maybe ring its doorbell. 2382 * 2383 * Returns non-zero to indicate that it should be added to the list of starving 2384 * freelists. 2385 */ 2386 static int 2387 refill_fl(struct adapter *sc, struct sge_fl *fl, int nbufs) 2388 { 2389 __be64 *d = &fl->desc[fl->pidx]; 2390 struct fl_sdesc *sd = &fl->sdesc[fl->pidx]; 2391 bus_dma_tag_t tag; 2392 bus_addr_t pa; 2393 caddr_t cl; 2394 int rc; 2395 2396 FL_LOCK_ASSERT_OWNED(fl); 2397 2398 if (nbufs > fl->needed) 2399 nbufs = fl->needed; 2400 2401 while (nbufs--) { 2402 2403 if (sd->cl != NULL) { 2404 2405 /* 2406 * This happens when a frame small enough to fit 2407 * entirely in an mbuf was received in cl last time. 2408 * We'd held on to cl and can reuse it now. Note that 2409 * we reuse a cluster of the old size if fl->tag_idx is 2410 * no longer the same as sd->tag_idx. 2411 */ 2412 2413 KASSERT(*d == sd->ba_tag, 2414 ("%s: recyling problem at pidx %d", 2415 __func__, fl->pidx)); 2416 2417 d++; 2418 goto recycled; 2419 } 2420 2421 2422 if (fl->tag_idx != sd->tag_idx) { 2423 bus_dmamap_t map; 2424 bus_dma_tag_t newtag = fl->tag[fl->tag_idx]; 2425 bus_dma_tag_t oldtag = fl->tag[sd->tag_idx]; 2426 2427 /* 2428 * An MTU change can get us here. Discard the old map 2429 * which was created with the old tag, but only if 2430 * we're able to get a new one. 2431 */ 2432 rc = bus_dmamap_create(newtag, 0, &map); 2433 if (rc == 0) { 2434 bus_dmamap_destroy(oldtag, sd->map); 2435 sd->map = map; 2436 sd->tag_idx = fl->tag_idx; 2437 } 2438 } 2439 2440 tag = fl->tag[sd->tag_idx]; 2441 2442 cl = m_cljget(NULL, M_NOWAIT, FL_BUF_SIZE(sd->tag_idx)); 2443 if (cl == NULL) 2444 break; 2445 2446 rc = bus_dmamap_load(tag, sd->map, cl, FL_BUF_SIZE(sd->tag_idx), 2447 oneseg_dma_callback, &pa, 0); 2448 if (rc != 0 || pa == 0) { 2449 fl->dmamap_failed++; 2450 uma_zfree(FL_BUF_ZONE(sd->tag_idx), cl); 2451 break; 2452 } 2453 2454 sd->cl = cl; 2455 *d++ = htobe64(pa | sd->tag_idx); 2456 2457 #ifdef INVARIANTS 2458 sd->ba_tag = htobe64(pa | sd->tag_idx); 2459 #endif 2460 2461 recycled: 2462 /* sd->m is never recycled, should always be NULL */ 2463 KASSERT(sd->m == NULL, ("%s: stray mbuf", __func__)); 2464 2465 sd->m = m_gethdr(M_NOWAIT, MT_NOINIT); 2466 if (sd->m == NULL) 2467 break; 2468 2469 fl->pending++; 2470 fl->needed--; 2471 sd++; 2472 if (++fl->pidx == fl->cap) { 2473 fl->pidx = 0; 2474 sd = fl->sdesc; 2475 d = fl->desc; 2476 } 2477 } 2478 2479 if (fl->pending >= 8) 2480 ring_fl_db(sc, fl); 2481 2482 return (FL_RUNNING_LOW(fl) && !(fl->flags & FL_STARVING)); 2483 } 2484 2485 /* 2486 * Attempt to refill all starving freelists. 2487 */ 2488 static void 2489 refill_sfl(void *arg) 2490 { 2491 struct adapter *sc = arg; 2492 struct sge_fl *fl, *fl_temp; 2493 2494 mtx_lock(&sc->sfl_lock); 2495 TAILQ_FOREACH_SAFE(fl, &sc->sfl, link, fl_temp) { 2496 FL_LOCK(fl); 2497 refill_fl(sc, fl, 64); 2498 if (FL_NOT_RUNNING_LOW(fl) || fl->flags & FL_DOOMED) { 2499 TAILQ_REMOVE(&sc->sfl, fl, link); 2500 fl->flags &= ~FL_STARVING; 2501 } 2502 FL_UNLOCK(fl); 2503 } 2504 2505 if (!TAILQ_EMPTY(&sc->sfl)) 2506 callout_schedule(&sc->sfl_callout, hz / 5); 2507 mtx_unlock(&sc->sfl_lock); 2508 } 2509 2510 static int 2511 alloc_fl_sdesc(struct sge_fl *fl) 2512 { 2513 struct fl_sdesc *sd; 2514 bus_dma_tag_t tag; 2515 int i, rc; 2516 2517 FL_LOCK_ASSERT_OWNED(fl); 2518 2519 fl->sdesc = malloc(fl->cap * sizeof(struct fl_sdesc), M_CXGBE, 2520 M_ZERO | M_WAITOK); 2521 2522 tag = fl->tag[fl->tag_idx]; 2523 sd = fl->sdesc; 2524 for (i = 0; i < fl->cap; i++, sd++) { 2525 2526 sd->tag_idx = fl->tag_idx; 2527 rc = bus_dmamap_create(tag, 0, &sd->map); 2528 if (rc != 0) 2529 goto failed; 2530 } 2531 2532 return (0); 2533 failed: 2534 while (--i >= 0) { 2535 sd--; 2536 bus_dmamap_destroy(tag, sd->map); 2537 if (sd->m) { 2538 m_init(sd->m, NULL, 0, M_NOWAIT, MT_DATA, 0); 2539 m_free(sd->m); 2540 sd->m = NULL; 2541 } 2542 } 2543 KASSERT(sd == fl->sdesc, ("%s: EDOOFUS", __func__)); 2544 2545 free(fl->sdesc, M_CXGBE); 2546 fl->sdesc = NULL; 2547 2548 return (rc); 2549 } 2550 2551 static void 2552 free_fl_sdesc(struct sge_fl *fl) 2553 { 2554 struct fl_sdesc *sd; 2555 int i; 2556 2557 FL_LOCK_ASSERT_OWNED(fl); 2558 2559 sd = fl->sdesc; 2560 for (i = 0; i < fl->cap; i++, sd++) { 2561 2562 if (sd->m) { 2563 m_init(sd->m, NULL, 0, M_NOWAIT, MT_DATA, 0); 2564 m_free(sd->m); 2565 sd->m = NULL; 2566 } 2567 2568 if (sd->cl) { 2569 bus_dmamap_unload(fl->tag[sd->tag_idx], sd->map); 2570 uma_zfree(FL_BUF_ZONE(sd->tag_idx), sd->cl); 2571 sd->cl = NULL; 2572 } 2573 2574 bus_dmamap_destroy(fl->tag[sd->tag_idx], sd->map); 2575 } 2576 2577 free(fl->sdesc, M_CXGBE); 2578 fl->sdesc = NULL; 2579 } 2580 2581 int 2582 t4_alloc_tx_maps(struct tx_maps *txmaps, bus_dma_tag_t tx_tag, int count, 2583 int flags) 2584 { 2585 struct tx_map *txm; 2586 int i, rc; 2587 2588 txmaps->map_total = txmaps->map_avail = count; 2589 txmaps->map_cidx = txmaps->map_pidx = 0; 2590 2591 txmaps->maps = malloc(count * sizeof(struct tx_map), M_CXGBE, 2592 M_ZERO | flags); 2593 2594 txm = txmaps->maps; 2595 for (i = 0; i < count; i++, txm++) { 2596 rc = bus_dmamap_create(tx_tag, 0, &txm->map); 2597 if (rc != 0) 2598 goto failed; 2599 } 2600 2601 return (0); 2602 failed: 2603 while (--i >= 0) { 2604 txm--; 2605 bus_dmamap_destroy(tx_tag, txm->map); 2606 } 2607 KASSERT(txm == txmaps->maps, ("%s: EDOOFUS", __func__)); 2608 2609 free(txmaps->maps, M_CXGBE); 2610 txmaps->maps = NULL; 2611 2612 return (rc); 2613 } 2614 2615 void 2616 t4_free_tx_maps(struct tx_maps *txmaps, bus_dma_tag_t tx_tag) 2617 { 2618 struct tx_map *txm; 2619 int i; 2620 2621 txm = txmaps->maps; 2622 for (i = 0; i < txmaps->map_total; i++, txm++) { 2623 2624 if (txm->m) { 2625 bus_dmamap_unload(tx_tag, txm->map); 2626 m_freem(txm->m); 2627 txm->m = NULL; 2628 } 2629 2630 bus_dmamap_destroy(tx_tag, txm->map); 2631 } 2632 2633 free(txmaps->maps, M_CXGBE); 2634 txmaps->maps = NULL; 2635 } 2636 2637 /* 2638 * We'll do immediate data tx for non-TSO, but only when not coalescing. We're 2639 * willing to use upto 2 hardware descriptors which means a maximum of 96 bytes 2640 * of immediate data. 2641 */ 2642 #define IMM_LEN ( \ 2643 2 * EQ_ESIZE \ 2644 - sizeof(struct fw_eth_tx_pkt_wr) \ 2645 - sizeof(struct cpl_tx_pkt_core)) 2646 2647 /* 2648 * Returns non-zero on failure, no need to cleanup anything in that case. 2649 * 2650 * Note 1: We always try to defrag the mbuf if required and return EFBIG only 2651 * if the resulting chain still won't fit in a tx descriptor. 2652 * 2653 * Note 2: We'll pullup the mbuf chain if TSO is requested and the first mbuf 2654 * does not have the TCP header in it. 2655 */ 2656 static int 2657 get_pkt_sgl(struct sge_txq *txq, struct mbuf **fp, struct sgl *sgl, 2658 int sgl_only) 2659 { 2660 struct mbuf *m = *fp; 2661 struct tx_maps *txmaps; 2662 struct tx_map *txm; 2663 int rc, defragged = 0, n; 2664 2665 TXQ_LOCK_ASSERT_OWNED(txq); 2666 2667 if (m->m_pkthdr.tso_segsz) 2668 sgl_only = 1; /* Do not allow immediate data with LSO */ 2669 2670 start: sgl->nsegs = 0; 2671 2672 if (m->m_pkthdr.len <= IMM_LEN && !sgl_only) 2673 return (0); /* nsegs = 0 tells caller to use imm. tx */ 2674 2675 txmaps = &txq->txmaps; 2676 if (txmaps->map_avail == 0) { 2677 txq->no_dmamap++; 2678 return (ENOMEM); 2679 } 2680 txm = &txmaps->maps[txmaps->map_pidx]; 2681 2682 if (m->m_pkthdr.tso_segsz && m->m_len < 50) { 2683 *fp = m_pullup(m, 50); 2684 m = *fp; 2685 if (m == NULL) 2686 return (ENOBUFS); 2687 } 2688 2689 rc = bus_dmamap_load_mbuf_sg(txq->tx_tag, txm->map, m, sgl->seg, 2690 &sgl->nsegs, BUS_DMA_NOWAIT); 2691 if (rc == EFBIG && defragged == 0) { 2692 m = m_defrag(m, M_DONTWAIT); 2693 if (m == NULL) 2694 return (EFBIG); 2695 2696 defragged = 1; 2697 *fp = m; 2698 goto start; 2699 } 2700 if (rc != 0) 2701 return (rc); 2702 2703 txm->m = m; 2704 txmaps->map_avail--; 2705 if (++txmaps->map_pidx == txmaps->map_total) 2706 txmaps->map_pidx = 0; 2707 2708 KASSERT(sgl->nsegs > 0 && sgl->nsegs <= TX_SGL_SEGS, 2709 ("%s: bad DMA mapping (%d segments)", __func__, sgl->nsegs)); 2710 2711 /* 2712 * Store the # of flits required to hold this frame's SGL in nflits. An 2713 * SGL has a (ULPTX header + len0, addr0) tuple optionally followed by 2714 * multiple (len0 + len1, addr0, addr1) tuples. If addr1 is not used 2715 * then len1 must be set to 0. 2716 */ 2717 n = sgl->nsegs - 1; 2718 sgl->nflits = (3 * n) / 2 + (n & 1) + 2; 2719 2720 return (0); 2721 } 2722 2723 2724 /* 2725 * Releases all the txq resources used up in the specified sgl. 2726 */ 2727 static int 2728 free_pkt_sgl(struct sge_txq *txq, struct sgl *sgl) 2729 { 2730 struct tx_maps *txmaps; 2731 struct tx_map *txm; 2732 2733 TXQ_LOCK_ASSERT_OWNED(txq); 2734 2735 if (sgl->nsegs == 0) 2736 return (0); /* didn't use any map */ 2737 2738 txmaps = &txq->txmaps; 2739 2740 /* 1 pkt uses exactly 1 map, back it out */ 2741 2742 txmaps->map_avail++; 2743 if (txmaps->map_pidx > 0) 2744 txmaps->map_pidx--; 2745 else 2746 txmaps->map_pidx = txmaps->map_total - 1; 2747 2748 txm = &txmaps->maps[txmaps->map_pidx]; 2749 bus_dmamap_unload(txq->tx_tag, txm->map); 2750 txm->m = NULL; 2751 2752 return (0); 2753 } 2754 2755 static int 2756 write_txpkt_wr(struct port_info *pi, struct sge_txq *txq, struct mbuf *m, 2757 struct sgl *sgl) 2758 { 2759 struct sge_eq *eq = &txq->eq; 2760 struct fw_eth_tx_pkt_wr *wr; 2761 struct cpl_tx_pkt_core *cpl; 2762 uint32_t ctrl; /* used in many unrelated places */ 2763 uint64_t ctrl1; 2764 int nflits, ndesc, pktlen; 2765 struct tx_sdesc *txsd; 2766 caddr_t dst; 2767 2768 TXQ_LOCK_ASSERT_OWNED(txq); 2769 2770 pktlen = m->m_pkthdr.len; 2771 2772 /* 2773 * Do we have enough flits to send this frame out? 2774 */ 2775 ctrl = sizeof(struct cpl_tx_pkt_core); 2776 if (m->m_pkthdr.tso_segsz) { 2777 nflits = TXPKT_LSO_WR_HDR; 2778 ctrl += sizeof(struct cpl_tx_pkt_lso); 2779 } else 2780 nflits = TXPKT_WR_HDR; 2781 if (sgl->nsegs > 0) 2782 nflits += sgl->nflits; 2783 else { 2784 nflits += howmany(pktlen, 8); 2785 ctrl += pktlen; 2786 } 2787 ndesc = howmany(nflits, 8); 2788 if (ndesc > eq->avail) 2789 return (ENOMEM); 2790 2791 /* Firmware work request header */ 2792 wr = (void *)&eq->desc[eq->pidx]; 2793 wr->op_immdlen = htobe32(V_FW_WR_OP(FW_ETH_TX_PKT_WR) | 2794 V_FW_ETH_TX_PKT_WR_IMMDLEN(ctrl)); 2795 ctrl = V_FW_WR_LEN16(howmany(nflits, 2)); 2796 if (eq->avail == ndesc) { 2797 if (!(eq->flags & EQ_CRFLUSHED)) { 2798 ctrl |= F_FW_WR_EQUEQ | F_FW_WR_EQUIQ; 2799 eq->flags |= EQ_CRFLUSHED; 2800 } 2801 eq->flags |= EQ_STALLED; 2802 } 2803 2804 wr->equiq_to_len16 = htobe32(ctrl); 2805 wr->r3 = 0; 2806 2807 if (m->m_pkthdr.tso_segsz) { 2808 struct cpl_tx_pkt_lso *lso = (void *)(wr + 1); 2809 struct ether_header *eh; 2810 struct ip *ip; 2811 struct tcphdr *tcp; 2812 2813 ctrl = V_LSO_OPCODE(CPL_TX_PKT_LSO) | F_LSO_FIRST_SLICE | 2814 F_LSO_LAST_SLICE; 2815 2816 eh = mtod(m, struct ether_header *); 2817 if (eh->ether_type == htons(ETHERTYPE_VLAN)) { 2818 ctrl |= V_LSO_ETHHDR_LEN(1); 2819 ip = (void *)((struct ether_vlan_header *)eh + 1); 2820 } else 2821 ip = (void *)(eh + 1); 2822 2823 tcp = (void *)((uintptr_t)ip + ip->ip_hl * 4); 2824 ctrl |= V_LSO_IPHDR_LEN(ip->ip_hl) | 2825 V_LSO_TCPHDR_LEN(tcp->th_off); 2826 2827 lso->lso_ctrl = htobe32(ctrl); 2828 lso->ipid_ofst = htobe16(0); 2829 lso->mss = htobe16(m->m_pkthdr.tso_segsz); 2830 lso->seqno_offset = htobe32(0); 2831 lso->len = htobe32(pktlen); 2832 2833 cpl = (void *)(lso + 1); 2834 2835 txq->tso_wrs++; 2836 } else 2837 cpl = (void *)(wr + 1); 2838 2839 /* Checksum offload */ 2840 ctrl1 = 0; 2841 if (!(m->m_pkthdr.csum_flags & CSUM_IP)) 2842 ctrl1 |= F_TXPKT_IPCSUM_DIS; 2843 if (!(m->m_pkthdr.csum_flags & (CSUM_TCP | CSUM_UDP))) 2844 ctrl1 |= F_TXPKT_L4CSUM_DIS; 2845 if (m->m_pkthdr.csum_flags & (CSUM_IP | CSUM_TCP | CSUM_UDP)) 2846 txq->txcsum++; /* some hardware assistance provided */ 2847 2848 /* VLAN tag insertion */ 2849 if (m->m_flags & M_VLANTAG) { 2850 ctrl1 |= F_TXPKT_VLAN_VLD | V_TXPKT_VLAN(m->m_pkthdr.ether_vtag); 2851 txq->vlan_insertion++; 2852 } 2853 2854 /* CPL header */ 2855 cpl->ctrl0 = htobe32(V_TXPKT_OPCODE(CPL_TX_PKT) | 2856 V_TXPKT_INTF(pi->tx_chan) | V_TXPKT_PF(pi->adapter->pf)); 2857 cpl->pack = 0; 2858 cpl->len = htobe16(pktlen); 2859 cpl->ctrl1 = htobe64(ctrl1); 2860 2861 /* Software descriptor */ 2862 txsd = &txq->sdesc[eq->pidx]; 2863 txsd->desc_used = ndesc; 2864 2865 eq->pending += ndesc; 2866 eq->avail -= ndesc; 2867 eq->pidx += ndesc; 2868 if (eq->pidx >= eq->cap) 2869 eq->pidx -= eq->cap; 2870 2871 /* SGL */ 2872 dst = (void *)(cpl + 1); 2873 if (sgl->nsegs > 0) { 2874 txsd->credits = 1; 2875 txq->sgl_wrs++; 2876 write_sgl_to_txd(eq, sgl, &dst); 2877 } else { 2878 txsd->credits = 0; 2879 txq->imm_wrs++; 2880 for (; m; m = m->m_next) { 2881 copy_to_txd(eq, mtod(m, caddr_t), &dst, m->m_len); 2882 #ifdef INVARIANTS 2883 pktlen -= m->m_len; 2884 #endif 2885 } 2886 #ifdef INVARIANTS 2887 KASSERT(pktlen == 0, ("%s: %d bytes left.", __func__, pktlen)); 2888 #endif 2889 2890 } 2891 2892 txq->txpkt_wrs++; 2893 return (0); 2894 } 2895 2896 /* 2897 * Returns 0 to indicate that m has been accepted into a coalesced tx work 2898 * request. It has either been folded into txpkts or txpkts was flushed and m 2899 * has started a new coalesced work request (as the first frame in a fresh 2900 * txpkts). 2901 * 2902 * Returns non-zero to indicate a failure - caller is responsible for 2903 * transmitting m, if there was anything in txpkts it has been flushed. 2904 */ 2905 static int 2906 add_to_txpkts(struct port_info *pi, struct sge_txq *txq, struct txpkts *txpkts, 2907 struct mbuf *m, struct sgl *sgl) 2908 { 2909 struct sge_eq *eq = &txq->eq; 2910 int can_coalesce; 2911 struct tx_sdesc *txsd; 2912 int flits; 2913 2914 TXQ_LOCK_ASSERT_OWNED(txq); 2915 2916 KASSERT(sgl->nsegs, ("%s: can't coalesce imm data", __func__)); 2917 2918 if (txpkts->npkt > 0) { 2919 flits = TXPKTS_PKT_HDR + sgl->nflits; 2920 can_coalesce = m->m_pkthdr.tso_segsz == 0 && 2921 txpkts->nflits + flits <= TX_WR_FLITS && 2922 txpkts->nflits + flits <= eq->avail * 8 && 2923 txpkts->plen + m->m_pkthdr.len < 65536; 2924 2925 if (can_coalesce) { 2926 txpkts->npkt++; 2927 txpkts->nflits += flits; 2928 txpkts->plen += m->m_pkthdr.len; 2929 2930 txsd = &txq->sdesc[eq->pidx]; 2931 txsd->credits++; 2932 2933 return (0); 2934 } 2935 2936 /* 2937 * Couldn't coalesce m into txpkts. The first order of business 2938 * is to send txpkts on its way. Then we'll revisit m. 2939 */ 2940 write_txpkts_wr(txq, txpkts); 2941 } 2942 2943 /* 2944 * Check if we can start a new coalesced tx work request with m as 2945 * the first packet in it. 2946 */ 2947 2948 KASSERT(txpkts->npkt == 0, ("%s: txpkts not empty", __func__)); 2949 2950 flits = TXPKTS_WR_HDR + sgl->nflits; 2951 can_coalesce = m->m_pkthdr.tso_segsz == 0 && 2952 flits <= eq->avail * 8 && flits <= TX_WR_FLITS; 2953 2954 if (can_coalesce == 0) 2955 return (EINVAL); 2956 2957 /* 2958 * Start a fresh coalesced tx WR with m as the first frame in it. 2959 */ 2960 txpkts->npkt = 1; 2961 txpkts->nflits = flits; 2962 txpkts->flitp = &eq->desc[eq->pidx].flit[2]; 2963 txpkts->plen = m->m_pkthdr.len; 2964 2965 txsd = &txq->sdesc[eq->pidx]; 2966 txsd->credits = 1; 2967 2968 return (0); 2969 } 2970 2971 /* 2972 * Note that write_txpkts_wr can never run out of hardware descriptors (but 2973 * write_txpkt_wr can). add_to_txpkts ensures that a frame is accepted for 2974 * coalescing only if sufficient hardware descriptors are available. 2975 */ 2976 static void 2977 write_txpkts_wr(struct sge_txq *txq, struct txpkts *txpkts) 2978 { 2979 struct sge_eq *eq = &txq->eq; 2980 struct fw_eth_tx_pkts_wr *wr; 2981 struct tx_sdesc *txsd; 2982 uint32_t ctrl; 2983 int ndesc; 2984 2985 TXQ_LOCK_ASSERT_OWNED(txq); 2986 2987 ndesc = howmany(txpkts->nflits, 8); 2988 2989 wr = (void *)&eq->desc[eq->pidx]; 2990 wr->op_pkd = htobe32(V_FW_WR_OP(FW_ETH_TX_PKTS_WR)); 2991 ctrl = V_FW_WR_LEN16(howmany(txpkts->nflits, 2)); 2992 if (eq->avail == ndesc) { 2993 if (!(eq->flags & EQ_CRFLUSHED)) { 2994 ctrl |= F_FW_WR_EQUEQ | F_FW_WR_EQUIQ; 2995 eq->flags |= EQ_CRFLUSHED; 2996 } 2997 eq->flags |= EQ_STALLED; 2998 } 2999 wr->equiq_to_len16 = htobe32(ctrl); 3000 wr->plen = htobe16(txpkts->plen); 3001 wr->npkt = txpkts->npkt; 3002 wr->r3 = wr->type = 0; 3003 3004 /* Everything else already written */ 3005 3006 txsd = &txq->sdesc[eq->pidx]; 3007 txsd->desc_used = ndesc; 3008 3009 KASSERT(eq->avail >= ndesc, ("%s: out of descriptors", __func__)); 3010 3011 eq->pending += ndesc; 3012 eq->avail -= ndesc; 3013 eq->pidx += ndesc; 3014 if (eq->pidx >= eq->cap) 3015 eq->pidx -= eq->cap; 3016 3017 txq->txpkts_pkts += txpkts->npkt; 3018 txq->txpkts_wrs++; 3019 txpkts->npkt = 0; /* emptied */ 3020 } 3021 3022 static inline void 3023 write_ulp_cpl_sgl(struct port_info *pi, struct sge_txq *txq, 3024 struct txpkts *txpkts, struct mbuf *m, struct sgl *sgl) 3025 { 3026 struct ulp_txpkt *ulpmc; 3027 struct ulptx_idata *ulpsc; 3028 struct cpl_tx_pkt_core *cpl; 3029 struct sge_eq *eq = &txq->eq; 3030 uintptr_t flitp, start, end; 3031 uint64_t ctrl; 3032 caddr_t dst; 3033 3034 KASSERT(txpkts->npkt > 0, ("%s: txpkts is empty", __func__)); 3035 3036 start = (uintptr_t)eq->desc; 3037 end = (uintptr_t)eq->spg; 3038 3039 /* Checksum offload */ 3040 ctrl = 0; 3041 if (!(m->m_pkthdr.csum_flags & CSUM_IP)) 3042 ctrl |= F_TXPKT_IPCSUM_DIS; 3043 if (!(m->m_pkthdr.csum_flags & (CSUM_TCP | CSUM_UDP))) 3044 ctrl |= F_TXPKT_L4CSUM_DIS; 3045 if (m->m_pkthdr.csum_flags & (CSUM_IP | CSUM_TCP | CSUM_UDP)) 3046 txq->txcsum++; /* some hardware assistance provided */ 3047 3048 /* VLAN tag insertion */ 3049 if (m->m_flags & M_VLANTAG) { 3050 ctrl |= F_TXPKT_VLAN_VLD | V_TXPKT_VLAN(m->m_pkthdr.ether_vtag); 3051 txq->vlan_insertion++; 3052 } 3053 3054 /* 3055 * The previous packet's SGL must have ended at a 16 byte boundary (this 3056 * is required by the firmware/hardware). It follows that flitp cannot 3057 * wrap around between the ULPTX master command and ULPTX subcommand (8 3058 * bytes each), and that it can not wrap around in the middle of the 3059 * cpl_tx_pkt_core either. 3060 */ 3061 flitp = (uintptr_t)txpkts->flitp; 3062 KASSERT((flitp & 0xf) == 0, 3063 ("%s: last SGL did not end at 16 byte boundary: %p", 3064 __func__, txpkts->flitp)); 3065 3066 /* ULP master command */ 3067 ulpmc = (void *)flitp; 3068 ulpmc->cmd_dest = htonl(V_ULPTX_CMD(ULP_TX_PKT) | V_ULP_TXPKT_DEST(0) | 3069 V_ULP_TXPKT_FID(eq->iqid)); 3070 ulpmc->len = htonl(howmany(sizeof(*ulpmc) + sizeof(*ulpsc) + 3071 sizeof(*cpl) + 8 * sgl->nflits, 16)); 3072 3073 /* ULP subcommand */ 3074 ulpsc = (void *)(ulpmc + 1); 3075 ulpsc->cmd_more = htobe32(V_ULPTX_CMD((u32)ULP_TX_SC_IMM) | 3076 F_ULP_TX_SC_MORE); 3077 ulpsc->len = htobe32(sizeof(struct cpl_tx_pkt_core)); 3078 3079 flitp += sizeof(*ulpmc) + sizeof(*ulpsc); 3080 if (flitp == end) 3081 flitp = start; 3082 3083 /* CPL_TX_PKT */ 3084 cpl = (void *)flitp; 3085 cpl->ctrl0 = htobe32(V_TXPKT_OPCODE(CPL_TX_PKT) | 3086 V_TXPKT_INTF(pi->tx_chan) | V_TXPKT_PF(pi->adapter->pf)); 3087 cpl->pack = 0; 3088 cpl->len = htobe16(m->m_pkthdr.len); 3089 cpl->ctrl1 = htobe64(ctrl); 3090 3091 flitp += sizeof(*cpl); 3092 if (flitp == end) 3093 flitp = start; 3094 3095 /* SGL for this frame */ 3096 dst = (caddr_t)flitp; 3097 txpkts->nflits += write_sgl_to_txd(eq, sgl, &dst); 3098 txpkts->flitp = (void *)dst; 3099 3100 KASSERT(((uintptr_t)dst & 0xf) == 0, 3101 ("%s: SGL ends at %p (not a 16 byte boundary)", __func__, dst)); 3102 } 3103 3104 /* 3105 * If the SGL ends on an address that is not 16 byte aligned, this function will 3106 * add a 0 filled flit at the end. It returns 1 in that case. 3107 */ 3108 static int 3109 write_sgl_to_txd(struct sge_eq *eq, struct sgl *sgl, caddr_t *to) 3110 { 3111 __be64 *flitp, *end; 3112 struct ulptx_sgl *usgl; 3113 bus_dma_segment_t *seg; 3114 int i, padded; 3115 3116 KASSERT(sgl->nsegs > 0 && sgl->nflits > 0, 3117 ("%s: bad SGL - nsegs=%d, nflits=%d", 3118 __func__, sgl->nsegs, sgl->nflits)); 3119 3120 KASSERT(((uintptr_t)(*to) & 0xf) == 0, 3121 ("%s: SGL must start at a 16 byte boundary: %p", __func__, *to)); 3122 3123 flitp = (__be64 *)(*to); 3124 end = flitp + sgl->nflits; 3125 seg = &sgl->seg[0]; 3126 usgl = (void *)flitp; 3127 3128 /* 3129 * We start at a 16 byte boundary somewhere inside the tx descriptor 3130 * ring, so we're at least 16 bytes away from the status page. There is 3131 * no chance of a wrap around in the middle of usgl (which is 16 bytes). 3132 */ 3133 3134 usgl->cmd_nsge = htobe32(V_ULPTX_CMD(ULP_TX_SC_DSGL) | 3135 V_ULPTX_NSGE(sgl->nsegs)); 3136 usgl->len0 = htobe32(seg->ds_len); 3137 usgl->addr0 = htobe64(seg->ds_addr); 3138 seg++; 3139 3140 if ((uintptr_t)end <= (uintptr_t)eq->spg) { 3141 3142 /* Won't wrap around at all */ 3143 3144 for (i = 0; i < sgl->nsegs - 1; i++, seg++) { 3145 usgl->sge[i / 2].len[i & 1] = htobe32(seg->ds_len); 3146 usgl->sge[i / 2].addr[i & 1] = htobe64(seg->ds_addr); 3147 } 3148 if (i & 1) 3149 usgl->sge[i / 2].len[1] = htobe32(0); 3150 } else { 3151 3152 /* Will wrap somewhere in the rest of the SGL */ 3153 3154 /* 2 flits already written, write the rest flit by flit */ 3155 flitp = (void *)(usgl + 1); 3156 for (i = 0; i < sgl->nflits - 2; i++) { 3157 if ((uintptr_t)flitp == (uintptr_t)eq->spg) 3158 flitp = (void *)eq->desc; 3159 *flitp++ = get_flit(seg, sgl->nsegs - 1, i); 3160 } 3161 end = flitp; 3162 } 3163 3164 if ((uintptr_t)end & 0xf) { 3165 *(uint64_t *)end = 0; 3166 end++; 3167 padded = 1; 3168 } else 3169 padded = 0; 3170 3171 if ((uintptr_t)end == (uintptr_t)eq->spg) 3172 *to = (void *)eq->desc; 3173 else 3174 *to = (void *)end; 3175 3176 return (padded); 3177 } 3178 3179 static inline void 3180 copy_to_txd(struct sge_eq *eq, caddr_t from, caddr_t *to, int len) 3181 { 3182 if ((uintptr_t)(*to) + len <= (uintptr_t)eq->spg) { 3183 bcopy(from, *to, len); 3184 (*to) += len; 3185 } else { 3186 int portion = (uintptr_t)eq->spg - (uintptr_t)(*to); 3187 3188 bcopy(from, *to, portion); 3189 from += portion; 3190 portion = len - portion; /* remaining */ 3191 bcopy(from, (void *)eq->desc, portion); 3192 (*to) = (caddr_t)eq->desc + portion; 3193 } 3194 } 3195 3196 static inline void 3197 ring_eq_db(struct adapter *sc, struct sge_eq *eq) 3198 { 3199 wmb(); 3200 t4_write_reg(sc, MYPF_REG(A_SGE_PF_KDOORBELL), 3201 V_QID(eq->cntxt_id) | V_PIDX(eq->pending)); 3202 eq->pending = 0; 3203 } 3204 3205 static inline int 3206 reclaimable(struct sge_eq *eq) 3207 { 3208 unsigned int cidx; 3209 3210 cidx = eq->spg->cidx; /* stable snapshot */ 3211 cidx = be16toh(cidx); 3212 3213 if (cidx >= eq->cidx) 3214 return (cidx - eq->cidx); 3215 else 3216 return (cidx + eq->cap - eq->cidx); 3217 } 3218 3219 /* 3220 * There are "can_reclaim" tx descriptors ready to be reclaimed. Reclaim as 3221 * many as possible but stop when there are around "n" mbufs to free. 3222 * 3223 * The actual number reclaimed is provided as the return value. 3224 */ 3225 static int 3226 reclaim_tx_descs(struct sge_txq *txq, int can_reclaim, int n) 3227 { 3228 struct tx_sdesc *txsd; 3229 struct tx_maps *txmaps; 3230 struct tx_map *txm; 3231 unsigned int reclaimed, maps; 3232 struct sge_eq *eq = &txq->eq; 3233 3234 TXQ_LOCK_ASSERT_OWNED(txq); 3235 3236 if (can_reclaim == 0) 3237 can_reclaim = reclaimable(eq); 3238 3239 maps = reclaimed = 0; 3240 while (can_reclaim && maps < n) { 3241 int ndesc; 3242 3243 txsd = &txq->sdesc[eq->cidx]; 3244 ndesc = txsd->desc_used; 3245 3246 /* Firmware doesn't return "partial" credits. */ 3247 KASSERT(can_reclaim >= ndesc, 3248 ("%s: unexpected number of credits: %d, %d", 3249 __func__, can_reclaim, ndesc)); 3250 3251 maps += txsd->credits; 3252 3253 reclaimed += ndesc; 3254 can_reclaim -= ndesc; 3255 3256 eq->cidx += ndesc; 3257 if (__predict_false(eq->cidx >= eq->cap)) 3258 eq->cidx -= eq->cap; 3259 } 3260 3261 txmaps = &txq->txmaps; 3262 txm = &txmaps->maps[txmaps->map_cidx]; 3263 if (maps) 3264 prefetch(txm->m); 3265 3266 eq->avail += reclaimed; 3267 KASSERT(eq->avail < eq->cap, /* avail tops out at (cap - 1) */ 3268 ("%s: too many descriptors available", __func__)); 3269 3270 txmaps->map_avail += maps; 3271 KASSERT(txmaps->map_avail <= txmaps->map_total, 3272 ("%s: too many maps available", __func__)); 3273 3274 while (maps--) { 3275 struct tx_map *next; 3276 3277 next = txm + 1; 3278 if (__predict_false(txmaps->map_cidx + 1 == txmaps->map_total)) 3279 next = txmaps->maps; 3280 prefetch(next->m); 3281 3282 bus_dmamap_unload(txq->tx_tag, txm->map); 3283 m_freem(txm->m); 3284 txm->m = NULL; 3285 3286 txm = next; 3287 if (__predict_false(++txmaps->map_cidx == txmaps->map_total)) 3288 txmaps->map_cidx = 0; 3289 } 3290 3291 return (reclaimed); 3292 } 3293 3294 static void 3295 write_eqflush_wr(struct sge_eq *eq) 3296 { 3297 struct fw_eq_flush_wr *wr; 3298 3299 EQ_LOCK_ASSERT_OWNED(eq); 3300 KASSERT(eq->avail > 0, ("%s: no descriptors left.", __func__)); 3301 KASSERT(!(eq->flags & EQ_CRFLUSHED), ("%s: flushed already", __func__)); 3302 3303 wr = (void *)&eq->desc[eq->pidx]; 3304 bzero(wr, sizeof(*wr)); 3305 wr->opcode = FW_EQ_FLUSH_WR; 3306 wr->equiq_to_len16 = htobe32(V_FW_WR_LEN16(sizeof(*wr) / 16) | 3307 F_FW_WR_EQUEQ | F_FW_WR_EQUIQ); 3308 3309 eq->flags |= (EQ_CRFLUSHED | EQ_STALLED); 3310 eq->pending++; 3311 eq->avail--; 3312 if (++eq->pidx == eq->cap) 3313 eq->pidx = 0; 3314 } 3315 3316 static __be64 3317 get_flit(bus_dma_segment_t *sgl, int nsegs, int idx) 3318 { 3319 int i = (idx / 3) * 2; 3320 3321 switch (idx % 3) { 3322 case 0: { 3323 __be64 rc; 3324 3325 rc = htobe32(sgl[i].ds_len); 3326 if (i + 1 < nsegs) 3327 rc |= (uint64_t)htobe32(sgl[i + 1].ds_len) << 32; 3328 3329 return (rc); 3330 } 3331 case 1: 3332 return htobe64(sgl[i].ds_addr); 3333 case 2: 3334 return htobe64(sgl[i + 1].ds_addr); 3335 } 3336 3337 return (0); 3338 } 3339 3340 static void 3341 set_fl_tag_idx(struct sge_fl *fl, int bufsize) 3342 { 3343 int i; 3344 3345 for (i = 0; i < FL_BUF_SIZES - 1; i++) { 3346 if (FL_BUF_SIZE(i) >= bufsize) 3347 break; 3348 } 3349 3350 fl->tag_idx = i; 3351 } 3352 3353 static void 3354 add_fl_to_sfl(struct adapter *sc, struct sge_fl *fl) 3355 { 3356 mtx_lock(&sc->sfl_lock); 3357 FL_LOCK(fl); 3358 if ((fl->flags & FL_DOOMED) == 0) { 3359 fl->flags |= FL_STARVING; 3360 TAILQ_INSERT_TAIL(&sc->sfl, fl, link); 3361 callout_reset(&sc->sfl_callout, hz / 5, refill_sfl, sc); 3362 } 3363 FL_UNLOCK(fl); 3364 mtx_unlock(&sc->sfl_lock); 3365 } 3366 3367 static int 3368 handle_sge_egr_update(struct sge_iq *iq, const struct rss_header *rss, 3369 struct mbuf *m) 3370 { 3371 const struct cpl_sge_egr_update *cpl = (const void *)(rss + 1); 3372 unsigned int qid = G_EGR_QID(ntohl(cpl->opcode_qid)); 3373 struct adapter *sc = iq->adapter; 3374 struct sge *s = &sc->sge; 3375 struct sge_eq *eq; 3376 3377 KASSERT(m == NULL, ("%s: payload with opcode %02x", __func__, 3378 rss->opcode)); 3379 3380 eq = s->eqmap[qid - s->eq_start]; 3381 EQ_LOCK(eq); 3382 KASSERT(eq->flags & EQ_CRFLUSHED, 3383 ("%s: unsolicited egress update", __func__)); 3384 eq->flags &= ~EQ_CRFLUSHED; 3385 eq->egr_update++; 3386 3387 if (__predict_false(eq->flags & EQ_DOOMED)) 3388 wakeup_one(eq); 3389 else if (eq->flags & EQ_STALLED && can_resume_tx(eq)) 3390 taskqueue_enqueue(sc->tq[eq->tx_chan], &eq->tx_task); 3391 EQ_UNLOCK(eq); 3392 3393 return (0); 3394 } 3395 3396 static int 3397 handle_fw_rpl(struct sge_iq *iq, const struct rss_header *rss, struct mbuf *m) 3398 { 3399 const struct cpl_fw6_msg *cpl = (const void *)(rss + 1); 3400 3401 KASSERT(m == NULL, ("%s: payload with opcode %02x", __func__, 3402 rss->opcode)); 3403 3404 if (cpl->type == FW6_TYPE_CMD_RPL) 3405 t4_handle_fw_rpl(iq->adapter, cpl->data); 3406 3407 return (0); 3408 } 3409 3410 static int 3411 sysctl_uint16(SYSCTL_HANDLER_ARGS) 3412 { 3413 uint16_t *id = arg1; 3414 int i = *id; 3415 3416 return sysctl_handle_int(oidp, &i, 0, req); 3417 } 3418