1 /************************************************************************** 2 SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 4 Copyright (c) 2007-2009, Chelsio Inc. 5 All rights reserved. 6 7 Redistribution and use in source and binary forms, with or without 8 modification, are permitted provided that the following conditions are met: 9 10 1. Redistributions of source code must retain the above copyright notice, 11 this list of conditions and the following disclaimer. 12 13 2. Neither the name of the Chelsio Corporation nor the names of its 14 contributors may be used to endorse or promote products derived from 15 this software without specific prior written permission. 16 17 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 21 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 POSSIBILITY OF SUCH DAMAGE. 28 29 ***************************************************************************/ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include "opt_inet6.h" 35 #include "opt_inet.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/module.h> 41 #include <sys/bus.h> 42 #include <sys/conf.h> 43 #include <machine/bus.h> 44 #include <machine/resource.h> 45 #include <sys/rman.h> 46 #include <sys/queue.h> 47 #include <sys/sysctl.h> 48 #include <sys/taskqueue.h> 49 50 #include <sys/proc.h> 51 #include <sys/sbuf.h> 52 #include <sys/sched.h> 53 #include <sys/smp.h> 54 #include <sys/systm.h> 55 #include <sys/syslog.h> 56 #include <sys/socket.h> 57 #include <sys/sglist.h> 58 59 #include <net/if.h> 60 #include <net/if_var.h> 61 #include <net/bpf.h> 62 #include <net/ethernet.h> 63 #include <net/if_vlan_var.h> 64 65 #include <netinet/in_systm.h> 66 #include <netinet/in.h> 67 #include <netinet/ip.h> 68 #include <netinet/ip6.h> 69 #include <netinet/tcp.h> 70 71 #include <dev/pci/pcireg.h> 72 #include <dev/pci/pcivar.h> 73 74 #include <vm/vm.h> 75 #include <vm/pmap.h> 76 77 #include <cxgb_include.h> 78 #include <sys/mvec.h> 79 80 int txq_fills = 0; 81 int multiq_tx_enable = 1; 82 83 #ifdef TCP_OFFLOAD 84 CTASSERT(NUM_CPL_HANDLERS >= NUM_CPL_CMDS); 85 #endif 86 87 extern struct sysctl_oid_list sysctl__hw_cxgb_children; 88 int cxgb_txq_buf_ring_size = TX_ETH_Q_SIZE; 89 SYSCTL_INT(_hw_cxgb, OID_AUTO, txq_mr_size, CTLFLAG_RDTUN, &cxgb_txq_buf_ring_size, 0, 90 "size of per-queue mbuf ring"); 91 92 static int cxgb_tx_coalesce_force = 0; 93 SYSCTL_INT(_hw_cxgb, OID_AUTO, tx_coalesce_force, CTLFLAG_RWTUN, 94 &cxgb_tx_coalesce_force, 0, 95 "coalesce small packets into a single work request regardless of ring state"); 96 97 #define COALESCE_START_DEFAULT TX_ETH_Q_SIZE>>1 98 #define COALESCE_START_MAX (TX_ETH_Q_SIZE-(TX_ETH_Q_SIZE>>3)) 99 #define COALESCE_STOP_DEFAULT TX_ETH_Q_SIZE>>2 100 #define COALESCE_STOP_MIN TX_ETH_Q_SIZE>>5 101 #define TX_RECLAIM_DEFAULT TX_ETH_Q_SIZE>>5 102 #define TX_RECLAIM_MAX TX_ETH_Q_SIZE>>2 103 #define TX_RECLAIM_MIN TX_ETH_Q_SIZE>>6 104 105 106 static int cxgb_tx_coalesce_enable_start = COALESCE_START_DEFAULT; 107 SYSCTL_INT(_hw_cxgb, OID_AUTO, tx_coalesce_enable_start, CTLFLAG_RWTUN, 108 &cxgb_tx_coalesce_enable_start, 0, 109 "coalesce enable threshold"); 110 static int cxgb_tx_coalesce_enable_stop = COALESCE_STOP_DEFAULT; 111 SYSCTL_INT(_hw_cxgb, OID_AUTO, tx_coalesce_enable_stop, CTLFLAG_RWTUN, 112 &cxgb_tx_coalesce_enable_stop, 0, 113 "coalesce disable threshold"); 114 static int cxgb_tx_reclaim_threshold = TX_RECLAIM_DEFAULT; 115 SYSCTL_INT(_hw_cxgb, OID_AUTO, tx_reclaim_threshold, CTLFLAG_RWTUN, 116 &cxgb_tx_reclaim_threshold, 0, 117 "tx cleaning minimum threshold"); 118 119 /* 120 * XXX don't re-enable this until TOE stops assuming 121 * we have an m_ext 122 */ 123 static int recycle_enable = 0; 124 125 extern int cxgb_use_16k_clusters; 126 extern int nmbjumbop; 127 extern int nmbjumbo9; 128 extern int nmbjumbo16; 129 130 #define USE_GTS 0 131 132 #define SGE_RX_SM_BUF_SIZE 1536 133 #define SGE_RX_DROP_THRES 16 134 #define SGE_RX_COPY_THRES 128 135 136 /* 137 * Period of the Tx buffer reclaim timer. This timer does not need to run 138 * frequently as Tx buffers are usually reclaimed by new Tx packets. 139 */ 140 #define TX_RECLAIM_PERIOD (hz >> 1) 141 142 /* 143 * Values for sge_txq.flags 144 */ 145 enum { 146 TXQ_RUNNING = 1 << 0, /* fetch engine is running */ 147 TXQ_LAST_PKT_DB = 1 << 1, /* last packet rang the doorbell */ 148 }; 149 150 struct tx_desc { 151 uint64_t flit[TX_DESC_FLITS]; 152 } __packed; 153 154 struct rx_desc { 155 uint32_t addr_lo; 156 uint32_t len_gen; 157 uint32_t gen2; 158 uint32_t addr_hi; 159 } __packed; 160 161 struct rsp_desc { /* response queue descriptor */ 162 struct rss_header rss_hdr; 163 uint32_t flags; 164 uint32_t len_cq; 165 uint8_t imm_data[47]; 166 uint8_t intr_gen; 167 } __packed; 168 169 #define RX_SW_DESC_MAP_CREATED (1 << 0) 170 #define TX_SW_DESC_MAP_CREATED (1 << 1) 171 #define RX_SW_DESC_INUSE (1 << 3) 172 #define TX_SW_DESC_MAPPED (1 << 4) 173 174 #define RSPQ_NSOP_NEOP G_RSPD_SOP_EOP(0) 175 #define RSPQ_EOP G_RSPD_SOP_EOP(F_RSPD_EOP) 176 #define RSPQ_SOP G_RSPD_SOP_EOP(F_RSPD_SOP) 177 #define RSPQ_SOP_EOP G_RSPD_SOP_EOP(F_RSPD_SOP|F_RSPD_EOP) 178 179 struct tx_sw_desc { /* SW state per Tx descriptor */ 180 struct mbuf *m; 181 bus_dmamap_t map; 182 int flags; 183 }; 184 185 struct rx_sw_desc { /* SW state per Rx descriptor */ 186 caddr_t rxsd_cl; 187 struct mbuf *m; 188 bus_dmamap_t map; 189 int flags; 190 }; 191 192 struct txq_state { 193 unsigned int compl; 194 unsigned int gen; 195 unsigned int pidx; 196 }; 197 198 struct refill_fl_cb_arg { 199 int error; 200 bus_dma_segment_t seg; 201 int nseg; 202 }; 203 204 205 /* 206 * Maps a number of flits to the number of Tx descriptors that can hold them. 207 * The formula is 208 * 209 * desc = 1 + (flits - 2) / (WR_FLITS - 1). 210 * 211 * HW allows up to 4 descriptors to be combined into a WR. 212 */ 213 static uint8_t flit_desc_map[] = { 214 0, 215 #if SGE_NUM_GENBITS == 1 216 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 217 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 218 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 219 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4 220 #elif SGE_NUM_GENBITS == 2 221 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 222 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 223 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 224 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 225 #else 226 # error "SGE_NUM_GENBITS must be 1 or 2" 227 #endif 228 }; 229 230 #define TXQ_LOCK_ASSERT(qs) mtx_assert(&(qs)->lock, MA_OWNED) 231 #define TXQ_TRYLOCK(qs) mtx_trylock(&(qs)->lock) 232 #define TXQ_LOCK(qs) mtx_lock(&(qs)->lock) 233 #define TXQ_UNLOCK(qs) mtx_unlock(&(qs)->lock) 234 #define TXQ_RING_EMPTY(qs) drbr_empty((qs)->port->ifp, (qs)->txq[TXQ_ETH].txq_mr) 235 #define TXQ_RING_NEEDS_ENQUEUE(qs) \ 236 drbr_needs_enqueue((qs)->port->ifp, (qs)->txq[TXQ_ETH].txq_mr) 237 #define TXQ_RING_FLUSH(qs) drbr_flush((qs)->port->ifp, (qs)->txq[TXQ_ETH].txq_mr) 238 #define TXQ_RING_DEQUEUE_COND(qs, func, arg) \ 239 drbr_dequeue_cond((qs)->port->ifp, (qs)->txq[TXQ_ETH].txq_mr, func, arg) 240 #define TXQ_RING_DEQUEUE(qs) \ 241 drbr_dequeue((qs)->port->ifp, (qs)->txq[TXQ_ETH].txq_mr) 242 243 int cxgb_debug = 0; 244 245 static void sge_timer_cb(void *arg); 246 static void sge_timer_reclaim(void *arg, int ncount); 247 static void sge_txq_reclaim_handler(void *arg, int ncount); 248 static void cxgb_start_locked(struct sge_qset *qs); 249 250 /* 251 * XXX need to cope with bursty scheduling by looking at a wider 252 * window than we are now for determining the need for coalescing 253 * 254 */ 255 static __inline uint64_t 256 check_pkt_coalesce(struct sge_qset *qs) 257 { 258 struct adapter *sc; 259 struct sge_txq *txq; 260 uint8_t *fill; 261 262 if (__predict_false(cxgb_tx_coalesce_force)) 263 return (1); 264 txq = &qs->txq[TXQ_ETH]; 265 sc = qs->port->adapter; 266 fill = &sc->tunq_fill[qs->idx]; 267 268 if (cxgb_tx_coalesce_enable_start > COALESCE_START_MAX) 269 cxgb_tx_coalesce_enable_start = COALESCE_START_MAX; 270 if (cxgb_tx_coalesce_enable_stop < COALESCE_STOP_MIN) 271 cxgb_tx_coalesce_enable_start = COALESCE_STOP_MIN; 272 /* 273 * if the hardware transmit queue is more than 1/8 full 274 * we mark it as coalescing - we drop back from coalescing 275 * when we go below 1/32 full and there are no packets enqueued, 276 * this provides us with some degree of hysteresis 277 */ 278 if (*fill != 0 && (txq->in_use <= cxgb_tx_coalesce_enable_stop) && 279 TXQ_RING_EMPTY(qs) && (qs->coalescing == 0)) 280 *fill = 0; 281 else if (*fill == 0 && (txq->in_use >= cxgb_tx_coalesce_enable_start)) 282 *fill = 1; 283 284 return (sc->tunq_coalesce); 285 } 286 287 #ifdef __LP64__ 288 static void 289 set_wr_hdr(struct work_request_hdr *wrp, uint32_t wr_hi, uint32_t wr_lo) 290 { 291 uint64_t wr_hilo; 292 #if _BYTE_ORDER == _LITTLE_ENDIAN 293 wr_hilo = wr_hi; 294 wr_hilo |= (((uint64_t)wr_lo)<<32); 295 #else 296 wr_hilo = wr_lo; 297 wr_hilo |= (((uint64_t)wr_hi)<<32); 298 #endif 299 wrp->wrh_hilo = wr_hilo; 300 } 301 #else 302 static void 303 set_wr_hdr(struct work_request_hdr *wrp, uint32_t wr_hi, uint32_t wr_lo) 304 { 305 306 wrp->wrh_hi = wr_hi; 307 wmb(); 308 wrp->wrh_lo = wr_lo; 309 } 310 #endif 311 312 struct coalesce_info { 313 int count; 314 int nbytes; 315 int noncoal; 316 }; 317 318 static int 319 coalesce_check(struct mbuf *m, void *arg) 320 { 321 struct coalesce_info *ci = arg; 322 323 if ((m->m_next != NULL) || 324 ((mtod(m, vm_offset_t) & PAGE_MASK) + m->m_len > PAGE_SIZE)) 325 ci->noncoal = 1; 326 327 if ((ci->count == 0) || (ci->noncoal == 0 && (ci->count < 7) && 328 (ci->nbytes + m->m_len <= 10500))) { 329 ci->count++; 330 ci->nbytes += m->m_len; 331 return (1); 332 } 333 return (0); 334 } 335 336 static struct mbuf * 337 cxgb_dequeue(struct sge_qset *qs) 338 { 339 struct mbuf *m, *m_head, *m_tail; 340 struct coalesce_info ci; 341 342 343 if (check_pkt_coalesce(qs) == 0) 344 return TXQ_RING_DEQUEUE(qs); 345 346 m_head = m_tail = NULL; 347 ci.count = ci.nbytes = ci.noncoal = 0; 348 do { 349 m = TXQ_RING_DEQUEUE_COND(qs, coalesce_check, &ci); 350 if (m_head == NULL) { 351 m_tail = m_head = m; 352 } else if (m != NULL) { 353 m_tail->m_nextpkt = m; 354 m_tail = m; 355 } 356 } while (m != NULL); 357 if (ci.count > 7) 358 panic("trying to coalesce %d packets in to one WR", ci.count); 359 return (m_head); 360 } 361 362 /** 363 * reclaim_completed_tx - reclaims completed Tx descriptors 364 * @adapter: the adapter 365 * @q: the Tx queue to reclaim completed descriptors from 366 * 367 * Reclaims Tx descriptors that the SGE has indicated it has processed, 368 * and frees the associated buffers if possible. Called with the Tx 369 * queue's lock held. 370 */ 371 static __inline int 372 reclaim_completed_tx(struct sge_qset *qs, int reclaim_min, int queue) 373 { 374 struct sge_txq *q = &qs->txq[queue]; 375 int reclaim = desc_reclaimable(q); 376 377 if ((cxgb_tx_reclaim_threshold > TX_RECLAIM_MAX) || 378 (cxgb_tx_reclaim_threshold < TX_RECLAIM_MIN)) 379 cxgb_tx_reclaim_threshold = TX_RECLAIM_DEFAULT; 380 381 if (reclaim < reclaim_min) 382 return (0); 383 384 mtx_assert(&qs->lock, MA_OWNED); 385 if (reclaim > 0) { 386 t3_free_tx_desc(qs, reclaim, queue); 387 q->cleaned += reclaim; 388 q->in_use -= reclaim; 389 } 390 if (isset(&qs->txq_stopped, TXQ_ETH)) 391 clrbit(&qs->txq_stopped, TXQ_ETH); 392 393 return (reclaim); 394 } 395 396 #ifdef DEBUGNET 397 int 398 cxgb_debugnet_poll_tx(struct sge_qset *qs) 399 { 400 401 return (reclaim_completed_tx(qs, TX_RECLAIM_MAX, TXQ_ETH)); 402 } 403 #endif 404 405 /** 406 * should_restart_tx - are there enough resources to restart a Tx queue? 407 * @q: the Tx queue 408 * 409 * Checks if there are enough descriptors to restart a suspended Tx queue. 410 */ 411 static __inline int 412 should_restart_tx(const struct sge_txq *q) 413 { 414 unsigned int r = q->processed - q->cleaned; 415 416 return q->in_use - r < (q->size >> 1); 417 } 418 419 /** 420 * t3_sge_init - initialize SGE 421 * @adap: the adapter 422 * @p: the SGE parameters 423 * 424 * Performs SGE initialization needed every time after a chip reset. 425 * We do not initialize any of the queue sets here, instead the driver 426 * top-level must request those individually. We also do not enable DMA 427 * here, that should be done after the queues have been set up. 428 */ 429 void 430 t3_sge_init(adapter_t *adap, struct sge_params *p) 431 { 432 u_int ctrl, ups; 433 434 ups = 0; /* = ffs(pci_resource_len(adap->pdev, 2) >> 12); */ 435 436 ctrl = F_DROPPKT | V_PKTSHIFT(2) | F_FLMODE | F_AVOIDCQOVFL | 437 F_CQCRDTCTRL | F_CONGMODE | F_TNLFLMODE | F_FATLPERREN | 438 V_HOSTPAGESIZE(PAGE_SHIFT - 11) | F_BIGENDIANINGRESS | 439 V_USERSPACESIZE(ups ? ups - 1 : 0) | F_ISCSICOALESCING; 440 #if SGE_NUM_GENBITS == 1 441 ctrl |= F_EGRGENCTRL; 442 #endif 443 if (adap->params.rev > 0) { 444 if (!(adap->flags & (USING_MSIX | USING_MSI))) 445 ctrl |= F_ONEINTMULTQ | F_OPTONEINTMULTQ; 446 } 447 t3_write_reg(adap, A_SG_CONTROL, ctrl); 448 t3_write_reg(adap, A_SG_EGR_RCQ_DRB_THRSH, V_HIRCQDRBTHRSH(512) | 449 V_LORCQDRBTHRSH(512)); 450 t3_write_reg(adap, A_SG_TIMER_TICK, core_ticks_per_usec(adap) / 10); 451 t3_write_reg(adap, A_SG_CMDQ_CREDIT_TH, V_THRESHOLD(32) | 452 V_TIMEOUT(200 * core_ticks_per_usec(adap))); 453 t3_write_reg(adap, A_SG_HI_DRB_HI_THRSH, 454 adap->params.rev < T3_REV_C ? 1000 : 500); 455 t3_write_reg(adap, A_SG_HI_DRB_LO_THRSH, 256); 456 t3_write_reg(adap, A_SG_LO_DRB_HI_THRSH, 1000); 457 t3_write_reg(adap, A_SG_LO_DRB_LO_THRSH, 256); 458 t3_write_reg(adap, A_SG_OCO_BASE, V_BASE1(0xfff)); 459 t3_write_reg(adap, A_SG_DRB_PRI_THRESH, 63 * 1024); 460 } 461 462 463 /** 464 * sgl_len - calculates the size of an SGL of the given capacity 465 * @n: the number of SGL entries 466 * 467 * Calculates the number of flits needed for a scatter/gather list that 468 * can hold the given number of entries. 469 */ 470 static __inline unsigned int 471 sgl_len(unsigned int n) 472 { 473 return ((3 * n) / 2 + (n & 1)); 474 } 475 476 /** 477 * get_imm_packet - return the next ingress packet buffer from a response 478 * @resp: the response descriptor containing the packet data 479 * 480 * Return a packet containing the immediate data of the given response. 481 */ 482 static int 483 get_imm_packet(adapter_t *sc, const struct rsp_desc *resp, struct mbuf *m) 484 { 485 486 if (resp->rss_hdr.opcode == CPL_RX_DATA) { 487 const struct cpl_rx_data *cpl = (const void *)&resp->imm_data[0]; 488 m->m_len = sizeof(*cpl) + ntohs(cpl->len); 489 } else if (resp->rss_hdr.opcode == CPL_RX_PKT) { 490 const struct cpl_rx_pkt *cpl = (const void *)&resp->imm_data[0]; 491 m->m_len = sizeof(*cpl) + ntohs(cpl->len); 492 } else 493 m->m_len = IMMED_PKT_SIZE; 494 m->m_ext.ext_buf = NULL; 495 m->m_ext.ext_type = 0; 496 memcpy(mtod(m, uint8_t *), resp->imm_data, m->m_len); 497 return (0); 498 } 499 500 static __inline u_int 501 flits_to_desc(u_int n) 502 { 503 return (flit_desc_map[n]); 504 } 505 506 #define SGE_PARERR (F_CPPARITYERROR | F_OCPARITYERROR | F_RCPARITYERROR | \ 507 F_IRPARITYERROR | V_ITPARITYERROR(M_ITPARITYERROR) | \ 508 V_FLPARITYERROR(M_FLPARITYERROR) | F_LODRBPARITYERROR | \ 509 F_HIDRBPARITYERROR | F_LORCQPARITYERROR | \ 510 F_HIRCQPARITYERROR) 511 #define SGE_FRAMINGERR (F_UC_REQ_FRAMINGERROR | F_R_REQ_FRAMINGERROR) 512 #define SGE_FATALERR (SGE_PARERR | SGE_FRAMINGERR | F_RSPQCREDITOVERFOW | \ 513 F_RSPQDISABLED) 514 515 /** 516 * t3_sge_err_intr_handler - SGE async event interrupt handler 517 * @adapter: the adapter 518 * 519 * Interrupt handler for SGE asynchronous (non-data) events. 520 */ 521 void 522 t3_sge_err_intr_handler(adapter_t *adapter) 523 { 524 unsigned int v, status; 525 526 status = t3_read_reg(adapter, A_SG_INT_CAUSE); 527 if (status & SGE_PARERR) 528 CH_ALERT(adapter, "SGE parity error (0x%x)\n", 529 status & SGE_PARERR); 530 if (status & SGE_FRAMINGERR) 531 CH_ALERT(adapter, "SGE framing error (0x%x)\n", 532 status & SGE_FRAMINGERR); 533 if (status & F_RSPQCREDITOVERFOW) 534 CH_ALERT(adapter, "SGE response queue credit overflow\n"); 535 536 if (status & F_RSPQDISABLED) { 537 v = t3_read_reg(adapter, A_SG_RSPQ_FL_STATUS); 538 539 CH_ALERT(adapter, 540 "packet delivered to disabled response queue (0x%x)\n", 541 (v >> S_RSPQ0DISABLED) & 0xff); 542 } 543 544 t3_write_reg(adapter, A_SG_INT_CAUSE, status); 545 if (status & SGE_FATALERR) 546 t3_fatal_err(adapter); 547 } 548 549 void 550 t3_sge_prep(adapter_t *adap, struct sge_params *p) 551 { 552 int i, nqsets, fl_q_size, jumbo_q_size, use_16k, jumbo_buf_size; 553 554 nqsets = min(SGE_QSETS / adap->params.nports, mp_ncpus); 555 nqsets *= adap->params.nports; 556 557 fl_q_size = min(nmbclusters/(3*nqsets), FL_Q_SIZE); 558 559 while (!powerof2(fl_q_size)) 560 fl_q_size--; 561 562 use_16k = cxgb_use_16k_clusters != -1 ? cxgb_use_16k_clusters : 563 is_offload(adap); 564 565 if (use_16k) { 566 jumbo_q_size = min(nmbjumbo16/(3*nqsets), JUMBO_Q_SIZE); 567 jumbo_buf_size = MJUM16BYTES; 568 } else { 569 jumbo_q_size = min(nmbjumbo9/(3*nqsets), JUMBO_Q_SIZE); 570 jumbo_buf_size = MJUM9BYTES; 571 } 572 while (!powerof2(jumbo_q_size)) 573 jumbo_q_size--; 574 575 if (fl_q_size < (FL_Q_SIZE / 4) || jumbo_q_size < (JUMBO_Q_SIZE / 2)) 576 device_printf(adap->dev, 577 "Insufficient clusters and/or jumbo buffers.\n"); 578 579 p->max_pkt_size = jumbo_buf_size - sizeof(struct cpl_rx_data); 580 581 for (i = 0; i < SGE_QSETS; ++i) { 582 struct qset_params *q = p->qset + i; 583 584 if (adap->params.nports > 2) { 585 q->coalesce_usecs = 50; 586 } else { 587 #ifdef INVARIANTS 588 q->coalesce_usecs = 10; 589 #else 590 q->coalesce_usecs = 5; 591 #endif 592 } 593 q->polling = 0; 594 q->rspq_size = RSPQ_Q_SIZE; 595 q->fl_size = fl_q_size; 596 q->jumbo_size = jumbo_q_size; 597 q->jumbo_buf_size = jumbo_buf_size; 598 q->txq_size[TXQ_ETH] = TX_ETH_Q_SIZE; 599 q->txq_size[TXQ_OFLD] = is_offload(adap) ? TX_OFLD_Q_SIZE : 16; 600 q->txq_size[TXQ_CTRL] = TX_CTRL_Q_SIZE; 601 q->cong_thres = 0; 602 } 603 } 604 605 int 606 t3_sge_alloc(adapter_t *sc) 607 { 608 609 /* The parent tag. */ 610 if (bus_dma_tag_create( bus_get_dma_tag(sc->dev),/* PCI parent */ 611 1, 0, /* algnmnt, boundary */ 612 BUS_SPACE_MAXADDR, /* lowaddr */ 613 BUS_SPACE_MAXADDR, /* highaddr */ 614 NULL, NULL, /* filter, filterarg */ 615 BUS_SPACE_MAXSIZE_32BIT,/* maxsize */ 616 BUS_SPACE_UNRESTRICTED, /* nsegments */ 617 BUS_SPACE_MAXSIZE_32BIT,/* maxsegsize */ 618 0, /* flags */ 619 NULL, NULL, /* lock, lockarg */ 620 &sc->parent_dmat)) { 621 device_printf(sc->dev, "Cannot allocate parent DMA tag\n"); 622 return (ENOMEM); 623 } 624 625 /* 626 * DMA tag for normal sized RX frames 627 */ 628 if (bus_dma_tag_create(sc->parent_dmat, MCLBYTES, 0, BUS_SPACE_MAXADDR, 629 BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES, 1, 630 MCLBYTES, BUS_DMA_ALLOCNOW, NULL, NULL, &sc->rx_dmat)) { 631 device_printf(sc->dev, "Cannot allocate RX DMA tag\n"); 632 return (ENOMEM); 633 } 634 635 /* 636 * DMA tag for jumbo sized RX frames. 637 */ 638 if (bus_dma_tag_create(sc->parent_dmat, MJUM16BYTES, 0, BUS_SPACE_MAXADDR, 639 BUS_SPACE_MAXADDR, NULL, NULL, MJUM16BYTES, 1, MJUM16BYTES, 640 BUS_DMA_ALLOCNOW, NULL, NULL, &sc->rx_jumbo_dmat)) { 641 device_printf(sc->dev, "Cannot allocate RX jumbo DMA tag\n"); 642 return (ENOMEM); 643 } 644 645 /* 646 * DMA tag for TX frames. 647 */ 648 if (bus_dma_tag_create(sc->parent_dmat, 1, 0, BUS_SPACE_MAXADDR, 649 BUS_SPACE_MAXADDR, NULL, NULL, TX_MAX_SIZE, TX_MAX_SEGS, 650 TX_MAX_SIZE, BUS_DMA_ALLOCNOW, 651 NULL, NULL, &sc->tx_dmat)) { 652 device_printf(sc->dev, "Cannot allocate TX DMA tag\n"); 653 return (ENOMEM); 654 } 655 656 return (0); 657 } 658 659 int 660 t3_sge_free(struct adapter * sc) 661 { 662 663 if (sc->tx_dmat != NULL) 664 bus_dma_tag_destroy(sc->tx_dmat); 665 666 if (sc->rx_jumbo_dmat != NULL) 667 bus_dma_tag_destroy(sc->rx_jumbo_dmat); 668 669 if (sc->rx_dmat != NULL) 670 bus_dma_tag_destroy(sc->rx_dmat); 671 672 if (sc->parent_dmat != NULL) 673 bus_dma_tag_destroy(sc->parent_dmat); 674 675 return (0); 676 } 677 678 void 679 t3_update_qset_coalesce(struct sge_qset *qs, const struct qset_params *p) 680 { 681 682 qs->rspq.holdoff_tmr = max(p->coalesce_usecs * 10, 1U); 683 qs->rspq.polling = 0 /* p->polling */; 684 } 685 686 #if !defined(__i386__) && !defined(__amd64__) 687 static void 688 refill_fl_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 689 { 690 struct refill_fl_cb_arg *cb_arg = arg; 691 692 cb_arg->error = error; 693 cb_arg->seg = segs[0]; 694 cb_arg->nseg = nseg; 695 696 } 697 #endif 698 /** 699 * refill_fl - refill an SGE free-buffer list 700 * @sc: the controller softc 701 * @q: the free-list to refill 702 * @n: the number of new buffers to allocate 703 * 704 * (Re)populate an SGE free-buffer list with up to @n new packet buffers. 705 * The caller must assure that @n does not exceed the queue's capacity. 706 */ 707 static void 708 refill_fl(adapter_t *sc, struct sge_fl *q, int n) 709 { 710 struct rx_sw_desc *sd = &q->sdesc[q->pidx]; 711 struct rx_desc *d = &q->desc[q->pidx]; 712 struct refill_fl_cb_arg cb_arg; 713 struct mbuf *m; 714 caddr_t cl; 715 int err; 716 717 cb_arg.error = 0; 718 while (n--) { 719 /* 720 * We allocate an uninitialized mbuf + cluster, mbuf is 721 * initialized after rx. 722 */ 723 if (q->zone == zone_pack) { 724 if ((m = m_getcl(M_NOWAIT, MT_NOINIT, M_PKTHDR)) == NULL) 725 break; 726 cl = m->m_ext.ext_buf; 727 } else { 728 if ((cl = m_cljget(NULL, M_NOWAIT, q->buf_size)) == NULL) 729 break; 730 if ((m = m_gethdr_raw(M_NOWAIT, 0)) == NULL) { 731 uma_zfree(q->zone, cl); 732 break; 733 } 734 } 735 if ((sd->flags & RX_SW_DESC_MAP_CREATED) == 0) { 736 if ((err = bus_dmamap_create(q->entry_tag, 0, &sd->map))) { 737 log(LOG_WARNING, "bus_dmamap_create failed %d\n", err); 738 uma_zfree(q->zone, cl); 739 goto done; 740 } 741 sd->flags |= RX_SW_DESC_MAP_CREATED; 742 } 743 #if !defined(__i386__) && !defined(__amd64__) 744 err = bus_dmamap_load(q->entry_tag, sd->map, 745 cl, q->buf_size, refill_fl_cb, &cb_arg, 0); 746 747 if (err != 0 || cb_arg.error) { 748 if (q->zone != zone_pack) 749 uma_zfree(q->zone, cl); 750 m_free(m); 751 goto done; 752 } 753 #else 754 cb_arg.seg.ds_addr = pmap_kextract((vm_offset_t)cl); 755 #endif 756 sd->flags |= RX_SW_DESC_INUSE; 757 sd->rxsd_cl = cl; 758 sd->m = m; 759 d->addr_lo = htobe32(cb_arg.seg.ds_addr & 0xffffffff); 760 d->addr_hi = htobe32(((uint64_t)cb_arg.seg.ds_addr >>32) & 0xffffffff); 761 d->len_gen = htobe32(V_FLD_GEN1(q->gen)); 762 d->gen2 = htobe32(V_FLD_GEN2(q->gen)); 763 764 d++; 765 sd++; 766 767 if (++q->pidx == q->size) { 768 q->pidx = 0; 769 q->gen ^= 1; 770 sd = q->sdesc; 771 d = q->desc; 772 } 773 q->credits++; 774 q->db_pending++; 775 } 776 777 done: 778 if (q->db_pending >= 32) { 779 q->db_pending = 0; 780 t3_write_reg(sc, A_SG_KDOORBELL, V_EGRCNTX(q->cntxt_id)); 781 } 782 } 783 784 785 /** 786 * free_rx_bufs - free the Rx buffers on an SGE free list 787 * @sc: the controle softc 788 * @q: the SGE free list to clean up 789 * 790 * Release the buffers on an SGE free-buffer Rx queue. HW fetching from 791 * this queue should be stopped before calling this function. 792 */ 793 static void 794 free_rx_bufs(adapter_t *sc, struct sge_fl *q) 795 { 796 u_int cidx = q->cidx; 797 798 while (q->credits--) { 799 struct rx_sw_desc *d = &q->sdesc[cidx]; 800 801 if (d->flags & RX_SW_DESC_INUSE) { 802 bus_dmamap_unload(q->entry_tag, d->map); 803 bus_dmamap_destroy(q->entry_tag, d->map); 804 if (q->zone == zone_pack) { 805 m_init(d->m, M_NOWAIT, MT_DATA, M_EXT); 806 uma_zfree(zone_pack, d->m); 807 } else { 808 m_init(d->m, M_NOWAIT, MT_DATA, 0); 809 m_free_raw(d->m); 810 uma_zfree(q->zone, d->rxsd_cl); 811 } 812 } 813 814 d->rxsd_cl = NULL; 815 d->m = NULL; 816 if (++cidx == q->size) 817 cidx = 0; 818 } 819 } 820 821 static __inline void 822 __refill_fl(adapter_t *adap, struct sge_fl *fl) 823 { 824 refill_fl(adap, fl, min(16U, fl->size - fl->credits)); 825 } 826 827 static __inline void 828 __refill_fl_lt(adapter_t *adap, struct sge_fl *fl, int max) 829 { 830 uint32_t reclaimable = fl->size - fl->credits; 831 832 if (reclaimable > 0) 833 refill_fl(adap, fl, min(max, reclaimable)); 834 } 835 836 /** 837 * recycle_rx_buf - recycle a receive buffer 838 * @adapter: the adapter 839 * @q: the SGE free list 840 * @idx: index of buffer to recycle 841 * 842 * Recycles the specified buffer on the given free list by adding it at 843 * the next available slot on the list. 844 */ 845 static void 846 recycle_rx_buf(adapter_t *adap, struct sge_fl *q, unsigned int idx) 847 { 848 struct rx_desc *from = &q->desc[idx]; 849 struct rx_desc *to = &q->desc[q->pidx]; 850 851 q->sdesc[q->pidx] = q->sdesc[idx]; 852 to->addr_lo = from->addr_lo; // already big endian 853 to->addr_hi = from->addr_hi; // likewise 854 wmb(); /* necessary ? */ 855 to->len_gen = htobe32(V_FLD_GEN1(q->gen)); 856 to->gen2 = htobe32(V_FLD_GEN2(q->gen)); 857 q->credits++; 858 859 if (++q->pidx == q->size) { 860 q->pidx = 0; 861 q->gen ^= 1; 862 } 863 t3_write_reg(adap, A_SG_KDOORBELL, V_EGRCNTX(q->cntxt_id)); 864 } 865 866 static void 867 alloc_ring_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error) 868 { 869 uint32_t *addr; 870 871 addr = arg; 872 *addr = segs[0].ds_addr; 873 } 874 875 static int 876 alloc_ring(adapter_t *sc, size_t nelem, size_t elem_size, size_t sw_size, 877 bus_addr_t *phys, void *desc, void *sdesc, bus_dma_tag_t *tag, 878 bus_dmamap_t *map, bus_dma_tag_t parent_entry_tag, bus_dma_tag_t *entry_tag) 879 { 880 size_t len = nelem * elem_size; 881 void *s = NULL; 882 void *p = NULL; 883 int err; 884 885 if ((err = bus_dma_tag_create(sc->parent_dmat, PAGE_SIZE, 0, 886 BUS_SPACE_MAXADDR_32BIT, 887 BUS_SPACE_MAXADDR, NULL, NULL, len, 1, 888 len, 0, NULL, NULL, tag)) != 0) { 889 device_printf(sc->dev, "Cannot allocate descriptor tag\n"); 890 return (ENOMEM); 891 } 892 893 if ((err = bus_dmamem_alloc(*tag, (void **)&p, BUS_DMA_NOWAIT, 894 map)) != 0) { 895 device_printf(sc->dev, "Cannot allocate descriptor memory\n"); 896 return (ENOMEM); 897 } 898 899 bus_dmamap_load(*tag, *map, p, len, alloc_ring_cb, phys, 0); 900 bzero(p, len); 901 *(void **)desc = p; 902 903 if (sw_size) { 904 len = nelem * sw_size; 905 s = malloc(len, M_DEVBUF, M_WAITOK|M_ZERO); 906 *(void **)sdesc = s; 907 } 908 if (parent_entry_tag == NULL) 909 return (0); 910 911 if ((err = bus_dma_tag_create(parent_entry_tag, 1, 0, 912 BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, 913 NULL, NULL, TX_MAX_SIZE, TX_MAX_SEGS, 914 TX_MAX_SIZE, BUS_DMA_ALLOCNOW, 915 NULL, NULL, entry_tag)) != 0) { 916 device_printf(sc->dev, "Cannot allocate descriptor entry tag\n"); 917 return (ENOMEM); 918 } 919 return (0); 920 } 921 922 static void 923 sge_slow_intr_handler(void *arg, int ncount) 924 { 925 adapter_t *sc = arg; 926 927 t3_slow_intr_handler(sc); 928 t3_write_reg(sc, A_PL_INT_ENABLE0, sc->slow_intr_mask); 929 (void) t3_read_reg(sc, A_PL_INT_ENABLE0); 930 } 931 932 /** 933 * sge_timer_cb - perform periodic maintenance of an SGE qset 934 * @data: the SGE queue set to maintain 935 * 936 * Runs periodically from a timer to perform maintenance of an SGE queue 937 * set. It performs two tasks: 938 * 939 * a) Cleans up any completed Tx descriptors that may still be pending. 940 * Normal descriptor cleanup happens when new packets are added to a Tx 941 * queue so this timer is relatively infrequent and does any cleanup only 942 * if the Tx queue has not seen any new packets in a while. We make a 943 * best effort attempt to reclaim descriptors, in that we don't wait 944 * around if we cannot get a queue's lock (which most likely is because 945 * someone else is queueing new packets and so will also handle the clean 946 * up). Since control queues use immediate data exclusively we don't 947 * bother cleaning them up here. 948 * 949 * b) Replenishes Rx queues that have run out due to memory shortage. 950 * Normally new Rx buffers are added when existing ones are consumed but 951 * when out of memory a queue can become empty. We try to add only a few 952 * buffers here, the queue will be replenished fully as these new buffers 953 * are used up if memory shortage has subsided. 954 * 955 * c) Return coalesced response queue credits in case a response queue is 956 * starved. 957 * 958 * d) Ring doorbells for T304 tunnel queues since we have seen doorbell 959 * fifo overflows and the FW doesn't implement any recovery scheme yet. 960 */ 961 static void 962 sge_timer_cb(void *arg) 963 { 964 adapter_t *sc = arg; 965 if ((sc->flags & USING_MSIX) == 0) { 966 967 struct port_info *pi; 968 struct sge_qset *qs; 969 struct sge_txq *txq; 970 int i, j; 971 int reclaim_ofl, refill_rx; 972 973 if (sc->open_device_map == 0) 974 return; 975 976 for (i = 0; i < sc->params.nports; i++) { 977 pi = &sc->port[i]; 978 for (j = 0; j < pi->nqsets; j++) { 979 qs = &sc->sge.qs[pi->first_qset + j]; 980 txq = &qs->txq[0]; 981 reclaim_ofl = txq[TXQ_OFLD].processed - txq[TXQ_OFLD].cleaned; 982 refill_rx = ((qs->fl[0].credits < qs->fl[0].size) || 983 (qs->fl[1].credits < qs->fl[1].size)); 984 if (reclaim_ofl || refill_rx) { 985 taskqueue_enqueue(sc->tq, &pi->timer_reclaim_task); 986 break; 987 } 988 } 989 } 990 } 991 992 if (sc->params.nports > 2) { 993 int i; 994 995 for_each_port(sc, i) { 996 struct port_info *pi = &sc->port[i]; 997 998 t3_write_reg(sc, A_SG_KDOORBELL, 999 F_SELEGRCNTX | 1000 (FW_TUNNEL_SGEEC_START + pi->first_qset)); 1001 } 1002 } 1003 if (((sc->flags & USING_MSIX) == 0 || sc->params.nports > 2) && 1004 sc->open_device_map != 0) 1005 callout_reset(&sc->sge_timer_ch, TX_RECLAIM_PERIOD, sge_timer_cb, sc); 1006 } 1007 1008 /* 1009 * This is meant to be a catch-all function to keep sge state private 1010 * to sge.c 1011 * 1012 */ 1013 int 1014 t3_sge_init_adapter(adapter_t *sc) 1015 { 1016 callout_init(&sc->sge_timer_ch, 1); 1017 callout_reset(&sc->sge_timer_ch, TX_RECLAIM_PERIOD, sge_timer_cb, sc); 1018 TASK_INIT(&sc->slow_intr_task, 0, sge_slow_intr_handler, sc); 1019 return (0); 1020 } 1021 1022 int 1023 t3_sge_reset_adapter(adapter_t *sc) 1024 { 1025 callout_reset(&sc->sge_timer_ch, TX_RECLAIM_PERIOD, sge_timer_cb, sc); 1026 return (0); 1027 } 1028 1029 int 1030 t3_sge_init_port(struct port_info *pi) 1031 { 1032 TASK_INIT(&pi->timer_reclaim_task, 0, sge_timer_reclaim, pi); 1033 return (0); 1034 } 1035 1036 /** 1037 * refill_rspq - replenish an SGE response queue 1038 * @adapter: the adapter 1039 * @q: the response queue to replenish 1040 * @credits: how many new responses to make available 1041 * 1042 * Replenishes a response queue by making the supplied number of responses 1043 * available to HW. 1044 */ 1045 static __inline void 1046 refill_rspq(adapter_t *sc, const struct sge_rspq *q, u_int credits) 1047 { 1048 1049 /* mbufs are allocated on demand when a rspq entry is processed. */ 1050 t3_write_reg(sc, A_SG_RSPQ_CREDIT_RETURN, 1051 V_RSPQ(q->cntxt_id) | V_CREDITS(credits)); 1052 } 1053 1054 static void 1055 sge_txq_reclaim_handler(void *arg, int ncount) 1056 { 1057 struct sge_qset *qs = arg; 1058 int i; 1059 1060 for (i = 0; i < 3; i++) 1061 reclaim_completed_tx(qs, 16, i); 1062 } 1063 1064 static void 1065 sge_timer_reclaim(void *arg, int ncount) 1066 { 1067 struct port_info *pi = arg; 1068 int i, nqsets = pi->nqsets; 1069 adapter_t *sc = pi->adapter; 1070 struct sge_qset *qs; 1071 struct mtx *lock; 1072 1073 KASSERT((sc->flags & USING_MSIX) == 0, 1074 ("can't call timer reclaim for msi-x")); 1075 1076 for (i = 0; i < nqsets; i++) { 1077 qs = &sc->sge.qs[pi->first_qset + i]; 1078 1079 reclaim_completed_tx(qs, 16, TXQ_OFLD); 1080 lock = (sc->flags & USING_MSIX) ? &qs->rspq.lock : 1081 &sc->sge.qs[0].rspq.lock; 1082 1083 if (mtx_trylock(lock)) { 1084 /* XXX currently assume that we are *NOT* polling */ 1085 uint32_t status = t3_read_reg(sc, A_SG_RSPQ_FL_STATUS); 1086 1087 if (qs->fl[0].credits < qs->fl[0].size - 16) 1088 __refill_fl(sc, &qs->fl[0]); 1089 if (qs->fl[1].credits < qs->fl[1].size - 16) 1090 __refill_fl(sc, &qs->fl[1]); 1091 1092 if (status & (1 << qs->rspq.cntxt_id)) { 1093 if (qs->rspq.credits) { 1094 refill_rspq(sc, &qs->rspq, 1); 1095 qs->rspq.credits--; 1096 t3_write_reg(sc, A_SG_RSPQ_FL_STATUS, 1097 1 << qs->rspq.cntxt_id); 1098 } 1099 } 1100 mtx_unlock(lock); 1101 } 1102 } 1103 } 1104 1105 /** 1106 * init_qset_cntxt - initialize an SGE queue set context info 1107 * @qs: the queue set 1108 * @id: the queue set id 1109 * 1110 * Initializes the TIDs and context ids for the queues of a queue set. 1111 */ 1112 static void 1113 init_qset_cntxt(struct sge_qset *qs, u_int id) 1114 { 1115 1116 qs->rspq.cntxt_id = id; 1117 qs->fl[0].cntxt_id = 2 * id; 1118 qs->fl[1].cntxt_id = 2 * id + 1; 1119 qs->txq[TXQ_ETH].cntxt_id = FW_TUNNEL_SGEEC_START + id; 1120 qs->txq[TXQ_ETH].token = FW_TUNNEL_TID_START + id; 1121 qs->txq[TXQ_OFLD].cntxt_id = FW_OFLD_SGEEC_START + id; 1122 qs->txq[TXQ_CTRL].cntxt_id = FW_CTRL_SGEEC_START + id; 1123 qs->txq[TXQ_CTRL].token = FW_CTRL_TID_START + id; 1124 1125 /* XXX: a sane limit is needed instead of INT_MAX */ 1126 mbufq_init(&qs->txq[TXQ_ETH].sendq, INT_MAX); 1127 mbufq_init(&qs->txq[TXQ_OFLD].sendq, INT_MAX); 1128 mbufq_init(&qs->txq[TXQ_CTRL].sendq, INT_MAX); 1129 } 1130 1131 1132 static void 1133 txq_prod(struct sge_txq *txq, unsigned int ndesc, struct txq_state *txqs) 1134 { 1135 txq->in_use += ndesc; 1136 /* 1137 * XXX we don't handle stopping of queue 1138 * presumably start handles this when we bump against the end 1139 */ 1140 txqs->gen = txq->gen; 1141 txq->unacked += ndesc; 1142 txqs->compl = (txq->unacked & 32) << (S_WR_COMPL - 5); 1143 txq->unacked &= 31; 1144 txqs->pidx = txq->pidx; 1145 txq->pidx += ndesc; 1146 #ifdef INVARIANTS 1147 if (((txqs->pidx > txq->cidx) && 1148 (txq->pidx < txqs->pidx) && 1149 (txq->pidx >= txq->cidx)) || 1150 ((txqs->pidx < txq->cidx) && 1151 (txq->pidx >= txq-> cidx)) || 1152 ((txqs->pidx < txq->cidx) && 1153 (txq->cidx < txqs->pidx))) 1154 panic("txqs->pidx=%d txq->pidx=%d txq->cidx=%d", 1155 txqs->pidx, txq->pidx, txq->cidx); 1156 #endif 1157 if (txq->pidx >= txq->size) { 1158 txq->pidx -= txq->size; 1159 txq->gen ^= 1; 1160 } 1161 1162 } 1163 1164 /** 1165 * calc_tx_descs - calculate the number of Tx descriptors for a packet 1166 * @m: the packet mbufs 1167 * @nsegs: the number of segments 1168 * 1169 * Returns the number of Tx descriptors needed for the given Ethernet 1170 * packet. Ethernet packets require addition of WR and CPL headers. 1171 */ 1172 static __inline unsigned int 1173 calc_tx_descs(const struct mbuf *m, int nsegs) 1174 { 1175 unsigned int flits; 1176 1177 if (m->m_pkthdr.len <= PIO_LEN) 1178 return 1; 1179 1180 flits = sgl_len(nsegs) + 2; 1181 if (m->m_pkthdr.csum_flags & CSUM_TSO) 1182 flits++; 1183 1184 return flits_to_desc(flits); 1185 } 1186 1187 /** 1188 * make_sgl - populate a scatter/gather list for a packet 1189 * @sgp: the SGL to populate 1190 * @segs: the packet dma segments 1191 * @nsegs: the number of segments 1192 * 1193 * Generates a scatter/gather list for the buffers that make up a packet 1194 * and returns the SGL size in 8-byte words. The caller must size the SGL 1195 * appropriately. 1196 */ 1197 static __inline void 1198 make_sgl(struct sg_ent *sgp, bus_dma_segment_t *segs, int nsegs) 1199 { 1200 int i, idx; 1201 1202 for (idx = 0, i = 0; i < nsegs; i++) { 1203 /* 1204 * firmware doesn't like empty segments 1205 */ 1206 if (segs[i].ds_len == 0) 1207 continue; 1208 if (i && idx == 0) 1209 ++sgp; 1210 1211 sgp->len[idx] = htobe32(segs[i].ds_len); 1212 sgp->addr[idx] = htobe64(segs[i].ds_addr); 1213 idx ^= 1; 1214 } 1215 1216 if (idx) { 1217 sgp->len[idx] = 0; 1218 sgp->addr[idx] = 0; 1219 } 1220 } 1221 1222 /** 1223 * check_ring_tx_db - check and potentially ring a Tx queue's doorbell 1224 * @adap: the adapter 1225 * @q: the Tx queue 1226 * 1227 * Ring the doorbell if a Tx queue is asleep. There is a natural race, 1228 * where the HW is going to sleep just after we checked, however, 1229 * then the interrupt handler will detect the outstanding TX packet 1230 * and ring the doorbell for us. 1231 * 1232 * When GTS is disabled we unconditionally ring the doorbell. 1233 */ 1234 static __inline void 1235 check_ring_tx_db(adapter_t *adap, struct sge_txq *q, int mustring) 1236 { 1237 #if USE_GTS 1238 clear_bit(TXQ_LAST_PKT_DB, &q->flags); 1239 if (test_and_set_bit(TXQ_RUNNING, &q->flags) == 0) { 1240 set_bit(TXQ_LAST_PKT_DB, &q->flags); 1241 #ifdef T3_TRACE 1242 T3_TRACE1(adap->tb[q->cntxt_id & 7], "doorbell Tx, cntxt %d", 1243 q->cntxt_id); 1244 #endif 1245 t3_write_reg(adap, A_SG_KDOORBELL, 1246 F_SELEGRCNTX | V_EGRCNTX(q->cntxt_id)); 1247 } 1248 #else 1249 if (mustring || ++q->db_pending >= 32) { 1250 wmb(); /* write descriptors before telling HW */ 1251 t3_write_reg(adap, A_SG_KDOORBELL, 1252 F_SELEGRCNTX | V_EGRCNTX(q->cntxt_id)); 1253 q->db_pending = 0; 1254 } 1255 #endif 1256 } 1257 1258 static __inline void 1259 wr_gen2(struct tx_desc *d, unsigned int gen) 1260 { 1261 #if SGE_NUM_GENBITS == 2 1262 d->flit[TX_DESC_FLITS - 1] = htobe64(gen); 1263 #endif 1264 } 1265 1266 /** 1267 * write_wr_hdr_sgl - write a WR header and, optionally, SGL 1268 * @ndesc: number of Tx descriptors spanned by the SGL 1269 * @txd: first Tx descriptor to be written 1270 * @txqs: txq state (generation and producer index) 1271 * @txq: the SGE Tx queue 1272 * @sgl: the SGL 1273 * @flits: number of flits to the start of the SGL in the first descriptor 1274 * @sgl_flits: the SGL size in flits 1275 * @wr_hi: top 32 bits of WR header based on WR type (big endian) 1276 * @wr_lo: low 32 bits of WR header based on WR type (big endian) 1277 * 1278 * Write a work request header and an associated SGL. If the SGL is 1279 * small enough to fit into one Tx descriptor it has already been written 1280 * and we just need to write the WR header. Otherwise we distribute the 1281 * SGL across the number of descriptors it spans. 1282 */ 1283 static void 1284 write_wr_hdr_sgl(unsigned int ndesc, struct tx_desc *txd, struct txq_state *txqs, 1285 const struct sge_txq *txq, const struct sg_ent *sgl, unsigned int flits, 1286 unsigned int sgl_flits, unsigned int wr_hi, unsigned int wr_lo) 1287 { 1288 1289 struct work_request_hdr *wrp = (struct work_request_hdr *)txd; 1290 struct tx_sw_desc *txsd = &txq->sdesc[txqs->pidx]; 1291 1292 if (__predict_true(ndesc == 1)) { 1293 set_wr_hdr(wrp, htonl(F_WR_SOP | F_WR_EOP | V_WR_DATATYPE(1) | 1294 V_WR_SGLSFLT(flits)) | wr_hi, 1295 htonl(V_WR_LEN(flits + sgl_flits) | V_WR_GEN(txqs->gen)) | 1296 wr_lo); 1297 1298 wr_gen2(txd, txqs->gen); 1299 1300 } else { 1301 unsigned int ogen = txqs->gen; 1302 const uint64_t *fp = (const uint64_t *)sgl; 1303 struct work_request_hdr *wp = wrp; 1304 1305 wrp->wrh_hi = htonl(F_WR_SOP | V_WR_DATATYPE(1) | 1306 V_WR_SGLSFLT(flits)) | wr_hi; 1307 1308 while (sgl_flits) { 1309 unsigned int avail = WR_FLITS - flits; 1310 1311 if (avail > sgl_flits) 1312 avail = sgl_flits; 1313 memcpy(&txd->flit[flits], fp, avail * sizeof(*fp)); 1314 sgl_flits -= avail; 1315 ndesc--; 1316 if (!sgl_flits) 1317 break; 1318 1319 fp += avail; 1320 txd++; 1321 txsd++; 1322 if (++txqs->pidx == txq->size) { 1323 txqs->pidx = 0; 1324 txqs->gen ^= 1; 1325 txd = txq->desc; 1326 txsd = txq->sdesc; 1327 } 1328 1329 /* 1330 * when the head of the mbuf chain 1331 * is freed all clusters will be freed 1332 * with it 1333 */ 1334 wrp = (struct work_request_hdr *)txd; 1335 wrp->wrh_hi = htonl(V_WR_DATATYPE(1) | 1336 V_WR_SGLSFLT(1)) | wr_hi; 1337 wrp->wrh_lo = htonl(V_WR_LEN(min(WR_FLITS, 1338 sgl_flits + 1)) | 1339 V_WR_GEN(txqs->gen)) | wr_lo; 1340 wr_gen2(txd, txqs->gen); 1341 flits = 1; 1342 } 1343 wrp->wrh_hi |= htonl(F_WR_EOP); 1344 wmb(); 1345 wp->wrh_lo = htonl(V_WR_LEN(WR_FLITS) | V_WR_GEN(ogen)) | wr_lo; 1346 wr_gen2((struct tx_desc *)wp, ogen); 1347 } 1348 } 1349 1350 /* sizeof(*eh) + sizeof(*ip) + sizeof(*tcp) */ 1351 #define TCPPKTHDRSIZE (ETHER_HDR_LEN + 20 + 20) 1352 1353 #define GET_VTAG(cntrl, m) \ 1354 do { \ 1355 if ((m)->m_flags & M_VLANTAG) \ 1356 cntrl |= F_TXPKT_VLAN_VLD | V_TXPKT_VLAN((m)->m_pkthdr.ether_vtag); \ 1357 } while (0) 1358 1359 static int 1360 t3_encap(struct sge_qset *qs, struct mbuf **m) 1361 { 1362 adapter_t *sc; 1363 struct mbuf *m0; 1364 struct sge_txq *txq; 1365 struct txq_state txqs; 1366 struct port_info *pi; 1367 unsigned int ndesc, flits, cntrl, mlen; 1368 int err, nsegs, tso_info = 0; 1369 1370 struct work_request_hdr *wrp; 1371 struct tx_sw_desc *txsd; 1372 struct sg_ent *sgp, *sgl; 1373 uint32_t wr_hi, wr_lo, sgl_flits; 1374 bus_dma_segment_t segs[TX_MAX_SEGS]; 1375 1376 struct tx_desc *txd; 1377 1378 pi = qs->port; 1379 sc = pi->adapter; 1380 txq = &qs->txq[TXQ_ETH]; 1381 txd = &txq->desc[txq->pidx]; 1382 txsd = &txq->sdesc[txq->pidx]; 1383 sgl = txq->txq_sgl; 1384 1385 prefetch(txd); 1386 m0 = *m; 1387 1388 mtx_assert(&qs->lock, MA_OWNED); 1389 cntrl = V_TXPKT_INTF(pi->txpkt_intf); 1390 KASSERT(m0->m_flags & M_PKTHDR, ("not packet header\n")); 1391 1392 if (m0->m_nextpkt == NULL && m0->m_next != NULL && 1393 m0->m_pkthdr.csum_flags & (CSUM_TSO)) 1394 tso_info = V_LSO_MSS(m0->m_pkthdr.tso_segsz); 1395 1396 if (m0->m_nextpkt != NULL) { 1397 busdma_map_sg_vec(txq->entry_tag, txsd->map, m0, segs, &nsegs); 1398 ndesc = 1; 1399 mlen = 0; 1400 } else { 1401 if ((err = busdma_map_sg_collapse(txq->entry_tag, txsd->map, 1402 &m0, segs, &nsegs))) { 1403 if (cxgb_debug) 1404 printf("failed ... err=%d\n", err); 1405 return (err); 1406 } 1407 mlen = m0->m_pkthdr.len; 1408 ndesc = calc_tx_descs(m0, nsegs); 1409 } 1410 txq_prod(txq, ndesc, &txqs); 1411 1412 KASSERT(m0->m_pkthdr.len, ("empty packet nsegs=%d", nsegs)); 1413 txsd->m = m0; 1414 1415 if (m0->m_nextpkt != NULL) { 1416 struct cpl_tx_pkt_batch *cpl_batch = (struct cpl_tx_pkt_batch *)txd; 1417 int i, fidx; 1418 1419 if (nsegs > 7) 1420 panic("trying to coalesce %d packets in to one WR", nsegs); 1421 txq->txq_coalesced += nsegs; 1422 wrp = (struct work_request_hdr *)txd; 1423 flits = nsegs*2 + 1; 1424 1425 for (fidx = 1, i = 0; i < nsegs; i++, fidx += 2) { 1426 struct cpl_tx_pkt_batch_entry *cbe; 1427 uint64_t flit; 1428 uint32_t *hflit = (uint32_t *)&flit; 1429 int cflags = m0->m_pkthdr.csum_flags; 1430 1431 cntrl = V_TXPKT_INTF(pi->txpkt_intf); 1432 GET_VTAG(cntrl, m0); 1433 cntrl |= V_TXPKT_OPCODE(CPL_TX_PKT); 1434 if (__predict_false(!(cflags & CSUM_IP))) 1435 cntrl |= F_TXPKT_IPCSUM_DIS; 1436 if (__predict_false(!(cflags & (CSUM_TCP | CSUM_UDP | 1437 CSUM_UDP_IPV6 | CSUM_TCP_IPV6)))) 1438 cntrl |= F_TXPKT_L4CSUM_DIS; 1439 1440 hflit[0] = htonl(cntrl); 1441 hflit[1] = htonl(segs[i].ds_len | 0x80000000); 1442 flit |= htobe64(1 << 24); 1443 cbe = &cpl_batch->pkt_entry[i]; 1444 cbe->cntrl = hflit[0]; 1445 cbe->len = hflit[1]; 1446 cbe->addr = htobe64(segs[i].ds_addr); 1447 } 1448 1449 wr_hi = htonl(F_WR_SOP | F_WR_EOP | V_WR_DATATYPE(1) | 1450 V_WR_SGLSFLT(flits)) | 1451 htonl(V_WR_OP(FW_WROPCODE_TUNNEL_TX_PKT) | txqs.compl); 1452 wr_lo = htonl(V_WR_LEN(flits) | 1453 V_WR_GEN(txqs.gen)) | htonl(V_WR_TID(txq->token)); 1454 set_wr_hdr(wrp, wr_hi, wr_lo); 1455 wmb(); 1456 ETHER_BPF_MTAP(pi->ifp, m0); 1457 wr_gen2(txd, txqs.gen); 1458 check_ring_tx_db(sc, txq, 0); 1459 return (0); 1460 } else if (tso_info) { 1461 uint16_t eth_type; 1462 struct cpl_tx_pkt_lso *hdr = (struct cpl_tx_pkt_lso *)txd; 1463 struct ether_header *eh; 1464 void *l3hdr; 1465 struct tcphdr *tcp; 1466 1467 txd->flit[2] = 0; 1468 GET_VTAG(cntrl, m0); 1469 cntrl |= V_TXPKT_OPCODE(CPL_TX_PKT_LSO); 1470 hdr->cntrl = htonl(cntrl); 1471 hdr->len = htonl(mlen | 0x80000000); 1472 1473 if (__predict_false(mlen < TCPPKTHDRSIZE)) { 1474 printf("mbuf=%p,len=%d,tso_segsz=%d,csum_flags=%b,flags=%#x", 1475 m0, mlen, m0->m_pkthdr.tso_segsz, 1476 (int)m0->m_pkthdr.csum_flags, CSUM_BITS, m0->m_flags); 1477 panic("tx tso packet too small"); 1478 } 1479 1480 /* Make sure that ether, ip, tcp headers are all in m0 */ 1481 if (__predict_false(m0->m_len < TCPPKTHDRSIZE)) { 1482 m0 = m_pullup(m0, TCPPKTHDRSIZE); 1483 if (__predict_false(m0 == NULL)) { 1484 /* XXX panic probably an overreaction */ 1485 panic("couldn't fit header into mbuf"); 1486 } 1487 } 1488 1489 eh = mtod(m0, struct ether_header *); 1490 eth_type = eh->ether_type; 1491 if (eth_type == htons(ETHERTYPE_VLAN)) { 1492 struct ether_vlan_header *evh = (void *)eh; 1493 1494 tso_info |= V_LSO_ETH_TYPE(CPL_ETH_II_VLAN); 1495 l3hdr = evh + 1; 1496 eth_type = evh->evl_proto; 1497 } else { 1498 tso_info |= V_LSO_ETH_TYPE(CPL_ETH_II); 1499 l3hdr = eh + 1; 1500 } 1501 1502 if (eth_type == htons(ETHERTYPE_IP)) { 1503 struct ip *ip = l3hdr; 1504 1505 tso_info |= V_LSO_IPHDR_WORDS(ip->ip_hl); 1506 tcp = (struct tcphdr *)(ip + 1); 1507 } else if (eth_type == htons(ETHERTYPE_IPV6)) { 1508 struct ip6_hdr *ip6 = l3hdr; 1509 1510 KASSERT(ip6->ip6_nxt == IPPROTO_TCP, 1511 ("%s: CSUM_TSO with ip6_nxt %d", 1512 __func__, ip6->ip6_nxt)); 1513 1514 tso_info |= F_LSO_IPV6; 1515 tso_info |= V_LSO_IPHDR_WORDS(sizeof(*ip6) >> 2); 1516 tcp = (struct tcphdr *)(ip6 + 1); 1517 } else 1518 panic("%s: CSUM_TSO but neither ip nor ip6", __func__); 1519 1520 tso_info |= V_LSO_TCPHDR_WORDS(tcp->th_off); 1521 hdr->lso_info = htonl(tso_info); 1522 1523 if (__predict_false(mlen <= PIO_LEN)) { 1524 /* 1525 * pkt not undersized but fits in PIO_LEN 1526 * Indicates a TSO bug at the higher levels. 1527 */ 1528 txsd->m = NULL; 1529 m_copydata(m0, 0, mlen, (caddr_t)&txd->flit[3]); 1530 flits = (mlen + 7) / 8 + 3; 1531 wr_hi = htonl(V_WR_BCNTLFLT(mlen & 7) | 1532 V_WR_OP(FW_WROPCODE_TUNNEL_TX_PKT) | 1533 F_WR_SOP | F_WR_EOP | txqs.compl); 1534 wr_lo = htonl(V_WR_LEN(flits) | 1535 V_WR_GEN(txqs.gen) | V_WR_TID(txq->token)); 1536 set_wr_hdr(&hdr->wr, wr_hi, wr_lo); 1537 wmb(); 1538 ETHER_BPF_MTAP(pi->ifp, m0); 1539 wr_gen2(txd, txqs.gen); 1540 check_ring_tx_db(sc, txq, 0); 1541 m_freem(m0); 1542 return (0); 1543 } 1544 flits = 3; 1545 } else { 1546 struct cpl_tx_pkt *cpl = (struct cpl_tx_pkt *)txd; 1547 1548 GET_VTAG(cntrl, m0); 1549 cntrl |= V_TXPKT_OPCODE(CPL_TX_PKT); 1550 if (__predict_false(!(m0->m_pkthdr.csum_flags & CSUM_IP))) 1551 cntrl |= F_TXPKT_IPCSUM_DIS; 1552 if (__predict_false(!(m0->m_pkthdr.csum_flags & (CSUM_TCP | 1553 CSUM_UDP | CSUM_UDP_IPV6 | CSUM_TCP_IPV6)))) 1554 cntrl |= F_TXPKT_L4CSUM_DIS; 1555 cpl->cntrl = htonl(cntrl); 1556 cpl->len = htonl(mlen | 0x80000000); 1557 1558 if (mlen <= PIO_LEN) { 1559 txsd->m = NULL; 1560 m_copydata(m0, 0, mlen, (caddr_t)&txd->flit[2]); 1561 flits = (mlen + 7) / 8 + 2; 1562 1563 wr_hi = htonl(V_WR_BCNTLFLT(mlen & 7) | 1564 V_WR_OP(FW_WROPCODE_TUNNEL_TX_PKT) | 1565 F_WR_SOP | F_WR_EOP | txqs.compl); 1566 wr_lo = htonl(V_WR_LEN(flits) | 1567 V_WR_GEN(txqs.gen) | V_WR_TID(txq->token)); 1568 set_wr_hdr(&cpl->wr, wr_hi, wr_lo); 1569 wmb(); 1570 ETHER_BPF_MTAP(pi->ifp, m0); 1571 wr_gen2(txd, txqs.gen); 1572 check_ring_tx_db(sc, txq, 0); 1573 m_freem(m0); 1574 return (0); 1575 } 1576 flits = 2; 1577 } 1578 wrp = (struct work_request_hdr *)txd; 1579 sgp = (ndesc == 1) ? (struct sg_ent *)&txd->flit[flits] : sgl; 1580 make_sgl(sgp, segs, nsegs); 1581 1582 sgl_flits = sgl_len(nsegs); 1583 1584 ETHER_BPF_MTAP(pi->ifp, m0); 1585 1586 KASSERT(ndesc <= 4, ("ndesc too large %d", ndesc)); 1587 wr_hi = htonl(V_WR_OP(FW_WROPCODE_TUNNEL_TX_PKT) | txqs.compl); 1588 wr_lo = htonl(V_WR_TID(txq->token)); 1589 write_wr_hdr_sgl(ndesc, txd, &txqs, txq, sgl, flits, 1590 sgl_flits, wr_hi, wr_lo); 1591 check_ring_tx_db(sc, txq, 0); 1592 1593 return (0); 1594 } 1595 1596 #ifdef DEBUGNET 1597 int 1598 cxgb_debugnet_encap(struct sge_qset *qs, struct mbuf **m) 1599 { 1600 int error; 1601 1602 error = t3_encap(qs, m); 1603 if (error == 0) 1604 check_ring_tx_db(qs->port->adapter, &qs->txq[TXQ_ETH], 1); 1605 else if (*m != NULL) { 1606 m_freem(*m); 1607 *m = NULL; 1608 } 1609 return (error); 1610 } 1611 #endif 1612 1613 void 1614 cxgb_tx_watchdog(void *arg) 1615 { 1616 struct sge_qset *qs = arg; 1617 struct sge_txq *txq = &qs->txq[TXQ_ETH]; 1618 1619 if (qs->coalescing != 0 && 1620 (txq->in_use <= cxgb_tx_coalesce_enable_stop) && 1621 TXQ_RING_EMPTY(qs)) 1622 qs->coalescing = 0; 1623 else if (qs->coalescing == 0 && 1624 (txq->in_use >= cxgb_tx_coalesce_enable_start)) 1625 qs->coalescing = 1; 1626 if (TXQ_TRYLOCK(qs)) { 1627 qs->qs_flags |= QS_FLUSHING; 1628 cxgb_start_locked(qs); 1629 qs->qs_flags &= ~QS_FLUSHING; 1630 TXQ_UNLOCK(qs); 1631 } 1632 if (qs->port->ifp->if_drv_flags & IFF_DRV_RUNNING) 1633 callout_reset_on(&txq->txq_watchdog, hz/4, cxgb_tx_watchdog, 1634 qs, txq->txq_watchdog.c_cpu); 1635 } 1636 1637 static void 1638 cxgb_tx_timeout(void *arg) 1639 { 1640 struct sge_qset *qs = arg; 1641 struct sge_txq *txq = &qs->txq[TXQ_ETH]; 1642 1643 if (qs->coalescing == 0 && (txq->in_use >= (txq->size>>3))) 1644 qs->coalescing = 1; 1645 if (TXQ_TRYLOCK(qs)) { 1646 qs->qs_flags |= QS_TIMEOUT; 1647 cxgb_start_locked(qs); 1648 qs->qs_flags &= ~QS_TIMEOUT; 1649 TXQ_UNLOCK(qs); 1650 } 1651 } 1652 1653 static void 1654 cxgb_start_locked(struct sge_qset *qs) 1655 { 1656 struct mbuf *m_head = NULL; 1657 struct sge_txq *txq = &qs->txq[TXQ_ETH]; 1658 struct port_info *pi = qs->port; 1659 struct ifnet *ifp = pi->ifp; 1660 1661 if (qs->qs_flags & (QS_FLUSHING|QS_TIMEOUT)) 1662 reclaim_completed_tx(qs, 0, TXQ_ETH); 1663 1664 if (!pi->link_config.link_ok) { 1665 TXQ_RING_FLUSH(qs); 1666 return; 1667 } 1668 TXQ_LOCK_ASSERT(qs); 1669 while (!TXQ_RING_EMPTY(qs) && (ifp->if_drv_flags & IFF_DRV_RUNNING) && 1670 pi->link_config.link_ok) { 1671 reclaim_completed_tx(qs, cxgb_tx_reclaim_threshold, TXQ_ETH); 1672 1673 if (txq->size - txq->in_use <= TX_MAX_DESC) 1674 break; 1675 1676 if ((m_head = cxgb_dequeue(qs)) == NULL) 1677 break; 1678 /* 1679 * Encapsulation can modify our pointer, and or make it 1680 * NULL on failure. In that event, we can't requeue. 1681 */ 1682 if (t3_encap(qs, &m_head) || m_head == NULL) 1683 break; 1684 1685 m_head = NULL; 1686 } 1687 1688 if (txq->db_pending) 1689 check_ring_tx_db(pi->adapter, txq, 1); 1690 1691 if (!TXQ_RING_EMPTY(qs) && callout_pending(&txq->txq_timer) == 0 && 1692 pi->link_config.link_ok) 1693 callout_reset_on(&txq->txq_timer, 1, cxgb_tx_timeout, 1694 qs, txq->txq_timer.c_cpu); 1695 if (m_head != NULL) 1696 m_freem(m_head); 1697 } 1698 1699 static int 1700 cxgb_transmit_locked(struct ifnet *ifp, struct sge_qset *qs, struct mbuf *m) 1701 { 1702 struct port_info *pi = qs->port; 1703 struct sge_txq *txq = &qs->txq[TXQ_ETH]; 1704 struct buf_ring *br = txq->txq_mr; 1705 int error, avail; 1706 1707 avail = txq->size - txq->in_use; 1708 TXQ_LOCK_ASSERT(qs); 1709 1710 /* 1711 * We can only do a direct transmit if the following are true: 1712 * - we aren't coalescing (ring < 3/4 full) 1713 * - the link is up -- checked in caller 1714 * - there are no packets enqueued already 1715 * - there is space in hardware transmit queue 1716 */ 1717 if (check_pkt_coalesce(qs) == 0 && 1718 !TXQ_RING_NEEDS_ENQUEUE(qs) && avail > TX_MAX_DESC) { 1719 if (t3_encap(qs, &m)) { 1720 if (m != NULL && 1721 (error = drbr_enqueue(ifp, br, m)) != 0) 1722 return (error); 1723 } else { 1724 if (txq->db_pending) 1725 check_ring_tx_db(pi->adapter, txq, 1); 1726 1727 /* 1728 * We've bypassed the buf ring so we need to update 1729 * the stats directly 1730 */ 1731 txq->txq_direct_packets++; 1732 txq->txq_direct_bytes += m->m_pkthdr.len; 1733 } 1734 } else if ((error = drbr_enqueue(ifp, br, m)) != 0) 1735 return (error); 1736 1737 reclaim_completed_tx(qs, cxgb_tx_reclaim_threshold, TXQ_ETH); 1738 if (!TXQ_RING_EMPTY(qs) && pi->link_config.link_ok && 1739 (!check_pkt_coalesce(qs) || (drbr_inuse(ifp, br) >= 7))) 1740 cxgb_start_locked(qs); 1741 else if (!TXQ_RING_EMPTY(qs) && !callout_pending(&txq->txq_timer)) 1742 callout_reset_on(&txq->txq_timer, 1, cxgb_tx_timeout, 1743 qs, txq->txq_timer.c_cpu); 1744 return (0); 1745 } 1746 1747 int 1748 cxgb_transmit(struct ifnet *ifp, struct mbuf *m) 1749 { 1750 struct sge_qset *qs; 1751 struct port_info *pi = ifp->if_softc; 1752 int error, qidx = pi->first_qset; 1753 1754 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 1755 ||(!pi->link_config.link_ok)) { 1756 m_freem(m); 1757 return (0); 1758 } 1759 1760 /* check if flowid is set */ 1761 if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) 1762 qidx = (m->m_pkthdr.flowid % pi->nqsets) + pi->first_qset; 1763 1764 qs = &pi->adapter->sge.qs[qidx]; 1765 1766 if (TXQ_TRYLOCK(qs)) { 1767 /* XXX running */ 1768 error = cxgb_transmit_locked(ifp, qs, m); 1769 TXQ_UNLOCK(qs); 1770 } else 1771 error = drbr_enqueue(ifp, qs->txq[TXQ_ETH].txq_mr, m); 1772 return (error); 1773 } 1774 1775 void 1776 cxgb_qflush(struct ifnet *ifp) 1777 { 1778 /* 1779 * flush any enqueued mbufs in the buf_rings 1780 * and in the transmit queues 1781 * no-op for now 1782 */ 1783 return; 1784 } 1785 1786 /** 1787 * write_imm - write a packet into a Tx descriptor as immediate data 1788 * @d: the Tx descriptor to write 1789 * @m: the packet 1790 * @len: the length of packet data to write as immediate data 1791 * @gen: the generation bit value to write 1792 * 1793 * Writes a packet as immediate data into a Tx descriptor. The packet 1794 * contains a work request at its beginning. We must write the packet 1795 * carefully so the SGE doesn't read accidentally before it's written in 1796 * its entirety. 1797 */ 1798 static __inline void 1799 write_imm(struct tx_desc *d, caddr_t src, 1800 unsigned int len, unsigned int gen) 1801 { 1802 struct work_request_hdr *from = (struct work_request_hdr *)src; 1803 struct work_request_hdr *to = (struct work_request_hdr *)d; 1804 uint32_t wr_hi, wr_lo; 1805 1806 KASSERT(len <= WR_LEN && len >= sizeof(*from), 1807 ("%s: invalid len %d", __func__, len)); 1808 1809 memcpy(&to[1], &from[1], len - sizeof(*from)); 1810 wr_hi = from->wrh_hi | htonl(F_WR_SOP | F_WR_EOP | 1811 V_WR_BCNTLFLT(len & 7)); 1812 wr_lo = from->wrh_lo | htonl(V_WR_GEN(gen) | V_WR_LEN((len + 7) / 8)); 1813 set_wr_hdr(to, wr_hi, wr_lo); 1814 wmb(); 1815 wr_gen2(d, gen); 1816 } 1817 1818 /** 1819 * check_desc_avail - check descriptor availability on a send queue 1820 * @adap: the adapter 1821 * @q: the TX queue 1822 * @m: the packet needing the descriptors 1823 * @ndesc: the number of Tx descriptors needed 1824 * @qid: the Tx queue number in its queue set (TXQ_OFLD or TXQ_CTRL) 1825 * 1826 * Checks if the requested number of Tx descriptors is available on an 1827 * SGE send queue. If the queue is already suspended or not enough 1828 * descriptors are available the packet is queued for later transmission. 1829 * Must be called with the Tx queue locked. 1830 * 1831 * Returns 0 if enough descriptors are available, 1 if there aren't 1832 * enough descriptors and the packet has been queued, and 2 if the caller 1833 * needs to retry because there weren't enough descriptors at the 1834 * beginning of the call but some freed up in the mean time. 1835 */ 1836 static __inline int 1837 check_desc_avail(adapter_t *adap, struct sge_txq *q, 1838 struct mbuf *m, unsigned int ndesc, 1839 unsigned int qid) 1840 { 1841 /* 1842 * XXX We currently only use this for checking the control queue 1843 * the control queue is only used for binding qsets which happens 1844 * at init time so we are guaranteed enough descriptors 1845 */ 1846 if (__predict_false(mbufq_len(&q->sendq))) { 1847 addq_exit: (void )mbufq_enqueue(&q->sendq, m); 1848 return 1; 1849 } 1850 if (__predict_false(q->size - q->in_use < ndesc)) { 1851 1852 struct sge_qset *qs = txq_to_qset(q, qid); 1853 1854 setbit(&qs->txq_stopped, qid); 1855 if (should_restart_tx(q) && 1856 test_and_clear_bit(qid, &qs->txq_stopped)) 1857 return 2; 1858 1859 q->stops++; 1860 goto addq_exit; 1861 } 1862 return 0; 1863 } 1864 1865 1866 /** 1867 * reclaim_completed_tx_imm - reclaim completed control-queue Tx descs 1868 * @q: the SGE control Tx queue 1869 * 1870 * This is a variant of reclaim_completed_tx() that is used for Tx queues 1871 * that send only immediate data (presently just the control queues) and 1872 * thus do not have any mbufs 1873 */ 1874 static __inline void 1875 reclaim_completed_tx_imm(struct sge_txq *q) 1876 { 1877 unsigned int reclaim = q->processed - q->cleaned; 1878 1879 q->in_use -= reclaim; 1880 q->cleaned += reclaim; 1881 } 1882 1883 /** 1884 * ctrl_xmit - send a packet through an SGE control Tx queue 1885 * @adap: the adapter 1886 * @q: the control queue 1887 * @m: the packet 1888 * 1889 * Send a packet through an SGE control Tx queue. Packets sent through 1890 * a control queue must fit entirely as immediate data in a single Tx 1891 * descriptor and have no page fragments. 1892 */ 1893 static int 1894 ctrl_xmit(adapter_t *adap, struct sge_qset *qs, struct mbuf *m) 1895 { 1896 int ret; 1897 struct work_request_hdr *wrp = mtod(m, struct work_request_hdr *); 1898 struct sge_txq *q = &qs->txq[TXQ_CTRL]; 1899 1900 KASSERT(m->m_len <= WR_LEN, ("%s: bad tx data", __func__)); 1901 1902 wrp->wrh_hi |= htonl(F_WR_SOP | F_WR_EOP); 1903 wrp->wrh_lo = htonl(V_WR_TID(q->token)); 1904 1905 TXQ_LOCK(qs); 1906 again: reclaim_completed_tx_imm(q); 1907 1908 ret = check_desc_avail(adap, q, m, 1, TXQ_CTRL); 1909 if (__predict_false(ret)) { 1910 if (ret == 1) { 1911 TXQ_UNLOCK(qs); 1912 return (ENOSPC); 1913 } 1914 goto again; 1915 } 1916 write_imm(&q->desc[q->pidx], m->m_data, m->m_len, q->gen); 1917 1918 q->in_use++; 1919 if (++q->pidx >= q->size) { 1920 q->pidx = 0; 1921 q->gen ^= 1; 1922 } 1923 TXQ_UNLOCK(qs); 1924 wmb(); 1925 t3_write_reg(adap, A_SG_KDOORBELL, 1926 F_SELEGRCNTX | V_EGRCNTX(q->cntxt_id)); 1927 1928 m_free(m); 1929 return (0); 1930 } 1931 1932 1933 /** 1934 * restart_ctrlq - restart a suspended control queue 1935 * @qs: the queue set cotaining the control queue 1936 * 1937 * Resumes transmission on a suspended Tx control queue. 1938 */ 1939 static void 1940 restart_ctrlq(void *data, int npending) 1941 { 1942 struct mbuf *m; 1943 struct sge_qset *qs = (struct sge_qset *)data; 1944 struct sge_txq *q = &qs->txq[TXQ_CTRL]; 1945 adapter_t *adap = qs->port->adapter; 1946 1947 TXQ_LOCK(qs); 1948 again: reclaim_completed_tx_imm(q); 1949 1950 while (q->in_use < q->size && 1951 (m = mbufq_dequeue(&q->sendq)) != NULL) { 1952 1953 write_imm(&q->desc[q->pidx], m->m_data, m->m_len, q->gen); 1954 m_free(m); 1955 1956 if (++q->pidx >= q->size) { 1957 q->pidx = 0; 1958 q->gen ^= 1; 1959 } 1960 q->in_use++; 1961 } 1962 if (mbufq_len(&q->sendq)) { 1963 setbit(&qs->txq_stopped, TXQ_CTRL); 1964 1965 if (should_restart_tx(q) && 1966 test_and_clear_bit(TXQ_CTRL, &qs->txq_stopped)) 1967 goto again; 1968 q->stops++; 1969 } 1970 TXQ_UNLOCK(qs); 1971 t3_write_reg(adap, A_SG_KDOORBELL, 1972 F_SELEGRCNTX | V_EGRCNTX(q->cntxt_id)); 1973 } 1974 1975 1976 /* 1977 * Send a management message through control queue 0 1978 */ 1979 int 1980 t3_mgmt_tx(struct adapter *adap, struct mbuf *m) 1981 { 1982 return ctrl_xmit(adap, &adap->sge.qs[0], m); 1983 } 1984 1985 /** 1986 * free_qset - free the resources of an SGE queue set 1987 * @sc: the controller owning the queue set 1988 * @q: the queue set 1989 * 1990 * Release the HW and SW resources associated with an SGE queue set, such 1991 * as HW contexts, packet buffers, and descriptor rings. Traffic to the 1992 * queue set must be quiesced prior to calling this. 1993 */ 1994 static void 1995 t3_free_qset(adapter_t *sc, struct sge_qset *q) 1996 { 1997 int i; 1998 1999 reclaim_completed_tx(q, 0, TXQ_ETH); 2000 if (q->txq[TXQ_ETH].txq_mr != NULL) 2001 buf_ring_free(q->txq[TXQ_ETH].txq_mr, M_DEVBUF); 2002 if (q->txq[TXQ_ETH].txq_ifq != NULL) { 2003 ifq_delete(q->txq[TXQ_ETH].txq_ifq); 2004 free(q->txq[TXQ_ETH].txq_ifq, M_DEVBUF); 2005 } 2006 2007 for (i = 0; i < SGE_RXQ_PER_SET; ++i) { 2008 if (q->fl[i].desc) { 2009 mtx_lock_spin(&sc->sge.reg_lock); 2010 t3_sge_disable_fl(sc, q->fl[i].cntxt_id); 2011 mtx_unlock_spin(&sc->sge.reg_lock); 2012 bus_dmamap_unload(q->fl[i].desc_tag, q->fl[i].desc_map); 2013 bus_dmamem_free(q->fl[i].desc_tag, q->fl[i].desc, 2014 q->fl[i].desc_map); 2015 bus_dma_tag_destroy(q->fl[i].desc_tag); 2016 bus_dma_tag_destroy(q->fl[i].entry_tag); 2017 } 2018 if (q->fl[i].sdesc) { 2019 free_rx_bufs(sc, &q->fl[i]); 2020 free(q->fl[i].sdesc, M_DEVBUF); 2021 } 2022 } 2023 2024 mtx_unlock(&q->lock); 2025 MTX_DESTROY(&q->lock); 2026 for (i = 0; i < SGE_TXQ_PER_SET; i++) { 2027 if (q->txq[i].desc) { 2028 mtx_lock_spin(&sc->sge.reg_lock); 2029 t3_sge_enable_ecntxt(sc, q->txq[i].cntxt_id, 0); 2030 mtx_unlock_spin(&sc->sge.reg_lock); 2031 bus_dmamap_unload(q->txq[i].desc_tag, 2032 q->txq[i].desc_map); 2033 bus_dmamem_free(q->txq[i].desc_tag, q->txq[i].desc, 2034 q->txq[i].desc_map); 2035 bus_dma_tag_destroy(q->txq[i].desc_tag); 2036 bus_dma_tag_destroy(q->txq[i].entry_tag); 2037 } 2038 if (q->txq[i].sdesc) { 2039 free(q->txq[i].sdesc, M_DEVBUF); 2040 } 2041 } 2042 2043 if (q->rspq.desc) { 2044 mtx_lock_spin(&sc->sge.reg_lock); 2045 t3_sge_disable_rspcntxt(sc, q->rspq.cntxt_id); 2046 mtx_unlock_spin(&sc->sge.reg_lock); 2047 2048 bus_dmamap_unload(q->rspq.desc_tag, q->rspq.desc_map); 2049 bus_dmamem_free(q->rspq.desc_tag, q->rspq.desc, 2050 q->rspq.desc_map); 2051 bus_dma_tag_destroy(q->rspq.desc_tag); 2052 MTX_DESTROY(&q->rspq.lock); 2053 } 2054 2055 #if defined(INET6) || defined(INET) 2056 tcp_lro_free(&q->lro.ctrl); 2057 #endif 2058 2059 bzero(q, sizeof(*q)); 2060 } 2061 2062 /** 2063 * t3_free_sge_resources - free SGE resources 2064 * @sc: the adapter softc 2065 * 2066 * Frees resources used by the SGE queue sets. 2067 */ 2068 void 2069 t3_free_sge_resources(adapter_t *sc, int nqsets) 2070 { 2071 int i; 2072 2073 for (i = 0; i < nqsets; ++i) { 2074 TXQ_LOCK(&sc->sge.qs[i]); 2075 t3_free_qset(sc, &sc->sge.qs[i]); 2076 } 2077 } 2078 2079 /** 2080 * t3_sge_start - enable SGE 2081 * @sc: the controller softc 2082 * 2083 * Enables the SGE for DMAs. This is the last step in starting packet 2084 * transfers. 2085 */ 2086 void 2087 t3_sge_start(adapter_t *sc) 2088 { 2089 t3_set_reg_field(sc, A_SG_CONTROL, F_GLOBALENABLE, F_GLOBALENABLE); 2090 } 2091 2092 /** 2093 * t3_sge_stop - disable SGE operation 2094 * @sc: the adapter 2095 * 2096 * Disables the DMA engine. This can be called in emeregencies (e.g., 2097 * from error interrupts) or from normal process context. In the latter 2098 * case it also disables any pending queue restart tasklets. Note that 2099 * if it is called in interrupt context it cannot disable the restart 2100 * tasklets as it cannot wait, however the tasklets will have no effect 2101 * since the doorbells are disabled and the driver will call this again 2102 * later from process context, at which time the tasklets will be stopped 2103 * if they are still running. 2104 */ 2105 void 2106 t3_sge_stop(adapter_t *sc) 2107 { 2108 int i, nqsets; 2109 2110 t3_set_reg_field(sc, A_SG_CONTROL, F_GLOBALENABLE, 0); 2111 2112 if (sc->tq == NULL) 2113 return; 2114 2115 for (nqsets = i = 0; i < (sc)->params.nports; i++) 2116 nqsets += sc->port[i].nqsets; 2117 #ifdef notyet 2118 /* 2119 * 2120 * XXX 2121 */ 2122 for (i = 0; i < nqsets; ++i) { 2123 struct sge_qset *qs = &sc->sge.qs[i]; 2124 2125 taskqueue_drain(sc->tq, &qs->txq[TXQ_OFLD].qresume_task); 2126 taskqueue_drain(sc->tq, &qs->txq[TXQ_CTRL].qresume_task); 2127 } 2128 #endif 2129 } 2130 2131 /** 2132 * t3_free_tx_desc - reclaims Tx descriptors and their buffers 2133 * @adapter: the adapter 2134 * @q: the Tx queue to reclaim descriptors from 2135 * @reclaimable: the number of descriptors to reclaim 2136 * @m_vec_size: maximum number of buffers to reclaim 2137 * @desc_reclaimed: returns the number of descriptors reclaimed 2138 * 2139 * Reclaims Tx descriptors from an SGE Tx queue and frees the associated 2140 * Tx buffers. Called with the Tx queue lock held. 2141 * 2142 * Returns number of buffers of reclaimed 2143 */ 2144 void 2145 t3_free_tx_desc(struct sge_qset *qs, int reclaimable, int queue) 2146 { 2147 struct tx_sw_desc *txsd; 2148 unsigned int cidx, mask; 2149 struct sge_txq *q = &qs->txq[queue]; 2150 2151 #ifdef T3_TRACE 2152 T3_TRACE2(sc->tb[q->cntxt_id & 7], 2153 "reclaiming %u Tx descriptors at cidx %u", reclaimable, cidx); 2154 #endif 2155 cidx = q->cidx; 2156 mask = q->size - 1; 2157 txsd = &q->sdesc[cidx]; 2158 2159 mtx_assert(&qs->lock, MA_OWNED); 2160 while (reclaimable--) { 2161 prefetch(q->sdesc[(cidx + 1) & mask].m); 2162 prefetch(q->sdesc[(cidx + 2) & mask].m); 2163 2164 if (txsd->m != NULL) { 2165 if (txsd->flags & TX_SW_DESC_MAPPED) { 2166 bus_dmamap_unload(q->entry_tag, txsd->map); 2167 txsd->flags &= ~TX_SW_DESC_MAPPED; 2168 } 2169 m_freem_list(txsd->m); 2170 txsd->m = NULL; 2171 } else 2172 q->txq_skipped++; 2173 2174 ++txsd; 2175 if (++cidx == q->size) { 2176 cidx = 0; 2177 txsd = q->sdesc; 2178 } 2179 } 2180 q->cidx = cidx; 2181 2182 } 2183 2184 /** 2185 * is_new_response - check if a response is newly written 2186 * @r: the response descriptor 2187 * @q: the response queue 2188 * 2189 * Returns true if a response descriptor contains a yet unprocessed 2190 * response. 2191 */ 2192 static __inline int 2193 is_new_response(const struct rsp_desc *r, 2194 const struct sge_rspq *q) 2195 { 2196 return (r->intr_gen & F_RSPD_GEN2) == q->gen; 2197 } 2198 2199 #define RSPD_GTS_MASK (F_RSPD_TXQ0_GTS | F_RSPD_TXQ1_GTS) 2200 #define RSPD_CTRL_MASK (RSPD_GTS_MASK | \ 2201 V_RSPD_TXQ0_CR(M_RSPD_TXQ0_CR) | \ 2202 V_RSPD_TXQ1_CR(M_RSPD_TXQ1_CR) | \ 2203 V_RSPD_TXQ2_CR(M_RSPD_TXQ2_CR)) 2204 2205 /* How long to delay the next interrupt in case of memory shortage, in 0.1us. */ 2206 #define NOMEM_INTR_DELAY 2500 2207 2208 #ifdef TCP_OFFLOAD 2209 /** 2210 * write_ofld_wr - write an offload work request 2211 * @adap: the adapter 2212 * @m: the packet to send 2213 * @q: the Tx queue 2214 * @pidx: index of the first Tx descriptor to write 2215 * @gen: the generation value to use 2216 * @ndesc: number of descriptors the packet will occupy 2217 * 2218 * Write an offload work request to send the supplied packet. The packet 2219 * data already carry the work request with most fields populated. 2220 */ 2221 static void 2222 write_ofld_wr(adapter_t *adap, struct mbuf *m, struct sge_txq *q, 2223 unsigned int pidx, unsigned int gen, unsigned int ndesc) 2224 { 2225 unsigned int sgl_flits, flits; 2226 int i, idx, nsegs, wrlen; 2227 struct work_request_hdr *from; 2228 struct sg_ent *sgp, t3sgl[TX_MAX_SEGS / 2 + 1]; 2229 struct tx_desc *d = &q->desc[pidx]; 2230 struct txq_state txqs; 2231 struct sglist_seg *segs; 2232 struct ofld_hdr *oh = mtod(m, struct ofld_hdr *); 2233 struct sglist *sgl; 2234 2235 from = (void *)(oh + 1); /* Start of WR within mbuf */ 2236 wrlen = m->m_len - sizeof(*oh); 2237 2238 if (!(oh->flags & F_HDR_SGL)) { 2239 write_imm(d, (caddr_t)from, wrlen, gen); 2240 2241 /* 2242 * mbuf with "real" immediate tx data will be enqueue_wr'd by 2243 * t3_push_frames and freed in wr_ack. Others, like those sent 2244 * down by close_conn, t3_send_reset, etc. should be freed here. 2245 */ 2246 if (!(oh->flags & F_HDR_DF)) 2247 m_free(m); 2248 return; 2249 } 2250 2251 memcpy(&d->flit[1], &from[1], wrlen - sizeof(*from)); 2252 2253 sgl = oh->sgl; 2254 flits = wrlen / 8; 2255 sgp = (ndesc == 1) ? (struct sg_ent *)&d->flit[flits] : t3sgl; 2256 2257 nsegs = sgl->sg_nseg; 2258 segs = sgl->sg_segs; 2259 for (idx = 0, i = 0; i < nsegs; i++) { 2260 KASSERT(segs[i].ss_len, ("%s: 0 len in sgl", __func__)); 2261 if (i && idx == 0) 2262 ++sgp; 2263 sgp->len[idx] = htobe32(segs[i].ss_len); 2264 sgp->addr[idx] = htobe64(segs[i].ss_paddr); 2265 idx ^= 1; 2266 } 2267 if (idx) { 2268 sgp->len[idx] = 0; 2269 sgp->addr[idx] = 0; 2270 } 2271 2272 sgl_flits = sgl_len(nsegs); 2273 txqs.gen = gen; 2274 txqs.pidx = pidx; 2275 txqs.compl = 0; 2276 2277 write_wr_hdr_sgl(ndesc, d, &txqs, q, t3sgl, flits, sgl_flits, 2278 from->wrh_hi, from->wrh_lo); 2279 } 2280 2281 /** 2282 * ofld_xmit - send a packet through an offload queue 2283 * @adap: the adapter 2284 * @q: the Tx offload queue 2285 * @m: the packet 2286 * 2287 * Send an offload packet through an SGE offload queue. 2288 */ 2289 static int 2290 ofld_xmit(adapter_t *adap, struct sge_qset *qs, struct mbuf *m) 2291 { 2292 int ret; 2293 unsigned int ndesc; 2294 unsigned int pidx, gen; 2295 struct sge_txq *q = &qs->txq[TXQ_OFLD]; 2296 struct ofld_hdr *oh = mtod(m, struct ofld_hdr *); 2297 2298 ndesc = G_HDR_NDESC(oh->flags); 2299 2300 TXQ_LOCK(qs); 2301 again: reclaim_completed_tx(qs, 16, TXQ_OFLD); 2302 ret = check_desc_avail(adap, q, m, ndesc, TXQ_OFLD); 2303 if (__predict_false(ret)) { 2304 if (ret == 1) { 2305 TXQ_UNLOCK(qs); 2306 return (EINTR); 2307 } 2308 goto again; 2309 } 2310 2311 gen = q->gen; 2312 q->in_use += ndesc; 2313 pidx = q->pidx; 2314 q->pidx += ndesc; 2315 if (q->pidx >= q->size) { 2316 q->pidx -= q->size; 2317 q->gen ^= 1; 2318 } 2319 2320 write_ofld_wr(adap, m, q, pidx, gen, ndesc); 2321 check_ring_tx_db(adap, q, 1); 2322 TXQ_UNLOCK(qs); 2323 2324 return (0); 2325 } 2326 2327 /** 2328 * restart_offloadq - restart a suspended offload queue 2329 * @qs: the queue set cotaining the offload queue 2330 * 2331 * Resumes transmission on a suspended Tx offload queue. 2332 */ 2333 static void 2334 restart_offloadq(void *data, int npending) 2335 { 2336 struct mbuf *m; 2337 struct sge_qset *qs = data; 2338 struct sge_txq *q = &qs->txq[TXQ_OFLD]; 2339 adapter_t *adap = qs->port->adapter; 2340 int cleaned; 2341 2342 TXQ_LOCK(qs); 2343 again: cleaned = reclaim_completed_tx(qs, 16, TXQ_OFLD); 2344 2345 while ((m = mbufq_first(&q->sendq)) != NULL) { 2346 unsigned int gen, pidx; 2347 struct ofld_hdr *oh = mtod(m, struct ofld_hdr *); 2348 unsigned int ndesc = G_HDR_NDESC(oh->flags); 2349 2350 if (__predict_false(q->size - q->in_use < ndesc)) { 2351 setbit(&qs->txq_stopped, TXQ_OFLD); 2352 if (should_restart_tx(q) && 2353 test_and_clear_bit(TXQ_OFLD, &qs->txq_stopped)) 2354 goto again; 2355 q->stops++; 2356 break; 2357 } 2358 2359 gen = q->gen; 2360 q->in_use += ndesc; 2361 pidx = q->pidx; 2362 q->pidx += ndesc; 2363 if (q->pidx >= q->size) { 2364 q->pidx -= q->size; 2365 q->gen ^= 1; 2366 } 2367 2368 (void)mbufq_dequeue(&q->sendq); 2369 TXQ_UNLOCK(qs); 2370 write_ofld_wr(adap, m, q, pidx, gen, ndesc); 2371 TXQ_LOCK(qs); 2372 } 2373 #if USE_GTS 2374 set_bit(TXQ_RUNNING, &q->flags); 2375 set_bit(TXQ_LAST_PKT_DB, &q->flags); 2376 #endif 2377 TXQ_UNLOCK(qs); 2378 wmb(); 2379 t3_write_reg(adap, A_SG_KDOORBELL, 2380 F_SELEGRCNTX | V_EGRCNTX(q->cntxt_id)); 2381 } 2382 2383 /** 2384 * t3_offload_tx - send an offload packet 2385 * @m: the packet 2386 * 2387 * Sends an offload packet. We use the packet priority to select the 2388 * appropriate Tx queue as follows: bit 0 indicates whether the packet 2389 * should be sent as regular or control, bits 1-3 select the queue set. 2390 */ 2391 int 2392 t3_offload_tx(struct adapter *sc, struct mbuf *m) 2393 { 2394 struct ofld_hdr *oh = mtod(m, struct ofld_hdr *); 2395 struct sge_qset *qs = &sc->sge.qs[G_HDR_QSET(oh->flags)]; 2396 2397 if (oh->flags & F_HDR_CTRL) { 2398 m_adj(m, sizeof (*oh)); /* trim ofld_hdr off */ 2399 return (ctrl_xmit(sc, qs, m)); 2400 } else 2401 return (ofld_xmit(sc, qs, m)); 2402 } 2403 #endif 2404 2405 static void 2406 restart_tx(struct sge_qset *qs) 2407 { 2408 struct adapter *sc = qs->port->adapter; 2409 2410 if (isset(&qs->txq_stopped, TXQ_OFLD) && 2411 should_restart_tx(&qs->txq[TXQ_OFLD]) && 2412 test_and_clear_bit(TXQ_OFLD, &qs->txq_stopped)) { 2413 qs->txq[TXQ_OFLD].restarts++; 2414 taskqueue_enqueue(sc->tq, &qs->txq[TXQ_OFLD].qresume_task); 2415 } 2416 2417 if (isset(&qs->txq_stopped, TXQ_CTRL) && 2418 should_restart_tx(&qs->txq[TXQ_CTRL]) && 2419 test_and_clear_bit(TXQ_CTRL, &qs->txq_stopped)) { 2420 qs->txq[TXQ_CTRL].restarts++; 2421 taskqueue_enqueue(sc->tq, &qs->txq[TXQ_CTRL].qresume_task); 2422 } 2423 } 2424 2425 /** 2426 * t3_sge_alloc_qset - initialize an SGE queue set 2427 * @sc: the controller softc 2428 * @id: the queue set id 2429 * @nports: how many Ethernet ports will be using this queue set 2430 * @irq_vec_idx: the IRQ vector index for response queue interrupts 2431 * @p: configuration parameters for this queue set 2432 * @ntxq: number of Tx queues for the queue set 2433 * @pi: port info for queue set 2434 * 2435 * Allocate resources and initialize an SGE queue set. A queue set 2436 * comprises a response queue, two Rx free-buffer queues, and up to 3 2437 * Tx queues. The Tx queues are assigned roles in the order Ethernet 2438 * queue, offload queue, and control queue. 2439 */ 2440 int 2441 t3_sge_alloc_qset(adapter_t *sc, u_int id, int nports, int irq_vec_idx, 2442 const struct qset_params *p, int ntxq, struct port_info *pi) 2443 { 2444 struct sge_qset *q = &sc->sge.qs[id]; 2445 int i, ret = 0; 2446 2447 MTX_INIT(&q->lock, q->namebuf, NULL, MTX_DEF); 2448 q->port = pi; 2449 q->adap = sc; 2450 2451 if ((q->txq[TXQ_ETH].txq_mr = buf_ring_alloc(cxgb_txq_buf_ring_size, 2452 M_DEVBUF, M_WAITOK, &q->lock)) == NULL) { 2453 device_printf(sc->dev, "failed to allocate mbuf ring\n"); 2454 goto err; 2455 } 2456 if ((q->txq[TXQ_ETH].txq_ifq = malloc(sizeof(struct ifaltq), M_DEVBUF, 2457 M_NOWAIT | M_ZERO)) == NULL) { 2458 device_printf(sc->dev, "failed to allocate ifq\n"); 2459 goto err; 2460 } 2461 ifq_init(q->txq[TXQ_ETH].txq_ifq, pi->ifp); 2462 callout_init(&q->txq[TXQ_ETH].txq_timer, 1); 2463 callout_init(&q->txq[TXQ_ETH].txq_watchdog, 1); 2464 q->txq[TXQ_ETH].txq_timer.c_cpu = id % mp_ncpus; 2465 q->txq[TXQ_ETH].txq_watchdog.c_cpu = id % mp_ncpus; 2466 2467 init_qset_cntxt(q, id); 2468 q->idx = id; 2469 if ((ret = alloc_ring(sc, p->fl_size, sizeof(struct rx_desc), 2470 sizeof(struct rx_sw_desc), &q->fl[0].phys_addr, 2471 &q->fl[0].desc, &q->fl[0].sdesc, 2472 &q->fl[0].desc_tag, &q->fl[0].desc_map, 2473 sc->rx_dmat, &q->fl[0].entry_tag)) != 0) { 2474 printf("error %d from alloc ring fl0\n", ret); 2475 goto err; 2476 } 2477 2478 if ((ret = alloc_ring(sc, p->jumbo_size, sizeof(struct rx_desc), 2479 sizeof(struct rx_sw_desc), &q->fl[1].phys_addr, 2480 &q->fl[1].desc, &q->fl[1].sdesc, 2481 &q->fl[1].desc_tag, &q->fl[1].desc_map, 2482 sc->rx_jumbo_dmat, &q->fl[1].entry_tag)) != 0) { 2483 printf("error %d from alloc ring fl1\n", ret); 2484 goto err; 2485 } 2486 2487 if ((ret = alloc_ring(sc, p->rspq_size, sizeof(struct rsp_desc), 0, 2488 &q->rspq.phys_addr, &q->rspq.desc, NULL, 2489 &q->rspq.desc_tag, &q->rspq.desc_map, 2490 NULL, NULL)) != 0) { 2491 printf("error %d from alloc ring rspq\n", ret); 2492 goto err; 2493 } 2494 2495 snprintf(q->rspq.lockbuf, RSPQ_NAME_LEN, "t3 rspq lock %d:%d", 2496 device_get_unit(sc->dev), irq_vec_idx); 2497 MTX_INIT(&q->rspq.lock, q->rspq.lockbuf, NULL, MTX_DEF); 2498 2499 for (i = 0; i < ntxq; ++i) { 2500 size_t sz = i == TXQ_CTRL ? 0 : sizeof(struct tx_sw_desc); 2501 2502 if ((ret = alloc_ring(sc, p->txq_size[i], 2503 sizeof(struct tx_desc), sz, 2504 &q->txq[i].phys_addr, &q->txq[i].desc, 2505 &q->txq[i].sdesc, &q->txq[i].desc_tag, 2506 &q->txq[i].desc_map, 2507 sc->tx_dmat, &q->txq[i].entry_tag)) != 0) { 2508 printf("error %d from alloc ring tx %i\n", ret, i); 2509 goto err; 2510 } 2511 mbufq_init(&q->txq[i].sendq, INT_MAX); 2512 q->txq[i].gen = 1; 2513 q->txq[i].size = p->txq_size[i]; 2514 } 2515 2516 #ifdef TCP_OFFLOAD 2517 TASK_INIT(&q->txq[TXQ_OFLD].qresume_task, 0, restart_offloadq, q); 2518 #endif 2519 TASK_INIT(&q->txq[TXQ_CTRL].qresume_task, 0, restart_ctrlq, q); 2520 TASK_INIT(&q->txq[TXQ_ETH].qreclaim_task, 0, sge_txq_reclaim_handler, q); 2521 TASK_INIT(&q->txq[TXQ_OFLD].qreclaim_task, 0, sge_txq_reclaim_handler, q); 2522 2523 q->fl[0].gen = q->fl[1].gen = 1; 2524 q->fl[0].size = p->fl_size; 2525 q->fl[1].size = p->jumbo_size; 2526 2527 q->rspq.gen = 1; 2528 q->rspq.cidx = 0; 2529 q->rspq.size = p->rspq_size; 2530 2531 q->txq[TXQ_ETH].stop_thres = nports * 2532 flits_to_desc(sgl_len(TX_MAX_SEGS + 1) + 3); 2533 2534 q->fl[0].buf_size = MCLBYTES; 2535 q->fl[0].zone = zone_pack; 2536 q->fl[0].type = EXT_PACKET; 2537 2538 if (p->jumbo_buf_size == MJUM16BYTES) { 2539 q->fl[1].zone = zone_jumbo16; 2540 q->fl[1].type = EXT_JUMBO16; 2541 } else if (p->jumbo_buf_size == MJUM9BYTES) { 2542 q->fl[1].zone = zone_jumbo9; 2543 q->fl[1].type = EXT_JUMBO9; 2544 } else if (p->jumbo_buf_size == MJUMPAGESIZE) { 2545 q->fl[1].zone = zone_jumbop; 2546 q->fl[1].type = EXT_JUMBOP; 2547 } else { 2548 KASSERT(0, ("can't deal with jumbo_buf_size %d.", p->jumbo_buf_size)); 2549 ret = EDOOFUS; 2550 goto err; 2551 } 2552 q->fl[1].buf_size = p->jumbo_buf_size; 2553 2554 /* Allocate and setup the lro_ctrl structure */ 2555 q->lro.enabled = !!(pi->ifp->if_capenable & IFCAP_LRO); 2556 #if defined(INET6) || defined(INET) 2557 ret = tcp_lro_init(&q->lro.ctrl); 2558 if (ret) { 2559 printf("error %d from tcp_lro_init\n", ret); 2560 goto err; 2561 } 2562 #endif 2563 q->lro.ctrl.ifp = pi->ifp; 2564 2565 mtx_lock_spin(&sc->sge.reg_lock); 2566 ret = -t3_sge_init_rspcntxt(sc, q->rspq.cntxt_id, irq_vec_idx, 2567 q->rspq.phys_addr, q->rspq.size, 2568 q->fl[0].buf_size, 1, 0); 2569 if (ret) { 2570 printf("error %d from t3_sge_init_rspcntxt\n", ret); 2571 goto err_unlock; 2572 } 2573 2574 for (i = 0; i < SGE_RXQ_PER_SET; ++i) { 2575 ret = -t3_sge_init_flcntxt(sc, q->fl[i].cntxt_id, 0, 2576 q->fl[i].phys_addr, q->fl[i].size, 2577 q->fl[i].buf_size, p->cong_thres, 1, 2578 0); 2579 if (ret) { 2580 printf("error %d from t3_sge_init_flcntxt for index i=%d\n", ret, i); 2581 goto err_unlock; 2582 } 2583 } 2584 2585 ret = -t3_sge_init_ecntxt(sc, q->txq[TXQ_ETH].cntxt_id, USE_GTS, 2586 SGE_CNTXT_ETH, id, q->txq[TXQ_ETH].phys_addr, 2587 q->txq[TXQ_ETH].size, q->txq[TXQ_ETH].token, 2588 1, 0); 2589 if (ret) { 2590 printf("error %d from t3_sge_init_ecntxt\n", ret); 2591 goto err_unlock; 2592 } 2593 2594 if (ntxq > 1) { 2595 ret = -t3_sge_init_ecntxt(sc, q->txq[TXQ_OFLD].cntxt_id, 2596 USE_GTS, SGE_CNTXT_OFLD, id, 2597 q->txq[TXQ_OFLD].phys_addr, 2598 q->txq[TXQ_OFLD].size, 0, 1, 0); 2599 if (ret) { 2600 printf("error %d from t3_sge_init_ecntxt\n", ret); 2601 goto err_unlock; 2602 } 2603 } 2604 2605 if (ntxq > 2) { 2606 ret = -t3_sge_init_ecntxt(sc, q->txq[TXQ_CTRL].cntxt_id, 0, 2607 SGE_CNTXT_CTRL, id, 2608 q->txq[TXQ_CTRL].phys_addr, 2609 q->txq[TXQ_CTRL].size, 2610 q->txq[TXQ_CTRL].token, 1, 0); 2611 if (ret) { 2612 printf("error %d from t3_sge_init_ecntxt\n", ret); 2613 goto err_unlock; 2614 } 2615 } 2616 2617 mtx_unlock_spin(&sc->sge.reg_lock); 2618 t3_update_qset_coalesce(q, p); 2619 2620 refill_fl(sc, &q->fl[0], q->fl[0].size); 2621 refill_fl(sc, &q->fl[1], q->fl[1].size); 2622 refill_rspq(sc, &q->rspq, q->rspq.size - 1); 2623 2624 t3_write_reg(sc, A_SG_GTS, V_RSPQ(q->rspq.cntxt_id) | 2625 V_NEWTIMER(q->rspq.holdoff_tmr)); 2626 2627 return (0); 2628 2629 err_unlock: 2630 mtx_unlock_spin(&sc->sge.reg_lock); 2631 err: 2632 TXQ_LOCK(q); 2633 t3_free_qset(sc, q); 2634 2635 return (ret); 2636 } 2637 2638 /* 2639 * Remove CPL_RX_PKT headers from the mbuf and reduce it to a regular mbuf with 2640 * ethernet data. Hardware assistance with various checksums and any vlan tag 2641 * will also be taken into account here. 2642 */ 2643 void 2644 t3_rx_eth(struct adapter *adap, struct mbuf *m, int ethpad) 2645 { 2646 struct cpl_rx_pkt *cpl = (struct cpl_rx_pkt *)(mtod(m, uint8_t *) + ethpad); 2647 struct port_info *pi = &adap->port[adap->rxpkt_map[cpl->iff]]; 2648 struct ifnet *ifp = pi->ifp; 2649 2650 if (cpl->vlan_valid) { 2651 m->m_pkthdr.ether_vtag = ntohs(cpl->vlan); 2652 m->m_flags |= M_VLANTAG; 2653 } 2654 2655 m->m_pkthdr.rcvif = ifp; 2656 /* 2657 * adjust after conversion to mbuf chain 2658 */ 2659 m->m_pkthdr.len -= (sizeof(*cpl) + ethpad); 2660 m->m_len -= (sizeof(*cpl) + ethpad); 2661 m->m_data += (sizeof(*cpl) + ethpad); 2662 2663 if (!cpl->fragment && cpl->csum_valid && cpl->csum == 0xffff) { 2664 struct ether_header *eh = mtod(m, void *); 2665 uint16_t eh_type; 2666 2667 if (eh->ether_type == htons(ETHERTYPE_VLAN)) { 2668 struct ether_vlan_header *evh = mtod(m, void *); 2669 2670 eh_type = evh->evl_proto; 2671 } else 2672 eh_type = eh->ether_type; 2673 2674 if (ifp->if_capenable & IFCAP_RXCSUM && 2675 eh_type == htons(ETHERTYPE_IP)) { 2676 m->m_pkthdr.csum_flags = (CSUM_IP_CHECKED | 2677 CSUM_IP_VALID | CSUM_DATA_VALID | CSUM_PSEUDO_HDR); 2678 m->m_pkthdr.csum_data = 0xffff; 2679 } else if (ifp->if_capenable & IFCAP_RXCSUM_IPV6 && 2680 eh_type == htons(ETHERTYPE_IPV6)) { 2681 m->m_pkthdr.csum_flags = (CSUM_DATA_VALID_IPV6 | 2682 CSUM_PSEUDO_HDR); 2683 m->m_pkthdr.csum_data = 0xffff; 2684 } 2685 } 2686 } 2687 2688 /** 2689 * get_packet - return the next ingress packet buffer from a free list 2690 * @adap: the adapter that received the packet 2691 * @drop_thres: # of remaining buffers before we start dropping packets 2692 * @qs: the qset that the SGE free list holding the packet belongs to 2693 * @mh: the mbuf header, contains a pointer to the head and tail of the mbuf chain 2694 * @r: response descriptor 2695 * 2696 * Get the next packet from a free list and complete setup of the 2697 * sk_buff. If the packet is small we make a copy and recycle the 2698 * original buffer, otherwise we use the original buffer itself. If a 2699 * positive drop threshold is supplied packets are dropped and their 2700 * buffers recycled if (a) the number of remaining buffers is under the 2701 * threshold and the packet is too big to copy, or (b) the packet should 2702 * be copied but there is no memory for the copy. 2703 */ 2704 static int 2705 get_packet(adapter_t *adap, unsigned int drop_thres, struct sge_qset *qs, 2706 struct t3_mbuf_hdr *mh, struct rsp_desc *r) 2707 { 2708 2709 unsigned int len_cq = ntohl(r->len_cq); 2710 struct sge_fl *fl = (len_cq & F_RSPD_FLQ) ? &qs->fl[1] : &qs->fl[0]; 2711 int mask, cidx = fl->cidx; 2712 struct rx_sw_desc *sd = &fl->sdesc[cidx]; 2713 uint32_t len = G_RSPD_LEN(len_cq); 2714 uint32_t flags = M_EXT; 2715 uint8_t sopeop = G_RSPD_SOP_EOP(ntohl(r->flags)); 2716 caddr_t cl; 2717 struct mbuf *m; 2718 int ret = 0; 2719 2720 mask = fl->size - 1; 2721 prefetch(fl->sdesc[(cidx + 1) & mask].m); 2722 prefetch(fl->sdesc[(cidx + 2) & mask].m); 2723 prefetch(fl->sdesc[(cidx + 1) & mask].rxsd_cl); 2724 prefetch(fl->sdesc[(cidx + 2) & mask].rxsd_cl); 2725 2726 fl->credits--; 2727 bus_dmamap_sync(fl->entry_tag, sd->map, BUS_DMASYNC_POSTREAD); 2728 2729 if (recycle_enable && len <= SGE_RX_COPY_THRES && 2730 sopeop == RSPQ_SOP_EOP) { 2731 if ((m = m_gethdr(M_NOWAIT, MT_DATA)) == NULL) 2732 goto skip_recycle; 2733 cl = mtod(m, void *); 2734 memcpy(cl, sd->rxsd_cl, len); 2735 recycle_rx_buf(adap, fl, fl->cidx); 2736 m->m_pkthdr.len = m->m_len = len; 2737 m->m_flags = 0; 2738 mh->mh_head = mh->mh_tail = m; 2739 ret = 1; 2740 goto done; 2741 } else { 2742 skip_recycle: 2743 bus_dmamap_unload(fl->entry_tag, sd->map); 2744 cl = sd->rxsd_cl; 2745 m = sd->m; 2746 2747 if ((sopeop == RSPQ_SOP_EOP) || 2748 (sopeop == RSPQ_SOP)) 2749 flags |= M_PKTHDR; 2750 m_init(m, M_NOWAIT, MT_DATA, flags); 2751 if (fl->zone == zone_pack) { 2752 /* 2753 * restore clobbered data pointer 2754 */ 2755 m->m_data = m->m_ext.ext_buf; 2756 } else { 2757 m_cljset(m, cl, fl->type); 2758 } 2759 m->m_len = len; 2760 } 2761 switch(sopeop) { 2762 case RSPQ_SOP_EOP: 2763 ret = 1; 2764 /* FALLTHROUGH */ 2765 case RSPQ_SOP: 2766 mh->mh_head = mh->mh_tail = m; 2767 m->m_pkthdr.len = len; 2768 break; 2769 case RSPQ_EOP: 2770 ret = 1; 2771 /* FALLTHROUGH */ 2772 case RSPQ_NSOP_NEOP: 2773 if (mh->mh_tail == NULL) { 2774 log(LOG_ERR, "discarding intermediate descriptor entry\n"); 2775 m_freem(m); 2776 m = NULL; 2777 break; 2778 } 2779 mh->mh_tail->m_next = m; 2780 mh->mh_tail = m; 2781 mh->mh_head->m_pkthdr.len += len; 2782 break; 2783 } 2784 if (cxgb_debug && m != NULL) 2785 printf("len=%d pktlen=%d\n", m->m_len, m->m_pkthdr.len); 2786 done: 2787 if (++fl->cidx == fl->size) 2788 fl->cidx = 0; 2789 2790 return (ret); 2791 } 2792 2793 /** 2794 * handle_rsp_cntrl_info - handles control information in a response 2795 * @qs: the queue set corresponding to the response 2796 * @flags: the response control flags 2797 * 2798 * Handles the control information of an SGE response, such as GTS 2799 * indications and completion credits for the queue set's Tx queues. 2800 * HW coalesces credits, we don't do any extra SW coalescing. 2801 */ 2802 static __inline void 2803 handle_rsp_cntrl_info(struct sge_qset *qs, uint32_t flags) 2804 { 2805 unsigned int credits; 2806 2807 #if USE_GTS 2808 if (flags & F_RSPD_TXQ0_GTS) 2809 clear_bit(TXQ_RUNNING, &qs->txq[TXQ_ETH].flags); 2810 #endif 2811 credits = G_RSPD_TXQ0_CR(flags); 2812 if (credits) 2813 qs->txq[TXQ_ETH].processed += credits; 2814 2815 credits = G_RSPD_TXQ2_CR(flags); 2816 if (credits) 2817 qs->txq[TXQ_CTRL].processed += credits; 2818 2819 # if USE_GTS 2820 if (flags & F_RSPD_TXQ1_GTS) 2821 clear_bit(TXQ_RUNNING, &qs->txq[TXQ_OFLD].flags); 2822 # endif 2823 credits = G_RSPD_TXQ1_CR(flags); 2824 if (credits) 2825 qs->txq[TXQ_OFLD].processed += credits; 2826 2827 } 2828 2829 static void 2830 check_ring_db(adapter_t *adap, struct sge_qset *qs, 2831 unsigned int sleeping) 2832 { 2833 ; 2834 } 2835 2836 /** 2837 * process_responses - process responses from an SGE response queue 2838 * @adap: the adapter 2839 * @qs: the queue set to which the response queue belongs 2840 * @budget: how many responses can be processed in this round 2841 * 2842 * Process responses from an SGE response queue up to the supplied budget. 2843 * Responses include received packets as well as credits and other events 2844 * for the queues that belong to the response queue's queue set. 2845 * A negative budget is effectively unlimited. 2846 * 2847 * Additionally choose the interrupt holdoff time for the next interrupt 2848 * on this queue. If the system is under memory shortage use a fairly 2849 * long delay to help recovery. 2850 */ 2851 static int 2852 process_responses(adapter_t *adap, struct sge_qset *qs, int budget) 2853 { 2854 struct sge_rspq *rspq = &qs->rspq; 2855 struct rsp_desc *r = &rspq->desc[rspq->cidx]; 2856 int budget_left = budget; 2857 unsigned int sleeping = 0; 2858 #if defined(INET6) || defined(INET) 2859 int lro_enabled = qs->lro.enabled; 2860 int skip_lro; 2861 struct lro_ctrl *lro_ctrl = &qs->lro.ctrl; 2862 #endif 2863 struct t3_mbuf_hdr *mh = &rspq->rspq_mh; 2864 #ifdef DEBUG 2865 static int last_holdoff = 0; 2866 if (cxgb_debug && rspq->holdoff_tmr != last_holdoff) { 2867 printf("next_holdoff=%d\n", rspq->holdoff_tmr); 2868 last_holdoff = rspq->holdoff_tmr; 2869 } 2870 #endif 2871 rspq->next_holdoff = rspq->holdoff_tmr; 2872 2873 while (__predict_true(budget_left && is_new_response(r, rspq))) { 2874 int eth, eop = 0, ethpad = 0; 2875 uint32_t flags = ntohl(r->flags); 2876 uint32_t rss_hash = be32toh(r->rss_hdr.rss_hash_val); 2877 uint8_t opcode = r->rss_hdr.opcode; 2878 2879 eth = (opcode == CPL_RX_PKT); 2880 2881 if (__predict_false(flags & F_RSPD_ASYNC_NOTIF)) { 2882 struct mbuf *m; 2883 2884 if (cxgb_debug) 2885 printf("async notification\n"); 2886 2887 if (mh->mh_head == NULL) { 2888 mh->mh_head = m_gethdr(M_NOWAIT, MT_DATA); 2889 m = mh->mh_head; 2890 } else { 2891 m = m_gethdr(M_NOWAIT, MT_DATA); 2892 } 2893 if (m == NULL) 2894 goto no_mem; 2895 2896 memcpy(mtod(m, char *), r, AN_PKT_SIZE); 2897 m->m_len = m->m_pkthdr.len = AN_PKT_SIZE; 2898 *mtod(m, uint8_t *) = CPL_ASYNC_NOTIF; 2899 opcode = CPL_ASYNC_NOTIF; 2900 eop = 1; 2901 rspq->async_notif++; 2902 goto skip; 2903 } else if (flags & F_RSPD_IMM_DATA_VALID) { 2904 struct mbuf *m = m_gethdr(M_NOWAIT, MT_DATA); 2905 2906 if (m == NULL) { 2907 no_mem: 2908 rspq->next_holdoff = NOMEM_INTR_DELAY; 2909 budget_left--; 2910 break; 2911 } 2912 if (mh->mh_head == NULL) 2913 mh->mh_head = m; 2914 else 2915 mh->mh_tail->m_next = m; 2916 mh->mh_tail = m; 2917 2918 get_imm_packet(adap, r, m); 2919 mh->mh_head->m_pkthdr.len += m->m_len; 2920 eop = 1; 2921 rspq->imm_data++; 2922 } else if (r->len_cq) { 2923 int drop_thresh = eth ? SGE_RX_DROP_THRES : 0; 2924 2925 eop = get_packet(adap, drop_thresh, qs, mh, r); 2926 if (eop) { 2927 if (r->rss_hdr.hash_type && !adap->timestamp) { 2928 M_HASHTYPE_SET(mh->mh_head, 2929 M_HASHTYPE_OPAQUE_HASH); 2930 mh->mh_head->m_pkthdr.flowid = rss_hash; 2931 } 2932 } 2933 2934 ethpad = 2; 2935 } else { 2936 rspq->pure_rsps++; 2937 } 2938 skip: 2939 if (flags & RSPD_CTRL_MASK) { 2940 sleeping |= flags & RSPD_GTS_MASK; 2941 handle_rsp_cntrl_info(qs, flags); 2942 } 2943 2944 if (!eth && eop) { 2945 rspq->offload_pkts++; 2946 #ifdef TCP_OFFLOAD 2947 adap->cpl_handler[opcode](qs, r, mh->mh_head); 2948 #else 2949 m_freem(mh->mh_head); 2950 #endif 2951 mh->mh_head = NULL; 2952 } else if (eth && eop) { 2953 struct mbuf *m = mh->mh_head; 2954 2955 t3_rx_eth(adap, m, ethpad); 2956 2957 /* 2958 * The T304 sends incoming packets on any qset. If LRO 2959 * is also enabled, we could end up sending packet up 2960 * lro_ctrl->ifp's input. That is incorrect. 2961 * 2962 * The mbuf's rcvif was derived from the cpl header and 2963 * is accurate. Skip LRO and just use that. 2964 */ 2965 #if defined(INET6) || defined(INET) 2966 skip_lro = __predict_false(qs->port->ifp != m->m_pkthdr.rcvif); 2967 2968 if (lro_enabled && lro_ctrl->lro_cnt && !skip_lro 2969 && (tcp_lro_rx(lro_ctrl, m, 0) == 0) 2970 ) { 2971 /* successfully queue'd for LRO */ 2972 } else 2973 #endif 2974 { 2975 /* 2976 * LRO not enabled, packet unsuitable for LRO, 2977 * or unable to queue. Pass it up right now in 2978 * either case. 2979 */ 2980 struct ifnet *ifp = m->m_pkthdr.rcvif; 2981 (*ifp->if_input)(ifp, m); 2982 } 2983 mh->mh_head = NULL; 2984 2985 } 2986 2987 r++; 2988 if (__predict_false(++rspq->cidx == rspq->size)) { 2989 rspq->cidx = 0; 2990 rspq->gen ^= 1; 2991 r = rspq->desc; 2992 } 2993 2994 if (++rspq->credits >= 64) { 2995 refill_rspq(adap, rspq, rspq->credits); 2996 rspq->credits = 0; 2997 } 2998 __refill_fl_lt(adap, &qs->fl[0], 32); 2999 __refill_fl_lt(adap, &qs->fl[1], 32); 3000 --budget_left; 3001 } 3002 3003 #if defined(INET6) || defined(INET) 3004 /* Flush LRO */ 3005 tcp_lro_flush_all(lro_ctrl); 3006 #endif 3007 3008 if (sleeping) 3009 check_ring_db(adap, qs, sleeping); 3010 3011 mb(); /* commit Tx queue processed updates */ 3012 if (__predict_false(qs->txq_stopped > 1)) 3013 restart_tx(qs); 3014 3015 __refill_fl_lt(adap, &qs->fl[0], 512); 3016 __refill_fl_lt(adap, &qs->fl[1], 512); 3017 budget -= budget_left; 3018 return (budget); 3019 } 3020 3021 /* 3022 * A helper function that processes responses and issues GTS. 3023 */ 3024 static __inline int 3025 process_responses_gts(adapter_t *adap, struct sge_rspq *rq) 3026 { 3027 int work; 3028 static int last_holdoff = 0; 3029 3030 work = process_responses(adap, rspq_to_qset(rq), -1); 3031 3032 if (cxgb_debug && (rq->next_holdoff != last_holdoff)) { 3033 printf("next_holdoff=%d\n", rq->next_holdoff); 3034 last_holdoff = rq->next_holdoff; 3035 } 3036 t3_write_reg(adap, A_SG_GTS, V_RSPQ(rq->cntxt_id) | 3037 V_NEWTIMER(rq->next_holdoff) | V_NEWINDEX(rq->cidx)); 3038 3039 return (work); 3040 } 3041 3042 #ifdef DEBUGNET 3043 int 3044 cxgb_debugnet_poll_rx(adapter_t *adap, struct sge_qset *qs) 3045 { 3046 3047 return (process_responses_gts(adap, &qs->rspq)); 3048 } 3049 #endif 3050 3051 /* 3052 * Interrupt handler for legacy INTx interrupts for T3B-based cards. 3053 * Handles data events from SGE response queues as well as error and other 3054 * async events as they all use the same interrupt pin. We use one SGE 3055 * response queue per port in this mode and protect all response queues with 3056 * queue 0's lock. 3057 */ 3058 void 3059 t3b_intr(void *data) 3060 { 3061 uint32_t i, map; 3062 adapter_t *adap = data; 3063 struct sge_rspq *q0 = &adap->sge.qs[0].rspq; 3064 3065 t3_write_reg(adap, A_PL_CLI, 0); 3066 map = t3_read_reg(adap, A_SG_DATA_INTR); 3067 3068 if (!map) 3069 return; 3070 3071 if (__predict_false(map & F_ERRINTR)) { 3072 t3_write_reg(adap, A_PL_INT_ENABLE0, 0); 3073 (void) t3_read_reg(adap, A_PL_INT_ENABLE0); 3074 taskqueue_enqueue(adap->tq, &adap->slow_intr_task); 3075 } 3076 3077 mtx_lock(&q0->lock); 3078 for_each_port(adap, i) 3079 if (map & (1 << i)) 3080 process_responses_gts(adap, &adap->sge.qs[i].rspq); 3081 mtx_unlock(&q0->lock); 3082 } 3083 3084 /* 3085 * The MSI interrupt handler. This needs to handle data events from SGE 3086 * response queues as well as error and other async events as they all use 3087 * the same MSI vector. We use one SGE response queue per port in this mode 3088 * and protect all response queues with queue 0's lock. 3089 */ 3090 void 3091 t3_intr_msi(void *data) 3092 { 3093 adapter_t *adap = data; 3094 struct sge_rspq *q0 = &adap->sge.qs[0].rspq; 3095 int i, new_packets = 0; 3096 3097 mtx_lock(&q0->lock); 3098 3099 for_each_port(adap, i) 3100 if (process_responses_gts(adap, &adap->sge.qs[i].rspq)) 3101 new_packets = 1; 3102 mtx_unlock(&q0->lock); 3103 if (new_packets == 0) { 3104 t3_write_reg(adap, A_PL_INT_ENABLE0, 0); 3105 (void) t3_read_reg(adap, A_PL_INT_ENABLE0); 3106 taskqueue_enqueue(adap->tq, &adap->slow_intr_task); 3107 } 3108 } 3109 3110 void 3111 t3_intr_msix(void *data) 3112 { 3113 struct sge_qset *qs = data; 3114 adapter_t *adap = qs->port->adapter; 3115 struct sge_rspq *rspq = &qs->rspq; 3116 3117 if (process_responses_gts(adap, rspq) == 0) 3118 rspq->unhandled_irqs++; 3119 } 3120 3121 #define QDUMP_SBUF_SIZE 32 * 400 3122 static int 3123 t3_dump_rspq(SYSCTL_HANDLER_ARGS) 3124 { 3125 struct sge_rspq *rspq; 3126 struct sge_qset *qs; 3127 int i, err, dump_end, idx; 3128 struct sbuf *sb; 3129 struct rsp_desc *rspd; 3130 uint32_t data[4]; 3131 3132 rspq = arg1; 3133 qs = rspq_to_qset(rspq); 3134 if (rspq->rspq_dump_count == 0) 3135 return (0); 3136 if (rspq->rspq_dump_count > RSPQ_Q_SIZE) { 3137 log(LOG_WARNING, 3138 "dump count is too large %d\n", rspq->rspq_dump_count); 3139 rspq->rspq_dump_count = 0; 3140 return (EINVAL); 3141 } 3142 if (rspq->rspq_dump_start > (RSPQ_Q_SIZE-1)) { 3143 log(LOG_WARNING, 3144 "dump start of %d is greater than queue size\n", 3145 rspq->rspq_dump_start); 3146 rspq->rspq_dump_start = 0; 3147 return (EINVAL); 3148 } 3149 err = t3_sge_read_rspq(qs->port->adapter, rspq->cntxt_id, data); 3150 if (err) 3151 return (err); 3152 err = sysctl_wire_old_buffer(req, 0); 3153 if (err) 3154 return (err); 3155 sb = sbuf_new_for_sysctl(NULL, NULL, QDUMP_SBUF_SIZE, req); 3156 3157 sbuf_printf(sb, " \n index=%u size=%u MSI-X/RspQ=%u intr enable=%u intr armed=%u\n", 3158 (data[0] & 0xffff), data[0] >> 16, ((data[2] >> 20) & 0x3f), 3159 ((data[2] >> 26) & 1), ((data[2] >> 27) & 1)); 3160 sbuf_printf(sb, " generation=%u CQ mode=%u FL threshold=%u\n", 3161 ((data[2] >> 28) & 1), ((data[2] >> 31) & 1), data[3]); 3162 3163 sbuf_printf(sb, " start=%d -> end=%d\n", rspq->rspq_dump_start, 3164 (rspq->rspq_dump_start + rspq->rspq_dump_count) & (RSPQ_Q_SIZE-1)); 3165 3166 dump_end = rspq->rspq_dump_start + rspq->rspq_dump_count; 3167 for (i = rspq->rspq_dump_start; i < dump_end; i++) { 3168 idx = i & (RSPQ_Q_SIZE-1); 3169 3170 rspd = &rspq->desc[idx]; 3171 sbuf_printf(sb, "\tidx=%04d opcode=%02x cpu_idx=%x hash_type=%x cq_idx=%x\n", 3172 idx, rspd->rss_hdr.opcode, rspd->rss_hdr.cpu_idx, 3173 rspd->rss_hdr.hash_type, be16toh(rspd->rss_hdr.cq_idx)); 3174 sbuf_printf(sb, "\trss_hash_val=%x flags=%08x len_cq=%x intr_gen=%x\n", 3175 rspd->rss_hdr.rss_hash_val, be32toh(rspd->flags), 3176 be32toh(rspd->len_cq), rspd->intr_gen); 3177 } 3178 3179 err = sbuf_finish(sb); 3180 sbuf_delete(sb); 3181 return (err); 3182 } 3183 3184 static int 3185 t3_dump_txq_eth(SYSCTL_HANDLER_ARGS) 3186 { 3187 struct sge_txq *txq; 3188 struct sge_qset *qs; 3189 int i, j, err, dump_end; 3190 struct sbuf *sb; 3191 struct tx_desc *txd; 3192 uint32_t *WR, wr_hi, wr_lo, gen; 3193 uint32_t data[4]; 3194 3195 txq = arg1; 3196 qs = txq_to_qset(txq, TXQ_ETH); 3197 if (txq->txq_dump_count == 0) { 3198 return (0); 3199 } 3200 if (txq->txq_dump_count > TX_ETH_Q_SIZE) { 3201 log(LOG_WARNING, 3202 "dump count is too large %d\n", txq->txq_dump_count); 3203 txq->txq_dump_count = 1; 3204 return (EINVAL); 3205 } 3206 if (txq->txq_dump_start > (TX_ETH_Q_SIZE-1)) { 3207 log(LOG_WARNING, 3208 "dump start of %d is greater than queue size\n", 3209 txq->txq_dump_start); 3210 txq->txq_dump_start = 0; 3211 return (EINVAL); 3212 } 3213 err = t3_sge_read_ecntxt(qs->port->adapter, qs->rspq.cntxt_id, data); 3214 if (err) 3215 return (err); 3216 err = sysctl_wire_old_buffer(req, 0); 3217 if (err) 3218 return (err); 3219 sb = sbuf_new_for_sysctl(NULL, NULL, QDUMP_SBUF_SIZE, req); 3220 3221 sbuf_printf(sb, " \n credits=%u GTS=%u index=%u size=%u rspq#=%u cmdq#=%u\n", 3222 (data[0] & 0x7fff), ((data[0] >> 15) & 1), (data[0] >> 16), 3223 (data[1] & 0xffff), ((data[3] >> 4) & 7), ((data[3] >> 7) & 1)); 3224 sbuf_printf(sb, " TUN=%u TOE=%u generation%u uP token=%u valid=%u\n", 3225 ((data[3] >> 8) & 1), ((data[3] >> 9) & 1), ((data[3] >> 10) & 1), 3226 ((data[3] >> 11) & 0xfffff), ((data[3] >> 31) & 1)); 3227 sbuf_printf(sb, " qid=%d start=%d -> end=%d\n", qs->idx, 3228 txq->txq_dump_start, 3229 (txq->txq_dump_start + txq->txq_dump_count) & (TX_ETH_Q_SIZE-1)); 3230 3231 dump_end = txq->txq_dump_start + txq->txq_dump_count; 3232 for (i = txq->txq_dump_start; i < dump_end; i++) { 3233 txd = &txq->desc[i & (TX_ETH_Q_SIZE-1)]; 3234 WR = (uint32_t *)txd->flit; 3235 wr_hi = ntohl(WR[0]); 3236 wr_lo = ntohl(WR[1]); 3237 gen = G_WR_GEN(wr_lo); 3238 3239 sbuf_printf(sb," wr_hi %08x wr_lo %08x gen %d\n", 3240 wr_hi, wr_lo, gen); 3241 for (j = 2; j < 30; j += 4) 3242 sbuf_printf(sb, "\t%08x %08x %08x %08x \n", 3243 WR[j], WR[j + 1], WR[j + 2], WR[j + 3]); 3244 3245 } 3246 err = sbuf_finish(sb); 3247 sbuf_delete(sb); 3248 return (err); 3249 } 3250 3251 static int 3252 t3_dump_txq_ctrl(SYSCTL_HANDLER_ARGS) 3253 { 3254 struct sge_txq *txq; 3255 struct sge_qset *qs; 3256 int i, j, err, dump_end; 3257 struct sbuf *sb; 3258 struct tx_desc *txd; 3259 uint32_t *WR, wr_hi, wr_lo, gen; 3260 3261 txq = arg1; 3262 qs = txq_to_qset(txq, TXQ_CTRL); 3263 if (txq->txq_dump_count == 0) { 3264 return (0); 3265 } 3266 if (txq->txq_dump_count > 256) { 3267 log(LOG_WARNING, 3268 "dump count is too large %d\n", txq->txq_dump_count); 3269 txq->txq_dump_count = 1; 3270 return (EINVAL); 3271 } 3272 if (txq->txq_dump_start > 255) { 3273 log(LOG_WARNING, 3274 "dump start of %d is greater than queue size\n", 3275 txq->txq_dump_start); 3276 txq->txq_dump_start = 0; 3277 return (EINVAL); 3278 } 3279 3280 err = sysctl_wire_old_buffer(req, 0); 3281 if (err != 0) 3282 return (err); 3283 sb = sbuf_new_for_sysctl(NULL, NULL, QDUMP_SBUF_SIZE, req); 3284 sbuf_printf(sb, " qid=%d start=%d -> end=%d\n", qs->idx, 3285 txq->txq_dump_start, 3286 (txq->txq_dump_start + txq->txq_dump_count) & 255); 3287 3288 dump_end = txq->txq_dump_start + txq->txq_dump_count; 3289 for (i = txq->txq_dump_start; i < dump_end; i++) { 3290 txd = &txq->desc[i & (255)]; 3291 WR = (uint32_t *)txd->flit; 3292 wr_hi = ntohl(WR[0]); 3293 wr_lo = ntohl(WR[1]); 3294 gen = G_WR_GEN(wr_lo); 3295 3296 sbuf_printf(sb," wr_hi %08x wr_lo %08x gen %d\n", 3297 wr_hi, wr_lo, gen); 3298 for (j = 2; j < 30; j += 4) 3299 sbuf_printf(sb, "\t%08x %08x %08x %08x \n", 3300 WR[j], WR[j + 1], WR[j + 2], WR[j + 3]); 3301 3302 } 3303 err = sbuf_finish(sb); 3304 sbuf_delete(sb); 3305 return (err); 3306 } 3307 3308 static int 3309 t3_set_coalesce_usecs(SYSCTL_HANDLER_ARGS) 3310 { 3311 adapter_t *sc = arg1; 3312 struct qset_params *qsp = &sc->params.sge.qset[0]; 3313 int coalesce_usecs; 3314 struct sge_qset *qs; 3315 int i, j, err, nqsets = 0; 3316 struct mtx *lock; 3317 3318 if ((sc->flags & FULL_INIT_DONE) == 0) 3319 return (ENXIO); 3320 3321 coalesce_usecs = qsp->coalesce_usecs; 3322 err = sysctl_handle_int(oidp, &coalesce_usecs, arg2, req); 3323 3324 if (err != 0) { 3325 return (err); 3326 } 3327 if (coalesce_usecs == qsp->coalesce_usecs) 3328 return (0); 3329 3330 for (i = 0; i < sc->params.nports; i++) 3331 for (j = 0; j < sc->port[i].nqsets; j++) 3332 nqsets++; 3333 3334 coalesce_usecs = max(1, coalesce_usecs); 3335 3336 for (i = 0; i < nqsets; i++) { 3337 qs = &sc->sge.qs[i]; 3338 qsp = &sc->params.sge.qset[i]; 3339 qsp->coalesce_usecs = coalesce_usecs; 3340 3341 lock = (sc->flags & USING_MSIX) ? &qs->rspq.lock : 3342 &sc->sge.qs[0].rspq.lock; 3343 3344 mtx_lock(lock); 3345 t3_update_qset_coalesce(qs, qsp); 3346 t3_write_reg(sc, A_SG_GTS, V_RSPQ(qs->rspq.cntxt_id) | 3347 V_NEWTIMER(qs->rspq.holdoff_tmr)); 3348 mtx_unlock(lock); 3349 } 3350 3351 return (0); 3352 } 3353 3354 static int 3355 t3_pkt_timestamp(SYSCTL_HANDLER_ARGS) 3356 { 3357 adapter_t *sc = arg1; 3358 int rc, timestamp; 3359 3360 if ((sc->flags & FULL_INIT_DONE) == 0) 3361 return (ENXIO); 3362 3363 timestamp = sc->timestamp; 3364 rc = sysctl_handle_int(oidp, ×tamp, arg2, req); 3365 3366 if (rc != 0) 3367 return (rc); 3368 3369 if (timestamp != sc->timestamp) { 3370 t3_set_reg_field(sc, A_TP_PC_CONFIG2, F_ENABLERXPKTTMSTPRSS, 3371 timestamp ? F_ENABLERXPKTTMSTPRSS : 0); 3372 sc->timestamp = timestamp; 3373 } 3374 3375 return (0); 3376 } 3377 3378 void 3379 t3_add_attach_sysctls(adapter_t *sc) 3380 { 3381 struct sysctl_ctx_list *ctx; 3382 struct sysctl_oid_list *children; 3383 3384 ctx = device_get_sysctl_ctx(sc->dev); 3385 children = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->dev)); 3386 3387 /* random information */ 3388 SYSCTL_ADD_STRING(ctx, children, OID_AUTO, 3389 "firmware_version", 3390 CTLFLAG_RD, sc->fw_version, 3391 0, "firmware version"); 3392 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, 3393 "hw_revision", 3394 CTLFLAG_RD, &sc->params.rev, 3395 0, "chip model"); 3396 SYSCTL_ADD_STRING(ctx, children, OID_AUTO, 3397 "port_types", 3398 CTLFLAG_RD, sc->port_types, 3399 0, "type of ports"); 3400 SYSCTL_ADD_INT(ctx, children, OID_AUTO, 3401 "enable_debug", 3402 CTLFLAG_RW, &cxgb_debug, 3403 0, "enable verbose debugging output"); 3404 SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, "tunq_coalesce", 3405 CTLFLAG_RD, &sc->tunq_coalesce, 3406 "#tunneled packets freed"); 3407 SYSCTL_ADD_INT(ctx, children, OID_AUTO, 3408 "txq_overrun", 3409 CTLFLAG_RD, &txq_fills, 3410 0, "#times txq overrun"); 3411 SYSCTL_ADD_UINT(ctx, children, OID_AUTO, 3412 "core_clock", 3413 CTLFLAG_RD, &sc->params.vpd.cclk, 3414 0, "core clock frequency (in KHz)"); 3415 } 3416 3417 3418 static const char *rspq_name = "rspq"; 3419 static const char *txq_names[] = 3420 { 3421 "txq_eth", 3422 "txq_ofld", 3423 "txq_ctrl" 3424 }; 3425 3426 static int 3427 sysctl_handle_macstat(SYSCTL_HANDLER_ARGS) 3428 { 3429 struct port_info *p = arg1; 3430 uint64_t *parg; 3431 3432 if (!p) 3433 return (EINVAL); 3434 3435 cxgb_refresh_stats(p); 3436 parg = (uint64_t *) ((uint8_t *)&p->mac.stats + arg2); 3437 3438 return (sysctl_handle_64(oidp, parg, 0, req)); 3439 } 3440 3441 void 3442 t3_add_configured_sysctls(adapter_t *sc) 3443 { 3444 struct sysctl_ctx_list *ctx; 3445 struct sysctl_oid_list *children; 3446 int i, j; 3447 3448 ctx = device_get_sysctl_ctx(sc->dev); 3449 children = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->dev)); 3450 3451 SYSCTL_ADD_PROC(ctx, children, OID_AUTO, 3452 "intr_coal", 3453 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, sc, 3454 0, t3_set_coalesce_usecs, 3455 "I", "interrupt coalescing timer (us)"); 3456 3457 SYSCTL_ADD_PROC(ctx, children, OID_AUTO, 3458 "pkt_timestamp", 3459 CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_NEEDGIANT, sc, 3460 0, t3_pkt_timestamp, 3461 "I", "provide packet timestamp instead of connection hash"); 3462 3463 for (i = 0; i < sc->params.nports; i++) { 3464 struct port_info *pi = &sc->port[i]; 3465 struct sysctl_oid *poid; 3466 struct sysctl_oid_list *poidlist; 3467 struct mac_stats *mstats = &pi->mac.stats; 3468 3469 snprintf(pi->namebuf, PORT_NAME_LEN, "port%d", i); 3470 poid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, 3471 pi->namebuf, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 3472 "port statistics"); 3473 poidlist = SYSCTL_CHILDREN(poid); 3474 SYSCTL_ADD_UINT(ctx, poidlist, OID_AUTO, 3475 "nqsets", CTLFLAG_RD, &pi->nqsets, 3476 0, "#queue sets"); 3477 3478 for (j = 0; j < pi->nqsets; j++) { 3479 struct sge_qset *qs = &sc->sge.qs[pi->first_qset + j]; 3480 struct sysctl_oid *qspoid, *rspqpoid, *txqpoid, 3481 *ctrlqpoid, *lropoid; 3482 struct sysctl_oid_list *qspoidlist, *rspqpoidlist, 3483 *txqpoidlist, *ctrlqpoidlist, 3484 *lropoidlist; 3485 struct sge_txq *txq = &qs->txq[TXQ_ETH]; 3486 3487 snprintf(qs->namebuf, QS_NAME_LEN, "qs%d", j); 3488 3489 qspoid = SYSCTL_ADD_NODE(ctx, poidlist, OID_AUTO, 3490 qs->namebuf, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 3491 "qset statistics"); 3492 qspoidlist = SYSCTL_CHILDREN(qspoid); 3493 3494 SYSCTL_ADD_UINT(ctx, qspoidlist, OID_AUTO, "fl0_empty", 3495 CTLFLAG_RD, &qs->fl[0].empty, 0, 3496 "freelist #0 empty"); 3497 SYSCTL_ADD_UINT(ctx, qspoidlist, OID_AUTO, "fl1_empty", 3498 CTLFLAG_RD, &qs->fl[1].empty, 0, 3499 "freelist #1 empty"); 3500 3501 rspqpoid = SYSCTL_ADD_NODE(ctx, qspoidlist, OID_AUTO, 3502 rspq_name, CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 3503 "rspq statistics"); 3504 rspqpoidlist = SYSCTL_CHILDREN(rspqpoid); 3505 3506 txqpoid = SYSCTL_ADD_NODE(ctx, qspoidlist, OID_AUTO, 3507 txq_names[0], CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 3508 "txq statistics"); 3509 txqpoidlist = SYSCTL_CHILDREN(txqpoid); 3510 3511 ctrlqpoid = SYSCTL_ADD_NODE(ctx, qspoidlist, OID_AUTO, 3512 txq_names[2], CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 3513 "ctrlq statistics"); 3514 ctrlqpoidlist = SYSCTL_CHILDREN(ctrlqpoid); 3515 3516 lropoid = SYSCTL_ADD_NODE(ctx, qspoidlist, OID_AUTO, 3517 "lro_stats", CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 3518 "LRO statistics"); 3519 lropoidlist = SYSCTL_CHILDREN(lropoid); 3520 3521 SYSCTL_ADD_UINT(ctx, rspqpoidlist, OID_AUTO, "size", 3522 CTLFLAG_RD, &qs->rspq.size, 3523 0, "#entries in response queue"); 3524 SYSCTL_ADD_UINT(ctx, rspqpoidlist, OID_AUTO, "cidx", 3525 CTLFLAG_RD, &qs->rspq.cidx, 3526 0, "consumer index"); 3527 SYSCTL_ADD_UINT(ctx, rspqpoidlist, OID_AUTO, "credits", 3528 CTLFLAG_RD, &qs->rspq.credits, 3529 0, "#credits"); 3530 SYSCTL_ADD_UINT(ctx, rspqpoidlist, OID_AUTO, "starved", 3531 CTLFLAG_RD, &qs->rspq.starved, 3532 0, "#times starved"); 3533 SYSCTL_ADD_UAUTO(ctx, rspqpoidlist, OID_AUTO, "phys_addr", 3534 CTLFLAG_RD, &qs->rspq.phys_addr, 3535 "physical_address_of the queue"); 3536 SYSCTL_ADD_UINT(ctx, rspqpoidlist, OID_AUTO, "dump_start", 3537 CTLFLAG_RW, &qs->rspq.rspq_dump_start, 3538 0, "start rspq dump entry"); 3539 SYSCTL_ADD_UINT(ctx, rspqpoidlist, OID_AUTO, "dump_count", 3540 CTLFLAG_RW, &qs->rspq.rspq_dump_count, 3541 0, "#rspq entries to dump"); 3542 SYSCTL_ADD_PROC(ctx, rspqpoidlist, OID_AUTO, "qdump", 3543 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, 3544 &qs->rspq, 0, t3_dump_rspq, "A", 3545 "dump of the response queue"); 3546 3547 SYSCTL_ADD_UQUAD(ctx, txqpoidlist, OID_AUTO, "dropped", 3548 CTLFLAG_RD, &qs->txq[TXQ_ETH].txq_mr->br_drops, 3549 "#tunneled packets dropped"); 3550 SYSCTL_ADD_UINT(ctx, txqpoidlist, OID_AUTO, "sendqlen", 3551 CTLFLAG_RD, &qs->txq[TXQ_ETH].sendq.mq_len, 3552 0, "#tunneled packets waiting to be sent"); 3553 #if 0 3554 SYSCTL_ADD_UINT(ctx, txqpoidlist, OID_AUTO, "queue_pidx", 3555 CTLFLAG_RD, (uint32_t *)(uintptr_t)&qs->txq[TXQ_ETH].txq_mr.br_prod, 3556 0, "#tunneled packets queue producer index"); 3557 SYSCTL_ADD_UINT(ctx, txqpoidlist, OID_AUTO, "queue_cidx", 3558 CTLFLAG_RD, (uint32_t *)(uintptr_t)&qs->txq[TXQ_ETH].txq_mr.br_cons, 3559 0, "#tunneled packets queue consumer index"); 3560 #endif 3561 SYSCTL_ADD_UINT(ctx, txqpoidlist, OID_AUTO, "processed", 3562 CTLFLAG_RD, &qs->txq[TXQ_ETH].processed, 3563 0, "#tunneled packets processed by the card"); 3564 SYSCTL_ADD_UINT(ctx, txqpoidlist, OID_AUTO, "cleaned", 3565 CTLFLAG_RD, &txq->cleaned, 3566 0, "#tunneled packets cleaned"); 3567 SYSCTL_ADD_UINT(ctx, txqpoidlist, OID_AUTO, "in_use", 3568 CTLFLAG_RD, &txq->in_use, 3569 0, "#tunneled packet slots in use"); 3570 SYSCTL_ADD_UQUAD(ctx, txqpoidlist, OID_AUTO, "frees", 3571 CTLFLAG_RD, &txq->txq_frees, 3572 "#tunneled packets freed"); 3573 SYSCTL_ADD_UINT(ctx, txqpoidlist, OID_AUTO, "skipped", 3574 CTLFLAG_RD, &txq->txq_skipped, 3575 0, "#tunneled packet descriptors skipped"); 3576 SYSCTL_ADD_UQUAD(ctx, txqpoidlist, OID_AUTO, "coalesced", 3577 CTLFLAG_RD, &txq->txq_coalesced, 3578 "#tunneled packets coalesced"); 3579 SYSCTL_ADD_UINT(ctx, txqpoidlist, OID_AUTO, "enqueued", 3580 CTLFLAG_RD, &txq->txq_enqueued, 3581 0, "#tunneled packets enqueued to hardware"); 3582 SYSCTL_ADD_UINT(ctx, txqpoidlist, OID_AUTO, "stopped_flags", 3583 CTLFLAG_RD, &qs->txq_stopped, 3584 0, "tx queues stopped"); 3585 SYSCTL_ADD_UAUTO(ctx, txqpoidlist, OID_AUTO, "phys_addr", 3586 CTLFLAG_RD, &txq->phys_addr, 3587 "physical_address_of the queue"); 3588 SYSCTL_ADD_UINT(ctx, txqpoidlist, OID_AUTO, "qgen", 3589 CTLFLAG_RW, &qs->txq[TXQ_ETH].gen, 3590 0, "txq generation"); 3591 SYSCTL_ADD_UINT(ctx, txqpoidlist, OID_AUTO, "hw_cidx", 3592 CTLFLAG_RD, &txq->cidx, 3593 0, "hardware queue cidx"); 3594 SYSCTL_ADD_UINT(ctx, txqpoidlist, OID_AUTO, "hw_pidx", 3595 CTLFLAG_RD, &txq->pidx, 3596 0, "hardware queue pidx"); 3597 SYSCTL_ADD_UINT(ctx, txqpoidlist, OID_AUTO, "dump_start", 3598 CTLFLAG_RW, &qs->txq[TXQ_ETH].txq_dump_start, 3599 0, "txq start idx for dump"); 3600 SYSCTL_ADD_UINT(ctx, txqpoidlist, OID_AUTO, "dump_count", 3601 CTLFLAG_RW, &qs->txq[TXQ_ETH].txq_dump_count, 3602 0, "txq #entries to dump"); 3603 SYSCTL_ADD_PROC(ctx, txqpoidlist, OID_AUTO, "qdump", 3604 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, 3605 &qs->txq[TXQ_ETH], 0, t3_dump_txq_eth, "A", 3606 "dump of the transmit queue"); 3607 3608 SYSCTL_ADD_UINT(ctx, ctrlqpoidlist, OID_AUTO, "dump_start", 3609 CTLFLAG_RW, &qs->txq[TXQ_CTRL].txq_dump_start, 3610 0, "ctrlq start idx for dump"); 3611 SYSCTL_ADD_UINT(ctx, ctrlqpoidlist, OID_AUTO, "dump_count", 3612 CTLFLAG_RW, &qs->txq[TXQ_CTRL].txq_dump_count, 3613 0, "ctrl #entries to dump"); 3614 SYSCTL_ADD_PROC(ctx, ctrlqpoidlist, OID_AUTO, "qdump", 3615 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT, 3616 &qs->txq[TXQ_CTRL], 0, t3_dump_txq_ctrl, "A", 3617 "dump of the transmit queue"); 3618 3619 SYSCTL_ADD_U64(ctx, lropoidlist, OID_AUTO, "lro_queued", 3620 CTLFLAG_RD, &qs->lro.ctrl.lro_queued, 0, NULL); 3621 SYSCTL_ADD_U64(ctx, lropoidlist, OID_AUTO, "lro_flushed", 3622 CTLFLAG_RD, &qs->lro.ctrl.lro_flushed, 0, NULL); 3623 SYSCTL_ADD_U64(ctx, lropoidlist, OID_AUTO, "lro_bad_csum", 3624 CTLFLAG_RD, &qs->lro.ctrl.lro_bad_csum, 0, NULL); 3625 SYSCTL_ADD_INT(ctx, lropoidlist, OID_AUTO, "lro_cnt", 3626 CTLFLAG_RD, &qs->lro.ctrl.lro_cnt, 0, NULL); 3627 } 3628 3629 /* Now add a node for mac stats. */ 3630 poid = SYSCTL_ADD_NODE(ctx, poidlist, OID_AUTO, "mac_stats", 3631 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "MAC statistics"); 3632 poidlist = SYSCTL_CHILDREN(poid); 3633 3634 /* 3635 * We (ab)use the length argument (arg2) to pass on the offset 3636 * of the data that we are interested in. This is only required 3637 * for the quad counters that are updated from the hardware (we 3638 * make sure that we return the latest value). 3639 * sysctl_handle_macstat first updates *all* the counters from 3640 * the hardware, and then returns the latest value of the 3641 * requested counter. Best would be to update only the 3642 * requested counter from hardware, but t3_mac_update_stats() 3643 * hides all the register details and we don't want to dive into 3644 * all that here. 3645 */ 3646 #define CXGB_SYSCTL_ADD_QUAD(a) SYSCTL_ADD_OID(ctx, poidlist, OID_AUTO, #a, \ 3647 CTLTYPE_U64 | CTLFLAG_RD | CTLFLAG_NEEDGIANT, pi, \ 3648 offsetof(struct mac_stats, a), sysctl_handle_macstat, "QU", 0) 3649 CXGB_SYSCTL_ADD_QUAD(tx_octets); 3650 CXGB_SYSCTL_ADD_QUAD(tx_octets_bad); 3651 CXGB_SYSCTL_ADD_QUAD(tx_frames); 3652 CXGB_SYSCTL_ADD_QUAD(tx_mcast_frames); 3653 CXGB_SYSCTL_ADD_QUAD(tx_bcast_frames); 3654 CXGB_SYSCTL_ADD_QUAD(tx_pause); 3655 CXGB_SYSCTL_ADD_QUAD(tx_deferred); 3656 CXGB_SYSCTL_ADD_QUAD(tx_late_collisions); 3657 CXGB_SYSCTL_ADD_QUAD(tx_total_collisions); 3658 CXGB_SYSCTL_ADD_QUAD(tx_excess_collisions); 3659 CXGB_SYSCTL_ADD_QUAD(tx_underrun); 3660 CXGB_SYSCTL_ADD_QUAD(tx_len_errs); 3661 CXGB_SYSCTL_ADD_QUAD(tx_mac_internal_errs); 3662 CXGB_SYSCTL_ADD_QUAD(tx_excess_deferral); 3663 CXGB_SYSCTL_ADD_QUAD(tx_fcs_errs); 3664 CXGB_SYSCTL_ADD_QUAD(tx_frames_64); 3665 CXGB_SYSCTL_ADD_QUAD(tx_frames_65_127); 3666 CXGB_SYSCTL_ADD_QUAD(tx_frames_128_255); 3667 CXGB_SYSCTL_ADD_QUAD(tx_frames_256_511); 3668 CXGB_SYSCTL_ADD_QUAD(tx_frames_512_1023); 3669 CXGB_SYSCTL_ADD_QUAD(tx_frames_1024_1518); 3670 CXGB_SYSCTL_ADD_QUAD(tx_frames_1519_max); 3671 CXGB_SYSCTL_ADD_QUAD(rx_octets); 3672 CXGB_SYSCTL_ADD_QUAD(rx_octets_bad); 3673 CXGB_SYSCTL_ADD_QUAD(rx_frames); 3674 CXGB_SYSCTL_ADD_QUAD(rx_mcast_frames); 3675 CXGB_SYSCTL_ADD_QUAD(rx_bcast_frames); 3676 CXGB_SYSCTL_ADD_QUAD(rx_pause); 3677 CXGB_SYSCTL_ADD_QUAD(rx_fcs_errs); 3678 CXGB_SYSCTL_ADD_QUAD(rx_align_errs); 3679 CXGB_SYSCTL_ADD_QUAD(rx_symbol_errs); 3680 CXGB_SYSCTL_ADD_QUAD(rx_data_errs); 3681 CXGB_SYSCTL_ADD_QUAD(rx_sequence_errs); 3682 CXGB_SYSCTL_ADD_QUAD(rx_runt); 3683 CXGB_SYSCTL_ADD_QUAD(rx_jabber); 3684 CXGB_SYSCTL_ADD_QUAD(rx_short); 3685 CXGB_SYSCTL_ADD_QUAD(rx_too_long); 3686 CXGB_SYSCTL_ADD_QUAD(rx_mac_internal_errs); 3687 CXGB_SYSCTL_ADD_QUAD(rx_cong_drops); 3688 CXGB_SYSCTL_ADD_QUAD(rx_frames_64); 3689 CXGB_SYSCTL_ADD_QUAD(rx_frames_65_127); 3690 CXGB_SYSCTL_ADD_QUAD(rx_frames_128_255); 3691 CXGB_SYSCTL_ADD_QUAD(rx_frames_256_511); 3692 CXGB_SYSCTL_ADD_QUAD(rx_frames_512_1023); 3693 CXGB_SYSCTL_ADD_QUAD(rx_frames_1024_1518); 3694 CXGB_SYSCTL_ADD_QUAD(rx_frames_1519_max); 3695 #undef CXGB_SYSCTL_ADD_QUAD 3696 3697 #define CXGB_SYSCTL_ADD_ULONG(a) SYSCTL_ADD_ULONG(ctx, poidlist, OID_AUTO, #a, \ 3698 CTLFLAG_RD, &mstats->a, 0) 3699 CXGB_SYSCTL_ADD_ULONG(tx_fifo_parity_err); 3700 CXGB_SYSCTL_ADD_ULONG(rx_fifo_parity_err); 3701 CXGB_SYSCTL_ADD_ULONG(tx_fifo_urun); 3702 CXGB_SYSCTL_ADD_ULONG(rx_fifo_ovfl); 3703 CXGB_SYSCTL_ADD_ULONG(serdes_signal_loss); 3704 CXGB_SYSCTL_ADD_ULONG(xaui_pcs_ctc_err); 3705 CXGB_SYSCTL_ADD_ULONG(xaui_pcs_align_change); 3706 CXGB_SYSCTL_ADD_ULONG(num_toggled); 3707 CXGB_SYSCTL_ADD_ULONG(num_resets); 3708 CXGB_SYSCTL_ADD_ULONG(link_faults); 3709 #undef CXGB_SYSCTL_ADD_ULONG 3710 } 3711 } 3712 3713 /** 3714 * t3_get_desc - dump an SGE descriptor for debugging purposes 3715 * @qs: the queue set 3716 * @qnum: identifies the specific queue (0..2: Tx, 3:response, 4..5: Rx) 3717 * @idx: the descriptor index in the queue 3718 * @data: where to dump the descriptor contents 3719 * 3720 * Dumps the contents of a HW descriptor of an SGE queue. Returns the 3721 * size of the descriptor. 3722 */ 3723 int 3724 t3_get_desc(const struct sge_qset *qs, unsigned int qnum, unsigned int idx, 3725 unsigned char *data) 3726 { 3727 if (qnum >= 6) 3728 return (EINVAL); 3729 3730 if (qnum < 3) { 3731 if (!qs->txq[qnum].desc || idx >= qs->txq[qnum].size) 3732 return -EINVAL; 3733 memcpy(data, &qs->txq[qnum].desc[idx], sizeof(struct tx_desc)); 3734 return sizeof(struct tx_desc); 3735 } 3736 3737 if (qnum == 3) { 3738 if (!qs->rspq.desc || idx >= qs->rspq.size) 3739 return (EINVAL); 3740 memcpy(data, &qs->rspq.desc[idx], sizeof(struct rsp_desc)); 3741 return sizeof(struct rsp_desc); 3742 } 3743 3744 qnum -= 4; 3745 if (!qs->fl[qnum].desc || idx >= qs->fl[qnum].size) 3746 return (EINVAL); 3747 memcpy(data, &qs->fl[qnum].desc[idx], sizeof(struct rx_desc)); 3748 return sizeof(struct rx_desc); 3749 } 3750