1 /* 2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved. 3 * 4 * This software is available to you under a choice of one of two 5 * licenses. You may choose to be licensed under the terms of the GNU 6 * General Public License (GPL) Version 2, available from the file 7 * COPYING in the main directory of this source tree, or the 8 * OpenIB.org BSD license below: 9 * 10 * Redistribution and use in source and binary forms, with or 11 * without modification, are permitted provided that the following 12 * conditions are met: 13 * 14 * - Redistributions of source code must retain the above 15 * copyright notice, this list of conditions and the following 16 * disclaimer. 17 * 18 * - Redistributions in binary form must reproduce the above 19 * copyright notice, this list of conditions and the following 20 * disclaimer in the documentation and/or other materials 21 * provided with the distribution. 22 * 23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30 * SOFTWARE. 31 */ 32 #include <linux/module.h> 33 #include <linux/moduleparam.h> 34 #include <linux/debugfs.h> 35 #include <linux/vmalloc.h> 36 #include <linux/math64.h> 37 38 #include <rdma/ib_verbs.h> 39 40 #include "iw_cxgb4.h" 41 42 #define DRV_VERSION "0.1" 43 44 MODULE_AUTHOR("Steve Wise"); 45 MODULE_DESCRIPTION("Chelsio T4/T5 RDMA Driver"); 46 MODULE_LICENSE("Dual BSD/GPL"); 47 48 static int allow_db_fc_on_t5; 49 module_param(allow_db_fc_on_t5, int, 0644); 50 MODULE_PARM_DESC(allow_db_fc_on_t5, 51 "Allow DB Flow Control on T5 (default = 0)"); 52 53 static int allow_db_coalescing_on_t5; 54 module_param(allow_db_coalescing_on_t5, int, 0644); 55 MODULE_PARM_DESC(allow_db_coalescing_on_t5, 56 "Allow DB Coalescing on T5 (default = 0)"); 57 58 int c4iw_wr_log = 0; 59 module_param(c4iw_wr_log, int, 0444); 60 MODULE_PARM_DESC(c4iw_wr_log, "Enables logging of work request timing data."); 61 62 static int c4iw_wr_log_size_order = 12; 63 module_param(c4iw_wr_log_size_order, int, 0444); 64 MODULE_PARM_DESC(c4iw_wr_log_size_order, 65 "Number of entries (log2) in the work request timing log."); 66 67 static LIST_HEAD(uld_ctx_list); 68 static DEFINE_MUTEX(dev_mutex); 69 static struct workqueue_struct *reg_workq; 70 71 #define DB_FC_RESUME_SIZE 64 72 #define DB_FC_RESUME_DELAY 1 73 #define DB_FC_DRAIN_THRESH 0 74 75 static struct dentry *c4iw_debugfs_root; 76 77 struct c4iw_debugfs_data { 78 struct c4iw_dev *devp; 79 char *buf; 80 int bufsize; 81 int pos; 82 }; 83 84 static ssize_t debugfs_read(struct file *file, char __user *buf, size_t count, 85 loff_t *ppos) 86 { 87 struct c4iw_debugfs_data *d = file->private_data; 88 89 return simple_read_from_buffer(buf, count, ppos, d->buf, d->pos); 90 } 91 92 void c4iw_log_wr_stats(struct t4_wq *wq, struct t4_cqe *cqe) 93 { 94 struct wr_log_entry le; 95 int idx; 96 97 if (!wq->rdev->wr_log) 98 return; 99 100 idx = (atomic_inc_return(&wq->rdev->wr_log_idx) - 1) & 101 (wq->rdev->wr_log_size - 1); 102 le.poll_sge_ts = cxgb4_read_sge_timestamp(wq->rdev->lldi.ports[0]); 103 le.poll_host_time = ktime_get(); 104 le.valid = 1; 105 le.cqe_sge_ts = CQE_TS(cqe); 106 if (SQ_TYPE(cqe)) { 107 le.qid = wq->sq.qid; 108 le.opcode = CQE_OPCODE(cqe); 109 le.post_host_time = wq->sq.sw_sq[wq->sq.cidx].host_time; 110 le.post_sge_ts = wq->sq.sw_sq[wq->sq.cidx].sge_ts; 111 le.wr_id = CQE_WRID_SQ_IDX(cqe); 112 } else { 113 le.qid = wq->rq.qid; 114 le.opcode = FW_RI_RECEIVE; 115 le.post_host_time = wq->rq.sw_rq[wq->rq.cidx].host_time; 116 le.post_sge_ts = wq->rq.sw_rq[wq->rq.cidx].sge_ts; 117 le.wr_id = CQE_WRID_MSN(cqe); 118 } 119 wq->rdev->wr_log[idx] = le; 120 } 121 122 static int wr_log_show(struct seq_file *seq, void *v) 123 { 124 struct c4iw_dev *dev = seq->private; 125 ktime_t prev_time; 126 struct wr_log_entry *lep; 127 int prev_time_set = 0; 128 int idx, end; 129 130 #define ts2ns(ts) div64_u64((ts) * dev->rdev.lldi.cclk_ps, 1000) 131 132 idx = atomic_read(&dev->rdev.wr_log_idx) & 133 (dev->rdev.wr_log_size - 1); 134 end = idx - 1; 135 if (end < 0) 136 end = dev->rdev.wr_log_size - 1; 137 lep = &dev->rdev.wr_log[idx]; 138 while (idx != end) { 139 if (lep->valid) { 140 if (!prev_time_set) { 141 prev_time_set = 1; 142 prev_time = lep->poll_host_time; 143 } 144 seq_printf(seq, "%04u: nsec %llu qid %u opcode " 145 "%u %s 0x%x host_wr_delta nsec %llu " 146 "post_sge_ts 0x%llx cqe_sge_ts 0x%llx " 147 "poll_sge_ts 0x%llx post_poll_delta_ns %llu " 148 "cqe_poll_delta_ns %llu\n", 149 idx, 150 ktime_to_ns(ktime_sub(lep->poll_host_time, 151 prev_time)), 152 lep->qid, lep->opcode, 153 lep->opcode == FW_RI_RECEIVE ? 154 "msn" : "wrid", 155 lep->wr_id, 156 ktime_to_ns(ktime_sub(lep->poll_host_time, 157 lep->post_host_time)), 158 lep->post_sge_ts, lep->cqe_sge_ts, 159 lep->poll_sge_ts, 160 ts2ns(lep->poll_sge_ts - lep->post_sge_ts), 161 ts2ns(lep->poll_sge_ts - lep->cqe_sge_ts)); 162 prev_time = lep->poll_host_time; 163 } 164 idx++; 165 if (idx > (dev->rdev.wr_log_size - 1)) 166 idx = 0; 167 lep = &dev->rdev.wr_log[idx]; 168 } 169 #undef ts2ns 170 return 0; 171 } 172 173 static int wr_log_open(struct inode *inode, struct file *file) 174 { 175 return single_open(file, wr_log_show, inode->i_private); 176 } 177 178 static ssize_t wr_log_clear(struct file *file, const char __user *buf, 179 size_t count, loff_t *pos) 180 { 181 struct c4iw_dev *dev = ((struct seq_file *)file->private_data)->private; 182 int i; 183 184 if (dev->rdev.wr_log) 185 for (i = 0; i < dev->rdev.wr_log_size; i++) 186 dev->rdev.wr_log[i].valid = 0; 187 return count; 188 } 189 190 static const struct file_operations wr_log_debugfs_fops = { 191 .owner = THIS_MODULE, 192 .open = wr_log_open, 193 .release = single_release, 194 .read = seq_read, 195 .llseek = seq_lseek, 196 .write = wr_log_clear, 197 }; 198 199 static struct sockaddr_in zero_sin = { 200 .sin_family = AF_INET, 201 }; 202 203 static struct sockaddr_in6 zero_sin6 = { 204 .sin6_family = AF_INET6, 205 }; 206 207 static void set_ep_sin_addrs(struct c4iw_ep *ep, 208 struct sockaddr_in **lsin, 209 struct sockaddr_in **rsin, 210 struct sockaddr_in **m_lsin, 211 struct sockaddr_in **m_rsin) 212 { 213 struct iw_cm_id *id = ep->com.cm_id; 214 215 *m_lsin = (struct sockaddr_in *)&ep->com.local_addr; 216 *m_rsin = (struct sockaddr_in *)&ep->com.remote_addr; 217 if (id) { 218 *lsin = (struct sockaddr_in *)&id->local_addr; 219 *rsin = (struct sockaddr_in *)&id->remote_addr; 220 } else { 221 *lsin = &zero_sin; 222 *rsin = &zero_sin; 223 } 224 } 225 226 static void set_ep_sin6_addrs(struct c4iw_ep *ep, 227 struct sockaddr_in6 **lsin6, 228 struct sockaddr_in6 **rsin6, 229 struct sockaddr_in6 **m_lsin6, 230 struct sockaddr_in6 **m_rsin6) 231 { 232 struct iw_cm_id *id = ep->com.cm_id; 233 234 *m_lsin6 = (struct sockaddr_in6 *)&ep->com.local_addr; 235 *m_rsin6 = (struct sockaddr_in6 *)&ep->com.remote_addr; 236 if (id) { 237 *lsin6 = (struct sockaddr_in6 *)&id->local_addr; 238 *rsin6 = (struct sockaddr_in6 *)&id->remote_addr; 239 } else { 240 *lsin6 = &zero_sin6; 241 *rsin6 = &zero_sin6; 242 } 243 } 244 245 static int dump_qp(unsigned long id, struct c4iw_qp *qp, 246 struct c4iw_debugfs_data *qpd) 247 { 248 int space; 249 int cc; 250 if (id != qp->wq.sq.qid) 251 return 0; 252 253 space = qpd->bufsize - qpd->pos - 1; 254 if (space == 0) 255 return 1; 256 257 if (qp->ep) { 258 struct c4iw_ep *ep = qp->ep; 259 260 if (ep->com.local_addr.ss_family == AF_INET) { 261 struct sockaddr_in *lsin; 262 struct sockaddr_in *rsin; 263 struct sockaddr_in *m_lsin; 264 struct sockaddr_in *m_rsin; 265 266 set_ep_sin_addrs(ep, &lsin, &rsin, &m_lsin, &m_rsin); 267 cc = snprintf(qpd->buf + qpd->pos, space, 268 "rc qp sq id %u %s id %u state %u " 269 "onchip %u ep tid %u state %u " 270 "%pI4:%u/%u->%pI4:%u/%u\n", 271 qp->wq.sq.qid, qp->srq ? "srq" : "rq", 272 qp->srq ? qp->srq->idx : qp->wq.rq.qid, 273 (int)qp->attr.state, 274 qp->wq.sq.flags & T4_SQ_ONCHIP, 275 ep->hwtid, (int)ep->com.state, 276 &lsin->sin_addr, ntohs(lsin->sin_port), 277 ntohs(m_lsin->sin_port), 278 &rsin->sin_addr, ntohs(rsin->sin_port), 279 ntohs(m_rsin->sin_port)); 280 } else { 281 struct sockaddr_in6 *lsin6; 282 struct sockaddr_in6 *rsin6; 283 struct sockaddr_in6 *m_lsin6; 284 struct sockaddr_in6 *m_rsin6; 285 286 set_ep_sin6_addrs(ep, &lsin6, &rsin6, &m_lsin6, 287 &m_rsin6); 288 cc = snprintf(qpd->buf + qpd->pos, space, 289 "rc qp sq id %u rq id %u state %u " 290 "onchip %u ep tid %u state %u " 291 "%pI6:%u/%u->%pI6:%u/%u\n", 292 qp->wq.sq.qid, qp->wq.rq.qid, 293 (int)qp->attr.state, 294 qp->wq.sq.flags & T4_SQ_ONCHIP, 295 ep->hwtid, (int)ep->com.state, 296 &lsin6->sin6_addr, 297 ntohs(lsin6->sin6_port), 298 ntohs(m_lsin6->sin6_port), 299 &rsin6->sin6_addr, 300 ntohs(rsin6->sin6_port), 301 ntohs(m_rsin6->sin6_port)); 302 } 303 } else 304 cc = snprintf(qpd->buf + qpd->pos, space, 305 "qp sq id %u rq id %u state %u onchip %u\n", 306 qp->wq.sq.qid, qp->wq.rq.qid, 307 (int)qp->attr.state, 308 qp->wq.sq.flags & T4_SQ_ONCHIP); 309 if (cc < space) 310 qpd->pos += cc; 311 return 0; 312 } 313 314 static int qp_release(struct inode *inode, struct file *file) 315 { 316 struct c4iw_debugfs_data *qpd = file->private_data; 317 if (!qpd) { 318 pr_info("%s null qpd?\n", __func__); 319 return 0; 320 } 321 vfree(qpd->buf); 322 kfree(qpd); 323 return 0; 324 } 325 326 static int qp_open(struct inode *inode, struct file *file) 327 { 328 struct c4iw_qp *qp; 329 struct c4iw_debugfs_data *qpd; 330 unsigned long index; 331 int count = 1; 332 333 qpd = kmalloc(sizeof(*qpd), GFP_KERNEL); 334 if (!qpd) 335 return -ENOMEM; 336 337 qpd->devp = inode->i_private; 338 qpd->pos = 0; 339 340 /* 341 * No need to lock; we drop the lock to call vmalloc so it's racy 342 * anyway. Someone who cares should switch this over to seq_file 343 */ 344 xa_for_each(&qpd->devp->qps, index, qp) 345 count++; 346 347 qpd->bufsize = count * 180; 348 qpd->buf = vmalloc(qpd->bufsize); 349 if (!qpd->buf) { 350 kfree(qpd); 351 return -ENOMEM; 352 } 353 354 xa_lock_irq(&qpd->devp->qps); 355 xa_for_each(&qpd->devp->qps, index, qp) 356 dump_qp(index, qp, qpd); 357 xa_unlock_irq(&qpd->devp->qps); 358 359 qpd->buf[qpd->pos++] = 0; 360 file->private_data = qpd; 361 return 0; 362 } 363 364 static const struct file_operations qp_debugfs_fops = { 365 .owner = THIS_MODULE, 366 .open = qp_open, 367 .release = qp_release, 368 .read = debugfs_read, 369 .llseek = default_llseek, 370 }; 371 372 static int dump_stag(unsigned long id, struct c4iw_debugfs_data *stagd) 373 { 374 int space; 375 int cc; 376 struct fw_ri_tpte tpte; 377 int ret; 378 379 space = stagd->bufsize - stagd->pos - 1; 380 if (space == 0) 381 return 1; 382 383 ret = cxgb4_read_tpte(stagd->devp->rdev.lldi.ports[0], (u32)id<<8, 384 (__be32 *)&tpte); 385 if (ret) { 386 dev_err(&stagd->devp->rdev.lldi.pdev->dev, 387 "%s cxgb4_read_tpte err %d\n", __func__, ret); 388 return ret; 389 } 390 cc = snprintf(stagd->buf + stagd->pos, space, 391 "stag: idx 0x%x valid %d key 0x%x state %d pdid %d " 392 "perm 0x%x ps %d len 0x%llx va 0x%llx\n", 393 (u32)id<<8, 394 FW_RI_TPTE_VALID_G(ntohl(tpte.valid_to_pdid)), 395 FW_RI_TPTE_STAGKEY_G(ntohl(tpte.valid_to_pdid)), 396 FW_RI_TPTE_STAGSTATE_G(ntohl(tpte.valid_to_pdid)), 397 FW_RI_TPTE_PDID_G(ntohl(tpte.valid_to_pdid)), 398 FW_RI_TPTE_PERM_G(ntohl(tpte.locread_to_qpid)), 399 FW_RI_TPTE_PS_G(ntohl(tpte.locread_to_qpid)), 400 ((u64)ntohl(tpte.len_hi) << 32) | ntohl(tpte.len_lo), 401 ((u64)ntohl(tpte.va_hi) << 32) | ntohl(tpte.va_lo_fbo)); 402 if (cc < space) 403 stagd->pos += cc; 404 return 0; 405 } 406 407 static int stag_release(struct inode *inode, struct file *file) 408 { 409 struct c4iw_debugfs_data *stagd = file->private_data; 410 if (!stagd) { 411 pr_info("%s null stagd?\n", __func__); 412 return 0; 413 } 414 vfree(stagd->buf); 415 kfree(stagd); 416 return 0; 417 } 418 419 static int stag_open(struct inode *inode, struct file *file) 420 { 421 struct c4iw_debugfs_data *stagd; 422 void *p; 423 unsigned long index; 424 int ret = 0; 425 int count = 1; 426 427 stagd = kmalloc(sizeof(*stagd), GFP_KERNEL); 428 if (!stagd) { 429 ret = -ENOMEM; 430 goto out; 431 } 432 stagd->devp = inode->i_private; 433 stagd->pos = 0; 434 435 xa_for_each(&stagd->devp->mrs, index, p) 436 count++; 437 438 stagd->bufsize = count * 256; 439 stagd->buf = vmalloc(stagd->bufsize); 440 if (!stagd->buf) { 441 ret = -ENOMEM; 442 goto err1; 443 } 444 445 xa_lock_irq(&stagd->devp->mrs); 446 xa_for_each(&stagd->devp->mrs, index, p) 447 dump_stag(index, stagd); 448 xa_unlock_irq(&stagd->devp->mrs); 449 450 stagd->buf[stagd->pos++] = 0; 451 file->private_data = stagd; 452 goto out; 453 err1: 454 kfree(stagd); 455 out: 456 return ret; 457 } 458 459 static const struct file_operations stag_debugfs_fops = { 460 .owner = THIS_MODULE, 461 .open = stag_open, 462 .release = stag_release, 463 .read = debugfs_read, 464 .llseek = default_llseek, 465 }; 466 467 static char *db_state_str[] = {"NORMAL", "FLOW_CONTROL", "RECOVERY", "STOPPED"}; 468 469 static int stats_show(struct seq_file *seq, void *v) 470 { 471 struct c4iw_dev *dev = seq->private; 472 473 seq_printf(seq, " Object: %10s %10s %10s %10s\n", "Total", "Current", 474 "Max", "Fail"); 475 seq_printf(seq, " PDID: %10llu %10llu %10llu %10llu\n", 476 dev->rdev.stats.pd.total, dev->rdev.stats.pd.cur, 477 dev->rdev.stats.pd.max, dev->rdev.stats.pd.fail); 478 seq_printf(seq, " QID: %10llu %10llu %10llu %10llu\n", 479 dev->rdev.stats.qid.total, dev->rdev.stats.qid.cur, 480 dev->rdev.stats.qid.max, dev->rdev.stats.qid.fail); 481 seq_printf(seq, " SRQS: %10llu %10llu %10llu %10llu\n", 482 dev->rdev.stats.srqt.total, dev->rdev.stats.srqt.cur, 483 dev->rdev.stats.srqt.max, dev->rdev.stats.srqt.fail); 484 seq_printf(seq, " TPTMEM: %10llu %10llu %10llu %10llu\n", 485 dev->rdev.stats.stag.total, dev->rdev.stats.stag.cur, 486 dev->rdev.stats.stag.max, dev->rdev.stats.stag.fail); 487 seq_printf(seq, " PBLMEM: %10llu %10llu %10llu %10llu\n", 488 dev->rdev.stats.pbl.total, dev->rdev.stats.pbl.cur, 489 dev->rdev.stats.pbl.max, dev->rdev.stats.pbl.fail); 490 seq_printf(seq, " RQTMEM: %10llu %10llu %10llu %10llu\n", 491 dev->rdev.stats.rqt.total, dev->rdev.stats.rqt.cur, 492 dev->rdev.stats.rqt.max, dev->rdev.stats.rqt.fail); 493 seq_printf(seq, " OCQPMEM: %10llu %10llu %10llu %10llu\n", 494 dev->rdev.stats.ocqp.total, dev->rdev.stats.ocqp.cur, 495 dev->rdev.stats.ocqp.max, dev->rdev.stats.ocqp.fail); 496 seq_printf(seq, " DB FULL: %10llu\n", dev->rdev.stats.db_full); 497 seq_printf(seq, " DB EMPTY: %10llu\n", dev->rdev.stats.db_empty); 498 seq_printf(seq, " DB DROP: %10llu\n", dev->rdev.stats.db_drop); 499 seq_printf(seq, " DB State: %s Transitions %llu FC Interruptions %llu\n", 500 db_state_str[dev->db_state], 501 dev->rdev.stats.db_state_transitions, 502 dev->rdev.stats.db_fc_interruptions); 503 seq_printf(seq, "TCAM_FULL: %10llu\n", dev->rdev.stats.tcam_full); 504 seq_printf(seq, "ACT_OFLD_CONN_FAILS: %10llu\n", 505 dev->rdev.stats.act_ofld_conn_fails); 506 seq_printf(seq, "PAS_OFLD_CONN_FAILS: %10llu\n", 507 dev->rdev.stats.pas_ofld_conn_fails); 508 seq_printf(seq, "NEG_ADV_RCVD: %10llu\n", dev->rdev.stats.neg_adv); 509 seq_printf(seq, "AVAILABLE IRD: %10u\n", dev->avail_ird); 510 return 0; 511 } 512 513 static int stats_open(struct inode *inode, struct file *file) 514 { 515 return single_open(file, stats_show, inode->i_private); 516 } 517 518 static ssize_t stats_clear(struct file *file, const char __user *buf, 519 size_t count, loff_t *pos) 520 { 521 struct c4iw_dev *dev = ((struct seq_file *)file->private_data)->private; 522 523 mutex_lock(&dev->rdev.stats.lock); 524 dev->rdev.stats.pd.max = 0; 525 dev->rdev.stats.pd.fail = 0; 526 dev->rdev.stats.qid.max = 0; 527 dev->rdev.stats.qid.fail = 0; 528 dev->rdev.stats.stag.max = 0; 529 dev->rdev.stats.stag.fail = 0; 530 dev->rdev.stats.pbl.max = 0; 531 dev->rdev.stats.pbl.fail = 0; 532 dev->rdev.stats.rqt.max = 0; 533 dev->rdev.stats.rqt.fail = 0; 534 dev->rdev.stats.rqt.max = 0; 535 dev->rdev.stats.rqt.fail = 0; 536 dev->rdev.stats.ocqp.max = 0; 537 dev->rdev.stats.ocqp.fail = 0; 538 dev->rdev.stats.db_full = 0; 539 dev->rdev.stats.db_empty = 0; 540 dev->rdev.stats.db_drop = 0; 541 dev->rdev.stats.db_state_transitions = 0; 542 dev->rdev.stats.tcam_full = 0; 543 dev->rdev.stats.act_ofld_conn_fails = 0; 544 dev->rdev.stats.pas_ofld_conn_fails = 0; 545 mutex_unlock(&dev->rdev.stats.lock); 546 return count; 547 } 548 549 static const struct file_operations stats_debugfs_fops = { 550 .owner = THIS_MODULE, 551 .open = stats_open, 552 .release = single_release, 553 .read = seq_read, 554 .llseek = seq_lseek, 555 .write = stats_clear, 556 }; 557 558 static int dump_ep(struct c4iw_ep *ep, struct c4iw_debugfs_data *epd) 559 { 560 int space; 561 int cc; 562 563 space = epd->bufsize - epd->pos - 1; 564 if (space == 0) 565 return 1; 566 567 if (ep->com.local_addr.ss_family == AF_INET) { 568 struct sockaddr_in *lsin; 569 struct sockaddr_in *rsin; 570 struct sockaddr_in *m_lsin; 571 struct sockaddr_in *m_rsin; 572 573 set_ep_sin_addrs(ep, &lsin, &rsin, &m_lsin, &m_rsin); 574 cc = snprintf(epd->buf + epd->pos, space, 575 "ep %p cm_id %p qp %p state %d flags 0x%lx " 576 "history 0x%lx hwtid %d atid %d " 577 "conn_na %u abort_na %u " 578 "%pI4:%d/%d <-> %pI4:%d/%d\n", 579 ep, ep->com.cm_id, ep->com.qp, 580 (int)ep->com.state, ep->com.flags, 581 ep->com.history, ep->hwtid, ep->atid, 582 ep->stats.connect_neg_adv, 583 ep->stats.abort_neg_adv, 584 &lsin->sin_addr, ntohs(lsin->sin_port), 585 ntohs(m_lsin->sin_port), 586 &rsin->sin_addr, ntohs(rsin->sin_port), 587 ntohs(m_rsin->sin_port)); 588 } else { 589 struct sockaddr_in6 *lsin6; 590 struct sockaddr_in6 *rsin6; 591 struct sockaddr_in6 *m_lsin6; 592 struct sockaddr_in6 *m_rsin6; 593 594 set_ep_sin6_addrs(ep, &lsin6, &rsin6, &m_lsin6, &m_rsin6); 595 cc = snprintf(epd->buf + epd->pos, space, 596 "ep %p cm_id %p qp %p state %d flags 0x%lx " 597 "history 0x%lx hwtid %d atid %d " 598 "conn_na %u abort_na %u " 599 "%pI6:%d/%d <-> %pI6:%d/%d\n", 600 ep, ep->com.cm_id, ep->com.qp, 601 (int)ep->com.state, ep->com.flags, 602 ep->com.history, ep->hwtid, ep->atid, 603 ep->stats.connect_neg_adv, 604 ep->stats.abort_neg_adv, 605 &lsin6->sin6_addr, ntohs(lsin6->sin6_port), 606 ntohs(m_lsin6->sin6_port), 607 &rsin6->sin6_addr, ntohs(rsin6->sin6_port), 608 ntohs(m_rsin6->sin6_port)); 609 } 610 if (cc < space) 611 epd->pos += cc; 612 return 0; 613 } 614 615 static 616 int dump_listen_ep(struct c4iw_listen_ep *ep, struct c4iw_debugfs_data *epd) 617 { 618 int space; 619 int cc; 620 621 space = epd->bufsize - epd->pos - 1; 622 if (space == 0) 623 return 1; 624 625 if (ep->com.local_addr.ss_family == AF_INET) { 626 struct sockaddr_in *lsin = (struct sockaddr_in *) 627 &ep->com.cm_id->local_addr; 628 struct sockaddr_in *m_lsin = (struct sockaddr_in *) 629 &ep->com.cm_id->m_local_addr; 630 631 cc = snprintf(epd->buf + epd->pos, space, 632 "ep %p cm_id %p state %d flags 0x%lx stid %d " 633 "backlog %d %pI4:%d/%d\n", 634 ep, ep->com.cm_id, (int)ep->com.state, 635 ep->com.flags, ep->stid, ep->backlog, 636 &lsin->sin_addr, ntohs(lsin->sin_port), 637 ntohs(m_lsin->sin_port)); 638 } else { 639 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *) 640 &ep->com.cm_id->local_addr; 641 struct sockaddr_in6 *m_lsin6 = (struct sockaddr_in6 *) 642 &ep->com.cm_id->m_local_addr; 643 644 cc = snprintf(epd->buf + epd->pos, space, 645 "ep %p cm_id %p state %d flags 0x%lx stid %d " 646 "backlog %d %pI6:%d/%d\n", 647 ep, ep->com.cm_id, (int)ep->com.state, 648 ep->com.flags, ep->stid, ep->backlog, 649 &lsin6->sin6_addr, ntohs(lsin6->sin6_port), 650 ntohs(m_lsin6->sin6_port)); 651 } 652 if (cc < space) 653 epd->pos += cc; 654 return 0; 655 } 656 657 static int ep_release(struct inode *inode, struct file *file) 658 { 659 struct c4iw_debugfs_data *epd = file->private_data; 660 if (!epd) { 661 pr_info("%s null qpd?\n", __func__); 662 return 0; 663 } 664 vfree(epd->buf); 665 kfree(epd); 666 return 0; 667 } 668 669 static int ep_open(struct inode *inode, struct file *file) 670 { 671 struct c4iw_ep *ep; 672 struct c4iw_listen_ep *lep; 673 unsigned long index; 674 struct c4iw_debugfs_data *epd; 675 int ret = 0; 676 int count = 1; 677 678 epd = kmalloc(sizeof(*epd), GFP_KERNEL); 679 if (!epd) { 680 ret = -ENOMEM; 681 goto out; 682 } 683 epd->devp = inode->i_private; 684 epd->pos = 0; 685 686 xa_for_each(&epd->devp->hwtids, index, ep) 687 count++; 688 xa_for_each(&epd->devp->atids, index, ep) 689 count++; 690 xa_for_each(&epd->devp->stids, index, lep) 691 count++; 692 693 epd->bufsize = count * 240; 694 epd->buf = vmalloc(epd->bufsize); 695 if (!epd->buf) { 696 ret = -ENOMEM; 697 goto err1; 698 } 699 700 xa_lock_irq(&epd->devp->hwtids); 701 xa_for_each(&epd->devp->hwtids, index, ep) 702 dump_ep(ep, epd); 703 xa_unlock_irq(&epd->devp->hwtids); 704 xa_lock_irq(&epd->devp->atids); 705 xa_for_each(&epd->devp->atids, index, ep) 706 dump_ep(ep, epd); 707 xa_unlock_irq(&epd->devp->atids); 708 xa_lock_irq(&epd->devp->stids); 709 xa_for_each(&epd->devp->stids, index, lep) 710 dump_listen_ep(lep, epd); 711 xa_unlock_irq(&epd->devp->stids); 712 713 file->private_data = epd; 714 goto out; 715 err1: 716 kfree(epd); 717 out: 718 return ret; 719 } 720 721 static const struct file_operations ep_debugfs_fops = { 722 .owner = THIS_MODULE, 723 .open = ep_open, 724 .release = ep_release, 725 .read = debugfs_read, 726 }; 727 728 static void setup_debugfs(struct c4iw_dev *devp) 729 { 730 debugfs_create_file_size("qps", S_IWUSR, devp->debugfs_root, 731 (void *)devp, &qp_debugfs_fops, 4096); 732 733 debugfs_create_file_size("stags", S_IWUSR, devp->debugfs_root, 734 (void *)devp, &stag_debugfs_fops, 4096); 735 736 debugfs_create_file_size("stats", S_IWUSR, devp->debugfs_root, 737 (void *)devp, &stats_debugfs_fops, 4096); 738 739 debugfs_create_file_size("eps", S_IWUSR, devp->debugfs_root, 740 (void *)devp, &ep_debugfs_fops, 4096); 741 742 if (c4iw_wr_log) 743 debugfs_create_file_size("wr_log", S_IWUSR, devp->debugfs_root, 744 (void *)devp, &wr_log_debugfs_fops, 4096); 745 } 746 747 void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev, 748 struct c4iw_dev_ucontext *uctx) 749 { 750 struct list_head *pos, *nxt; 751 struct c4iw_qid_list *entry; 752 753 mutex_lock(&uctx->lock); 754 list_for_each_safe(pos, nxt, &uctx->qpids) { 755 entry = list_entry(pos, struct c4iw_qid_list, entry); 756 list_del_init(&entry->entry); 757 if (!(entry->qid & rdev->qpmask)) { 758 c4iw_put_resource(&rdev->resource.qid_table, 759 entry->qid); 760 mutex_lock(&rdev->stats.lock); 761 rdev->stats.qid.cur -= rdev->qpmask + 1; 762 mutex_unlock(&rdev->stats.lock); 763 } 764 kfree(entry); 765 } 766 767 list_for_each_safe(pos, nxt, &uctx->cqids) { 768 entry = list_entry(pos, struct c4iw_qid_list, entry); 769 list_del_init(&entry->entry); 770 kfree(entry); 771 } 772 mutex_unlock(&uctx->lock); 773 } 774 775 void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev, 776 struct c4iw_dev_ucontext *uctx) 777 { 778 INIT_LIST_HEAD(&uctx->qpids); 779 INIT_LIST_HEAD(&uctx->cqids); 780 mutex_init(&uctx->lock); 781 } 782 783 /* Caller takes care of locking if needed */ 784 static int c4iw_rdev_open(struct c4iw_rdev *rdev) 785 { 786 int err; 787 unsigned int factor; 788 789 c4iw_init_dev_ucontext(rdev, &rdev->uctx); 790 791 /* 792 * This implementation assumes udb_density == ucq_density! Eventually 793 * we might need to support this but for now fail the open. Also the 794 * cqid and qpid range must match for now. 795 */ 796 if (rdev->lldi.udb_density != rdev->lldi.ucq_density) { 797 pr_err("%s: unsupported udb/ucq densities %u/%u\n", 798 pci_name(rdev->lldi.pdev), rdev->lldi.udb_density, 799 rdev->lldi.ucq_density); 800 return -EINVAL; 801 } 802 if (rdev->lldi.vr->qp.start != rdev->lldi.vr->cq.start || 803 rdev->lldi.vr->qp.size != rdev->lldi.vr->cq.size) { 804 pr_err("%s: unsupported qp and cq id ranges qp start %u size %u cq start %u size %u\n", 805 pci_name(rdev->lldi.pdev), rdev->lldi.vr->qp.start, 806 rdev->lldi.vr->qp.size, rdev->lldi.vr->cq.size, 807 rdev->lldi.vr->cq.size); 808 return -EINVAL; 809 } 810 811 /* This implementation requires a sge_host_page_size <= PAGE_SIZE. */ 812 if (rdev->lldi.sge_host_page_size > PAGE_SIZE) { 813 pr_err("%s: unsupported sge host page size %u\n", 814 pci_name(rdev->lldi.pdev), 815 rdev->lldi.sge_host_page_size); 816 return -EINVAL; 817 } 818 819 factor = PAGE_SIZE / rdev->lldi.sge_host_page_size; 820 rdev->qpmask = (rdev->lldi.udb_density * factor) - 1; 821 rdev->cqmask = (rdev->lldi.ucq_density * factor) - 1; 822 823 pr_debug("dev %s stag start 0x%0x size 0x%0x num stags %d pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x qp qid start %u size %u cq qid start %u size %u srq size %u\n", 824 pci_name(rdev->lldi.pdev), rdev->lldi.vr->stag.start, 825 rdev->lldi.vr->stag.size, c4iw_num_stags(rdev), 826 rdev->lldi.vr->pbl.start, 827 rdev->lldi.vr->pbl.size, rdev->lldi.vr->rq.start, 828 rdev->lldi.vr->rq.size, 829 rdev->lldi.vr->qp.start, 830 rdev->lldi.vr->qp.size, 831 rdev->lldi.vr->cq.start, 832 rdev->lldi.vr->cq.size, 833 rdev->lldi.vr->srq.size); 834 pr_debug("udb %pR db_reg %p gts_reg %p qpmask 0x%x cqmask 0x%x\n", 835 &rdev->lldi.pdev->resource[2], 836 rdev->lldi.db_reg, rdev->lldi.gts_reg, 837 rdev->qpmask, rdev->cqmask); 838 839 if (c4iw_num_stags(rdev) == 0) 840 return -EINVAL; 841 842 rdev->stats.pd.total = T4_MAX_NUM_PD; 843 rdev->stats.stag.total = rdev->lldi.vr->stag.size; 844 rdev->stats.pbl.total = rdev->lldi.vr->pbl.size; 845 rdev->stats.rqt.total = rdev->lldi.vr->rq.size; 846 rdev->stats.srqt.total = rdev->lldi.vr->srq.size; 847 rdev->stats.ocqp.total = rdev->lldi.vr->ocq.size; 848 rdev->stats.qid.total = rdev->lldi.vr->qp.size; 849 850 err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), 851 T4_MAX_NUM_PD, rdev->lldi.vr->srq.size); 852 if (err) { 853 pr_err("error %d initializing resources\n", err); 854 return err; 855 } 856 err = c4iw_pblpool_create(rdev); 857 if (err) { 858 pr_err("error %d initializing pbl pool\n", err); 859 goto destroy_resource; 860 } 861 err = c4iw_rqtpool_create(rdev); 862 if (err) { 863 pr_err("error %d initializing rqt pool\n", err); 864 goto destroy_pblpool; 865 } 866 err = c4iw_ocqp_pool_create(rdev); 867 if (err) { 868 pr_err("error %d initializing ocqp pool\n", err); 869 goto destroy_rqtpool; 870 } 871 rdev->status_page = (struct t4_dev_status_page *) 872 __get_free_page(GFP_KERNEL); 873 if (!rdev->status_page) { 874 err = -ENOMEM; 875 goto destroy_ocqp_pool; 876 } 877 rdev->status_page->qp_start = rdev->lldi.vr->qp.start; 878 rdev->status_page->qp_size = rdev->lldi.vr->qp.size; 879 rdev->status_page->cq_start = rdev->lldi.vr->cq.start; 880 rdev->status_page->cq_size = rdev->lldi.vr->cq.size; 881 rdev->status_page->write_cmpl_supported = rdev->lldi.write_cmpl_support; 882 883 if (c4iw_wr_log) { 884 rdev->wr_log = kcalloc(1 << c4iw_wr_log_size_order, 885 sizeof(*rdev->wr_log), 886 GFP_KERNEL); 887 if (rdev->wr_log) { 888 rdev->wr_log_size = 1 << c4iw_wr_log_size_order; 889 atomic_set(&rdev->wr_log_idx, 0); 890 } 891 } 892 893 rdev->free_workq = create_singlethread_workqueue("iw_cxgb4_free"); 894 if (!rdev->free_workq) { 895 err = -ENOMEM; 896 goto err_free_status_page_and_wr_log; 897 } 898 899 rdev->status_page->db_off = 0; 900 901 init_completion(&rdev->rqt_compl); 902 init_completion(&rdev->pbl_compl); 903 kref_init(&rdev->rqt_kref); 904 kref_init(&rdev->pbl_kref); 905 906 return 0; 907 err_free_status_page_and_wr_log: 908 if (c4iw_wr_log && rdev->wr_log) 909 kfree(rdev->wr_log); 910 free_page((unsigned long)rdev->status_page); 911 destroy_ocqp_pool: 912 c4iw_ocqp_pool_destroy(rdev); 913 destroy_rqtpool: 914 c4iw_rqtpool_destroy(rdev); 915 destroy_pblpool: 916 c4iw_pblpool_destroy(rdev); 917 destroy_resource: 918 c4iw_destroy_resource(&rdev->resource); 919 return err; 920 } 921 922 static void c4iw_rdev_close(struct c4iw_rdev *rdev) 923 { 924 kfree(rdev->wr_log); 925 c4iw_release_dev_ucontext(rdev, &rdev->uctx); 926 free_page((unsigned long)rdev->status_page); 927 c4iw_pblpool_destroy(rdev); 928 c4iw_rqtpool_destroy(rdev); 929 wait_for_completion(&rdev->pbl_compl); 930 wait_for_completion(&rdev->rqt_compl); 931 c4iw_ocqp_pool_destroy(rdev); 932 destroy_workqueue(rdev->free_workq); 933 c4iw_destroy_resource(&rdev->resource); 934 } 935 936 void c4iw_dealloc(struct uld_ctx *ctx) 937 { 938 c4iw_rdev_close(&ctx->dev->rdev); 939 WARN_ON(!xa_empty(&ctx->dev->cqs)); 940 WARN_ON(!xa_empty(&ctx->dev->qps)); 941 WARN_ON(!xa_empty(&ctx->dev->mrs)); 942 wait_event(ctx->dev->wait, xa_empty(&ctx->dev->hwtids)); 943 WARN_ON(!xa_empty(&ctx->dev->stids)); 944 WARN_ON(!xa_empty(&ctx->dev->atids)); 945 if (ctx->dev->rdev.bar2_kva) 946 iounmap(ctx->dev->rdev.bar2_kva); 947 if (ctx->dev->rdev.oc_mw_kva) 948 iounmap(ctx->dev->rdev.oc_mw_kva); 949 ib_dealloc_device(&ctx->dev->ibdev); 950 ctx->dev = NULL; 951 } 952 953 static void c4iw_remove(struct uld_ctx *ctx) 954 { 955 pr_debug("c4iw_dev %p\n", ctx->dev); 956 debugfs_remove_recursive(ctx->dev->debugfs_root); 957 c4iw_unregister_device(ctx->dev); 958 c4iw_dealloc(ctx); 959 } 960 961 static int rdma_supported(const struct cxgb4_lld_info *infop) 962 { 963 return infop->vr->stag.size > 0 && infop->vr->pbl.size > 0 && 964 infop->vr->rq.size > 0 && infop->vr->qp.size > 0 && 965 infop->vr->cq.size > 0; 966 } 967 968 static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop) 969 { 970 struct c4iw_dev *devp; 971 int ret; 972 973 if (!rdma_supported(infop)) { 974 pr_info("%s: RDMA not supported on this device\n", 975 pci_name(infop->pdev)); 976 return ERR_PTR(-ENOSYS); 977 } 978 if (!ocqp_supported(infop)) 979 pr_info("%s: On-Chip Queues not supported on this device\n", 980 pci_name(infop->pdev)); 981 982 devp = ib_alloc_device(c4iw_dev, ibdev); 983 if (!devp) { 984 pr_err("Cannot allocate ib device\n"); 985 return ERR_PTR(-ENOMEM); 986 } 987 devp->rdev.lldi = *infop; 988 989 /* init various hw-queue params based on lld info */ 990 pr_debug("Ing. padding boundary is %d, egrsstatuspagesize = %d\n", 991 devp->rdev.lldi.sge_ingpadboundary, 992 devp->rdev.lldi.sge_egrstatuspagesize); 993 994 devp->rdev.hw_queue.t4_eq_status_entries = 995 devp->rdev.lldi.sge_egrstatuspagesize / 64; 996 devp->rdev.hw_queue.t4_max_eq_size = 65520; 997 devp->rdev.hw_queue.t4_max_iq_size = 65520; 998 devp->rdev.hw_queue.t4_max_rq_size = 8192 - 999 devp->rdev.hw_queue.t4_eq_status_entries - 1; 1000 devp->rdev.hw_queue.t4_max_sq_size = 1001 devp->rdev.hw_queue.t4_max_eq_size - 1002 devp->rdev.hw_queue.t4_eq_status_entries - 1; 1003 devp->rdev.hw_queue.t4_max_qp_depth = 1004 devp->rdev.hw_queue.t4_max_rq_size; 1005 devp->rdev.hw_queue.t4_max_cq_depth = 1006 devp->rdev.hw_queue.t4_max_iq_size - 2; 1007 devp->rdev.hw_queue.t4_stat_len = 1008 devp->rdev.lldi.sge_egrstatuspagesize; 1009 1010 /* 1011 * For T5/T6 devices, we map all of BAR2 with WC. 1012 * For T4 devices with onchip qp mem, we map only that part 1013 * of BAR2 with WC. 1014 */ 1015 devp->rdev.bar2_pa = pci_resource_start(devp->rdev.lldi.pdev, 2); 1016 if (!is_t4(devp->rdev.lldi.adapter_type)) { 1017 devp->rdev.bar2_kva = ioremap_wc(devp->rdev.bar2_pa, 1018 pci_resource_len(devp->rdev.lldi.pdev, 2)); 1019 if (!devp->rdev.bar2_kva) { 1020 pr_err("Unable to ioremap BAR2\n"); 1021 ib_dealloc_device(&devp->ibdev); 1022 return ERR_PTR(-EINVAL); 1023 } 1024 } else if (ocqp_supported(infop)) { 1025 devp->rdev.oc_mw_pa = 1026 pci_resource_start(devp->rdev.lldi.pdev, 2) + 1027 pci_resource_len(devp->rdev.lldi.pdev, 2) - 1028 roundup_pow_of_two(devp->rdev.lldi.vr->ocq.size); 1029 devp->rdev.oc_mw_kva = ioremap_wc(devp->rdev.oc_mw_pa, 1030 devp->rdev.lldi.vr->ocq.size); 1031 if (!devp->rdev.oc_mw_kva) { 1032 pr_err("Unable to ioremap onchip mem\n"); 1033 ib_dealloc_device(&devp->ibdev); 1034 return ERR_PTR(-EINVAL); 1035 } 1036 } 1037 1038 pr_debug("ocq memory: hw_start 0x%x size %u mw_pa 0x%lx mw_kva %p\n", 1039 devp->rdev.lldi.vr->ocq.start, devp->rdev.lldi.vr->ocq.size, 1040 devp->rdev.oc_mw_pa, devp->rdev.oc_mw_kva); 1041 1042 ret = c4iw_rdev_open(&devp->rdev); 1043 if (ret) { 1044 pr_err("Unable to open CXIO rdev err %d\n", ret); 1045 ib_dealloc_device(&devp->ibdev); 1046 return ERR_PTR(ret); 1047 } 1048 1049 xa_init_flags(&devp->cqs, XA_FLAGS_LOCK_IRQ); 1050 xa_init_flags(&devp->qps, XA_FLAGS_LOCK_IRQ); 1051 xa_init_flags(&devp->mrs, XA_FLAGS_LOCK_IRQ); 1052 xa_init_flags(&devp->hwtids, XA_FLAGS_LOCK_IRQ); 1053 xa_init_flags(&devp->atids, XA_FLAGS_LOCK_IRQ); 1054 xa_init_flags(&devp->stids, XA_FLAGS_LOCK_IRQ); 1055 mutex_init(&devp->rdev.stats.lock); 1056 mutex_init(&devp->db_mutex); 1057 INIT_LIST_HEAD(&devp->db_fc_list); 1058 init_waitqueue_head(&devp->wait); 1059 devp->avail_ird = devp->rdev.lldi.max_ird_adapter; 1060 1061 if (c4iw_debugfs_root) { 1062 devp->debugfs_root = debugfs_create_dir( 1063 pci_name(devp->rdev.lldi.pdev), 1064 c4iw_debugfs_root); 1065 setup_debugfs(devp); 1066 } 1067 1068 1069 return devp; 1070 } 1071 1072 static void *c4iw_uld_add(const struct cxgb4_lld_info *infop) 1073 { 1074 struct uld_ctx *ctx; 1075 static int vers_printed; 1076 int i; 1077 1078 if (!vers_printed++) 1079 pr_info("Chelsio T4/T5 RDMA Driver - version %s\n", 1080 DRV_VERSION); 1081 1082 ctx = kzalloc(sizeof(*ctx), GFP_KERNEL); 1083 if (!ctx) { 1084 ctx = ERR_PTR(-ENOMEM); 1085 goto out; 1086 } 1087 ctx->lldi = *infop; 1088 1089 pr_debug("found device %s nchan %u nrxq %u ntxq %u nports %u\n", 1090 pci_name(ctx->lldi.pdev), 1091 ctx->lldi.nchan, ctx->lldi.nrxq, 1092 ctx->lldi.ntxq, ctx->lldi.nports); 1093 1094 mutex_lock(&dev_mutex); 1095 list_add_tail(&ctx->entry, &uld_ctx_list); 1096 mutex_unlock(&dev_mutex); 1097 1098 for (i = 0; i < ctx->lldi.nrxq; i++) 1099 pr_debug("rxqid[%u] %u\n", i, ctx->lldi.rxq_ids[i]); 1100 out: 1101 return ctx; 1102 } 1103 1104 static inline struct sk_buff *copy_gl_to_skb_pkt(const struct pkt_gl *gl, 1105 const __be64 *rsp, 1106 u32 pktshift) 1107 { 1108 struct sk_buff *skb; 1109 1110 /* 1111 * Allocate space for cpl_pass_accept_req which will be synthesized by 1112 * driver. Once the driver synthesizes the request the skb will go 1113 * through the regular cpl_pass_accept_req processing. 1114 * The math here assumes sizeof cpl_pass_accept_req >= sizeof 1115 * cpl_rx_pkt. 1116 */ 1117 skb = alloc_skb(gl->tot_len + sizeof(struct cpl_pass_accept_req) + 1118 sizeof(struct rss_header) - pktshift, GFP_ATOMIC); 1119 if (unlikely(!skb)) 1120 return NULL; 1121 1122 __skb_put(skb, gl->tot_len + sizeof(struct cpl_pass_accept_req) + 1123 sizeof(struct rss_header) - pktshift); 1124 1125 /* 1126 * This skb will contain: 1127 * rss_header from the rspq descriptor (1 flit) 1128 * cpl_rx_pkt struct from the rspq descriptor (2 flits) 1129 * space for the difference between the size of an 1130 * rx_pkt and pass_accept_req cpl (1 flit) 1131 * the packet data from the gl 1132 */ 1133 skb_copy_to_linear_data(skb, rsp, sizeof(struct cpl_pass_accept_req) + 1134 sizeof(struct rss_header)); 1135 skb_copy_to_linear_data_offset(skb, sizeof(struct rss_header) + 1136 sizeof(struct cpl_pass_accept_req), 1137 gl->va + pktshift, 1138 gl->tot_len - pktshift); 1139 return skb; 1140 } 1141 1142 static inline int recv_rx_pkt(struct c4iw_dev *dev, const struct pkt_gl *gl, 1143 const __be64 *rsp) 1144 { 1145 unsigned int opcode = *(u8 *)rsp; 1146 struct sk_buff *skb; 1147 1148 if (opcode != CPL_RX_PKT) 1149 goto out; 1150 1151 skb = copy_gl_to_skb_pkt(gl , rsp, dev->rdev.lldi.sge_pktshift); 1152 if (skb == NULL) 1153 goto out; 1154 1155 if (c4iw_handlers[opcode] == NULL) { 1156 pr_info("%s no handler opcode 0x%x...\n", __func__, opcode); 1157 kfree_skb(skb); 1158 goto out; 1159 } 1160 c4iw_handlers[opcode](dev, skb); 1161 return 1; 1162 out: 1163 return 0; 1164 } 1165 1166 static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp, 1167 const struct pkt_gl *gl) 1168 { 1169 struct uld_ctx *ctx = handle; 1170 struct c4iw_dev *dev = ctx->dev; 1171 struct sk_buff *skb; 1172 u8 opcode; 1173 1174 if (gl == NULL) { 1175 /* omit RSS and rsp_ctrl at end of descriptor */ 1176 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8; 1177 1178 skb = alloc_skb(256, GFP_ATOMIC); 1179 if (!skb) 1180 goto nomem; 1181 __skb_put(skb, len); 1182 skb_copy_to_linear_data(skb, &rsp[1], len); 1183 } else if (gl == CXGB4_MSG_AN) { 1184 const struct rsp_ctrl *rc = (void *)rsp; 1185 1186 u32 qid = be32_to_cpu(rc->pldbuflen_qid); 1187 c4iw_ev_handler(dev, qid); 1188 return 0; 1189 } else if (unlikely(*(u8 *)rsp != *(u8 *)gl->va)) { 1190 if (recv_rx_pkt(dev, gl, rsp)) 1191 return 0; 1192 1193 pr_info("%s: unexpected FL contents at %p, RSS %#llx, FL %#llx, len %u\n", 1194 pci_name(ctx->lldi.pdev), gl->va, 1195 be64_to_cpu(*rsp), 1196 be64_to_cpu(*(__force __be64 *)gl->va), 1197 gl->tot_len); 1198 1199 return 0; 1200 } else { 1201 skb = cxgb4_pktgl_to_skb(gl, 128, 128); 1202 if (unlikely(!skb)) 1203 goto nomem; 1204 } 1205 1206 opcode = *(u8 *)rsp; 1207 if (c4iw_handlers[opcode]) { 1208 c4iw_handlers[opcode](dev, skb); 1209 } else { 1210 pr_info("%s no handler opcode 0x%x...\n", __func__, opcode); 1211 kfree_skb(skb); 1212 } 1213 1214 return 0; 1215 nomem: 1216 return -1; 1217 } 1218 1219 static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state) 1220 { 1221 struct uld_ctx *ctx = handle; 1222 1223 pr_debug("new_state %u\n", new_state); 1224 switch (new_state) { 1225 case CXGB4_STATE_UP: 1226 pr_info("%s: Up\n", pci_name(ctx->lldi.pdev)); 1227 if (!ctx->dev) { 1228 ctx->dev = c4iw_alloc(&ctx->lldi); 1229 if (IS_ERR(ctx->dev)) { 1230 pr_err("%s: initialization failed: %ld\n", 1231 pci_name(ctx->lldi.pdev), 1232 PTR_ERR(ctx->dev)); 1233 ctx->dev = NULL; 1234 break; 1235 } 1236 1237 INIT_WORK(&ctx->reg_work, c4iw_register_device); 1238 queue_work(reg_workq, &ctx->reg_work); 1239 } 1240 break; 1241 case CXGB4_STATE_DOWN: 1242 pr_info("%s: Down\n", pci_name(ctx->lldi.pdev)); 1243 if (ctx->dev) 1244 c4iw_remove(ctx); 1245 break; 1246 case CXGB4_STATE_FATAL_ERROR: 1247 case CXGB4_STATE_START_RECOVERY: 1248 pr_info("%s: Fatal Error\n", pci_name(ctx->lldi.pdev)); 1249 if (ctx->dev) { 1250 struct ib_event event = {}; 1251 1252 ctx->dev->rdev.flags |= T4_FATAL_ERROR; 1253 event.event = IB_EVENT_DEVICE_FATAL; 1254 event.device = &ctx->dev->ibdev; 1255 ib_dispatch_event(&event); 1256 c4iw_remove(ctx); 1257 } 1258 break; 1259 case CXGB4_STATE_DETACH: 1260 pr_info("%s: Detach\n", pci_name(ctx->lldi.pdev)); 1261 if (ctx->dev) 1262 c4iw_remove(ctx); 1263 break; 1264 } 1265 return 0; 1266 } 1267 1268 static void stop_queues(struct uld_ctx *ctx) 1269 { 1270 struct c4iw_qp *qp; 1271 unsigned long index, flags; 1272 1273 xa_lock_irqsave(&ctx->dev->qps, flags); 1274 ctx->dev->rdev.stats.db_state_transitions++; 1275 ctx->dev->db_state = STOPPED; 1276 if (ctx->dev->rdev.flags & T4_STATUS_PAGE_DISABLED) { 1277 xa_for_each(&ctx->dev->qps, index, qp) 1278 t4_disable_wq_db(&qp->wq); 1279 } else { 1280 ctx->dev->rdev.status_page->db_off = 1; 1281 } 1282 xa_unlock_irqrestore(&ctx->dev->qps, flags); 1283 } 1284 1285 static void resume_rc_qp(struct c4iw_qp *qp) 1286 { 1287 spin_lock(&qp->lock); 1288 t4_ring_sq_db(&qp->wq, qp->wq.sq.wq_pidx_inc, NULL); 1289 qp->wq.sq.wq_pidx_inc = 0; 1290 t4_ring_rq_db(&qp->wq, qp->wq.rq.wq_pidx_inc, NULL); 1291 qp->wq.rq.wq_pidx_inc = 0; 1292 spin_unlock(&qp->lock); 1293 } 1294 1295 static void resume_a_chunk(struct uld_ctx *ctx) 1296 { 1297 int i; 1298 struct c4iw_qp *qp; 1299 1300 for (i = 0; i < DB_FC_RESUME_SIZE; i++) { 1301 qp = list_first_entry(&ctx->dev->db_fc_list, struct c4iw_qp, 1302 db_fc_entry); 1303 list_del_init(&qp->db_fc_entry); 1304 resume_rc_qp(qp); 1305 if (list_empty(&ctx->dev->db_fc_list)) 1306 break; 1307 } 1308 } 1309 1310 static void resume_queues(struct uld_ctx *ctx) 1311 { 1312 xa_lock_irq(&ctx->dev->qps); 1313 if (ctx->dev->db_state != STOPPED) 1314 goto out; 1315 ctx->dev->db_state = FLOW_CONTROL; 1316 while (1) { 1317 if (list_empty(&ctx->dev->db_fc_list)) { 1318 struct c4iw_qp *qp; 1319 unsigned long index; 1320 1321 WARN_ON(ctx->dev->db_state != FLOW_CONTROL); 1322 ctx->dev->db_state = NORMAL; 1323 ctx->dev->rdev.stats.db_state_transitions++; 1324 if (ctx->dev->rdev.flags & T4_STATUS_PAGE_DISABLED) { 1325 xa_for_each(&ctx->dev->qps, index, qp) 1326 t4_enable_wq_db(&qp->wq); 1327 } else { 1328 ctx->dev->rdev.status_page->db_off = 0; 1329 } 1330 break; 1331 } else { 1332 if (cxgb4_dbfifo_count(ctx->dev->rdev.lldi.ports[0], 1) 1333 < (ctx->dev->rdev.lldi.dbfifo_int_thresh << 1334 DB_FC_DRAIN_THRESH)) { 1335 resume_a_chunk(ctx); 1336 } 1337 if (!list_empty(&ctx->dev->db_fc_list)) { 1338 xa_unlock_irq(&ctx->dev->qps); 1339 if (DB_FC_RESUME_DELAY) { 1340 set_current_state(TASK_UNINTERRUPTIBLE); 1341 schedule_timeout(DB_FC_RESUME_DELAY); 1342 } 1343 xa_lock_irq(&ctx->dev->qps); 1344 if (ctx->dev->db_state != FLOW_CONTROL) 1345 break; 1346 } 1347 } 1348 } 1349 out: 1350 if (ctx->dev->db_state != NORMAL) 1351 ctx->dev->rdev.stats.db_fc_interruptions++; 1352 xa_unlock_irq(&ctx->dev->qps); 1353 } 1354 1355 struct qp_list { 1356 unsigned idx; 1357 struct c4iw_qp **qps; 1358 }; 1359 1360 static void deref_qps(struct qp_list *qp_list) 1361 { 1362 int idx; 1363 1364 for (idx = 0; idx < qp_list->idx; idx++) 1365 c4iw_qp_rem_ref(&qp_list->qps[idx]->ibqp); 1366 } 1367 1368 static void recover_lost_dbs(struct uld_ctx *ctx, struct qp_list *qp_list) 1369 { 1370 int idx; 1371 int ret; 1372 1373 for (idx = 0; idx < qp_list->idx; idx++) { 1374 struct c4iw_qp *qp = qp_list->qps[idx]; 1375 1376 xa_lock_irq(&qp->rhp->qps); 1377 spin_lock(&qp->lock); 1378 ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0], 1379 qp->wq.sq.qid, 1380 t4_sq_host_wq_pidx(&qp->wq), 1381 t4_sq_wq_size(&qp->wq)); 1382 if (ret) { 1383 pr_err("%s: Fatal error - DB overflow recovery failed - error syncing SQ qid %u\n", 1384 pci_name(ctx->lldi.pdev), qp->wq.sq.qid); 1385 spin_unlock(&qp->lock); 1386 xa_unlock_irq(&qp->rhp->qps); 1387 return; 1388 } 1389 qp->wq.sq.wq_pidx_inc = 0; 1390 1391 ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0], 1392 qp->wq.rq.qid, 1393 t4_rq_host_wq_pidx(&qp->wq), 1394 t4_rq_wq_size(&qp->wq)); 1395 1396 if (ret) { 1397 pr_err("%s: Fatal error - DB overflow recovery failed - error syncing RQ qid %u\n", 1398 pci_name(ctx->lldi.pdev), qp->wq.rq.qid); 1399 spin_unlock(&qp->lock); 1400 xa_unlock_irq(&qp->rhp->qps); 1401 return; 1402 } 1403 qp->wq.rq.wq_pidx_inc = 0; 1404 spin_unlock(&qp->lock); 1405 xa_unlock_irq(&qp->rhp->qps); 1406 1407 /* Wait for the dbfifo to drain */ 1408 while (cxgb4_dbfifo_count(qp->rhp->rdev.lldi.ports[0], 1) > 0) { 1409 set_current_state(TASK_UNINTERRUPTIBLE); 1410 schedule_timeout(usecs_to_jiffies(10)); 1411 } 1412 } 1413 } 1414 1415 static void recover_queues(struct uld_ctx *ctx) 1416 { 1417 struct c4iw_qp *qp; 1418 unsigned long index; 1419 int count = 0; 1420 struct qp_list qp_list; 1421 int ret; 1422 1423 /* slow everybody down */ 1424 set_current_state(TASK_UNINTERRUPTIBLE); 1425 schedule_timeout(usecs_to_jiffies(1000)); 1426 1427 /* flush the SGE contexts */ 1428 ret = cxgb4_flush_eq_cache(ctx->dev->rdev.lldi.ports[0]); 1429 if (ret) { 1430 pr_err("%s: Fatal error - DB overflow recovery failed\n", 1431 pci_name(ctx->lldi.pdev)); 1432 return; 1433 } 1434 1435 /* Count active queues so we can build a list of queues to recover */ 1436 xa_lock_irq(&ctx->dev->qps); 1437 WARN_ON(ctx->dev->db_state != STOPPED); 1438 ctx->dev->db_state = RECOVERY; 1439 xa_for_each(&ctx->dev->qps, index, qp) 1440 count++; 1441 1442 qp_list.qps = kcalloc(count, sizeof(*qp_list.qps), GFP_ATOMIC); 1443 if (!qp_list.qps) { 1444 xa_unlock_irq(&ctx->dev->qps); 1445 return; 1446 } 1447 qp_list.idx = 0; 1448 1449 /* add and ref each qp so it doesn't get freed */ 1450 xa_for_each(&ctx->dev->qps, index, qp) { 1451 c4iw_qp_add_ref(&qp->ibqp); 1452 qp_list.qps[qp_list.idx++] = qp; 1453 } 1454 1455 xa_unlock_irq(&ctx->dev->qps); 1456 1457 /* now traverse the list in a safe context to recover the db state*/ 1458 recover_lost_dbs(ctx, &qp_list); 1459 1460 /* we're almost done! deref the qps and clean up */ 1461 deref_qps(&qp_list); 1462 kfree(qp_list.qps); 1463 1464 xa_lock_irq(&ctx->dev->qps); 1465 WARN_ON(ctx->dev->db_state != RECOVERY); 1466 ctx->dev->db_state = STOPPED; 1467 xa_unlock_irq(&ctx->dev->qps); 1468 } 1469 1470 static int c4iw_uld_control(void *handle, enum cxgb4_control control, ...) 1471 { 1472 struct uld_ctx *ctx = handle; 1473 1474 switch (control) { 1475 case CXGB4_CONTROL_DB_FULL: 1476 stop_queues(ctx); 1477 ctx->dev->rdev.stats.db_full++; 1478 break; 1479 case CXGB4_CONTROL_DB_EMPTY: 1480 resume_queues(ctx); 1481 mutex_lock(&ctx->dev->rdev.stats.lock); 1482 ctx->dev->rdev.stats.db_empty++; 1483 mutex_unlock(&ctx->dev->rdev.stats.lock); 1484 break; 1485 case CXGB4_CONTROL_DB_DROP: 1486 recover_queues(ctx); 1487 mutex_lock(&ctx->dev->rdev.stats.lock); 1488 ctx->dev->rdev.stats.db_drop++; 1489 mutex_unlock(&ctx->dev->rdev.stats.lock); 1490 break; 1491 default: 1492 pr_warn("%s: unknown control cmd %u\n", 1493 pci_name(ctx->lldi.pdev), control); 1494 break; 1495 } 1496 return 0; 1497 } 1498 1499 static struct cxgb4_uld_info c4iw_uld_info = { 1500 .name = DRV_NAME, 1501 .nrxq = MAX_ULD_QSETS, 1502 .ntxq = MAX_ULD_QSETS, 1503 .rxq_size = 511, 1504 .ciq = true, 1505 .lro = false, 1506 .add = c4iw_uld_add, 1507 .rx_handler = c4iw_uld_rx_handler, 1508 .state_change = c4iw_uld_state_change, 1509 .control = c4iw_uld_control, 1510 }; 1511 1512 void _c4iw_free_wr_wait(struct kref *kref) 1513 { 1514 struct c4iw_wr_wait *wr_waitp; 1515 1516 wr_waitp = container_of(kref, struct c4iw_wr_wait, kref); 1517 pr_debug("Free wr_wait %p\n", wr_waitp); 1518 kfree(wr_waitp); 1519 } 1520 1521 struct c4iw_wr_wait *c4iw_alloc_wr_wait(gfp_t gfp) 1522 { 1523 struct c4iw_wr_wait *wr_waitp; 1524 1525 wr_waitp = kzalloc(sizeof(*wr_waitp), gfp); 1526 if (wr_waitp) { 1527 kref_init(&wr_waitp->kref); 1528 pr_debug("wr_wait %p\n", wr_waitp); 1529 } 1530 return wr_waitp; 1531 } 1532 1533 static int __init c4iw_init_module(void) 1534 { 1535 int err; 1536 1537 err = c4iw_cm_init(); 1538 if (err) 1539 return err; 1540 1541 c4iw_debugfs_root = debugfs_create_dir(DRV_NAME, NULL); 1542 1543 reg_workq = create_singlethread_workqueue("Register_iWARP_device"); 1544 if (!reg_workq) { 1545 pr_err("Failed creating workqueue to register iwarp device\n"); 1546 return -ENOMEM; 1547 } 1548 1549 cxgb4_register_uld(CXGB4_ULD_RDMA, &c4iw_uld_info); 1550 1551 return 0; 1552 } 1553 1554 static void __exit c4iw_exit_module(void) 1555 { 1556 struct uld_ctx *ctx, *tmp; 1557 1558 mutex_lock(&dev_mutex); 1559 list_for_each_entry_safe(ctx, tmp, &uld_ctx_list, entry) { 1560 if (ctx->dev) 1561 c4iw_remove(ctx); 1562 kfree(ctx); 1563 } 1564 mutex_unlock(&dev_mutex); 1565 destroy_workqueue(reg_workq); 1566 cxgb4_unregister_uld(CXGB4_ULD_RDMA); 1567 c4iw_cm_term(); 1568 debugfs_remove_recursive(c4iw_debugfs_root); 1569 } 1570 1571 module_init(c4iw_init_module); 1572 module_exit(c4iw_exit_module); 1573