krping.c revision 297655
1/* 2 * Copyright (c) 2005 Ammasso, Inc. All rights reserved. 3 * Copyright (c) 2006-2009 Open Grid Computing, Inc. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34#include <sys/cdefs.h> 35__FBSDID("$FreeBSD: stable/10/sys/contrib/rdma/krping/krping.c 297655 2016-04-07 07:41:06Z hselasky $"); 36 37#include <linux/module.h> 38#include <linux/moduleparam.h> 39#include <linux/slab.h> 40#include <linux/err.h> 41#include <linux/string.h> 42#include <linux/list.h> 43#include <linux/in.h> 44#include <linux/device.h> 45#include <linux/pci.h> 46#include <linux/sched.h> 47 48#include <asm/atomic.h> 49 50#include <rdma/ib_verbs.h> 51#include <rdma/rdma_cm.h> 52 53#include "krping.h" 54#include "getopt.h" 55 56extern int krping_debug; 57#define DEBUG_LOG(cb, x...) if (krping_debug) krping_printf((cb)->cookie, x) 58#define PRINTF(cb, x...) krping_printf((cb)->cookie, x) 59 60MODULE_AUTHOR("Steve Wise"); 61MODULE_DESCRIPTION("RDMA ping client/server"); 62MODULE_LICENSE("Dual BSD/GPL"); 63 64static __inline uint64_t 65get_cycles(void) 66{ 67 uint32_t low, high; 68 __asm __volatile("rdtsc" : "=a" (low), "=d" (high)); 69 return (low | ((u_int64_t)high << 32)); 70} 71 72typedef uint64_t cycles_t; 73 74enum mem_type { 75 DMA = 1, 76 FASTREG = 2, 77 MW = 3, 78 MR = 4 79}; 80 81static const struct krping_option krping_opts[] = { 82 {"count", OPT_INT, 'C'}, 83 {"size", OPT_INT, 'S'}, 84 {"addr", OPT_STRING, 'a'}, 85 {"port", OPT_INT, 'p'}, 86 {"verbose", OPT_NOPARAM, 'v'}, 87 {"validate", OPT_NOPARAM, 'V'}, 88 {"server", OPT_NOPARAM, 's'}, 89 {"client", OPT_NOPARAM, 'c'}, 90 {"mem_mode", OPT_STRING, 'm'}, 91 {"server_inv", OPT_NOPARAM, 'I'}, 92 {"wlat", OPT_NOPARAM, 'l'}, 93 {"rlat", OPT_NOPARAM, 'L'}, 94 {"bw", OPT_NOPARAM, 'B'}, 95 {"duplex", OPT_NOPARAM, 'd'}, 96 {"txdepth", OPT_INT, 'T'}, 97 {"poll", OPT_NOPARAM, 'P'}, 98 {"local_dma_lkey", OPT_NOPARAM, 'Z'}, 99 {"read_inv", OPT_NOPARAM, 'R'}, 100 {"fr", OPT_NOPARAM, 'f'}, 101 {NULL, 0, 0} 102}; 103 104#define htonll(x) cpu_to_be64((x)) 105#define ntohll(x) cpu_to_be64((x)) 106 107static struct mutex krping_mutex; 108 109/* 110 * List of running krping threads. 111 */ 112static LIST_HEAD(krping_cbs); 113 114/* 115 * krping "ping/pong" loop: 116 * client sends source rkey/addr/len 117 * server receives source rkey/add/len 118 * server rdma reads "ping" data from source 119 * server sends "go ahead" on rdma read completion 120 * client sends sink rkey/addr/len 121 * server receives sink rkey/addr/len 122 * server rdma writes "pong" data to sink 123 * server sends "go ahead" on rdma write completion 124 * <repeat loop> 125 */ 126 127/* 128 * These states are used to signal events between the completion handler 129 * and the main client or server thread. 130 * 131 * Once CONNECTED, they cycle through RDMA_READ_ADV, RDMA_WRITE_ADV, 132 * and RDMA_WRITE_COMPLETE for each ping. 133 */ 134enum test_state { 135 IDLE = 1, 136 CONNECT_REQUEST, 137 ADDR_RESOLVED, 138 ROUTE_RESOLVED, 139 CONNECTED, 140 RDMA_READ_ADV, 141 RDMA_READ_COMPLETE, 142 RDMA_WRITE_ADV, 143 RDMA_WRITE_COMPLETE, 144 ERROR 145}; 146 147struct krping_rdma_info { 148 uint64_t buf; 149 uint32_t rkey; 150 uint32_t size; 151}; 152 153/* 154 * Default max buffer size for IO... 155 */ 156#define RPING_BUFSIZE 128*1024 157#define RPING_SQ_DEPTH 64 158 159/* 160 * Control block struct. 161 */ 162struct krping_cb { 163 void *cookie; 164 int server; /* 0 iff client */ 165 struct ib_cq *cq; 166 struct ib_pd *pd; 167 struct ib_qp *qp; 168 169 enum mem_type mem; 170 struct ib_mr *dma_mr; 171 172 struct ib_fast_reg_page_list *page_list; 173 int page_list_len; 174 struct ib_send_wr fastreg_wr; 175 struct ib_send_wr invalidate_wr; 176 struct ib_mr *fastreg_mr; 177 int server_invalidate; 178 int read_inv; 179 u8 key; 180 181 struct ib_mw *mw; 182 struct ib_mw_bind bind_attr; 183 184 struct ib_recv_wr rq_wr; /* recv work request record */ 185 struct ib_sge recv_sgl; /* recv single SGE */ 186 struct krping_rdma_info recv_buf;/* malloc'd buffer */ 187 u64 recv_dma_addr; 188 DECLARE_PCI_UNMAP_ADDR(recv_mapping) 189 struct ib_mr *recv_mr; 190 191 struct ib_send_wr sq_wr; /* send work requrest record */ 192 struct ib_sge send_sgl; 193 struct krping_rdma_info send_buf;/* single send buf */ 194 u64 send_dma_addr; 195 DECLARE_PCI_UNMAP_ADDR(send_mapping) 196 struct ib_mr *send_mr; 197 198 struct ib_send_wr rdma_sq_wr; /* rdma work request record */ 199 struct ib_sge rdma_sgl; /* rdma single SGE */ 200 char *rdma_buf; /* used as rdma sink */ 201 u64 rdma_dma_addr; 202 DECLARE_PCI_UNMAP_ADDR(rdma_mapping) 203 struct ib_mr *rdma_mr; 204 205 uint32_t remote_rkey; /* remote guys RKEY */ 206 uint64_t remote_addr; /* remote guys TO */ 207 uint32_t remote_len; /* remote guys LEN */ 208 209 char *start_buf; /* rdma read src */ 210 u64 start_dma_addr; 211 DECLARE_PCI_UNMAP_ADDR(start_mapping) 212 struct ib_mr *start_mr; 213 214 enum test_state state; /* used for cond/signalling */ 215 wait_queue_head_t sem; 216 struct krping_stats stats; 217 218 uint16_t port; /* dst port in NBO */ 219 struct in_addr addr; /* dst addr in NBO */ 220 char *addr_str; /* dst addr string */ 221 int verbose; /* verbose logging */ 222 int count; /* ping count */ 223 int size; /* ping data size */ 224 int validate; /* validate ping data */ 225 int wlat; /* run wlat test */ 226 int rlat; /* run rlat test */ 227 int bw; /* run bw test */ 228 int duplex; /* run bw full duplex test */ 229 int poll; /* poll or block for rlat test */ 230 int txdepth; /* SQ depth */ 231 int local_dma_lkey; /* use 0 for lkey */ 232 int frtest; /* fastreg test */ 233 234 /* CM stuff */ 235 struct rdma_cm_id *cm_id; /* connection on client side,*/ 236 /* listener on server side. */ 237 struct rdma_cm_id *child_cm_id; /* connection on server side */ 238 struct list_head list; 239}; 240 241static int krping_cma_event_handler(struct rdma_cm_id *cma_id, 242 struct rdma_cm_event *event) 243{ 244 int ret; 245 struct krping_cb *cb = cma_id->context; 246 247 DEBUG_LOG(cb, "cma_event type %d cma_id %p (%s)\n", event->event, 248 cma_id, (cma_id == cb->cm_id) ? "parent" : "child"); 249 250 switch (event->event) { 251 case RDMA_CM_EVENT_ADDR_RESOLVED: 252 cb->state = ADDR_RESOLVED; 253 ret = rdma_resolve_route(cma_id, 2000); 254 if (ret) { 255 PRINTF(cb, "rdma_resolve_route error %d\n", ret); 256 wake_up_interruptible(&cb->sem); 257 } 258 break; 259 260 case RDMA_CM_EVENT_ROUTE_RESOLVED: 261 cb->state = ROUTE_RESOLVED; 262 cb->child_cm_id = cma_id; 263 wake_up_interruptible(&cb->sem); 264 break; 265 266 case RDMA_CM_EVENT_CONNECT_REQUEST: 267 cb->state = CONNECT_REQUEST; 268 cb->child_cm_id = cma_id; 269 DEBUG_LOG(cb, "child cma %p\n", cb->child_cm_id); 270 wake_up_interruptible(&cb->sem); 271 break; 272 273 case RDMA_CM_EVENT_ESTABLISHED: 274 DEBUG_LOG(cb, "ESTABLISHED\n"); 275 if (!cb->server) { 276 cb->state = CONNECTED; 277 } 278 wake_up_interruptible(&cb->sem); 279 break; 280 281 case RDMA_CM_EVENT_ADDR_ERROR: 282 case RDMA_CM_EVENT_ROUTE_ERROR: 283 case RDMA_CM_EVENT_CONNECT_ERROR: 284 case RDMA_CM_EVENT_UNREACHABLE: 285 case RDMA_CM_EVENT_REJECTED: 286 PRINTF(cb, "cma event %d, error %d\n", event->event, 287 event->status); 288 cb->state = ERROR; 289 wake_up_interruptible(&cb->sem); 290 break; 291 292 case RDMA_CM_EVENT_DISCONNECTED: 293 PRINTF(cb, "DISCONNECT EVENT...\n"); 294 cb->state = ERROR; 295 wake_up_interruptible(&cb->sem); 296 break; 297 298 case RDMA_CM_EVENT_DEVICE_REMOVAL: 299 PRINTF(cb, "cma detected device removal!!!!\n"); 300 break; 301 302 default: 303 PRINTF(cb, "oof bad type!\n"); 304 wake_up_interruptible(&cb->sem); 305 break; 306 } 307 return 0; 308} 309 310static int server_recv(struct krping_cb *cb, struct ib_wc *wc) 311{ 312 if (wc->byte_len != sizeof(cb->recv_buf)) { 313 PRINTF(cb, "Received bogus data, size %d\n", 314 wc->byte_len); 315 return -1; 316 } 317 318 cb->remote_rkey = ntohl(cb->recv_buf.rkey); 319 cb->remote_addr = ntohll(cb->recv_buf.buf); 320 cb->remote_len = ntohl(cb->recv_buf.size); 321 DEBUG_LOG(cb, "Received rkey %x addr %llx len %d from peer\n", 322 cb->remote_rkey, (unsigned long long)cb->remote_addr, 323 cb->remote_len); 324 325 if (cb->state <= CONNECTED || cb->state == RDMA_WRITE_COMPLETE) 326 cb->state = RDMA_READ_ADV; 327 else 328 cb->state = RDMA_WRITE_ADV; 329 330 return 0; 331} 332 333static int client_recv(struct krping_cb *cb, struct ib_wc *wc) 334{ 335 if (wc->byte_len != sizeof(cb->recv_buf)) { 336 PRINTF(cb, "Received bogus data, size %d\n", 337 wc->byte_len); 338 return -1; 339 } 340 341 if (cb->state == RDMA_READ_ADV) 342 cb->state = RDMA_WRITE_ADV; 343 else 344 cb->state = RDMA_WRITE_COMPLETE; 345 346 return 0; 347} 348 349static void krping_cq_event_handler(struct ib_cq *cq, void *ctx) 350{ 351 struct krping_cb *cb = ctx; 352 struct ib_wc wc; 353 struct ib_recv_wr *bad_wr; 354 int ret; 355 356 BUG_ON(cb->cq != cq); 357 if (cb->state == ERROR) { 358 PRINTF(cb, "cq completion in ERROR state\n"); 359 return; 360 } 361 if (cb->frtest) { 362 PRINTF(cb, "cq completion event in frtest!\n"); 363 return; 364 } 365 if (!cb->wlat && !cb->rlat && !cb->bw) 366 ib_req_notify_cq(cb->cq, IB_CQ_NEXT_COMP); 367 while ((ret = ib_poll_cq(cb->cq, 1, &wc)) == 1) { 368 if (wc.status) { 369 if (wc.status == IB_WC_WR_FLUSH_ERR) { 370 DEBUG_LOG(cb, "cq flushed\n"); 371 continue; 372 } else { 373 PRINTF(cb, "cq completion failed with " 374 "wr_id %Lx status %d opcode %d vender_err %x\n", 375 wc.wr_id, wc.status, wc.opcode, wc.vendor_err); 376 goto error; 377 } 378 } 379 380 switch (wc.opcode) { 381 case IB_WC_SEND: 382 DEBUG_LOG(cb, "send completion\n"); 383 cb->stats.send_bytes += cb->send_sgl.length; 384 cb->stats.send_msgs++; 385 break; 386 387 case IB_WC_RDMA_WRITE: 388 DEBUG_LOG(cb, "rdma write completion\n"); 389 cb->stats.write_bytes += cb->rdma_sq_wr.sg_list->length; 390 cb->stats.write_msgs++; 391 cb->state = RDMA_WRITE_COMPLETE; 392 wake_up_interruptible(&cb->sem); 393 break; 394 395 case IB_WC_RDMA_READ: 396 DEBUG_LOG(cb, "rdma read completion\n"); 397 cb->stats.read_bytes += cb->rdma_sq_wr.sg_list->length; 398 cb->stats.read_msgs++; 399 cb->state = RDMA_READ_COMPLETE; 400 wake_up_interruptible(&cb->sem); 401 break; 402 403 case IB_WC_RECV: 404 DEBUG_LOG(cb, "recv completion\n"); 405 cb->stats.recv_bytes += sizeof(cb->recv_buf); 406 cb->stats.recv_msgs++; 407 if (cb->wlat || cb->rlat || cb->bw) 408 ret = server_recv(cb, &wc); 409 else 410 ret = cb->server ? server_recv(cb, &wc) : 411 client_recv(cb, &wc); 412 if (ret) { 413 PRINTF(cb, "recv wc error: %d\n", ret); 414 goto error; 415 } 416 417 ret = ib_post_recv(cb->qp, &cb->rq_wr, &bad_wr); 418 if (ret) { 419 PRINTF(cb, "post recv error: %d\n", 420 ret); 421 goto error; 422 } 423 wake_up_interruptible(&cb->sem); 424 break; 425 426 default: 427 PRINTF(cb, 428 "%s:%d Unexpected opcode %d, Shutting down\n", 429 __func__, __LINE__, wc.opcode); 430 goto error; 431 } 432 } 433 if (ret) { 434 PRINTF(cb, "poll error %d\n", ret); 435 goto error; 436 } 437 return; 438error: 439 cb->state = ERROR; 440 wake_up_interruptible(&cb->sem); 441} 442 443static int krping_accept(struct krping_cb *cb) 444{ 445 struct rdma_conn_param conn_param; 446 int ret; 447 448 DEBUG_LOG(cb, "accepting client connection request\n"); 449 450 memset(&conn_param, 0, sizeof conn_param); 451 conn_param.responder_resources = 1; 452 conn_param.initiator_depth = 1; 453 454 ret = rdma_accept(cb->child_cm_id, &conn_param); 455 if (ret) { 456 PRINTF(cb, "rdma_accept error: %d\n", ret); 457 return ret; 458 } 459 460 if (!cb->wlat && !cb->rlat && !cb->bw) { 461 wait_event_interruptible(cb->sem, cb->state >= CONNECTED); 462 if (cb->state == ERROR) { 463 PRINTF(cb, "wait for CONNECTED state %d\n", 464 cb->state); 465 return -1; 466 } 467 } 468 return 0; 469} 470 471static void krping_setup_wr(struct krping_cb *cb) 472{ 473 cb->recv_sgl.addr = cb->recv_dma_addr; 474 cb->recv_sgl.length = sizeof cb->recv_buf; 475 if (cb->local_dma_lkey) 476 cb->recv_sgl.lkey = cb->qp->device->local_dma_lkey; 477 else if (cb->mem == DMA) 478 cb->recv_sgl.lkey = cb->dma_mr->lkey; 479 else 480 cb->recv_sgl.lkey = cb->recv_mr->lkey; 481 cb->rq_wr.sg_list = &cb->recv_sgl; 482 cb->rq_wr.num_sge = 1; 483 484 cb->send_sgl.addr = cb->send_dma_addr; 485 cb->send_sgl.length = sizeof cb->send_buf; 486 if (cb->local_dma_lkey) 487 cb->send_sgl.lkey = cb->qp->device->local_dma_lkey; 488 else if (cb->mem == DMA) 489 cb->send_sgl.lkey = cb->dma_mr->lkey; 490 else 491 cb->send_sgl.lkey = cb->send_mr->lkey; 492 493 cb->sq_wr.opcode = IB_WR_SEND; 494 cb->sq_wr.send_flags = IB_SEND_SIGNALED; 495 cb->sq_wr.sg_list = &cb->send_sgl; 496 cb->sq_wr.num_sge = 1; 497 498 if (cb->server || cb->wlat || cb->rlat || cb->bw) { 499 cb->rdma_sgl.addr = cb->rdma_dma_addr; 500 if (cb->mem == MR) 501 cb->rdma_sgl.lkey = cb->rdma_mr->lkey; 502 cb->rdma_sq_wr.send_flags = IB_SEND_SIGNALED; 503 cb->rdma_sq_wr.sg_list = &cb->rdma_sgl; 504 cb->rdma_sq_wr.num_sge = 1; 505 } 506 507 switch(cb->mem) { 508 case FASTREG: 509 510 /* 511 * A chain of 2 WRs, INVALDATE_MR + FAST_REG_MR. 512 * both unsignaled. The client uses them to reregister 513 * the rdma buffers with a new key each iteration. 514 */ 515 cb->fastreg_wr.opcode = IB_WR_FAST_REG_MR; 516 cb->fastreg_wr.wr.fast_reg.page_shift = PAGE_SHIFT; 517 cb->fastreg_wr.wr.fast_reg.length = cb->size; 518 cb->fastreg_wr.wr.fast_reg.page_list = cb->page_list; 519 cb->fastreg_wr.wr.fast_reg.page_list_len = cb->page_list_len; 520 521 cb->invalidate_wr.next = &cb->fastreg_wr; 522 cb->invalidate_wr.opcode = IB_WR_LOCAL_INV; 523 break; 524 case MW: 525 cb->bind_attr.wr_id = 0xabbaabba; 526 cb->bind_attr.send_flags = 0; /* unsignaled */ 527 cb->bind_attr.length = cb->size; 528 break; 529 default: 530 break; 531 } 532} 533 534static int krping_setup_buffers(struct krping_cb *cb) 535{ 536 int ret; 537 struct ib_phys_buf buf; 538 u64 iovbase; 539 540 DEBUG_LOG(cb, "krping_setup_buffers called on cb %p\n", cb); 541 542 cb->recv_dma_addr = dma_map_single(cb->pd->device->dma_device, 543 &cb->recv_buf, 544 sizeof(cb->recv_buf), DMA_BIDIRECTIONAL); 545 pci_unmap_addr_set(cb, recv_mapping, cb->recv_dma_addr); 546 cb->send_dma_addr = dma_map_single(cb->pd->device->dma_device, 547 &cb->send_buf, sizeof(cb->send_buf), 548 DMA_BIDIRECTIONAL); 549 pci_unmap_addr_set(cb, send_mapping, cb->send_dma_addr); 550 551 if (cb->mem == DMA) { 552 cb->dma_mr = ib_get_dma_mr(cb->pd, IB_ACCESS_LOCAL_WRITE| 553 IB_ACCESS_REMOTE_READ| 554 IB_ACCESS_REMOTE_WRITE); 555 if (IS_ERR(cb->dma_mr)) { 556 DEBUG_LOG(cb, "reg_dmamr failed\n"); 557 ret = PTR_ERR(cb->dma_mr); 558 goto bail; 559 } 560 } else { 561 if (!cb->local_dma_lkey) { 562 buf.addr = cb->recv_dma_addr; 563 buf.size = sizeof cb->recv_buf; 564 DEBUG_LOG(cb, "recv buf dma_addr %llx size %d\n", buf.addr, 565 (int)buf.size); 566 iovbase = cb->recv_dma_addr; 567 cb->recv_mr = ib_reg_phys_mr(cb->pd, &buf, 1, 568 IB_ACCESS_LOCAL_WRITE, 569 &iovbase); 570 571 if (IS_ERR(cb->recv_mr)) { 572 DEBUG_LOG(cb, "recv_buf reg_mr failed\n"); 573 ret = PTR_ERR(cb->recv_mr); 574 goto bail; 575 } 576 577 buf.addr = cb->send_dma_addr; 578 buf.size = sizeof cb->send_buf; 579 DEBUG_LOG(cb, "send buf dma_addr %llx size %d\n", buf.addr, 580 (int)buf.size); 581 iovbase = cb->send_dma_addr; 582 cb->send_mr = ib_reg_phys_mr(cb->pd, &buf, 1, 583 0, &iovbase); 584 585 if (IS_ERR(cb->send_mr)) { 586 DEBUG_LOG(cb, "send_buf reg_mr failed\n"); 587 ret = PTR_ERR(cb->send_mr); 588 goto bail; 589 } 590 } 591 } 592 593 cb->rdma_buf = kmalloc(cb->size, GFP_KERNEL); 594 if (!cb->rdma_buf) { 595 DEBUG_LOG(cb, "rdma_buf malloc failed\n"); 596 ret = -ENOMEM; 597 goto bail; 598 } 599 600 cb->rdma_dma_addr = dma_map_single(cb->pd->device->dma_device, 601 cb->rdma_buf, cb->size, 602 DMA_BIDIRECTIONAL); 603 pci_unmap_addr_set(cb, rdma_mapping, cb->rdma_dma_addr); 604 if (cb->mem != DMA) { 605 switch (cb->mem) { 606 case FASTREG: 607 cb->page_list_len = (((cb->size - 1) & PAGE_MASK) + 608 PAGE_SIZE) >> PAGE_SHIFT; 609 cb->page_list = ib_alloc_fast_reg_page_list( 610 cb->pd->device, 611 cb->page_list_len); 612 if (IS_ERR(cb->page_list)) { 613 DEBUG_LOG(cb, "recv_buf reg_mr failed\n"); 614 ret = PTR_ERR(cb->page_list); 615 goto bail; 616 } 617 cb->fastreg_mr = ib_alloc_fast_reg_mr(cb->pd, 618 cb->page_list->max_page_list_len); 619 if (IS_ERR(cb->fastreg_mr)) { 620 DEBUG_LOG(cb, "recv_buf reg_mr failed\n"); 621 ret = PTR_ERR(cb->fastreg_mr); 622 goto bail; 623 } 624 DEBUG_LOG(cb, "fastreg rkey 0x%x page_list %p" 625 " page_list_len %u\n", cb->fastreg_mr->rkey, 626 cb->page_list, cb->page_list_len); 627 break; 628 case MW: 629 cb->mw = ib_alloc_mw(cb->pd); 630 if (IS_ERR(cb->mw)) { 631 DEBUG_LOG(cb, "recv_buf alloc_mw failed\n"); 632 ret = PTR_ERR(cb->mw); 633 goto bail; 634 } 635 DEBUG_LOG(cb, "mw rkey 0x%x\n", cb->mw->rkey); 636 /*FALLTHROUGH*/ 637 case MR: 638 buf.addr = cb->rdma_dma_addr; 639 buf.size = cb->size; 640 iovbase = cb->rdma_dma_addr; 641 cb->rdma_mr = ib_reg_phys_mr(cb->pd, &buf, 1, 642 IB_ACCESS_REMOTE_READ| 643 IB_ACCESS_REMOTE_WRITE, 644 &iovbase); 645 if (IS_ERR(cb->rdma_mr)) { 646 DEBUG_LOG(cb, "rdma_buf reg_mr failed\n"); 647 ret = PTR_ERR(cb->rdma_mr); 648 goto bail; 649 } 650 DEBUG_LOG(cb, "rdma buf dma_addr %llx size %d mr rkey 0x%x\n", 651 buf.addr, (int)buf.size, cb->rdma_mr->rkey); 652 break; 653 default: 654 ret = -EINVAL; 655 goto bail; 656 break; 657 } 658 } 659 660 if (!cb->server || cb->wlat || cb->rlat || cb->bw) { 661 662 cb->start_buf = kmalloc(cb->size, GFP_KERNEL); 663 if (!cb->start_buf) { 664 DEBUG_LOG(cb, "start_buf malloc failed\n"); 665 ret = -ENOMEM; 666 goto bail; 667 } 668 669 cb->start_dma_addr = dma_map_single(cb->pd->device->dma_device, 670 cb->start_buf, cb->size, 671 DMA_BIDIRECTIONAL); 672 pci_unmap_addr_set(cb, start_mapping, cb->start_dma_addr); 673 674 if (cb->mem == MR || cb->mem == MW) { 675 unsigned flags = IB_ACCESS_REMOTE_READ; 676 677 if (cb->wlat || cb->rlat || cb->bw) 678 flags |= IB_ACCESS_REMOTE_WRITE; 679 680 buf.addr = cb->start_dma_addr; 681 buf.size = cb->size; 682 DEBUG_LOG(cb, "start buf dma_addr %llx size %d\n", 683 buf.addr, (int)buf.size); 684 iovbase = cb->start_dma_addr; 685 cb->start_mr = ib_reg_phys_mr(cb->pd, &buf, 1, 686 flags, 687 &iovbase); 688 689 if (IS_ERR(cb->start_mr)) { 690 DEBUG_LOG(cb, "start_buf reg_mr failed\n"); 691 ret = PTR_ERR(cb->start_mr); 692 goto bail; 693 } 694 } 695 } 696 697 krping_setup_wr(cb); 698 DEBUG_LOG(cb, "allocated & registered buffers...\n"); 699 return 0; 700bail: 701 if (cb->fastreg_mr && !IS_ERR(cb->fastreg_mr)) 702 ib_dereg_mr(cb->fastreg_mr); 703 if (cb->mw && !IS_ERR(cb->mw)) 704 ib_dealloc_mw(cb->mw); 705 if (cb->rdma_mr && !IS_ERR(cb->rdma_mr)) 706 ib_dereg_mr(cb->rdma_mr); 707 if (cb->page_list && !IS_ERR(cb->page_list)) 708 ib_free_fast_reg_page_list(cb->page_list); 709 if (cb->dma_mr && !IS_ERR(cb->dma_mr)) 710 ib_dereg_mr(cb->dma_mr); 711 if (cb->recv_mr && !IS_ERR(cb->recv_mr)) 712 ib_dereg_mr(cb->recv_mr); 713 if (cb->send_mr && !IS_ERR(cb->send_mr)) 714 ib_dereg_mr(cb->send_mr); 715 if (cb->rdma_buf) 716 kfree(cb->rdma_buf); 717 if (cb->start_buf) 718 kfree(cb->start_buf); 719 return ret; 720} 721 722static void krping_free_buffers(struct krping_cb *cb) 723{ 724 DEBUG_LOG(cb, "krping_free_buffers called on cb %p\n", cb); 725 726 if (cb->dma_mr) 727 ib_dereg_mr(cb->dma_mr); 728 if (cb->send_mr) 729 ib_dereg_mr(cb->send_mr); 730 if (cb->recv_mr) 731 ib_dereg_mr(cb->recv_mr); 732 if (cb->rdma_mr) 733 ib_dereg_mr(cb->rdma_mr); 734 if (cb->start_mr) 735 ib_dereg_mr(cb->start_mr); 736 if (cb->fastreg_mr) 737 ib_dereg_mr(cb->fastreg_mr); 738 if (cb->mw) 739 ib_dealloc_mw(cb->mw); 740 741 dma_unmap_single(cb->pd->device->dma_device, 742 pci_unmap_addr(cb, recv_mapping), 743 sizeof(cb->recv_buf), DMA_BIDIRECTIONAL); 744 dma_unmap_single(cb->pd->device->dma_device, 745 pci_unmap_addr(cb, send_mapping), 746 sizeof(cb->send_buf), DMA_BIDIRECTIONAL); 747 dma_unmap_single(cb->pd->device->dma_device, 748 pci_unmap_addr(cb, rdma_mapping), 749 cb->size, DMA_BIDIRECTIONAL); 750 kfree(cb->rdma_buf); 751 if (cb->start_buf) { 752 dma_unmap_single(cb->pd->device->dma_device, 753 pci_unmap_addr(cb, start_mapping), 754 cb->size, DMA_BIDIRECTIONAL); 755 kfree(cb->start_buf); 756 } 757} 758 759static int krping_create_qp(struct krping_cb *cb) 760{ 761 struct ib_qp_init_attr init_attr; 762 int ret; 763 764 memset(&init_attr, 0, sizeof(init_attr)); 765 init_attr.cap.max_send_wr = cb->txdepth; 766 init_attr.cap.max_recv_wr = 2; 767 init_attr.cap.max_recv_sge = 1; 768 init_attr.cap.max_send_sge = 1; 769 init_attr.qp_type = IB_QPT_RC; 770 init_attr.send_cq = cb->cq; 771 init_attr.recv_cq = cb->cq; 772 init_attr.sq_sig_type = IB_SIGNAL_REQ_WR; 773 774 if (cb->server) { 775 ret = rdma_create_qp(cb->child_cm_id, cb->pd, &init_attr); 776 if (!ret) 777 cb->qp = cb->child_cm_id->qp; 778 } else { 779 ret = rdma_create_qp(cb->cm_id, cb->pd, &init_attr); 780 if (!ret) 781 cb->qp = cb->cm_id->qp; 782 } 783 784 return ret; 785} 786 787static void krping_free_qp(struct krping_cb *cb) 788{ 789 ib_destroy_qp(cb->qp); 790 ib_destroy_cq(cb->cq); 791 ib_dealloc_pd(cb->pd); 792} 793 794static int krping_setup_qp(struct krping_cb *cb, struct rdma_cm_id *cm_id) 795{ 796 int ret; 797 cb->pd = ib_alloc_pd(cm_id->device); 798 if (IS_ERR(cb->pd)) { 799 PRINTF(cb, "ib_alloc_pd failed\n"); 800 return PTR_ERR(cb->pd); 801 } 802 DEBUG_LOG(cb, "created pd %p\n", cb->pd); 803 804 strlcpy(cb->stats.name, cb->pd->device->name, sizeof(cb->stats.name)); 805 806 cb->cq = ib_create_cq(cm_id->device, krping_cq_event_handler, NULL, 807 cb, cb->txdepth * 2, 0); 808 if (IS_ERR(cb->cq)) { 809 PRINTF(cb, "ib_create_cq failed\n"); 810 ret = PTR_ERR(cb->cq); 811 goto err1; 812 } 813 DEBUG_LOG(cb, "created cq %p\n", cb->cq); 814 815 if (!cb->wlat && !cb->rlat && !cb->bw && !cb->frtest) { 816 ret = ib_req_notify_cq(cb->cq, IB_CQ_NEXT_COMP); 817 if (ret) { 818 PRINTF(cb, "ib_create_cq failed\n"); 819 goto err2; 820 } 821 } 822 823 ret = krping_create_qp(cb); 824 if (ret) { 825 PRINTF(cb, "krping_create_qp failed: %d\n", ret); 826 goto err2; 827 } 828 DEBUG_LOG(cb, "created qp %p\n", cb->qp); 829 return 0; 830err2: 831 ib_destroy_cq(cb->cq); 832err1: 833 ib_dealloc_pd(cb->pd); 834 return ret; 835} 836 837/* 838 * return the (possibly rebound) rkey for the rdma buffer. 839 * FASTREG mode: invalidate and rebind via fastreg wr. 840 * MW mode: rebind the MW. 841 * other modes: just return the mr rkey. 842 */ 843static u32 krping_rdma_rkey(struct krping_cb *cb, u64 buf, int post_inv) 844{ 845 u32 rkey = 0xffffffff; 846 u64 p; 847 struct ib_send_wr *bad_wr; 848 int i; 849 int ret; 850 851 switch (cb->mem) { 852 case FASTREG: 853 cb->invalidate_wr.ex.invalidate_rkey = cb->fastreg_mr->rkey; 854 855 /* 856 * Update the fastreg key. 857 */ 858 ib_update_fast_reg_key(cb->fastreg_mr, ++cb->key); 859 cb->fastreg_wr.wr.fast_reg.rkey = cb->fastreg_mr->rkey; 860 861 /* 862 * Update the fastreg WR with new buf info. 863 */ 864 if (buf == (u64)cb->start_dma_addr) 865 cb->fastreg_wr.wr.fast_reg.access_flags = IB_ACCESS_REMOTE_READ; 866 else 867 cb->fastreg_wr.wr.fast_reg.access_flags = IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE; 868 cb->fastreg_wr.wr.fast_reg.iova_start = buf; 869 p = (u64)(buf & PAGE_MASK); 870 for (i=0; i < cb->fastreg_wr.wr.fast_reg.page_list_len; 871 i++, p += PAGE_SIZE) { 872 cb->page_list->page_list[i] = p; 873 DEBUG_LOG(cb, "page_list[%d] 0x%llx\n", i, p); 874 } 875 876 DEBUG_LOG(cb, "post_inv = %d, fastreg new rkey 0x%x shift %u len %u" 877 " iova_start %llx page_list_len %u\n", 878 post_inv, 879 cb->fastreg_wr.wr.fast_reg.rkey, 880 cb->fastreg_wr.wr.fast_reg.page_shift, 881 cb->fastreg_wr.wr.fast_reg.length, 882 cb->fastreg_wr.wr.fast_reg.iova_start, 883 cb->fastreg_wr.wr.fast_reg.page_list_len); 884 885 if (post_inv) 886 ret = ib_post_send(cb->qp, &cb->invalidate_wr, &bad_wr); 887 else 888 ret = ib_post_send(cb->qp, &cb->fastreg_wr, &bad_wr); 889 if (ret) { 890 PRINTF(cb, "post send error %d\n", ret); 891 cb->state = ERROR; 892 } 893 rkey = cb->fastreg_mr->rkey; 894 break; 895 case MW: 896 /* 897 * Update the MW with new buf info. 898 */ 899 if (buf == (u64)cb->start_dma_addr) { 900 cb->bind_attr.mw_access_flags = IB_ACCESS_REMOTE_READ; 901 cb->bind_attr.mr = cb->start_mr; 902 } else { 903 cb->bind_attr.mw_access_flags = IB_ACCESS_REMOTE_WRITE; 904 cb->bind_attr.mr = cb->rdma_mr; 905 } 906 cb->bind_attr.addr = buf; 907 DEBUG_LOG(cb, "binding mw rkey 0x%x to buf %llx mr rkey 0x%x\n", 908 cb->mw->rkey, buf, cb->bind_attr.mr->rkey); 909 ret = ib_bind_mw(cb->qp, cb->mw, &cb->bind_attr); 910 if (ret) { 911 PRINTF(cb, "bind mw error %d\n", ret); 912 cb->state = ERROR; 913 } else 914 rkey = cb->mw->rkey; 915 break; 916 case MR: 917 if (buf == (u64)cb->start_dma_addr) 918 rkey = cb->start_mr->rkey; 919 else 920 rkey = cb->rdma_mr->rkey; 921 break; 922 case DMA: 923 rkey = cb->dma_mr->rkey; 924 break; 925 default: 926 PRINTF(cb, "%s:%d case ERROR\n", __func__, __LINE__); 927 cb->state = ERROR; 928 break; 929 } 930 return rkey; 931} 932 933static void krping_format_send(struct krping_cb *cb, u64 buf) 934{ 935 struct krping_rdma_info *info = &cb->send_buf; 936 u32 rkey; 937 938 /* 939 * Client side will do fastreg or mw bind before 940 * advertising the rdma buffer. Server side 941 * sends have no data. 942 */ 943 if (!cb->server || cb->wlat || cb->rlat || cb->bw) { 944 rkey = krping_rdma_rkey(cb, buf, !cb->server_invalidate); 945 info->buf = htonll(buf); 946 info->rkey = htonl(rkey); 947 info->size = htonl(cb->size); 948 DEBUG_LOG(cb, "RDMA addr %llx rkey %x len %d\n", 949 (unsigned long long)buf, rkey, cb->size); 950 } 951} 952 953static void krping_test_server(struct krping_cb *cb) 954{ 955 struct ib_send_wr *bad_wr, inv; 956 int ret; 957 958 while (1) { 959 /* Wait for client's Start STAG/TO/Len */ 960 wait_event_interruptible(cb->sem, cb->state >= RDMA_READ_ADV); 961 if (cb->state != RDMA_READ_ADV) { 962 PRINTF(cb, "wait for RDMA_READ_ADV state %d\n", 963 cb->state); 964 break; 965 } 966 967 DEBUG_LOG(cb, "server received sink adv\n"); 968 969 cb->rdma_sq_wr.wr.rdma.rkey = cb->remote_rkey; 970 cb->rdma_sq_wr.wr.rdma.remote_addr = cb->remote_addr; 971 cb->rdma_sq_wr.sg_list->length = cb->remote_len; 972 cb->rdma_sgl.lkey = krping_rdma_rkey(cb, cb->rdma_dma_addr, 1); 973 cb->rdma_sq_wr.next = NULL; 974 975 /* Issue RDMA Read. */ 976 if (cb->read_inv) 977 cb->rdma_sq_wr.opcode = IB_WR_RDMA_READ_WITH_INV; 978 else { 979 980 cb->rdma_sq_wr.opcode = IB_WR_RDMA_READ; 981 if (cb->mem == FASTREG) { 982 /* 983 * Immediately follow the read with a 984 * fenced LOCAL_INV. 985 */ 986 cb->rdma_sq_wr.next = &inv; 987 memset(&inv, 0, sizeof inv); 988 inv.opcode = IB_WR_LOCAL_INV; 989 inv.ex.invalidate_rkey = cb->fastreg_mr->rkey; 990 inv.send_flags = IB_SEND_FENCE; 991 } 992 } 993 994 ret = ib_post_send(cb->qp, &cb->rdma_sq_wr, &bad_wr); 995 if (ret) { 996 PRINTF(cb, "post send error %d\n", ret); 997 break; 998 } 999 cb->rdma_sq_wr.next = NULL; 1000 1001 DEBUG_LOG(cb, "server posted rdma read req \n"); 1002 1003 /* Wait for read completion */ 1004 wait_event_interruptible(cb->sem, 1005 cb->state >= RDMA_READ_COMPLETE); 1006 if (cb->state != RDMA_READ_COMPLETE) { 1007 PRINTF(cb, 1008 "wait for RDMA_READ_COMPLETE state %d\n", 1009 cb->state); 1010 break; 1011 } 1012 DEBUG_LOG(cb, "server received read complete\n"); 1013 1014 /* Display data in recv buf */ 1015 if (cb->verbose) 1016 PRINTF(cb, "server ping data: %s\n", 1017 cb->rdma_buf); 1018 1019 /* Tell client to continue */ 1020 if (cb->server && cb->server_invalidate) { 1021 cb->sq_wr.ex.invalidate_rkey = cb->remote_rkey; 1022 cb->sq_wr.opcode = IB_WR_SEND_WITH_INV; 1023 DEBUG_LOG(cb, "send-w-inv rkey 0x%x\n", cb->remote_rkey); 1024 } 1025 ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr); 1026 if (ret) { 1027 PRINTF(cb, "post send error %d\n", ret); 1028 break; 1029 } 1030 DEBUG_LOG(cb, "server posted go ahead\n"); 1031 1032 /* Wait for client's RDMA STAG/TO/Len */ 1033 wait_event_interruptible(cb->sem, cb->state >= RDMA_WRITE_ADV); 1034 if (cb->state != RDMA_WRITE_ADV) { 1035 PRINTF(cb, 1036 "wait for RDMA_WRITE_ADV state %d\n", 1037 cb->state); 1038 break; 1039 } 1040 DEBUG_LOG(cb, "server received sink adv\n"); 1041 1042 /* RDMA Write echo data */ 1043 cb->rdma_sq_wr.opcode = IB_WR_RDMA_WRITE; 1044 cb->rdma_sq_wr.wr.rdma.rkey = cb->remote_rkey; 1045 cb->rdma_sq_wr.wr.rdma.remote_addr = cb->remote_addr; 1046 cb->rdma_sq_wr.sg_list->length = strlen(cb->rdma_buf) + 1; 1047 if (cb->local_dma_lkey) 1048 cb->rdma_sgl.lkey = cb->qp->device->local_dma_lkey; 1049 else 1050 cb->rdma_sgl.lkey = krping_rdma_rkey(cb, cb->rdma_dma_addr, 0); 1051 1052 DEBUG_LOG(cb, "rdma write from lkey %x laddr %llx len %d\n", 1053 cb->rdma_sq_wr.sg_list->lkey, 1054 (unsigned long long)cb->rdma_sq_wr.sg_list->addr, 1055 cb->rdma_sq_wr.sg_list->length); 1056 1057 ret = ib_post_send(cb->qp, &cb->rdma_sq_wr, &bad_wr); 1058 if (ret) { 1059 PRINTF(cb, "post send error %d\n", ret); 1060 break; 1061 } 1062 1063 /* Wait for completion */ 1064 ret = wait_event_interruptible(cb->sem, cb->state >= 1065 RDMA_WRITE_COMPLETE); 1066 if (cb->state != RDMA_WRITE_COMPLETE) { 1067 PRINTF(cb, 1068 "wait for RDMA_WRITE_COMPLETE state %d\n", 1069 cb->state); 1070 break; 1071 } 1072 DEBUG_LOG(cb, "server rdma write complete \n"); 1073 1074 cb->state = CONNECTED; 1075 1076 /* Tell client to begin again */ 1077 if (cb->server && cb->server_invalidate) { 1078 cb->sq_wr.ex.invalidate_rkey = cb->remote_rkey; 1079 cb->sq_wr.opcode = IB_WR_SEND_WITH_INV; 1080 DEBUG_LOG(cb, "send-w-inv rkey 0x%x\n", cb->remote_rkey); 1081 } 1082 ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr); 1083 if (ret) { 1084 PRINTF(cb, "post send error %d\n", ret); 1085 break; 1086 } 1087 DEBUG_LOG(cb, "server posted go ahead\n"); 1088 } 1089} 1090 1091static void rlat_test(struct krping_cb *cb) 1092{ 1093 int scnt; 1094 int iters = cb->count; 1095 struct timeval start_tv, stop_tv; 1096 int ret; 1097 struct ib_wc wc; 1098 struct ib_send_wr *bad_wr; 1099 int ne; 1100 1101 scnt = 0; 1102 cb->rdma_sq_wr.opcode = IB_WR_RDMA_READ; 1103 cb->rdma_sq_wr.wr.rdma.rkey = cb->remote_rkey; 1104 cb->rdma_sq_wr.wr.rdma.remote_addr = cb->remote_addr; 1105 cb->rdma_sq_wr.sg_list->length = cb->size; 1106 1107 microtime(&start_tv); 1108 if (!cb->poll) { 1109 cb->state = RDMA_READ_ADV; 1110 ib_req_notify_cq(cb->cq, IB_CQ_NEXT_COMP); 1111 } 1112 while (scnt < iters) { 1113 1114 cb->state = RDMA_READ_ADV; 1115 ret = ib_post_send(cb->qp, &cb->rdma_sq_wr, &bad_wr); 1116 if (ret) { 1117 PRINTF(cb, 1118 "Couldn't post send: ret=%d scnt %d\n", 1119 ret, scnt); 1120 return; 1121 } 1122 1123 do { 1124 if (!cb->poll) { 1125 wait_event_interruptible(cb->sem, 1126 cb->state != RDMA_READ_ADV); 1127 if (cb->state == RDMA_READ_COMPLETE) { 1128 ne = 1; 1129 ib_req_notify_cq(cb->cq, 1130 IB_CQ_NEXT_COMP); 1131 } else { 1132 ne = -1; 1133 } 1134 } else 1135 ne = ib_poll_cq(cb->cq, 1, &wc); 1136 if (cb->state == ERROR) { 1137 PRINTF(cb, 1138 "state == ERROR...bailing scnt %d\n", 1139 scnt); 1140 return; 1141 } 1142 } while (ne == 0); 1143 1144 if (ne < 0) { 1145 PRINTF(cb, "poll CQ failed %d\n", ne); 1146 return; 1147 } 1148 if (cb->poll && wc.status != IB_WC_SUCCESS) { 1149 PRINTF(cb, "Completion wth error at %s:\n", 1150 cb->server ? "server" : "client"); 1151 PRINTF(cb, "Failed status %d: wr_id %d\n", 1152 wc.status, (int) wc.wr_id); 1153 return; 1154 } 1155 ++scnt; 1156 } 1157 microtime(&stop_tv); 1158 1159 if (stop_tv.tv_usec < start_tv.tv_usec) { 1160 stop_tv.tv_usec += 1000000; 1161 stop_tv.tv_sec -= 1; 1162 } 1163 1164 PRINTF(cb, "delta sec %lu delta usec %lu iter %d size %d\n", 1165 stop_tv.tv_sec - start_tv.tv_sec, 1166 stop_tv.tv_usec - start_tv.tv_usec, 1167 scnt, cb->size); 1168} 1169 1170static void wlat_test(struct krping_cb *cb) 1171{ 1172 int ccnt, scnt, rcnt; 1173 int iters=cb->count; 1174 volatile char *poll_buf = (char *) cb->start_buf; 1175 char *buf = (char *)cb->rdma_buf; 1176 struct timeval start_tv, stop_tv; 1177 cycles_t *post_cycles_start, *post_cycles_stop; 1178 cycles_t *poll_cycles_start, *poll_cycles_stop; 1179 cycles_t *last_poll_cycles_start; 1180 cycles_t sum_poll = 0, sum_post = 0, sum_last_poll = 0; 1181 int i; 1182 int cycle_iters = 1000; 1183 1184 ccnt = 0; 1185 scnt = 0; 1186 rcnt = 0; 1187 1188 post_cycles_start = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL); 1189 if (!post_cycles_start) { 1190 PRINTF(cb, "%s kmalloc failed\n", __FUNCTION__); 1191 return; 1192 } 1193 post_cycles_stop = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL); 1194 if (!post_cycles_stop) { 1195 PRINTF(cb, "%s kmalloc failed\n", __FUNCTION__); 1196 return; 1197 } 1198 poll_cycles_start = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL); 1199 if (!poll_cycles_start) { 1200 PRINTF(cb, "%s kmalloc failed\n", __FUNCTION__); 1201 return; 1202 } 1203 poll_cycles_stop = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL); 1204 if (!poll_cycles_stop) { 1205 PRINTF(cb, "%s kmalloc failed\n", __FUNCTION__); 1206 return; 1207 } 1208 last_poll_cycles_start = kmalloc(cycle_iters * sizeof(cycles_t), 1209 GFP_KERNEL); 1210 if (!last_poll_cycles_start) { 1211 PRINTF(cb, "%s kmalloc failed\n", __FUNCTION__); 1212 return; 1213 } 1214 cb->rdma_sq_wr.opcode = IB_WR_RDMA_WRITE; 1215 cb->rdma_sq_wr.wr.rdma.rkey = cb->remote_rkey; 1216 cb->rdma_sq_wr.wr.rdma.remote_addr = cb->remote_addr; 1217 cb->rdma_sq_wr.sg_list->length = cb->size; 1218 1219 if (cycle_iters > iters) 1220 cycle_iters = iters; 1221 microtime(&start_tv); 1222 while (scnt < iters || ccnt < iters || rcnt < iters) { 1223 1224 /* Wait till buffer changes. */ 1225 if (rcnt < iters && !(scnt < 1 && !cb->server)) { 1226 ++rcnt; 1227 while (*poll_buf != (char)rcnt) { 1228 if (cb->state == ERROR) { 1229 PRINTF(cb, 1230 "state = ERROR, bailing\n"); 1231 return; 1232 } 1233 } 1234 } 1235 1236 if (scnt < iters) { 1237 struct ib_send_wr *bad_wr; 1238 1239 *buf = (char)scnt+1; 1240 if (scnt < cycle_iters) 1241 post_cycles_start[scnt] = get_cycles(); 1242 if (ib_post_send(cb->qp, &cb->rdma_sq_wr, &bad_wr)) { 1243 PRINTF(cb, 1244 "Couldn't post send: scnt=%d\n", 1245 scnt); 1246 return; 1247 } 1248 if (scnt < cycle_iters) 1249 post_cycles_stop[scnt] = get_cycles(); 1250 scnt++; 1251 } 1252 1253 if (ccnt < iters) { 1254 struct ib_wc wc; 1255 int ne; 1256 1257 if (ccnt < cycle_iters) 1258 poll_cycles_start[ccnt] = get_cycles(); 1259 do { 1260 if (ccnt < cycle_iters) 1261 last_poll_cycles_start[ccnt] = 1262 get_cycles(); 1263 ne = ib_poll_cq(cb->cq, 1, &wc); 1264 } while (ne == 0); 1265 if (ccnt < cycle_iters) 1266 poll_cycles_stop[ccnt] = get_cycles(); 1267 ++ccnt; 1268 1269 if (ne < 0) { 1270 PRINTF(cb, "poll CQ failed %d\n", ne); 1271 return; 1272 } 1273 if (wc.status != IB_WC_SUCCESS) { 1274 PRINTF(cb, 1275 "Completion wth error at %s:\n", 1276 cb->server ? "server" : "client"); 1277 PRINTF(cb, 1278 "Failed status %d: wr_id %d\n", 1279 wc.status, (int) wc.wr_id); 1280 PRINTF(cb, 1281 "scnt=%d, rcnt=%d, ccnt=%d\n", 1282 scnt, rcnt, ccnt); 1283 return; 1284 } 1285 } 1286 } 1287 microtime(&stop_tv); 1288 1289 if (stop_tv.tv_usec < start_tv.tv_usec) { 1290 stop_tv.tv_usec += 1000000; 1291 stop_tv.tv_sec -= 1; 1292 } 1293 1294 for (i=0; i < cycle_iters; i++) { 1295 sum_post += post_cycles_stop[i] - post_cycles_start[i]; 1296 sum_poll += poll_cycles_stop[i] - poll_cycles_start[i]; 1297 sum_last_poll += poll_cycles_stop[i]-last_poll_cycles_start[i]; 1298 } 1299 PRINTF(cb, 1300 "delta sec %lu delta usec %lu iter %d size %d cycle_iters %d" 1301 " sum_post %llu sum_poll %llu sum_last_poll %llu\n", 1302 stop_tv.tv_sec - start_tv.tv_sec, 1303 stop_tv.tv_usec - start_tv.tv_usec, 1304 scnt, cb->size, cycle_iters, 1305 (unsigned long long)sum_post, (unsigned long long)sum_poll, 1306 (unsigned long long)sum_last_poll); 1307 kfree(post_cycles_start); 1308 kfree(post_cycles_stop); 1309 kfree(poll_cycles_start); 1310 kfree(poll_cycles_stop); 1311 kfree(last_poll_cycles_start); 1312} 1313 1314static void bw_test(struct krping_cb *cb) 1315{ 1316 int ccnt, scnt, rcnt; 1317 int iters=cb->count; 1318 struct timeval start_tv, stop_tv; 1319 cycles_t *post_cycles_start, *post_cycles_stop; 1320 cycles_t *poll_cycles_start, *poll_cycles_stop; 1321 cycles_t *last_poll_cycles_start; 1322 cycles_t sum_poll = 0, sum_post = 0, sum_last_poll = 0; 1323 int i; 1324 int cycle_iters = 1000; 1325 1326 ccnt = 0; 1327 scnt = 0; 1328 rcnt = 0; 1329 1330 post_cycles_start = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL); 1331 if (!post_cycles_start) { 1332 PRINTF(cb, "%s kmalloc failed\n", __FUNCTION__); 1333 return; 1334 } 1335 post_cycles_stop = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL); 1336 if (!post_cycles_stop) { 1337 PRINTF(cb, "%s kmalloc failed\n", __FUNCTION__); 1338 return; 1339 } 1340 poll_cycles_start = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL); 1341 if (!poll_cycles_start) { 1342 PRINTF(cb, "%s kmalloc failed\n", __FUNCTION__); 1343 return; 1344 } 1345 poll_cycles_stop = kmalloc(cycle_iters * sizeof(cycles_t), GFP_KERNEL); 1346 if (!poll_cycles_stop) { 1347 PRINTF(cb, "%s kmalloc failed\n", __FUNCTION__); 1348 return; 1349 } 1350 last_poll_cycles_start = kmalloc(cycle_iters * sizeof(cycles_t), 1351 GFP_KERNEL); 1352 if (!last_poll_cycles_start) { 1353 PRINTF(cb, "%s kmalloc failed\n", __FUNCTION__); 1354 return; 1355 } 1356 cb->rdma_sq_wr.opcode = IB_WR_RDMA_WRITE; 1357 cb->rdma_sq_wr.wr.rdma.rkey = cb->remote_rkey; 1358 cb->rdma_sq_wr.wr.rdma.remote_addr = cb->remote_addr; 1359 cb->rdma_sq_wr.sg_list->length = cb->size; 1360 1361 if (cycle_iters > iters) 1362 cycle_iters = iters; 1363 microtime(&start_tv); 1364 while (scnt < iters || ccnt < iters) { 1365 1366 while (scnt < iters && scnt - ccnt < cb->txdepth) { 1367 struct ib_send_wr *bad_wr; 1368 1369 if (scnt < cycle_iters) 1370 post_cycles_start[scnt] = get_cycles(); 1371 if (ib_post_send(cb->qp, &cb->rdma_sq_wr, &bad_wr)) { 1372 PRINTF(cb, 1373 "Couldn't post send: scnt=%d\n", 1374 scnt); 1375 return; 1376 } 1377 if (scnt < cycle_iters) 1378 post_cycles_stop[scnt] = get_cycles(); 1379 ++scnt; 1380 } 1381 1382 if (ccnt < iters) { 1383 int ne; 1384 struct ib_wc wc; 1385 1386 if (ccnt < cycle_iters) 1387 poll_cycles_start[ccnt] = get_cycles(); 1388 do { 1389 if (ccnt < cycle_iters) 1390 last_poll_cycles_start[ccnt] = 1391 get_cycles(); 1392 ne = ib_poll_cq(cb->cq, 1, &wc); 1393 } while (ne == 0); 1394 if (ccnt < cycle_iters) 1395 poll_cycles_stop[ccnt] = get_cycles(); 1396 ccnt += 1; 1397 1398 if (ne < 0) { 1399 PRINTF(cb, "poll CQ failed %d\n", ne); 1400 return; 1401 } 1402 if (wc.status != IB_WC_SUCCESS) { 1403 PRINTF(cb, 1404 "Completion wth error at %s:\n", 1405 cb->server ? "server" : "client"); 1406 PRINTF(cb, 1407 "Failed status %d: wr_id %d\n", 1408 wc.status, (int) wc.wr_id); 1409 return; 1410 } 1411 } 1412 } 1413 microtime(&stop_tv); 1414 1415 if (stop_tv.tv_usec < start_tv.tv_usec) { 1416 stop_tv.tv_usec += 1000000; 1417 stop_tv.tv_sec -= 1; 1418 } 1419 1420 for (i=0; i < cycle_iters; i++) { 1421 sum_post += post_cycles_stop[i] - post_cycles_start[i]; 1422 sum_poll += poll_cycles_stop[i] - poll_cycles_start[i]; 1423 sum_last_poll += poll_cycles_stop[i]-last_poll_cycles_start[i]; 1424 } 1425 PRINTF(cb, 1426 "delta sec %lu delta usec %lu iter %d size %d cycle_iters %d" 1427 " sum_post %llu sum_poll %llu sum_last_poll %llu\n", 1428 stop_tv.tv_sec - start_tv.tv_sec, 1429 stop_tv.tv_usec - start_tv.tv_usec, 1430 scnt, cb->size, cycle_iters, 1431 (unsigned long long)sum_post, (unsigned long long)sum_poll, 1432 (unsigned long long)sum_last_poll); 1433 kfree(post_cycles_start); 1434 kfree(post_cycles_stop); 1435 kfree(poll_cycles_start); 1436 kfree(poll_cycles_stop); 1437 kfree(last_poll_cycles_start); 1438} 1439 1440static void krping_rlat_test_server(struct krping_cb *cb) 1441{ 1442 struct ib_send_wr *bad_wr; 1443 struct ib_wc wc; 1444 int ret; 1445 1446 /* Spin waiting for client's Start STAG/TO/Len */ 1447 while (cb->state < RDMA_READ_ADV) { 1448 krping_cq_event_handler(cb->cq, cb); 1449 } 1450 1451 /* Send STAG/TO/Len to client */ 1452 krping_format_send(cb, cb->start_dma_addr); 1453 ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr); 1454 if (ret) { 1455 PRINTF(cb, "post send error %d\n", ret); 1456 return; 1457 } 1458 1459 /* Spin waiting for send completion */ 1460 while ((ret = ib_poll_cq(cb->cq, 1, &wc) == 0)); 1461 if (ret < 0) { 1462 PRINTF(cb, "poll error %d\n", ret); 1463 return; 1464 } 1465 if (wc.status) { 1466 PRINTF(cb, "send completiong error %d\n", wc.status); 1467 return; 1468 } 1469 1470 wait_event_interruptible(cb->sem, cb->state == ERROR); 1471} 1472 1473static void krping_wlat_test_server(struct krping_cb *cb) 1474{ 1475 struct ib_send_wr *bad_wr; 1476 struct ib_wc wc; 1477 int ret; 1478 1479 /* Spin waiting for client's Start STAG/TO/Len */ 1480 while (cb->state < RDMA_READ_ADV) { 1481 krping_cq_event_handler(cb->cq, cb); 1482 } 1483 1484 /* Send STAG/TO/Len to client */ 1485 krping_format_send(cb, cb->start_dma_addr); 1486 ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr); 1487 if (ret) { 1488 PRINTF(cb, "post send error %d\n", ret); 1489 return; 1490 } 1491 1492 /* Spin waiting for send completion */ 1493 while ((ret = ib_poll_cq(cb->cq, 1, &wc) == 0)); 1494 if (ret < 0) { 1495 PRINTF(cb, "poll error %d\n", ret); 1496 return; 1497 } 1498 if (wc.status) { 1499 PRINTF(cb, "send completiong error %d\n", wc.status); 1500 return; 1501 } 1502 1503 wlat_test(cb); 1504 wait_event_interruptible(cb->sem, cb->state == ERROR); 1505} 1506 1507static void krping_bw_test_server(struct krping_cb *cb) 1508{ 1509 struct ib_send_wr *bad_wr; 1510 struct ib_wc wc; 1511 int ret; 1512 1513 /* Spin waiting for client's Start STAG/TO/Len */ 1514 while (cb->state < RDMA_READ_ADV) { 1515 krping_cq_event_handler(cb->cq, cb); 1516 } 1517 1518 /* Send STAG/TO/Len to client */ 1519 krping_format_send(cb, cb->start_dma_addr); 1520 ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr); 1521 if (ret) { 1522 PRINTF(cb, "post send error %d\n", ret); 1523 return; 1524 } 1525 1526 /* Spin waiting for send completion */ 1527 while ((ret = ib_poll_cq(cb->cq, 1, &wc) == 0)); 1528 if (ret < 0) { 1529 PRINTF(cb, "poll error %d\n", ret); 1530 return; 1531 } 1532 if (wc.status) { 1533 PRINTF(cb, "send completiong error %d\n", wc.status); 1534 return; 1535 } 1536 1537 if (cb->duplex) 1538 bw_test(cb); 1539 wait_event_interruptible(cb->sem, cb->state == ERROR); 1540} 1541 1542static int fastreg_supported(struct krping_cb *cb) 1543{ 1544 struct ib_device *dev = cb->child_cm_id->device; 1545 struct ib_device_attr attr; 1546 int ret; 1547 1548 ret = ib_query_device(dev, &attr); 1549 if (ret) { 1550 PRINTF(cb, "ib_query_device failed ret %d\n", ret); 1551 return 0; 1552 } 1553 if (!(attr.device_cap_flags & IB_DEVICE_MEM_MGT_EXTENSIONS)) { 1554 PRINTF(cb, "Fastreg not supported - device_cap_flags 0x%x\n", 1555 attr.device_cap_flags); 1556 return 0; 1557 } 1558 DEBUG_LOG(cb, "Fastreg supported - device_cap_flags 0x%x\n", 1559 attr.device_cap_flags); 1560 return 1; 1561} 1562 1563static int krping_bind_server(struct krping_cb *cb) 1564{ 1565 struct sockaddr_in sin; 1566 int ret; 1567 1568 memset(&sin, 0, sizeof(sin)); 1569 sin.sin_len = sizeof sin; 1570 sin.sin_family = AF_INET; 1571 sin.sin_addr.s_addr = cb->addr.s_addr; 1572 sin.sin_port = cb->port; 1573 1574 ret = rdma_bind_addr(cb->cm_id, (struct sockaddr *) &sin); 1575 if (ret) { 1576 PRINTF(cb, "rdma_bind_addr error %d\n", ret); 1577 return ret; 1578 } 1579 DEBUG_LOG(cb, "rdma_bind_addr successful\n"); 1580 1581 DEBUG_LOG(cb, "rdma_listen\n"); 1582 ret = rdma_listen(cb->cm_id, 3); 1583 if (ret) { 1584 PRINTF(cb, "rdma_listen failed: %d\n", ret); 1585 return ret; 1586 } 1587 1588 wait_event_interruptible(cb->sem, cb->state >= CONNECT_REQUEST); 1589 if (cb->state != CONNECT_REQUEST) { 1590 PRINTF(cb, "wait for CONNECT_REQUEST state %d\n", 1591 cb->state); 1592 return -1; 1593 } 1594 1595 if (cb->mem == FASTREG && !fastreg_supported(cb)) 1596 return -EINVAL; 1597 1598 return 0; 1599} 1600 1601static void krping_run_server(struct krping_cb *cb) 1602{ 1603 struct ib_recv_wr *bad_wr; 1604 int ret; 1605 1606 ret = krping_bind_server(cb); 1607 if (ret) 1608 return; 1609 1610 ret = krping_setup_qp(cb, cb->child_cm_id); 1611 if (ret) { 1612 PRINTF(cb, "setup_qp failed: %d\n", ret); 1613 goto err0; 1614 } 1615 1616 ret = krping_setup_buffers(cb); 1617 if (ret) { 1618 PRINTF(cb, "krping_setup_buffers failed: %d\n", ret); 1619 goto err1; 1620 } 1621 1622 ret = ib_post_recv(cb->qp, &cb->rq_wr, &bad_wr); 1623 if (ret) { 1624 PRINTF(cb, "ib_post_recv failed: %d\n", ret); 1625 goto err2; 1626 } 1627 1628 ret = krping_accept(cb); 1629 if (ret) { 1630 PRINTF(cb, "connect error %d\n", ret); 1631 goto err2; 1632 } 1633 1634 if (cb->wlat) 1635 krping_wlat_test_server(cb); 1636 else if (cb->rlat) 1637 krping_rlat_test_server(cb); 1638 else if (cb->bw) 1639 krping_bw_test_server(cb); 1640 else 1641 krping_test_server(cb); 1642 rdma_disconnect(cb->child_cm_id); 1643err2: 1644 krping_free_buffers(cb); 1645err1: 1646 krping_free_qp(cb); 1647err0: 1648 rdma_destroy_id(cb->child_cm_id); 1649} 1650 1651static void krping_test_client(struct krping_cb *cb) 1652{ 1653 int ping, start, cc, i, ret; 1654 struct ib_send_wr *bad_wr; 1655 unsigned char c; 1656 1657 start = 65; 1658 for (ping = 0; !cb->count || ping < cb->count; ping++) { 1659 cb->state = RDMA_READ_ADV; 1660 1661 /* Put some ascii text in the buffer. */ 1662 cc = sprintf(cb->start_buf, "rdma-ping-%d: ", ping); 1663 for (i = cc, c = start; i < cb->size; i++) { 1664 cb->start_buf[i] = c; 1665 c++; 1666 if (c > 122) 1667 c = 65; 1668 } 1669 start++; 1670 if (start > 122) 1671 start = 65; 1672 cb->start_buf[cb->size - 1] = 0; 1673 1674 krping_format_send(cb, cb->start_dma_addr); 1675 if (cb->state == ERROR) { 1676 PRINTF(cb, "krping_format_send failed\n"); 1677 break; 1678 } 1679 ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr); 1680 if (ret) { 1681 PRINTF(cb, "post send error %d\n", ret); 1682 break; 1683 } 1684 1685 /* Wait for server to ACK */ 1686 wait_event_interruptible(cb->sem, cb->state >= RDMA_WRITE_ADV); 1687 if (cb->state != RDMA_WRITE_ADV) { 1688 PRINTF(cb, 1689 "wait for RDMA_WRITE_ADV state %d\n", 1690 cb->state); 1691 break; 1692 } 1693 1694 krping_format_send(cb, cb->rdma_dma_addr); 1695 ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr); 1696 if (ret) { 1697 PRINTF(cb, "post send error %d\n", ret); 1698 break; 1699 } 1700 1701 /* Wait for the server to say the RDMA Write is complete. */ 1702 wait_event_interruptible(cb->sem, 1703 cb->state >= RDMA_WRITE_COMPLETE); 1704 if (cb->state != RDMA_WRITE_COMPLETE) { 1705 PRINTF(cb, 1706 "wait for RDMA_WRITE_COMPLETE state %d\n", 1707 cb->state); 1708 break; 1709 } 1710 1711 if (cb->validate) 1712 if (memcmp(cb->start_buf, cb->rdma_buf, cb->size)) { 1713 PRINTF(cb, "data mismatch!\n"); 1714 break; 1715 } 1716 1717 if (cb->verbose) 1718 PRINTF(cb, "ping data: %s\n", cb->rdma_buf); 1719#ifdef SLOW_KRPING 1720 wait_event_interruptible_timeout(cb->sem, cb->state == ERROR, HZ); 1721#endif 1722 } 1723} 1724 1725static void krping_rlat_test_client(struct krping_cb *cb) 1726{ 1727 struct ib_send_wr *bad_wr; 1728 struct ib_wc wc; 1729 int ret; 1730 1731 cb->state = RDMA_READ_ADV; 1732 1733 /* Send STAG/TO/Len to client */ 1734 krping_format_send(cb, cb->start_dma_addr); 1735 if (cb->state == ERROR) { 1736 PRINTF(cb, "krping_format_send failed\n"); 1737 return; 1738 } 1739 ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr); 1740 if (ret) { 1741 PRINTF(cb, "post send error %d\n", ret); 1742 return; 1743 } 1744 1745 /* Spin waiting for send completion */ 1746 while ((ret = ib_poll_cq(cb->cq, 1, &wc) == 0)); 1747 if (ret < 0) { 1748 PRINTF(cb, "poll error %d\n", ret); 1749 return; 1750 } 1751 if (wc.status) { 1752 PRINTF(cb, "send completion error %d\n", wc.status); 1753 return; 1754 } 1755 1756 /* Spin waiting for server's Start STAG/TO/Len */ 1757 while (cb->state < RDMA_WRITE_ADV) { 1758 krping_cq_event_handler(cb->cq, cb); 1759 } 1760 1761#if 0 1762{ 1763 int i; 1764 struct timeval start, stop; 1765 time_t sec; 1766 suseconds_t usec; 1767 unsigned long long elapsed; 1768 struct ib_wc wc; 1769 struct ib_send_wr *bad_wr; 1770 int ne; 1771 1772 cb->rdma_sq_wr.opcode = IB_WR_RDMA_WRITE; 1773 cb->rdma_sq_wr.wr.rdma.rkey = cb->remote_rkey; 1774 cb->rdma_sq_wr.wr.rdma.remote_addr = cb->remote_addr; 1775 cb->rdma_sq_wr.sg_list->length = 0; 1776 cb->rdma_sq_wr.num_sge = 0; 1777 1778 microtime(&start); 1779 for (i=0; i < 100000; i++) { 1780 if (ib_post_send(cb->qp, &cb->rdma_sq_wr, &bad_wr)) { 1781 PRINTF(cb, "Couldn't post send\n"); 1782 return; 1783 } 1784 do { 1785 ne = ib_poll_cq(cb->cq, 1, &wc); 1786 } while (ne == 0); 1787 if (ne < 0) { 1788 PRINTF(cb, "poll CQ failed %d\n", ne); 1789 return; 1790 } 1791 if (wc.status != IB_WC_SUCCESS) { 1792 PRINTF(cb, "Completion wth error at %s:\n", 1793 cb->server ? "server" : "client"); 1794 PRINTF(cb, "Failed status %d: wr_id %d\n", 1795 wc.status, (int) wc.wr_id); 1796 return; 1797 } 1798 } 1799 microtime(&stop); 1800 1801 if (stop.tv_usec < start.tv_usec) { 1802 stop.tv_usec += 1000000; 1803 stop.tv_sec -= 1; 1804 } 1805 sec = stop.tv_sec - start.tv_sec; 1806 usec = stop.tv_usec - start.tv_usec; 1807 elapsed = sec * 1000000 + usec; 1808 PRINTF(cb, "0B-write-lat iters 100000 usec %llu\n", elapsed); 1809} 1810#endif 1811 1812 rlat_test(cb); 1813} 1814 1815static void krping_wlat_test_client(struct krping_cb *cb) 1816{ 1817 struct ib_send_wr *bad_wr; 1818 struct ib_wc wc; 1819 int ret; 1820 1821 cb->state = RDMA_READ_ADV; 1822 1823 /* Send STAG/TO/Len to client */ 1824 krping_format_send(cb, cb->start_dma_addr); 1825 if (cb->state == ERROR) { 1826 PRINTF(cb, "krping_format_send failed\n"); 1827 return; 1828 } 1829 ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr); 1830 if (ret) { 1831 PRINTF(cb, "post send error %d\n", ret); 1832 return; 1833 } 1834 1835 /* Spin waiting for send completion */ 1836 while ((ret = ib_poll_cq(cb->cq, 1, &wc) == 0)); 1837 if (ret < 0) { 1838 PRINTF(cb, "poll error %d\n", ret); 1839 return; 1840 } 1841 if (wc.status) { 1842 PRINTF(cb, "send completion error %d\n", wc.status); 1843 return; 1844 } 1845 1846 /* Spin waiting for server's Start STAG/TO/Len */ 1847 while (cb->state < RDMA_WRITE_ADV) { 1848 krping_cq_event_handler(cb->cq, cb); 1849 } 1850 1851 wlat_test(cb); 1852} 1853 1854static void krping_bw_test_client(struct krping_cb *cb) 1855{ 1856 struct ib_send_wr *bad_wr; 1857 struct ib_wc wc; 1858 int ret; 1859 1860 cb->state = RDMA_READ_ADV; 1861 1862 /* Send STAG/TO/Len to client */ 1863 krping_format_send(cb, cb->start_dma_addr); 1864 if (cb->state == ERROR) { 1865 PRINTF(cb, "krping_format_send failed\n"); 1866 return; 1867 } 1868 ret = ib_post_send(cb->qp, &cb->sq_wr, &bad_wr); 1869 if (ret) { 1870 PRINTF(cb, "post send error %d\n", ret); 1871 return; 1872 } 1873 1874 /* Spin waiting for send completion */ 1875 while ((ret = ib_poll_cq(cb->cq, 1, &wc) == 0)); 1876 if (ret < 0) { 1877 PRINTF(cb, "poll error %d\n", ret); 1878 return; 1879 } 1880 if (wc.status) { 1881 PRINTF(cb, "send completion error %d\n", wc.status); 1882 return; 1883 } 1884 1885 /* Spin waiting for server's Start STAG/TO/Len */ 1886 while (cb->state < RDMA_WRITE_ADV) { 1887 krping_cq_event_handler(cb->cq, cb); 1888 } 1889 1890 bw_test(cb); 1891} 1892 1893static void krping_fr_test(struct krping_cb *cb) 1894{ 1895 struct ib_fast_reg_page_list *pl; 1896 struct ib_send_wr fr, inv, *bad; 1897 struct ib_wc wc; 1898 u8 key = 0; 1899 struct ib_mr *mr; 1900 int i; 1901 int ret; 1902 int size = cb->size; 1903 int plen = (((size - 1) & PAGE_MASK) + PAGE_SIZE) >> PAGE_SHIFT; 1904 time_t start; 1905 int count = 0; 1906 int scnt = 0; 1907 1908 pl = ib_alloc_fast_reg_page_list(cb->qp->device, plen); 1909 if (IS_ERR(pl)) { 1910 PRINTF(cb, "ib_alloc_fast_reg_page_list failed %ld\n", PTR_ERR(pl)); 1911 return; 1912 } 1913 1914 mr = ib_alloc_fast_reg_mr(cb->pd, plen); 1915 if (IS_ERR(mr)) { 1916 PRINTF(cb, "ib_alloc_fast_reg_mr failed %ld\n", PTR_ERR(pl)); 1917 goto err1; 1918 } 1919 1920 for (i=0; i<plen; i++) 1921 pl->page_list[i] = 0xcafebabe | i; 1922 1923 memset(&fr, 0, sizeof fr); 1924 fr.opcode = IB_WR_FAST_REG_MR; 1925 fr.wr.fast_reg.page_shift = PAGE_SHIFT; 1926 fr.wr.fast_reg.length = size; 1927 fr.wr.fast_reg.page_list = pl; 1928 fr.wr.fast_reg.page_list_len = plen; 1929 fr.wr.fast_reg.iova_start = 0; 1930 fr.wr.fast_reg.access_flags = IB_ACCESS_REMOTE_WRITE | IB_ACCESS_LOCAL_WRITE; 1931 fr.next = &inv; 1932 memset(&inv, 0, sizeof inv); 1933 inv.opcode = IB_WR_LOCAL_INV; 1934 inv.send_flags = IB_SEND_SIGNALED; 1935 1936 DEBUG_LOG(cb, "fr_test: stag index 0x%x plen %u size %u depth %u\n", mr->rkey >> 8, plen, cb->size, cb->txdepth); 1937 start = time_uptime; 1938 while (1) { 1939 if ((time_uptime - start) >= 9) { 1940 DEBUG_LOG(cb, "fr_test: pausing 1 second! count %u latest size %u plen %u\n", count, size, plen); 1941 wait_event_interruptible(cb->sem, cb->state == ERROR); 1942 if (cb->state == ERROR) 1943 break; 1944 start = time_uptime; 1945 } 1946 while (scnt < (cb->txdepth>>1)) { 1947 ib_update_fast_reg_key(mr, ++key); 1948 fr.wr.fast_reg.rkey = mr->rkey; 1949 inv.ex.invalidate_rkey = mr->rkey; 1950 size = arc4random() % cb->size; 1951 if (size == 0) 1952 size = cb->size; 1953 plen = (((size - 1) & PAGE_MASK) + PAGE_SIZE) >> PAGE_SHIFT; 1954 fr.wr.fast_reg.length = size; 1955 fr.wr.fast_reg.page_list_len = plen; 1956 ret = ib_post_send(cb->qp, &fr, &bad); 1957 if (ret) { 1958 PRINTF(cb, "ib_post_send failed %d\n", ret); 1959 goto err2; 1960 } 1961 scnt++; 1962 } 1963 1964 do { 1965 ret = ib_poll_cq(cb->cq, 1, &wc); 1966 if (ret < 0) { 1967 PRINTF(cb, "ib_poll_cq failed %d\n", ret); 1968 goto err2; 1969 } 1970 if (ret == 1) { 1971 if (wc.status) { 1972 PRINTF(cb, "completion error %u\n", wc.status); 1973 goto err2; 1974 } 1975 count++; 1976 scnt--; 1977 } 1978 else if (krping_sigpending()) { 1979 PRINTF(cb, "signal!\n"); 1980 goto err2; 1981 } 1982 } while (ret == 1); 1983 } 1984err2: 1985#if 0 1986 DEBUG_LOG(cb, "sleeping 1 second\n"); 1987 wait_event_interruptible_timeout(cb->sem, cb->state == ERROR, HZ); 1988#endif 1989 DEBUG_LOG(cb, "draining the cq...\n"); 1990 do { 1991 ret = ib_poll_cq(cb->cq, 1, &wc); 1992 if (ret < 0) { 1993 PRINTF(cb, "ib_poll_cq failed %d\n", ret); 1994 break; 1995 } 1996 if (ret == 1) { 1997 if (wc.status) { 1998 PRINTF(cb, "completion error %u opcode %u\n", wc.status, wc.opcode); 1999 } 2000 } 2001 } while (ret == 1); 2002 DEBUG_LOG(cb, "fr_test: done!\n"); 2003 ib_dereg_mr(mr); 2004err1: 2005 ib_free_fast_reg_page_list(pl); 2006} 2007 2008static int krping_connect_client(struct krping_cb *cb) 2009{ 2010 struct rdma_conn_param conn_param; 2011 int ret; 2012 2013 memset(&conn_param, 0, sizeof conn_param); 2014 conn_param.responder_resources = 1; 2015 conn_param.initiator_depth = 1; 2016 conn_param.retry_count = 10; 2017 2018 ret = rdma_connect(cb->cm_id, &conn_param); 2019 if (ret) { 2020 PRINTF(cb, "rdma_connect error %d\n", ret); 2021 return ret; 2022 } 2023 2024 wait_event_interruptible(cb->sem, cb->state >= CONNECTED); 2025 if (cb->state == ERROR) { 2026 PRINTF(cb, "wait for CONNECTED state %d\n", cb->state); 2027 return -1; 2028 } 2029 2030 DEBUG_LOG(cb, "rdma_connect successful\n"); 2031 return 0; 2032} 2033 2034static int krping_bind_client(struct krping_cb *cb) 2035{ 2036 struct sockaddr_in sin; 2037 int ret; 2038 2039 memset(&sin, 0, sizeof(sin)); 2040 sin.sin_len = sizeof sin; 2041 sin.sin_family = AF_INET; 2042 sin.sin_addr.s_addr = cb->addr.s_addr; 2043 sin.sin_port = cb->port; 2044 2045 ret = rdma_resolve_addr(cb->cm_id, NULL, (struct sockaddr *) &sin, 2046 2000); 2047 if (ret) { 2048 PRINTF(cb, "rdma_resolve_addr error %d\n", ret); 2049 return ret; 2050 } 2051 2052 wait_event_interruptible(cb->sem, cb->state >= ROUTE_RESOLVED); 2053 if (cb->state != ROUTE_RESOLVED) { 2054 PRINTF(cb, 2055 "addr/route resolution did not resolve: state %d\n", 2056 cb->state); 2057 return -EINTR; 2058 } 2059 2060 if (cb->mem == FASTREG && !fastreg_supported(cb)) 2061 return -EINVAL; 2062 2063 DEBUG_LOG(cb, "rdma_resolve_addr - rdma_resolve_route successful\n"); 2064 return 0; 2065} 2066 2067static void krping_run_client(struct krping_cb *cb) 2068{ 2069 struct ib_recv_wr *bad_wr; 2070 int ret; 2071 2072 ret = krping_bind_client(cb); 2073 if (ret) 2074 return; 2075 2076 ret = krping_setup_qp(cb, cb->cm_id); 2077 if (ret) { 2078 PRINTF(cb, "setup_qp failed: %d\n", ret); 2079 return; 2080 } 2081 2082 ret = krping_setup_buffers(cb); 2083 if (ret) { 2084 PRINTF(cb, "krping_setup_buffers failed: %d\n", ret); 2085 goto err1; 2086 } 2087 2088 ret = ib_post_recv(cb->qp, &cb->rq_wr, &bad_wr); 2089 if (ret) { 2090 PRINTF(cb, "ib_post_recv failed: %d\n", ret); 2091 goto err2; 2092 } 2093 2094 ret = krping_connect_client(cb); 2095 if (ret) { 2096 PRINTF(cb, "connect error %d\n", ret); 2097 goto err2; 2098 } 2099 2100 if (cb->wlat) 2101 krping_wlat_test_client(cb); 2102 else if (cb->rlat) 2103 krping_rlat_test_client(cb); 2104 else if (cb->bw) 2105 krping_bw_test_client(cb); 2106 else if (cb->frtest) 2107 krping_fr_test(cb); 2108 else 2109 krping_test_client(cb); 2110 rdma_disconnect(cb->cm_id); 2111err2: 2112 krping_free_buffers(cb); 2113err1: 2114 krping_free_qp(cb); 2115} 2116 2117int krping_doit(char *cmd, void *cookie) 2118{ 2119 struct krping_cb *cb; 2120 int op; 2121 int ret = 0; 2122 char *optarg; 2123 unsigned long optint; 2124 2125 cb = kzalloc(sizeof(*cb), GFP_KERNEL); 2126 if (!cb) 2127 return -ENOMEM; 2128 2129 mutex_lock(&krping_mutex); 2130 list_add_tail(&cb->list, &krping_cbs); 2131 mutex_unlock(&krping_mutex); 2132 2133 cb->cookie = cookie; 2134 cb->server = -1; 2135 cb->state = IDLE; 2136 cb->size = 64; 2137 cb->txdepth = RPING_SQ_DEPTH; 2138 cb->mem = DMA; 2139 init_waitqueue_head(&cb->sem); 2140 2141 while ((op = krping_getopt("krping", &cmd, krping_opts, NULL, &optarg, 2142 &optint)) != 0) { 2143 switch (op) { 2144 case 'a': 2145 cb->addr_str = optarg; 2146 DEBUG_LOG(cb, "ipaddr (%s)\n", optarg); 2147 if (!inet_aton(optarg, &cb->addr)) { 2148 PRINTF(cb, "bad addr string %s\n", 2149 optarg); 2150 ret = EINVAL; 2151 } 2152 break; 2153 case 'p': 2154 cb->port = htons(optint); 2155 DEBUG_LOG(cb, "port %d\n", (int)optint); 2156 break; 2157 case 'P': 2158 cb->poll = 1; 2159 DEBUG_LOG(cb, "server\n"); 2160 break; 2161 case 's': 2162 cb->server = 1; 2163 DEBUG_LOG(cb, "server\n"); 2164 break; 2165 case 'c': 2166 cb->server = 0; 2167 DEBUG_LOG(cb, "client\n"); 2168 break; 2169 case 'S': 2170 cb->size = optint; 2171 if ((cb->size < 1) || 2172 (cb->size > RPING_BUFSIZE)) { 2173 PRINTF(cb, "Invalid size %d " 2174 "(valid range is 1 to %d)\n", 2175 cb->size, RPING_BUFSIZE); 2176 ret = EINVAL; 2177 } else 2178 DEBUG_LOG(cb, "size %d\n", (int)optint); 2179 break; 2180 case 'C': 2181 cb->count = optint; 2182 if (cb->count < 0) { 2183 PRINTF(cb, "Invalid count %d\n", 2184 cb->count); 2185 ret = EINVAL; 2186 } else 2187 DEBUG_LOG(cb, "count %d\n", (int) cb->count); 2188 break; 2189 case 'v': 2190 cb->verbose++; 2191 DEBUG_LOG(cb, "verbose\n"); 2192 break; 2193 case 'V': 2194 cb->validate++; 2195 DEBUG_LOG(cb, "validate data\n"); 2196 break; 2197 case 'l': 2198 cb->wlat++; 2199 break; 2200 case 'L': 2201 cb->rlat++; 2202 break; 2203 case 'B': 2204 cb->bw++; 2205 break; 2206 case 'd': 2207 cb->duplex++; 2208 break; 2209 case 'm': 2210 if (!strncmp(optarg, "dma", 3)) 2211 cb->mem = DMA; 2212 else if (!strncmp(optarg, "fastreg", 7)) 2213 cb->mem = FASTREG; 2214 else if (!strncmp(optarg, "mw", 2)) 2215 cb->mem = MW; 2216 else if (!strncmp(optarg, "mr", 2)) 2217 cb->mem = MR; 2218 else { 2219 PRINTF(cb, "unknown mem mode %s. " 2220 "Must be dma, fastreg, mw, or mr\n", 2221 optarg); 2222 ret = -EINVAL; 2223 break; 2224 } 2225 break; 2226 case 'I': 2227 cb->server_invalidate = 1; 2228 break; 2229 case 'T': 2230 cb->txdepth = optint; 2231 DEBUG_LOG(cb, "txdepth %d\n", (int) cb->txdepth); 2232 break; 2233 case 'Z': 2234 cb->local_dma_lkey = 1; 2235 DEBUG_LOG(cb, "using local dma lkey\n"); 2236 break; 2237 case 'R': 2238 cb->read_inv = 1; 2239 DEBUG_LOG(cb, "using read-with-inv\n"); 2240 break; 2241 case 'f': 2242 cb->frtest = 1; 2243 DEBUG_LOG(cb, "fast-reg test!\n"); 2244 break; 2245 default: 2246 PRINTF(cb, "unknown opt %s\n", optarg); 2247 ret = -EINVAL; 2248 break; 2249 } 2250 } 2251 if (ret) 2252 goto out; 2253 2254 if (cb->server == -1) { 2255 PRINTF(cb, "must be either client or server\n"); 2256 ret = -EINVAL; 2257 goto out; 2258 } 2259 2260 if (cb->server && cb->frtest) { 2261 PRINTF(cb, "must be client to run frtest\n"); 2262 ret = -EINVAL; 2263 goto out; 2264 } 2265 2266 if ((cb->frtest + cb->bw + cb->rlat + cb->wlat) > 1) { 2267 PRINTF(cb, "Pick only one test: fr, bw, rlat, wlat\n"); 2268 ret = -EINVAL; 2269 goto out; 2270 } 2271 2272 if (cb->server_invalidate && cb->mem != FASTREG) { 2273 PRINTF(cb, "server_invalidate only valid with fastreg mem_mode\n"); 2274 ret = -EINVAL; 2275 goto out; 2276 } 2277 2278 if (cb->read_inv && cb->mem != FASTREG) { 2279 PRINTF(cb, "read_inv only valid with fastreg mem_mode\n"); 2280 ret = -EINVAL; 2281 goto out; 2282 } 2283 2284 if (cb->mem != MR && (cb->wlat || cb->rlat || cb->bw)) { 2285 PRINTF(cb, "wlat, rlat, and bw tests only support mem_mode MR\n"); 2286 ret = -EINVAL; 2287 goto out; 2288 } 2289 2290 cb->cm_id = rdma_create_id(krping_cma_event_handler, cb, RDMA_PS_TCP); 2291 if (IS_ERR(cb->cm_id)) { 2292 ret = PTR_ERR(cb->cm_id); 2293 PRINTF(cb, "rdma_create_id error %d\n", ret); 2294 goto out; 2295 } 2296 DEBUG_LOG(cb, "created cm_id %p\n", cb->cm_id); 2297 2298 if (cb->server) 2299 krping_run_server(cb); 2300 else 2301 krping_run_client(cb); 2302 2303 DEBUG_LOG(cb, "destroy cm_id %p\n", cb->cm_id); 2304 rdma_destroy_id(cb->cm_id); 2305out: 2306 mutex_lock(&krping_mutex); 2307 list_del(&cb->list); 2308 mutex_unlock(&krping_mutex); 2309 kfree(cb); 2310 return ret; 2311} 2312 2313void 2314krping_walk_cb_list(void (*f)(struct krping_stats *, void *), void *arg) 2315{ 2316 struct krping_cb *cb; 2317 2318 mutex_lock(&krping_mutex); 2319 list_for_each_entry(cb, &krping_cbs, list) 2320 (*f)(cb->pd ? &cb->stats : NULL, arg); 2321 mutex_unlock(&krping_mutex); 2322} 2323 2324void krping_init(void) 2325{ 2326 2327 mutex_init(&krping_mutex); 2328} 2329