1 /* 2 * Copyright (c) 2012, 2013 Intel Corporation. All rights reserved. 3 * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved. 4 * Copyright (c) 2005, 2006 PathScale, Inc. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35 #include <rdma/ib_mad.h> 36 #include <rdma/ib_user_verbs.h> 37 #include <linux/io.h> 38 #include <linux/module.h> 39 #include <linux/utsname.h> 40 #include <linux/rculist.h> 41 #include <linux/mm.h> 42 #include <linux/random.h> 43 #include <linux/vmalloc.h> 44 #include <rdma/rdma_vt.h> 45 46 #include "qib.h" 47 #include "qib_common.h" 48 49 static unsigned int ib_qib_qp_table_size = 256; 50 module_param_named(qp_table_size, ib_qib_qp_table_size, uint, S_IRUGO); 51 MODULE_PARM_DESC(qp_table_size, "QP table size"); 52 53 static unsigned int qib_lkey_table_size = 16; 54 module_param_named(lkey_table_size, qib_lkey_table_size, uint, 55 S_IRUGO); 56 MODULE_PARM_DESC(lkey_table_size, 57 "LKEY table size in bits (2^n, 1 <= n <= 23)"); 58 59 static unsigned int ib_qib_max_pds = 0xFFFF; 60 module_param_named(max_pds, ib_qib_max_pds, uint, S_IRUGO); 61 MODULE_PARM_DESC(max_pds, 62 "Maximum number of protection domains to support"); 63 64 static unsigned int ib_qib_max_ahs = 0xFFFF; 65 module_param_named(max_ahs, ib_qib_max_ahs, uint, S_IRUGO); 66 MODULE_PARM_DESC(max_ahs, "Maximum number of address handles to support"); 67 68 unsigned int ib_qib_max_cqes = 0x2FFFF; 69 module_param_named(max_cqes, ib_qib_max_cqes, uint, S_IRUGO); 70 MODULE_PARM_DESC(max_cqes, 71 "Maximum number of completion queue entries to support"); 72 73 unsigned int ib_qib_max_cqs = 0x1FFFF; 74 module_param_named(max_cqs, ib_qib_max_cqs, uint, S_IRUGO); 75 MODULE_PARM_DESC(max_cqs, "Maximum number of completion queues to support"); 76 77 unsigned int ib_qib_max_qp_wrs = 0x3FFF; 78 module_param_named(max_qp_wrs, ib_qib_max_qp_wrs, uint, S_IRUGO); 79 MODULE_PARM_DESC(max_qp_wrs, "Maximum number of QP WRs to support"); 80 81 unsigned int ib_qib_max_qps = 16384; 82 module_param_named(max_qps, ib_qib_max_qps, uint, S_IRUGO); 83 MODULE_PARM_DESC(max_qps, "Maximum number of QPs to support"); 84 85 unsigned int ib_qib_max_sges = 0x60; 86 module_param_named(max_sges, ib_qib_max_sges, uint, S_IRUGO); 87 MODULE_PARM_DESC(max_sges, "Maximum number of SGEs to support"); 88 89 unsigned int ib_qib_max_mcast_grps = 16384; 90 module_param_named(max_mcast_grps, ib_qib_max_mcast_grps, uint, S_IRUGO); 91 MODULE_PARM_DESC(max_mcast_grps, 92 "Maximum number of multicast groups to support"); 93 94 unsigned int ib_qib_max_mcast_qp_attached = 16; 95 module_param_named(max_mcast_qp_attached, ib_qib_max_mcast_qp_attached, 96 uint, S_IRUGO); 97 MODULE_PARM_DESC(max_mcast_qp_attached, 98 "Maximum number of attached QPs to support"); 99 100 unsigned int ib_qib_max_srqs = 1024; 101 module_param_named(max_srqs, ib_qib_max_srqs, uint, S_IRUGO); 102 MODULE_PARM_DESC(max_srqs, "Maximum number of SRQs to support"); 103 104 unsigned int ib_qib_max_srq_sges = 128; 105 module_param_named(max_srq_sges, ib_qib_max_srq_sges, uint, S_IRUGO); 106 MODULE_PARM_DESC(max_srq_sges, "Maximum number of SRQ SGEs to support"); 107 108 unsigned int ib_qib_max_srq_wrs = 0x1FFFF; 109 module_param_named(max_srq_wrs, ib_qib_max_srq_wrs, uint, S_IRUGO); 110 MODULE_PARM_DESC(max_srq_wrs, "Maximum number of SRQ WRs support"); 111 112 static unsigned int ib_qib_disable_sma; 113 module_param_named(disable_sma, ib_qib_disable_sma, uint, S_IWUSR | S_IRUGO); 114 MODULE_PARM_DESC(disable_sma, "Disable the SMA"); 115 116 /* 117 * Translate ib_wr_opcode into ib_wc_opcode. 118 */ 119 const enum ib_wc_opcode ib_qib_wc_opcode[] = { 120 [IB_WR_RDMA_WRITE] = IB_WC_RDMA_WRITE, 121 [IB_WR_RDMA_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE, 122 [IB_WR_SEND] = IB_WC_SEND, 123 [IB_WR_SEND_WITH_IMM] = IB_WC_SEND, 124 [IB_WR_RDMA_READ] = IB_WC_RDMA_READ, 125 [IB_WR_ATOMIC_CMP_AND_SWP] = IB_WC_COMP_SWAP, 126 [IB_WR_ATOMIC_FETCH_AND_ADD] = IB_WC_FETCH_ADD 127 }; 128 129 /* 130 * System image GUID. 131 */ 132 __be64 ib_qib_sys_image_guid; 133 134 /** 135 * qib_copy_sge - copy data to SGE memory 136 * @ss: the SGE state 137 * @data: the data to copy 138 * @length: the length of the data 139 */ 140 void qib_copy_sge(struct rvt_sge_state *ss, void *data, u32 length, int release) 141 { 142 struct rvt_sge *sge = &ss->sge; 143 144 while (length) { 145 u32 len = rvt_get_sge_length(sge, length); 146 147 WARN_ON_ONCE(len == 0); 148 memcpy(sge->vaddr, data, len); 149 rvt_update_sge(ss, len, release); 150 data += len; 151 length -= len; 152 } 153 } 154 155 /* 156 * Count the number of DMA descriptors needed to send length bytes of data. 157 * Don't modify the qib_sge_state to get the count. 158 * Return zero if any of the segments is not aligned. 159 */ 160 static u32 qib_count_sge(struct rvt_sge_state *ss, u32 length) 161 { 162 struct rvt_sge *sg_list = ss->sg_list; 163 struct rvt_sge sge = ss->sge; 164 u8 num_sge = ss->num_sge; 165 u32 ndesc = 1; /* count the header */ 166 167 while (length) { 168 u32 len = sge.length; 169 170 if (len > length) 171 len = length; 172 if (len > sge.sge_length) 173 len = sge.sge_length; 174 BUG_ON(len == 0); 175 if (((long) sge.vaddr & (sizeof(u32) - 1)) || 176 (len != length && (len & (sizeof(u32) - 1)))) { 177 ndesc = 0; 178 break; 179 } 180 ndesc++; 181 sge.vaddr += len; 182 sge.length -= len; 183 sge.sge_length -= len; 184 if (sge.sge_length == 0) { 185 if (--num_sge) 186 sge = *sg_list++; 187 } else if (sge.length == 0 && sge.mr->lkey) { 188 if (++sge.n >= RVT_SEGSZ) { 189 if (++sge.m >= sge.mr->mapsz) 190 break; 191 sge.n = 0; 192 } 193 sge.vaddr = 194 sge.mr->map[sge.m]->segs[sge.n].vaddr; 195 sge.length = 196 sge.mr->map[sge.m]->segs[sge.n].length; 197 } 198 length -= len; 199 } 200 return ndesc; 201 } 202 203 /* 204 * Copy from the SGEs to the data buffer. 205 */ 206 static void qib_copy_from_sge(void *data, struct rvt_sge_state *ss, u32 length) 207 { 208 struct rvt_sge *sge = &ss->sge; 209 210 while (length) { 211 u32 len = sge->length; 212 213 if (len > length) 214 len = length; 215 if (len > sge->sge_length) 216 len = sge->sge_length; 217 BUG_ON(len == 0); 218 memcpy(data, sge->vaddr, len); 219 sge->vaddr += len; 220 sge->length -= len; 221 sge->sge_length -= len; 222 if (sge->sge_length == 0) { 223 if (--ss->num_sge) 224 *sge = *ss->sg_list++; 225 } else if (sge->length == 0 && sge->mr->lkey) { 226 if (++sge->n >= RVT_SEGSZ) { 227 if (++sge->m >= sge->mr->mapsz) 228 break; 229 sge->n = 0; 230 } 231 sge->vaddr = 232 sge->mr->map[sge->m]->segs[sge->n].vaddr; 233 sge->length = 234 sge->mr->map[sge->m]->segs[sge->n].length; 235 } 236 data += len; 237 length -= len; 238 } 239 } 240 241 /** 242 * qib_qp_rcv - processing an incoming packet on a QP 243 * @rcd: the context pointer 244 * @hdr: the packet header 245 * @has_grh: true if the packet has a GRH 246 * @data: the packet data 247 * @tlen: the packet length 248 * @qp: the QP the packet came on 249 * 250 * This is called from qib_ib_rcv() to process an incoming packet 251 * for the given QP. 252 * Called at interrupt level. 253 */ 254 static void qib_qp_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr, 255 int has_grh, void *data, u32 tlen, struct rvt_qp *qp) 256 { 257 struct qib_ibport *ibp = &rcd->ppd->ibport_data; 258 259 spin_lock(&qp->r_lock); 260 261 /* Check for valid receive state. */ 262 if (!(ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK)) { 263 ibp->rvp.n_pkt_drops++; 264 goto unlock; 265 } 266 267 switch (qp->ibqp.qp_type) { 268 case IB_QPT_SMI: 269 case IB_QPT_GSI: 270 if (ib_qib_disable_sma) 271 break; 272 /* FALLTHROUGH */ 273 case IB_QPT_UD: 274 qib_ud_rcv(ibp, hdr, has_grh, data, tlen, qp); 275 break; 276 277 case IB_QPT_RC: 278 qib_rc_rcv(rcd, hdr, has_grh, data, tlen, qp); 279 break; 280 281 case IB_QPT_UC: 282 qib_uc_rcv(ibp, hdr, has_grh, data, tlen, qp); 283 break; 284 285 default: 286 break; 287 } 288 289 unlock: 290 spin_unlock(&qp->r_lock); 291 } 292 293 /** 294 * qib_ib_rcv - process an incoming packet 295 * @rcd: the context pointer 296 * @rhdr: the header of the packet 297 * @data: the packet payload 298 * @tlen: the packet length 299 * 300 * This is called from qib_kreceive() to process an incoming packet at 301 * interrupt level. Tlen is the length of the header + data + CRC in bytes. 302 */ 303 void qib_ib_rcv(struct qib_ctxtdata *rcd, void *rhdr, void *data, u32 tlen) 304 { 305 struct qib_pportdata *ppd = rcd->ppd; 306 struct qib_ibport *ibp = &ppd->ibport_data; 307 struct ib_header *hdr = rhdr; 308 struct qib_devdata *dd = ppd->dd; 309 struct rvt_dev_info *rdi = &dd->verbs_dev.rdi; 310 struct ib_other_headers *ohdr; 311 struct rvt_qp *qp; 312 u32 qp_num; 313 int lnh; 314 u8 opcode; 315 u16 lid; 316 317 /* 24 == LRH+BTH+CRC */ 318 if (unlikely(tlen < 24)) 319 goto drop; 320 321 /* Check for a valid destination LID (see ch. 7.11.1). */ 322 lid = be16_to_cpu(hdr->lrh[1]); 323 if (lid < be16_to_cpu(IB_MULTICAST_LID_BASE)) { 324 lid &= ~((1 << ppd->lmc) - 1); 325 if (unlikely(lid != ppd->lid)) 326 goto drop; 327 } 328 329 /* Check for GRH */ 330 lnh = be16_to_cpu(hdr->lrh[0]) & 3; 331 if (lnh == QIB_LRH_BTH) 332 ohdr = &hdr->u.oth; 333 else if (lnh == QIB_LRH_GRH) { 334 u32 vtf; 335 336 ohdr = &hdr->u.l.oth; 337 if (hdr->u.l.grh.next_hdr != IB_GRH_NEXT_HDR) 338 goto drop; 339 vtf = be32_to_cpu(hdr->u.l.grh.version_tclass_flow); 340 if ((vtf >> IB_GRH_VERSION_SHIFT) != IB_GRH_VERSION) 341 goto drop; 342 } else 343 goto drop; 344 345 opcode = (be32_to_cpu(ohdr->bth[0]) >> 24) & 0x7f; 346 #ifdef CONFIG_DEBUG_FS 347 rcd->opstats->stats[opcode].n_bytes += tlen; 348 rcd->opstats->stats[opcode].n_packets++; 349 #endif 350 351 /* Get the destination QP number. */ 352 qp_num = be32_to_cpu(ohdr->bth[1]) & RVT_QPN_MASK; 353 if (qp_num == QIB_MULTICAST_QPN) { 354 struct rvt_mcast *mcast; 355 struct rvt_mcast_qp *p; 356 357 if (lnh != QIB_LRH_GRH) 358 goto drop; 359 mcast = rvt_mcast_find(&ibp->rvp, &hdr->u.l.grh.dgid, lid); 360 if (mcast == NULL) 361 goto drop; 362 this_cpu_inc(ibp->pmastats->n_multicast_rcv); 363 list_for_each_entry_rcu(p, &mcast->qp_list, list) 364 qib_qp_rcv(rcd, hdr, 1, data, tlen, p->qp); 365 /* 366 * Notify rvt_multicast_detach() if it is waiting for us 367 * to finish. 368 */ 369 if (atomic_dec_return(&mcast->refcount) <= 1) 370 wake_up(&mcast->wait); 371 } else { 372 rcu_read_lock(); 373 qp = rvt_lookup_qpn(rdi, &ibp->rvp, qp_num); 374 if (!qp) { 375 rcu_read_unlock(); 376 goto drop; 377 } 378 this_cpu_inc(ibp->pmastats->n_unicast_rcv); 379 qib_qp_rcv(rcd, hdr, lnh == QIB_LRH_GRH, data, tlen, qp); 380 rcu_read_unlock(); 381 } 382 return; 383 384 drop: 385 ibp->rvp.n_pkt_drops++; 386 } 387 388 /* 389 * This is called from a timer to check for QPs 390 * which need kernel memory in order to send a packet. 391 */ 392 static void mem_timer(struct timer_list *t) 393 { 394 struct qib_ibdev *dev = from_timer(dev, t, mem_timer); 395 struct list_head *list = &dev->memwait; 396 struct rvt_qp *qp = NULL; 397 struct qib_qp_priv *priv = NULL; 398 unsigned long flags; 399 400 spin_lock_irqsave(&dev->rdi.pending_lock, flags); 401 if (!list_empty(list)) { 402 priv = list_entry(list->next, struct qib_qp_priv, iowait); 403 qp = priv->owner; 404 list_del_init(&priv->iowait); 405 rvt_get_qp(qp); 406 if (!list_empty(list)) 407 mod_timer(&dev->mem_timer, jiffies + 1); 408 } 409 spin_unlock_irqrestore(&dev->rdi.pending_lock, flags); 410 411 if (qp) { 412 spin_lock_irqsave(&qp->s_lock, flags); 413 if (qp->s_flags & RVT_S_WAIT_KMEM) { 414 qp->s_flags &= ~RVT_S_WAIT_KMEM; 415 qib_schedule_send(qp); 416 } 417 spin_unlock_irqrestore(&qp->s_lock, flags); 418 rvt_put_qp(qp); 419 } 420 } 421 422 #ifdef __LITTLE_ENDIAN 423 static inline u32 get_upper_bits(u32 data, u32 shift) 424 { 425 return data >> shift; 426 } 427 428 static inline u32 set_upper_bits(u32 data, u32 shift) 429 { 430 return data << shift; 431 } 432 433 static inline u32 clear_upper_bytes(u32 data, u32 n, u32 off) 434 { 435 data <<= ((sizeof(u32) - n) * BITS_PER_BYTE); 436 data >>= ((sizeof(u32) - n - off) * BITS_PER_BYTE); 437 return data; 438 } 439 #else 440 static inline u32 get_upper_bits(u32 data, u32 shift) 441 { 442 return data << shift; 443 } 444 445 static inline u32 set_upper_bits(u32 data, u32 shift) 446 { 447 return data >> shift; 448 } 449 450 static inline u32 clear_upper_bytes(u32 data, u32 n, u32 off) 451 { 452 data >>= ((sizeof(u32) - n) * BITS_PER_BYTE); 453 data <<= ((sizeof(u32) - n - off) * BITS_PER_BYTE); 454 return data; 455 } 456 #endif 457 458 static void copy_io(u32 __iomem *piobuf, struct rvt_sge_state *ss, 459 u32 length, unsigned flush_wc) 460 { 461 u32 extra = 0; 462 u32 data = 0; 463 u32 last; 464 465 while (1) { 466 u32 len = ss->sge.length; 467 u32 off; 468 469 if (len > length) 470 len = length; 471 if (len > ss->sge.sge_length) 472 len = ss->sge.sge_length; 473 BUG_ON(len == 0); 474 /* If the source address is not aligned, try to align it. */ 475 off = (unsigned long)ss->sge.vaddr & (sizeof(u32) - 1); 476 if (off) { 477 u32 *addr = (u32 *)((unsigned long)ss->sge.vaddr & 478 ~(sizeof(u32) - 1)); 479 u32 v = get_upper_bits(*addr, off * BITS_PER_BYTE); 480 u32 y; 481 482 y = sizeof(u32) - off; 483 if (len > y) 484 len = y; 485 if (len + extra >= sizeof(u32)) { 486 data |= set_upper_bits(v, extra * 487 BITS_PER_BYTE); 488 len = sizeof(u32) - extra; 489 if (len == length) { 490 last = data; 491 break; 492 } 493 __raw_writel(data, piobuf); 494 piobuf++; 495 extra = 0; 496 data = 0; 497 } else { 498 /* Clear unused upper bytes */ 499 data |= clear_upper_bytes(v, len, extra); 500 if (len == length) { 501 last = data; 502 break; 503 } 504 extra += len; 505 } 506 } else if (extra) { 507 /* Source address is aligned. */ 508 u32 *addr = (u32 *) ss->sge.vaddr; 509 int shift = extra * BITS_PER_BYTE; 510 int ushift = 32 - shift; 511 u32 l = len; 512 513 while (l >= sizeof(u32)) { 514 u32 v = *addr; 515 516 data |= set_upper_bits(v, shift); 517 __raw_writel(data, piobuf); 518 data = get_upper_bits(v, ushift); 519 piobuf++; 520 addr++; 521 l -= sizeof(u32); 522 } 523 /* 524 * We still have 'extra' number of bytes leftover. 525 */ 526 if (l) { 527 u32 v = *addr; 528 529 if (l + extra >= sizeof(u32)) { 530 data |= set_upper_bits(v, shift); 531 len -= l + extra - sizeof(u32); 532 if (len == length) { 533 last = data; 534 break; 535 } 536 __raw_writel(data, piobuf); 537 piobuf++; 538 extra = 0; 539 data = 0; 540 } else { 541 /* Clear unused upper bytes */ 542 data |= clear_upper_bytes(v, l, extra); 543 if (len == length) { 544 last = data; 545 break; 546 } 547 extra += l; 548 } 549 } else if (len == length) { 550 last = data; 551 break; 552 } 553 } else if (len == length) { 554 u32 w; 555 556 /* 557 * Need to round up for the last dword in the 558 * packet. 559 */ 560 w = (len + 3) >> 2; 561 qib_pio_copy(piobuf, ss->sge.vaddr, w - 1); 562 piobuf += w - 1; 563 last = ((u32 *) ss->sge.vaddr)[w - 1]; 564 break; 565 } else { 566 u32 w = len >> 2; 567 568 qib_pio_copy(piobuf, ss->sge.vaddr, w); 569 piobuf += w; 570 571 extra = len & (sizeof(u32) - 1); 572 if (extra) { 573 u32 v = ((u32 *) ss->sge.vaddr)[w]; 574 575 /* Clear unused upper bytes */ 576 data = clear_upper_bytes(v, extra, 0); 577 } 578 } 579 rvt_update_sge(ss, len, false); 580 length -= len; 581 } 582 /* Update address before sending packet. */ 583 rvt_update_sge(ss, length, false); 584 if (flush_wc) { 585 /* must flush early everything before trigger word */ 586 qib_flush_wc(); 587 __raw_writel(last, piobuf); 588 /* be sure trigger word is written */ 589 qib_flush_wc(); 590 } else 591 __raw_writel(last, piobuf); 592 } 593 594 static noinline struct qib_verbs_txreq *__get_txreq(struct qib_ibdev *dev, 595 struct rvt_qp *qp) 596 { 597 struct qib_qp_priv *priv = qp->priv; 598 struct qib_verbs_txreq *tx; 599 unsigned long flags; 600 601 spin_lock_irqsave(&qp->s_lock, flags); 602 spin_lock(&dev->rdi.pending_lock); 603 604 if (!list_empty(&dev->txreq_free)) { 605 struct list_head *l = dev->txreq_free.next; 606 607 list_del(l); 608 spin_unlock(&dev->rdi.pending_lock); 609 spin_unlock_irqrestore(&qp->s_lock, flags); 610 tx = list_entry(l, struct qib_verbs_txreq, txreq.list); 611 } else { 612 if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK && 613 list_empty(&priv->iowait)) { 614 dev->n_txwait++; 615 qp->s_flags |= RVT_S_WAIT_TX; 616 list_add_tail(&priv->iowait, &dev->txwait); 617 } 618 qp->s_flags &= ~RVT_S_BUSY; 619 spin_unlock(&dev->rdi.pending_lock); 620 spin_unlock_irqrestore(&qp->s_lock, flags); 621 tx = ERR_PTR(-EBUSY); 622 } 623 return tx; 624 } 625 626 static inline struct qib_verbs_txreq *get_txreq(struct qib_ibdev *dev, 627 struct rvt_qp *qp) 628 { 629 struct qib_verbs_txreq *tx; 630 unsigned long flags; 631 632 spin_lock_irqsave(&dev->rdi.pending_lock, flags); 633 /* assume the list non empty */ 634 if (likely(!list_empty(&dev->txreq_free))) { 635 struct list_head *l = dev->txreq_free.next; 636 637 list_del(l); 638 spin_unlock_irqrestore(&dev->rdi.pending_lock, flags); 639 tx = list_entry(l, struct qib_verbs_txreq, txreq.list); 640 } else { 641 /* call slow path to get the extra lock */ 642 spin_unlock_irqrestore(&dev->rdi.pending_lock, flags); 643 tx = __get_txreq(dev, qp); 644 } 645 return tx; 646 } 647 648 void qib_put_txreq(struct qib_verbs_txreq *tx) 649 { 650 struct qib_ibdev *dev; 651 struct rvt_qp *qp; 652 struct qib_qp_priv *priv; 653 unsigned long flags; 654 655 qp = tx->qp; 656 dev = to_idev(qp->ibqp.device); 657 658 if (tx->mr) { 659 rvt_put_mr(tx->mr); 660 tx->mr = NULL; 661 } 662 if (tx->txreq.flags & QIB_SDMA_TXREQ_F_FREEBUF) { 663 tx->txreq.flags &= ~QIB_SDMA_TXREQ_F_FREEBUF; 664 dma_unmap_single(&dd_from_dev(dev)->pcidev->dev, 665 tx->txreq.addr, tx->hdr_dwords << 2, 666 DMA_TO_DEVICE); 667 kfree(tx->align_buf); 668 } 669 670 spin_lock_irqsave(&dev->rdi.pending_lock, flags); 671 672 /* Put struct back on free list */ 673 list_add(&tx->txreq.list, &dev->txreq_free); 674 675 if (!list_empty(&dev->txwait)) { 676 /* Wake up first QP wanting a free struct */ 677 priv = list_entry(dev->txwait.next, struct qib_qp_priv, 678 iowait); 679 qp = priv->owner; 680 list_del_init(&priv->iowait); 681 rvt_get_qp(qp); 682 spin_unlock_irqrestore(&dev->rdi.pending_lock, flags); 683 684 spin_lock_irqsave(&qp->s_lock, flags); 685 if (qp->s_flags & RVT_S_WAIT_TX) { 686 qp->s_flags &= ~RVT_S_WAIT_TX; 687 qib_schedule_send(qp); 688 } 689 spin_unlock_irqrestore(&qp->s_lock, flags); 690 691 rvt_put_qp(qp); 692 } else 693 spin_unlock_irqrestore(&dev->rdi.pending_lock, flags); 694 } 695 696 /* 697 * This is called when there are send DMA descriptors that might be 698 * available. 699 * 700 * This is called with ppd->sdma_lock held. 701 */ 702 void qib_verbs_sdma_desc_avail(struct qib_pportdata *ppd, unsigned avail) 703 { 704 struct rvt_qp *qp; 705 struct qib_qp_priv *qpp, *nqpp; 706 struct rvt_qp *qps[20]; 707 struct qib_ibdev *dev; 708 unsigned i, n; 709 710 n = 0; 711 dev = &ppd->dd->verbs_dev; 712 spin_lock(&dev->rdi.pending_lock); 713 714 /* Search wait list for first QP wanting DMA descriptors. */ 715 list_for_each_entry_safe(qpp, nqpp, &dev->dmawait, iowait) { 716 qp = qpp->owner; 717 if (qp->port_num != ppd->port) 718 continue; 719 if (n == ARRAY_SIZE(qps)) 720 break; 721 if (qpp->s_tx->txreq.sg_count > avail) 722 break; 723 avail -= qpp->s_tx->txreq.sg_count; 724 list_del_init(&qpp->iowait); 725 rvt_get_qp(qp); 726 qps[n++] = qp; 727 } 728 729 spin_unlock(&dev->rdi.pending_lock); 730 731 for (i = 0; i < n; i++) { 732 qp = qps[i]; 733 spin_lock(&qp->s_lock); 734 if (qp->s_flags & RVT_S_WAIT_DMA_DESC) { 735 qp->s_flags &= ~RVT_S_WAIT_DMA_DESC; 736 qib_schedule_send(qp); 737 } 738 spin_unlock(&qp->s_lock); 739 rvt_put_qp(qp); 740 } 741 } 742 743 /* 744 * This is called with ppd->sdma_lock held. 745 */ 746 static void sdma_complete(struct qib_sdma_txreq *cookie, int status) 747 { 748 struct qib_verbs_txreq *tx = 749 container_of(cookie, struct qib_verbs_txreq, txreq); 750 struct rvt_qp *qp = tx->qp; 751 struct qib_qp_priv *priv = qp->priv; 752 753 spin_lock(&qp->s_lock); 754 if (tx->wqe) 755 qib_send_complete(qp, tx->wqe, IB_WC_SUCCESS); 756 else if (qp->ibqp.qp_type == IB_QPT_RC) { 757 struct ib_header *hdr; 758 759 if (tx->txreq.flags & QIB_SDMA_TXREQ_F_FREEBUF) 760 hdr = &tx->align_buf->hdr; 761 else { 762 struct qib_ibdev *dev = to_idev(qp->ibqp.device); 763 764 hdr = &dev->pio_hdrs[tx->hdr_inx].hdr; 765 } 766 qib_rc_send_complete(qp, hdr); 767 } 768 if (atomic_dec_and_test(&priv->s_dma_busy)) { 769 if (qp->state == IB_QPS_RESET) 770 wake_up(&priv->wait_dma); 771 else if (qp->s_flags & RVT_S_WAIT_DMA) { 772 qp->s_flags &= ~RVT_S_WAIT_DMA; 773 qib_schedule_send(qp); 774 } 775 } 776 spin_unlock(&qp->s_lock); 777 778 qib_put_txreq(tx); 779 } 780 781 static int wait_kmem(struct qib_ibdev *dev, struct rvt_qp *qp) 782 { 783 struct qib_qp_priv *priv = qp->priv; 784 unsigned long flags; 785 int ret = 0; 786 787 spin_lock_irqsave(&qp->s_lock, flags); 788 if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) { 789 spin_lock(&dev->rdi.pending_lock); 790 if (list_empty(&priv->iowait)) { 791 if (list_empty(&dev->memwait)) 792 mod_timer(&dev->mem_timer, jiffies + 1); 793 qp->s_flags |= RVT_S_WAIT_KMEM; 794 list_add_tail(&priv->iowait, &dev->memwait); 795 } 796 spin_unlock(&dev->rdi.pending_lock); 797 qp->s_flags &= ~RVT_S_BUSY; 798 ret = -EBUSY; 799 } 800 spin_unlock_irqrestore(&qp->s_lock, flags); 801 802 return ret; 803 } 804 805 static int qib_verbs_send_dma(struct rvt_qp *qp, struct ib_header *hdr, 806 u32 hdrwords, struct rvt_sge_state *ss, u32 len, 807 u32 plen, u32 dwords) 808 { 809 struct qib_qp_priv *priv = qp->priv; 810 struct qib_ibdev *dev = to_idev(qp->ibqp.device); 811 struct qib_devdata *dd = dd_from_dev(dev); 812 struct qib_ibport *ibp = to_iport(qp->ibqp.device, qp->port_num); 813 struct qib_pportdata *ppd = ppd_from_ibp(ibp); 814 struct qib_verbs_txreq *tx; 815 struct qib_pio_header *phdr; 816 u32 control; 817 u32 ndesc; 818 int ret; 819 820 tx = priv->s_tx; 821 if (tx) { 822 priv->s_tx = NULL; 823 /* resend previously constructed packet */ 824 ret = qib_sdma_verbs_send(ppd, tx->ss, tx->dwords, tx); 825 goto bail; 826 } 827 828 tx = get_txreq(dev, qp); 829 if (IS_ERR(tx)) 830 goto bail_tx; 831 832 control = dd->f_setpbc_control(ppd, plen, qp->s_srate, 833 be16_to_cpu(hdr->lrh[0]) >> 12); 834 tx->qp = qp; 835 tx->wqe = qp->s_wqe; 836 tx->mr = qp->s_rdma_mr; 837 if (qp->s_rdma_mr) 838 qp->s_rdma_mr = NULL; 839 tx->txreq.callback = sdma_complete; 840 if (dd->flags & QIB_HAS_SDMA_TIMEOUT) 841 tx->txreq.flags = QIB_SDMA_TXREQ_F_HEADTOHOST; 842 else 843 tx->txreq.flags = QIB_SDMA_TXREQ_F_INTREQ; 844 if (plen + 1 > dd->piosize2kmax_dwords) 845 tx->txreq.flags |= QIB_SDMA_TXREQ_F_USELARGEBUF; 846 847 if (len) { 848 /* 849 * Don't try to DMA if it takes more descriptors than 850 * the queue holds. 851 */ 852 ndesc = qib_count_sge(ss, len); 853 if (ndesc >= ppd->sdma_descq_cnt) 854 ndesc = 0; 855 } else 856 ndesc = 1; 857 if (ndesc) { 858 phdr = &dev->pio_hdrs[tx->hdr_inx]; 859 phdr->pbc[0] = cpu_to_le32(plen); 860 phdr->pbc[1] = cpu_to_le32(control); 861 memcpy(&phdr->hdr, hdr, hdrwords << 2); 862 tx->txreq.flags |= QIB_SDMA_TXREQ_F_FREEDESC; 863 tx->txreq.sg_count = ndesc; 864 tx->txreq.addr = dev->pio_hdrs_phys + 865 tx->hdr_inx * sizeof(struct qib_pio_header); 866 tx->hdr_dwords = hdrwords + 2; /* add PBC length */ 867 ret = qib_sdma_verbs_send(ppd, ss, dwords, tx); 868 goto bail; 869 } 870 871 /* Allocate a buffer and copy the header and payload to it. */ 872 tx->hdr_dwords = plen + 1; 873 phdr = kmalloc(tx->hdr_dwords << 2, GFP_ATOMIC); 874 if (!phdr) 875 goto err_tx; 876 phdr->pbc[0] = cpu_to_le32(plen); 877 phdr->pbc[1] = cpu_to_le32(control); 878 memcpy(&phdr->hdr, hdr, hdrwords << 2); 879 qib_copy_from_sge((u32 *) &phdr->hdr + hdrwords, ss, len); 880 881 tx->txreq.addr = dma_map_single(&dd->pcidev->dev, phdr, 882 tx->hdr_dwords << 2, DMA_TO_DEVICE); 883 if (dma_mapping_error(&dd->pcidev->dev, tx->txreq.addr)) 884 goto map_err; 885 tx->align_buf = phdr; 886 tx->txreq.flags |= QIB_SDMA_TXREQ_F_FREEBUF; 887 tx->txreq.sg_count = 1; 888 ret = qib_sdma_verbs_send(ppd, NULL, 0, tx); 889 goto unaligned; 890 891 map_err: 892 kfree(phdr); 893 err_tx: 894 qib_put_txreq(tx); 895 ret = wait_kmem(dev, qp); 896 unaligned: 897 ibp->rvp.n_unaligned++; 898 bail: 899 return ret; 900 bail_tx: 901 ret = PTR_ERR(tx); 902 goto bail; 903 } 904 905 /* 906 * If we are now in the error state, return zero to flush the 907 * send work request. 908 */ 909 static int no_bufs_available(struct rvt_qp *qp) 910 { 911 struct qib_qp_priv *priv = qp->priv; 912 struct qib_ibdev *dev = to_idev(qp->ibqp.device); 913 struct qib_devdata *dd; 914 unsigned long flags; 915 int ret = 0; 916 917 /* 918 * Note that as soon as want_buffer() is called and 919 * possibly before it returns, qib_ib_piobufavail() 920 * could be called. Therefore, put QP on the I/O wait list before 921 * enabling the PIO avail interrupt. 922 */ 923 spin_lock_irqsave(&qp->s_lock, flags); 924 if (ib_rvt_state_ops[qp->state] & RVT_PROCESS_RECV_OK) { 925 spin_lock(&dev->rdi.pending_lock); 926 if (list_empty(&priv->iowait)) { 927 dev->n_piowait++; 928 qp->s_flags |= RVT_S_WAIT_PIO; 929 list_add_tail(&priv->iowait, &dev->piowait); 930 dd = dd_from_dev(dev); 931 dd->f_wantpiobuf_intr(dd, 1); 932 } 933 spin_unlock(&dev->rdi.pending_lock); 934 qp->s_flags &= ~RVT_S_BUSY; 935 ret = -EBUSY; 936 } 937 spin_unlock_irqrestore(&qp->s_lock, flags); 938 return ret; 939 } 940 941 static int qib_verbs_send_pio(struct rvt_qp *qp, struct ib_header *ibhdr, 942 u32 hdrwords, struct rvt_sge_state *ss, u32 len, 943 u32 plen, u32 dwords) 944 { 945 struct qib_devdata *dd = dd_from_ibdev(qp->ibqp.device); 946 struct qib_pportdata *ppd = dd->pport + qp->port_num - 1; 947 u32 *hdr = (u32 *) ibhdr; 948 u32 __iomem *piobuf_orig; 949 u32 __iomem *piobuf; 950 u64 pbc; 951 unsigned long flags; 952 unsigned flush_wc; 953 u32 control; 954 u32 pbufn; 955 956 control = dd->f_setpbc_control(ppd, plen, qp->s_srate, 957 be16_to_cpu(ibhdr->lrh[0]) >> 12); 958 pbc = ((u64) control << 32) | plen; 959 piobuf = dd->f_getsendbuf(ppd, pbc, &pbufn); 960 if (unlikely(piobuf == NULL)) 961 return no_bufs_available(qp); 962 963 /* 964 * Write the pbc. 965 * We have to flush after the PBC for correctness on some cpus 966 * or WC buffer can be written out of order. 967 */ 968 writeq(pbc, piobuf); 969 piobuf_orig = piobuf; 970 piobuf += 2; 971 972 flush_wc = dd->flags & QIB_PIO_FLUSH_WC; 973 if (len == 0) { 974 /* 975 * If there is just the header portion, must flush before 976 * writing last word of header for correctness, and after 977 * the last header word (trigger word). 978 */ 979 if (flush_wc) { 980 qib_flush_wc(); 981 qib_pio_copy(piobuf, hdr, hdrwords - 1); 982 qib_flush_wc(); 983 __raw_writel(hdr[hdrwords - 1], piobuf + hdrwords - 1); 984 qib_flush_wc(); 985 } else 986 qib_pio_copy(piobuf, hdr, hdrwords); 987 goto done; 988 } 989 990 if (flush_wc) 991 qib_flush_wc(); 992 qib_pio_copy(piobuf, hdr, hdrwords); 993 piobuf += hdrwords; 994 995 /* The common case is aligned and contained in one segment. */ 996 if (likely(ss->num_sge == 1 && len <= ss->sge.length && 997 !((unsigned long)ss->sge.vaddr & (sizeof(u32) - 1)))) { 998 u32 *addr = (u32 *) ss->sge.vaddr; 999 1000 /* Update address before sending packet. */ 1001 rvt_update_sge(ss, len, false); 1002 if (flush_wc) { 1003 qib_pio_copy(piobuf, addr, dwords - 1); 1004 /* must flush early everything before trigger word */ 1005 qib_flush_wc(); 1006 __raw_writel(addr[dwords - 1], piobuf + dwords - 1); 1007 /* be sure trigger word is written */ 1008 qib_flush_wc(); 1009 } else 1010 qib_pio_copy(piobuf, addr, dwords); 1011 goto done; 1012 } 1013 copy_io(piobuf, ss, len, flush_wc); 1014 done: 1015 if (dd->flags & QIB_USE_SPCL_TRIG) { 1016 u32 spcl_off = (pbufn >= dd->piobcnt2k) ? 2047 : 1023; 1017 1018 qib_flush_wc(); 1019 __raw_writel(0xaebecede, piobuf_orig + spcl_off); 1020 } 1021 qib_sendbuf_done(dd, pbufn); 1022 if (qp->s_rdma_mr) { 1023 rvt_put_mr(qp->s_rdma_mr); 1024 qp->s_rdma_mr = NULL; 1025 } 1026 if (qp->s_wqe) { 1027 spin_lock_irqsave(&qp->s_lock, flags); 1028 qib_send_complete(qp, qp->s_wqe, IB_WC_SUCCESS); 1029 spin_unlock_irqrestore(&qp->s_lock, flags); 1030 } else if (qp->ibqp.qp_type == IB_QPT_RC) { 1031 spin_lock_irqsave(&qp->s_lock, flags); 1032 qib_rc_send_complete(qp, ibhdr); 1033 spin_unlock_irqrestore(&qp->s_lock, flags); 1034 } 1035 return 0; 1036 } 1037 1038 /** 1039 * qib_verbs_send - send a packet 1040 * @qp: the QP to send on 1041 * @hdr: the packet header 1042 * @hdrwords: the number of 32-bit words in the header 1043 * @ss: the SGE to send 1044 * @len: the length of the packet in bytes 1045 * 1046 * Return zero if packet is sent or queued OK. 1047 * Return non-zero and clear qp->s_flags RVT_S_BUSY otherwise. 1048 */ 1049 int qib_verbs_send(struct rvt_qp *qp, struct ib_header *hdr, 1050 u32 hdrwords, struct rvt_sge_state *ss, u32 len) 1051 { 1052 struct qib_devdata *dd = dd_from_ibdev(qp->ibqp.device); 1053 u32 plen; 1054 int ret; 1055 u32 dwords = (len + 3) >> 2; 1056 1057 /* 1058 * Calculate the send buffer trigger address. 1059 * The +1 counts for the pbc control dword following the pbc length. 1060 */ 1061 plen = hdrwords + dwords + 1; 1062 1063 /* 1064 * VL15 packets (IB_QPT_SMI) will always use PIO, so we 1065 * can defer SDMA restart until link goes ACTIVE without 1066 * worrying about just how we got there. 1067 */ 1068 if (qp->ibqp.qp_type == IB_QPT_SMI || 1069 !(dd->flags & QIB_HAS_SEND_DMA)) 1070 ret = qib_verbs_send_pio(qp, hdr, hdrwords, ss, len, 1071 plen, dwords); 1072 else 1073 ret = qib_verbs_send_dma(qp, hdr, hdrwords, ss, len, 1074 plen, dwords); 1075 1076 return ret; 1077 } 1078 1079 int qib_snapshot_counters(struct qib_pportdata *ppd, u64 *swords, 1080 u64 *rwords, u64 *spkts, u64 *rpkts, 1081 u64 *xmit_wait) 1082 { 1083 int ret; 1084 struct qib_devdata *dd = ppd->dd; 1085 1086 if (!(dd->flags & QIB_PRESENT)) { 1087 /* no hardware, freeze, etc. */ 1088 ret = -EINVAL; 1089 goto bail; 1090 } 1091 *swords = dd->f_portcntr(ppd, QIBPORTCNTR_WORDSEND); 1092 *rwords = dd->f_portcntr(ppd, QIBPORTCNTR_WORDRCV); 1093 *spkts = dd->f_portcntr(ppd, QIBPORTCNTR_PKTSEND); 1094 *rpkts = dd->f_portcntr(ppd, QIBPORTCNTR_PKTRCV); 1095 *xmit_wait = dd->f_portcntr(ppd, QIBPORTCNTR_SENDSTALL); 1096 1097 ret = 0; 1098 1099 bail: 1100 return ret; 1101 } 1102 1103 /** 1104 * qib_get_counters - get various chip counters 1105 * @dd: the qlogic_ib device 1106 * @cntrs: counters are placed here 1107 * 1108 * Return the counters needed by recv_pma_get_portcounters(). 1109 */ 1110 int qib_get_counters(struct qib_pportdata *ppd, 1111 struct qib_verbs_counters *cntrs) 1112 { 1113 int ret; 1114 1115 if (!(ppd->dd->flags & QIB_PRESENT)) { 1116 /* no hardware, freeze, etc. */ 1117 ret = -EINVAL; 1118 goto bail; 1119 } 1120 cntrs->symbol_error_counter = 1121 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_IBSYMBOLERR); 1122 cntrs->link_error_recovery_counter = 1123 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_IBLINKERRRECOV); 1124 /* 1125 * The link downed counter counts when the other side downs the 1126 * connection. We add in the number of times we downed the link 1127 * due to local link integrity errors to compensate. 1128 */ 1129 cntrs->link_downed_counter = 1130 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_IBLINKDOWN); 1131 cntrs->port_rcv_errors = 1132 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RXDROPPKT) + 1133 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RCVOVFL) + 1134 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERR_RLEN) + 1135 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_INVALIDRLEN) + 1136 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRLINK) + 1137 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRICRC) + 1138 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRVCRC) + 1139 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_ERRLPCRC) + 1140 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_BADFORMAT); 1141 cntrs->port_rcv_errors += 1142 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RXLOCALPHYERR); 1143 cntrs->port_rcv_errors += 1144 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RXVLERR); 1145 cntrs->port_rcv_remphys_errors = 1146 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_RCVEBP); 1147 cntrs->port_xmit_discards = 1148 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_UNSUPVL); 1149 cntrs->port_xmit_data = ppd->dd->f_portcntr(ppd, 1150 QIBPORTCNTR_WORDSEND); 1151 cntrs->port_rcv_data = ppd->dd->f_portcntr(ppd, 1152 QIBPORTCNTR_WORDRCV); 1153 cntrs->port_xmit_packets = ppd->dd->f_portcntr(ppd, 1154 QIBPORTCNTR_PKTSEND); 1155 cntrs->port_rcv_packets = ppd->dd->f_portcntr(ppd, 1156 QIBPORTCNTR_PKTRCV); 1157 cntrs->local_link_integrity_errors = 1158 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_LLI); 1159 cntrs->excessive_buffer_overrun_errors = 1160 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_EXCESSBUFOVFL); 1161 cntrs->vl15_dropped = 1162 ppd->dd->f_portcntr(ppd, QIBPORTCNTR_VL15PKTDROP); 1163 1164 ret = 0; 1165 1166 bail: 1167 return ret; 1168 } 1169 1170 /** 1171 * qib_ib_piobufavail - callback when a PIO buffer is available 1172 * @dd: the device pointer 1173 * 1174 * This is called from qib_intr() at interrupt level when a PIO buffer is 1175 * available after qib_verbs_send() returned an error that no buffers were 1176 * available. Disable the interrupt if there are no more QPs waiting. 1177 */ 1178 void qib_ib_piobufavail(struct qib_devdata *dd) 1179 { 1180 struct qib_ibdev *dev = &dd->verbs_dev; 1181 struct list_head *list; 1182 struct rvt_qp *qps[5]; 1183 struct rvt_qp *qp; 1184 unsigned long flags; 1185 unsigned i, n; 1186 struct qib_qp_priv *priv; 1187 1188 list = &dev->piowait; 1189 n = 0; 1190 1191 /* 1192 * Note: checking that the piowait list is empty and clearing 1193 * the buffer available interrupt needs to be atomic or we 1194 * could end up with QPs on the wait list with the interrupt 1195 * disabled. 1196 */ 1197 spin_lock_irqsave(&dev->rdi.pending_lock, flags); 1198 while (!list_empty(list)) { 1199 if (n == ARRAY_SIZE(qps)) 1200 goto full; 1201 priv = list_entry(list->next, struct qib_qp_priv, iowait); 1202 qp = priv->owner; 1203 list_del_init(&priv->iowait); 1204 rvt_get_qp(qp); 1205 qps[n++] = qp; 1206 } 1207 dd->f_wantpiobuf_intr(dd, 0); 1208 full: 1209 spin_unlock_irqrestore(&dev->rdi.pending_lock, flags); 1210 1211 for (i = 0; i < n; i++) { 1212 qp = qps[i]; 1213 1214 spin_lock_irqsave(&qp->s_lock, flags); 1215 if (qp->s_flags & RVT_S_WAIT_PIO) { 1216 qp->s_flags &= ~RVT_S_WAIT_PIO; 1217 qib_schedule_send(qp); 1218 } 1219 spin_unlock_irqrestore(&qp->s_lock, flags); 1220 1221 /* Notify qib_destroy_qp() if it is waiting. */ 1222 rvt_put_qp(qp); 1223 } 1224 } 1225 1226 static int qib_query_port(struct rvt_dev_info *rdi, u8 port_num, 1227 struct ib_port_attr *props) 1228 { 1229 struct qib_ibdev *ibdev = container_of(rdi, struct qib_ibdev, rdi); 1230 struct qib_devdata *dd = dd_from_dev(ibdev); 1231 struct qib_pportdata *ppd = &dd->pport[port_num - 1]; 1232 enum ib_mtu mtu; 1233 u16 lid = ppd->lid; 1234 1235 /* props being zeroed by the caller, avoid zeroing it here */ 1236 props->lid = lid ? lid : be16_to_cpu(IB_LID_PERMISSIVE); 1237 props->lmc = ppd->lmc; 1238 props->state = dd->f_iblink_state(ppd->lastibcstat); 1239 props->phys_state = dd->f_ibphys_portstate(ppd->lastibcstat); 1240 props->gid_tbl_len = QIB_GUIDS_PER_PORT; 1241 props->active_width = ppd->link_width_active; 1242 /* See rate_show() */ 1243 props->active_speed = ppd->link_speed_active; 1244 props->max_vl_num = qib_num_vls(ppd->vls_supported); 1245 1246 props->max_mtu = qib_ibmtu ? qib_ibmtu : IB_MTU_4096; 1247 switch (ppd->ibmtu) { 1248 case 4096: 1249 mtu = IB_MTU_4096; 1250 break; 1251 case 2048: 1252 mtu = IB_MTU_2048; 1253 break; 1254 case 1024: 1255 mtu = IB_MTU_1024; 1256 break; 1257 case 512: 1258 mtu = IB_MTU_512; 1259 break; 1260 case 256: 1261 mtu = IB_MTU_256; 1262 break; 1263 default: 1264 mtu = IB_MTU_2048; 1265 } 1266 props->active_mtu = mtu; 1267 1268 return 0; 1269 } 1270 1271 static int qib_modify_device(struct ib_device *device, 1272 int device_modify_mask, 1273 struct ib_device_modify *device_modify) 1274 { 1275 struct qib_devdata *dd = dd_from_ibdev(device); 1276 unsigned i; 1277 int ret; 1278 1279 if (device_modify_mask & ~(IB_DEVICE_MODIFY_SYS_IMAGE_GUID | 1280 IB_DEVICE_MODIFY_NODE_DESC)) { 1281 ret = -EOPNOTSUPP; 1282 goto bail; 1283 } 1284 1285 if (device_modify_mask & IB_DEVICE_MODIFY_NODE_DESC) { 1286 memcpy(device->node_desc, device_modify->node_desc, 1287 IB_DEVICE_NODE_DESC_MAX); 1288 for (i = 0; i < dd->num_pports; i++) { 1289 struct qib_ibport *ibp = &dd->pport[i].ibport_data; 1290 1291 qib_node_desc_chg(ibp); 1292 } 1293 } 1294 1295 if (device_modify_mask & IB_DEVICE_MODIFY_SYS_IMAGE_GUID) { 1296 ib_qib_sys_image_guid = 1297 cpu_to_be64(device_modify->sys_image_guid); 1298 for (i = 0; i < dd->num_pports; i++) { 1299 struct qib_ibport *ibp = &dd->pport[i].ibport_data; 1300 1301 qib_sys_guid_chg(ibp); 1302 } 1303 } 1304 1305 ret = 0; 1306 1307 bail: 1308 return ret; 1309 } 1310 1311 static int qib_shut_down_port(struct rvt_dev_info *rdi, u8 port_num) 1312 { 1313 struct qib_ibdev *ibdev = container_of(rdi, struct qib_ibdev, rdi); 1314 struct qib_devdata *dd = dd_from_dev(ibdev); 1315 struct qib_pportdata *ppd = &dd->pport[port_num - 1]; 1316 1317 qib_set_linkstate(ppd, QIB_IB_LINKDOWN); 1318 1319 return 0; 1320 } 1321 1322 static int qib_get_guid_be(struct rvt_dev_info *rdi, struct rvt_ibport *rvp, 1323 int guid_index, __be64 *guid) 1324 { 1325 struct qib_ibport *ibp = container_of(rvp, struct qib_ibport, rvp); 1326 struct qib_pportdata *ppd = ppd_from_ibp(ibp); 1327 1328 if (guid_index == 0) 1329 *guid = ppd->guid; 1330 else if (guid_index < QIB_GUIDS_PER_PORT) 1331 *guid = ibp->guids[guid_index - 1]; 1332 else 1333 return -EINVAL; 1334 1335 return 0; 1336 } 1337 1338 int qib_check_ah(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr) 1339 { 1340 if (rdma_ah_get_sl(ah_attr) > 15) 1341 return -EINVAL; 1342 1343 if (rdma_ah_get_dlid(ah_attr) == 0) 1344 return -EINVAL; 1345 if (rdma_ah_get_dlid(ah_attr) >= 1346 be16_to_cpu(IB_MULTICAST_LID_BASE) && 1347 rdma_ah_get_dlid(ah_attr) != 1348 be16_to_cpu(IB_LID_PERMISSIVE) && 1349 !(rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH)) 1350 return -EINVAL; 1351 1352 return 0; 1353 } 1354 1355 static void qib_notify_new_ah(struct ib_device *ibdev, 1356 struct rdma_ah_attr *ah_attr, 1357 struct rvt_ah *ah) 1358 { 1359 struct qib_ibport *ibp; 1360 struct qib_pportdata *ppd; 1361 1362 /* 1363 * Do not trust reading anything from rvt_ah at this point as it is not 1364 * done being setup. We can however modify things which we need to set. 1365 */ 1366 1367 ibp = to_iport(ibdev, rdma_ah_get_port_num(ah_attr)); 1368 ppd = ppd_from_ibp(ibp); 1369 ah->vl = ibp->sl_to_vl[rdma_ah_get_sl(&ah->attr)]; 1370 ah->log_pmtu = ilog2(ppd->ibmtu); 1371 } 1372 1373 struct ib_ah *qib_create_qp0_ah(struct qib_ibport *ibp, u16 dlid) 1374 { 1375 struct rdma_ah_attr attr; 1376 struct ib_ah *ah = ERR_PTR(-EINVAL); 1377 struct rvt_qp *qp0; 1378 struct qib_pportdata *ppd = ppd_from_ibp(ibp); 1379 struct qib_devdata *dd = dd_from_ppd(ppd); 1380 u8 port_num = ppd->port; 1381 1382 memset(&attr, 0, sizeof(attr)); 1383 attr.type = rdma_ah_find_type(&dd->verbs_dev.rdi.ibdev, port_num); 1384 rdma_ah_set_dlid(&attr, dlid); 1385 rdma_ah_set_port_num(&attr, port_num); 1386 rcu_read_lock(); 1387 qp0 = rcu_dereference(ibp->rvp.qp[0]); 1388 if (qp0) 1389 ah = rdma_create_ah(qp0->ibqp.pd, &attr); 1390 rcu_read_unlock(); 1391 return ah; 1392 } 1393 1394 /** 1395 * qib_get_npkeys - return the size of the PKEY table for context 0 1396 * @dd: the qlogic_ib device 1397 */ 1398 unsigned qib_get_npkeys(struct qib_devdata *dd) 1399 { 1400 return ARRAY_SIZE(dd->rcd[0]->pkeys); 1401 } 1402 1403 /* 1404 * Return the indexed PKEY from the port PKEY table. 1405 * No need to validate rcd[ctxt]; the port is setup if we are here. 1406 */ 1407 unsigned qib_get_pkey(struct qib_ibport *ibp, unsigned index) 1408 { 1409 struct qib_pportdata *ppd = ppd_from_ibp(ibp); 1410 struct qib_devdata *dd = ppd->dd; 1411 unsigned ctxt = ppd->hw_pidx; 1412 unsigned ret; 1413 1414 /* dd->rcd null if mini_init or some init failures */ 1415 if (!dd->rcd || index >= ARRAY_SIZE(dd->rcd[ctxt]->pkeys)) 1416 ret = 0; 1417 else 1418 ret = dd->rcd[ctxt]->pkeys[index]; 1419 1420 return ret; 1421 } 1422 1423 static void init_ibport(struct qib_pportdata *ppd) 1424 { 1425 struct qib_verbs_counters cntrs; 1426 struct qib_ibport *ibp = &ppd->ibport_data; 1427 1428 spin_lock_init(&ibp->rvp.lock); 1429 /* Set the prefix to the default value (see ch. 4.1.1) */ 1430 ibp->rvp.gid_prefix = IB_DEFAULT_GID_PREFIX; 1431 ibp->rvp.sm_lid = be16_to_cpu(IB_LID_PERMISSIVE); 1432 ibp->rvp.port_cap_flags = IB_PORT_SYS_IMAGE_GUID_SUP | 1433 IB_PORT_CLIENT_REG_SUP | IB_PORT_SL_MAP_SUP | 1434 IB_PORT_TRAP_SUP | IB_PORT_AUTO_MIGR_SUP | 1435 IB_PORT_DR_NOTICE_SUP | IB_PORT_CAP_MASK_NOTICE_SUP | 1436 IB_PORT_OTHER_LOCAL_CHANGES_SUP; 1437 if (ppd->dd->flags & QIB_HAS_LINK_LATENCY) 1438 ibp->rvp.port_cap_flags |= IB_PORT_LINK_LATENCY_SUP; 1439 ibp->rvp.pma_counter_select[0] = IB_PMA_PORT_XMIT_DATA; 1440 ibp->rvp.pma_counter_select[1] = IB_PMA_PORT_RCV_DATA; 1441 ibp->rvp.pma_counter_select[2] = IB_PMA_PORT_XMIT_PKTS; 1442 ibp->rvp.pma_counter_select[3] = IB_PMA_PORT_RCV_PKTS; 1443 ibp->rvp.pma_counter_select[4] = IB_PMA_PORT_XMIT_WAIT; 1444 1445 /* Snapshot current HW counters to "clear" them. */ 1446 qib_get_counters(ppd, &cntrs); 1447 ibp->z_symbol_error_counter = cntrs.symbol_error_counter; 1448 ibp->z_link_error_recovery_counter = 1449 cntrs.link_error_recovery_counter; 1450 ibp->z_link_downed_counter = cntrs.link_downed_counter; 1451 ibp->z_port_rcv_errors = cntrs.port_rcv_errors; 1452 ibp->z_port_rcv_remphys_errors = cntrs.port_rcv_remphys_errors; 1453 ibp->z_port_xmit_discards = cntrs.port_xmit_discards; 1454 ibp->z_port_xmit_data = cntrs.port_xmit_data; 1455 ibp->z_port_rcv_data = cntrs.port_rcv_data; 1456 ibp->z_port_xmit_packets = cntrs.port_xmit_packets; 1457 ibp->z_port_rcv_packets = cntrs.port_rcv_packets; 1458 ibp->z_local_link_integrity_errors = 1459 cntrs.local_link_integrity_errors; 1460 ibp->z_excessive_buffer_overrun_errors = 1461 cntrs.excessive_buffer_overrun_errors; 1462 ibp->z_vl15_dropped = cntrs.vl15_dropped; 1463 RCU_INIT_POINTER(ibp->rvp.qp[0], NULL); 1464 RCU_INIT_POINTER(ibp->rvp.qp[1], NULL); 1465 } 1466 1467 /** 1468 * qib_fill_device_attr - Fill in rvt dev info device attributes. 1469 * @dd: the device data structure 1470 */ 1471 static void qib_fill_device_attr(struct qib_devdata *dd) 1472 { 1473 struct rvt_dev_info *rdi = &dd->verbs_dev.rdi; 1474 1475 memset(&rdi->dparms.props, 0, sizeof(rdi->dparms.props)); 1476 1477 rdi->dparms.props.max_pd = ib_qib_max_pds; 1478 rdi->dparms.props.max_ah = ib_qib_max_ahs; 1479 rdi->dparms.props.device_cap_flags = IB_DEVICE_BAD_PKEY_CNTR | 1480 IB_DEVICE_BAD_QKEY_CNTR | IB_DEVICE_SHUTDOWN_PORT | 1481 IB_DEVICE_SYS_IMAGE_GUID | IB_DEVICE_RC_RNR_NAK_GEN | 1482 IB_DEVICE_PORT_ACTIVE_EVENT | IB_DEVICE_SRQ_RESIZE; 1483 rdi->dparms.props.page_size_cap = PAGE_SIZE; 1484 rdi->dparms.props.vendor_id = 1485 QIB_SRC_OUI_1 << 16 | QIB_SRC_OUI_2 << 8 | QIB_SRC_OUI_3; 1486 rdi->dparms.props.vendor_part_id = dd->deviceid; 1487 rdi->dparms.props.hw_ver = dd->minrev; 1488 rdi->dparms.props.sys_image_guid = ib_qib_sys_image_guid; 1489 rdi->dparms.props.max_mr_size = ~0ULL; 1490 rdi->dparms.props.max_qp = ib_qib_max_qps; 1491 rdi->dparms.props.max_qp_wr = ib_qib_max_qp_wrs; 1492 rdi->dparms.props.max_sge = ib_qib_max_sges; 1493 rdi->dparms.props.max_sge_rd = ib_qib_max_sges; 1494 rdi->dparms.props.max_cq = ib_qib_max_cqs; 1495 rdi->dparms.props.max_cqe = ib_qib_max_cqes; 1496 rdi->dparms.props.max_ah = ib_qib_max_ahs; 1497 rdi->dparms.props.max_mr = rdi->lkey_table.max; 1498 rdi->dparms.props.max_fmr = rdi->lkey_table.max; 1499 rdi->dparms.props.max_map_per_fmr = 32767; 1500 rdi->dparms.props.max_qp_rd_atom = QIB_MAX_RDMA_ATOMIC; 1501 rdi->dparms.props.max_qp_init_rd_atom = 255; 1502 rdi->dparms.props.max_srq = ib_qib_max_srqs; 1503 rdi->dparms.props.max_srq_wr = ib_qib_max_srq_wrs; 1504 rdi->dparms.props.max_srq_sge = ib_qib_max_srq_sges; 1505 rdi->dparms.props.atomic_cap = IB_ATOMIC_GLOB; 1506 rdi->dparms.props.max_pkeys = qib_get_npkeys(dd); 1507 rdi->dparms.props.max_mcast_grp = ib_qib_max_mcast_grps; 1508 rdi->dparms.props.max_mcast_qp_attach = ib_qib_max_mcast_qp_attached; 1509 rdi->dparms.props.max_total_mcast_qp_attach = 1510 rdi->dparms.props.max_mcast_qp_attach * 1511 rdi->dparms.props.max_mcast_grp; 1512 /* post send table */ 1513 dd->verbs_dev.rdi.post_parms = qib_post_parms; 1514 } 1515 1516 /** 1517 * qib_register_ib_device - register our device with the infiniband core 1518 * @dd: the device data structure 1519 * Return the allocated qib_ibdev pointer or NULL on error. 1520 */ 1521 int qib_register_ib_device(struct qib_devdata *dd) 1522 { 1523 struct qib_ibdev *dev = &dd->verbs_dev; 1524 struct ib_device *ibdev = &dev->rdi.ibdev; 1525 struct qib_pportdata *ppd = dd->pport; 1526 unsigned i, ctxt; 1527 int ret; 1528 1529 get_random_bytes(&dev->qp_rnd, sizeof(dev->qp_rnd)); 1530 for (i = 0; i < dd->num_pports; i++) 1531 init_ibport(ppd + i); 1532 1533 /* Only need to initialize non-zero fields. */ 1534 timer_setup(&dev->mem_timer, mem_timer, 0); 1535 1536 INIT_LIST_HEAD(&dev->piowait); 1537 INIT_LIST_HEAD(&dev->dmawait); 1538 INIT_LIST_HEAD(&dev->txwait); 1539 INIT_LIST_HEAD(&dev->memwait); 1540 INIT_LIST_HEAD(&dev->txreq_free); 1541 1542 if (ppd->sdma_descq_cnt) { 1543 dev->pio_hdrs = dma_alloc_coherent(&dd->pcidev->dev, 1544 ppd->sdma_descq_cnt * 1545 sizeof(struct qib_pio_header), 1546 &dev->pio_hdrs_phys, 1547 GFP_KERNEL); 1548 if (!dev->pio_hdrs) { 1549 ret = -ENOMEM; 1550 goto err_hdrs; 1551 } 1552 } 1553 1554 for (i = 0; i < ppd->sdma_descq_cnt; i++) { 1555 struct qib_verbs_txreq *tx; 1556 1557 tx = kzalloc(sizeof(*tx), GFP_KERNEL); 1558 if (!tx) { 1559 ret = -ENOMEM; 1560 goto err_tx; 1561 } 1562 tx->hdr_inx = i; 1563 list_add(&tx->txreq.list, &dev->txreq_free); 1564 } 1565 1566 /* 1567 * The system image GUID is supposed to be the same for all 1568 * IB HCAs in a single system but since there can be other 1569 * device types in the system, we can't be sure this is unique. 1570 */ 1571 if (!ib_qib_sys_image_guid) 1572 ib_qib_sys_image_guid = ppd->guid; 1573 1574 ibdev->owner = THIS_MODULE; 1575 ibdev->node_guid = ppd->guid; 1576 ibdev->phys_port_cnt = dd->num_pports; 1577 ibdev->dev.parent = &dd->pcidev->dev; 1578 ibdev->modify_device = qib_modify_device; 1579 ibdev->process_mad = qib_process_mad; 1580 1581 snprintf(ibdev->node_desc, sizeof(ibdev->node_desc), 1582 "Intel Infiniband HCA %s", init_utsname()->nodename); 1583 1584 /* 1585 * Fill in rvt info object. 1586 */ 1587 dd->verbs_dev.rdi.driver_f.port_callback = qib_create_port_files; 1588 dd->verbs_dev.rdi.driver_f.get_pci_dev = qib_get_pci_dev; 1589 dd->verbs_dev.rdi.driver_f.check_ah = qib_check_ah; 1590 dd->verbs_dev.rdi.driver_f.check_send_wqe = qib_check_send_wqe; 1591 dd->verbs_dev.rdi.driver_f.notify_new_ah = qib_notify_new_ah; 1592 dd->verbs_dev.rdi.driver_f.alloc_qpn = qib_alloc_qpn; 1593 dd->verbs_dev.rdi.driver_f.qp_priv_alloc = qib_qp_priv_alloc; 1594 dd->verbs_dev.rdi.driver_f.qp_priv_free = qib_qp_priv_free; 1595 dd->verbs_dev.rdi.driver_f.free_all_qps = qib_free_all_qps; 1596 dd->verbs_dev.rdi.driver_f.notify_qp_reset = qib_notify_qp_reset; 1597 dd->verbs_dev.rdi.driver_f.do_send = qib_do_send; 1598 dd->verbs_dev.rdi.driver_f.schedule_send = qib_schedule_send; 1599 dd->verbs_dev.rdi.driver_f.quiesce_qp = qib_quiesce_qp; 1600 dd->verbs_dev.rdi.driver_f.stop_send_queue = qib_stop_send_queue; 1601 dd->verbs_dev.rdi.driver_f.flush_qp_waiters = qib_flush_qp_waiters; 1602 dd->verbs_dev.rdi.driver_f.notify_error_qp = qib_notify_error_qp; 1603 dd->verbs_dev.rdi.driver_f.notify_restart_rc = qib_restart_rc; 1604 dd->verbs_dev.rdi.driver_f.mtu_to_path_mtu = qib_mtu_to_path_mtu; 1605 dd->verbs_dev.rdi.driver_f.mtu_from_qp = qib_mtu_from_qp; 1606 dd->verbs_dev.rdi.driver_f.get_pmtu_from_attr = qib_get_pmtu_from_attr; 1607 dd->verbs_dev.rdi.driver_f.schedule_send_no_lock = _qib_schedule_send; 1608 dd->verbs_dev.rdi.driver_f.query_port_state = qib_query_port; 1609 dd->verbs_dev.rdi.driver_f.shut_down_port = qib_shut_down_port; 1610 dd->verbs_dev.rdi.driver_f.cap_mask_chg = qib_cap_mask_chg; 1611 dd->verbs_dev.rdi.driver_f.notify_create_mad_agent = 1612 qib_notify_create_mad_agent; 1613 dd->verbs_dev.rdi.driver_f.notify_free_mad_agent = 1614 qib_notify_free_mad_agent; 1615 1616 dd->verbs_dev.rdi.dparms.max_rdma_atomic = QIB_MAX_RDMA_ATOMIC; 1617 dd->verbs_dev.rdi.driver_f.get_guid_be = qib_get_guid_be; 1618 dd->verbs_dev.rdi.dparms.lkey_table_size = qib_lkey_table_size; 1619 dd->verbs_dev.rdi.dparms.qp_table_size = ib_qib_qp_table_size; 1620 dd->verbs_dev.rdi.dparms.qpn_start = 1; 1621 dd->verbs_dev.rdi.dparms.qpn_res_start = QIB_KD_QP; 1622 dd->verbs_dev.rdi.dparms.qpn_res_end = QIB_KD_QP; /* Reserve one QP */ 1623 dd->verbs_dev.rdi.dparms.qpn_inc = 1; 1624 dd->verbs_dev.rdi.dparms.qos_shift = 1; 1625 dd->verbs_dev.rdi.dparms.psn_mask = QIB_PSN_MASK; 1626 dd->verbs_dev.rdi.dparms.psn_shift = QIB_PSN_SHIFT; 1627 dd->verbs_dev.rdi.dparms.psn_modify_mask = QIB_PSN_MASK; 1628 dd->verbs_dev.rdi.dparms.nports = dd->num_pports; 1629 dd->verbs_dev.rdi.dparms.npkeys = qib_get_npkeys(dd); 1630 dd->verbs_dev.rdi.dparms.node = dd->assigned_node_id; 1631 dd->verbs_dev.rdi.dparms.core_cap_flags = RDMA_CORE_PORT_IBA_IB; 1632 dd->verbs_dev.rdi.dparms.max_mad_size = IB_MGMT_MAD_SIZE; 1633 1634 snprintf(dd->verbs_dev.rdi.dparms.cq_name, 1635 sizeof(dd->verbs_dev.rdi.dparms.cq_name), 1636 "qib_cq%d", dd->unit); 1637 1638 qib_fill_device_attr(dd); 1639 1640 ppd = dd->pport; 1641 for (i = 0; i < dd->num_pports; i++, ppd++) { 1642 ctxt = ppd->hw_pidx; 1643 rvt_init_port(&dd->verbs_dev.rdi, 1644 &ppd->ibport_data.rvp, 1645 i, 1646 dd->rcd[ctxt]->pkeys); 1647 } 1648 1649 ret = rvt_register_device(&dd->verbs_dev.rdi); 1650 if (ret) 1651 goto err_tx; 1652 1653 ret = qib_verbs_register_sysfs(dd); 1654 if (ret) 1655 goto err_class; 1656 1657 return ret; 1658 1659 err_class: 1660 rvt_unregister_device(&dd->verbs_dev.rdi); 1661 err_tx: 1662 while (!list_empty(&dev->txreq_free)) { 1663 struct list_head *l = dev->txreq_free.next; 1664 struct qib_verbs_txreq *tx; 1665 1666 list_del(l); 1667 tx = list_entry(l, struct qib_verbs_txreq, txreq.list); 1668 kfree(tx); 1669 } 1670 if (ppd->sdma_descq_cnt) 1671 dma_free_coherent(&dd->pcidev->dev, 1672 ppd->sdma_descq_cnt * 1673 sizeof(struct qib_pio_header), 1674 dev->pio_hdrs, dev->pio_hdrs_phys); 1675 err_hdrs: 1676 qib_dev_err(dd, "cannot register verbs: %d!\n", -ret); 1677 return ret; 1678 } 1679 1680 void qib_unregister_ib_device(struct qib_devdata *dd) 1681 { 1682 struct qib_ibdev *dev = &dd->verbs_dev; 1683 1684 qib_verbs_unregister_sysfs(dd); 1685 1686 rvt_unregister_device(&dd->verbs_dev.rdi); 1687 1688 if (!list_empty(&dev->piowait)) 1689 qib_dev_err(dd, "piowait list not empty!\n"); 1690 if (!list_empty(&dev->dmawait)) 1691 qib_dev_err(dd, "dmawait list not empty!\n"); 1692 if (!list_empty(&dev->txwait)) 1693 qib_dev_err(dd, "txwait list not empty!\n"); 1694 if (!list_empty(&dev->memwait)) 1695 qib_dev_err(dd, "memwait list not empty!\n"); 1696 1697 del_timer_sync(&dev->mem_timer); 1698 while (!list_empty(&dev->txreq_free)) { 1699 struct list_head *l = dev->txreq_free.next; 1700 struct qib_verbs_txreq *tx; 1701 1702 list_del(l); 1703 tx = list_entry(l, struct qib_verbs_txreq, txreq.list); 1704 kfree(tx); 1705 } 1706 if (dd->pport->sdma_descq_cnt) 1707 dma_free_coherent(&dd->pcidev->dev, 1708 dd->pport->sdma_descq_cnt * 1709 sizeof(struct qib_pio_header), 1710 dev->pio_hdrs, dev->pio_hdrs_phys); 1711 } 1712 1713 /** 1714 * _qib_schedule_send - schedule progress 1715 * @qp - the qp 1716 * 1717 * This schedules progress w/o regard to the s_flags. 1718 * 1719 * It is only used in post send, which doesn't hold 1720 * the s_lock. 1721 */ 1722 void _qib_schedule_send(struct rvt_qp *qp) 1723 { 1724 struct qib_ibport *ibp = 1725 to_iport(qp->ibqp.device, qp->port_num); 1726 struct qib_pportdata *ppd = ppd_from_ibp(ibp); 1727 struct qib_qp_priv *priv = qp->priv; 1728 1729 queue_work(ppd->qib_wq, &priv->s_work); 1730 } 1731 1732 /** 1733 * qib_schedule_send - schedule progress 1734 * @qp - the qp 1735 * 1736 * This schedules qp progress. The s_lock 1737 * should be held. 1738 */ 1739 void qib_schedule_send(struct rvt_qp *qp) 1740 { 1741 if (qib_send_ok(qp)) 1742 _qib_schedule_send(qp); 1743 } 1744