2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/debugfs.h>
35 #include <linux/vmalloc.h>
37 #include <rdma/ib_verbs.h>
41 #define DRV_VERSION "0.1"
43 MODULE_AUTHOR("Steve Wise");
44 MODULE_DESCRIPTION("Chelsio T4/T5 RDMA Driver");
45 MODULE_LICENSE("Dual BSD/GPL");
46 MODULE_VERSION(DRV_VERSION);
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)");
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)");
59 struct list_head entry;
60 struct cxgb4_lld_info lldi;
64 static LIST_HEAD(uld_ctx_list);
65 static DEFINE_MUTEX(dev_mutex);
67 #define DB_FC_RESUME_SIZE 64
68 #define DB_FC_RESUME_DELAY 1
69 #define DB_FC_DRAIN_THRESH 0
71 static struct dentry *c4iw_debugfs_root;
73 struct c4iw_debugfs_data {
74 struct c4iw_dev *devp;
80 /* registered cxgb4 netlink callbacks */
81 static struct ibnl_client_cbs c4iw_nl_cb_table[] = {
82 [RDMA_NL_IWPM_REG_PID] = {.dump = iwpm_register_pid_cb},
83 [RDMA_NL_IWPM_ADD_MAPPING] = {.dump = iwpm_add_mapping_cb},
84 [RDMA_NL_IWPM_QUERY_MAPPING] = {.dump = iwpm_add_and_query_mapping_cb},
85 [RDMA_NL_IWPM_HANDLE_ERR] = {.dump = iwpm_mapping_error_cb},
86 [RDMA_NL_IWPM_MAPINFO] = {.dump = iwpm_mapping_info_cb},
87 [RDMA_NL_IWPM_MAPINFO_NUM] = {.dump = iwpm_ack_mapping_info_cb}
90 static int count_idrs(int id, void *p, void *data)
94 *countp = *countp + 1;
98 static ssize_t debugfs_read(struct file *file, char __user *buf, size_t count,
101 struct c4iw_debugfs_data *d = file->private_data;
103 return simple_read_from_buffer(buf, count, ppos, d->buf, d->pos);
106 static int dump_qp(int id, void *p, void *data)
108 struct c4iw_qp *qp = p;
109 struct c4iw_debugfs_data *qpd = data;
113 if (id != qp->wq.sq.qid)
116 space = qpd->bufsize - qpd->pos - 1;
121 if (qp->ep->com.local_addr.ss_family == AF_INET) {
122 struct sockaddr_in *lsin = (struct sockaddr_in *)
123 &qp->ep->com.local_addr;
124 struct sockaddr_in *rsin = (struct sockaddr_in *)
125 &qp->ep->com.remote_addr;
126 struct sockaddr_in *mapped_lsin = (struct sockaddr_in *)
127 &qp->ep->com.mapped_local_addr;
128 struct sockaddr_in *mapped_rsin = (struct sockaddr_in *)
129 &qp->ep->com.mapped_remote_addr;
131 cc = snprintf(qpd->buf + qpd->pos, space,
132 "rc qp sq id %u rq id %u state %u "
133 "onchip %u ep tid %u state %u "
134 "%pI4:%u/%u->%pI4:%u/%u\n",
135 qp->wq.sq.qid, qp->wq.rq.qid,
137 qp->wq.sq.flags & T4_SQ_ONCHIP,
138 qp->ep->hwtid, (int)qp->ep->com.state,
139 &lsin->sin_addr, ntohs(lsin->sin_port),
140 ntohs(mapped_lsin->sin_port),
141 &rsin->sin_addr, ntohs(rsin->sin_port),
142 ntohs(mapped_rsin->sin_port));
144 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)
145 &qp->ep->com.local_addr;
146 struct sockaddr_in6 *rsin6 = (struct sockaddr_in6 *)
147 &qp->ep->com.remote_addr;
148 struct sockaddr_in6 *mapped_lsin6 =
149 (struct sockaddr_in6 *)
150 &qp->ep->com.mapped_local_addr;
151 struct sockaddr_in6 *mapped_rsin6 =
152 (struct sockaddr_in6 *)
153 &qp->ep->com.mapped_remote_addr;
155 cc = snprintf(qpd->buf + qpd->pos, space,
156 "rc qp sq id %u rq id %u state %u "
157 "onchip %u ep tid %u state %u "
158 "%pI6:%u/%u->%pI6:%u/%u\n",
159 qp->wq.sq.qid, qp->wq.rq.qid,
161 qp->wq.sq.flags & T4_SQ_ONCHIP,
162 qp->ep->hwtid, (int)qp->ep->com.state,
164 ntohs(lsin6->sin6_port),
165 ntohs(mapped_lsin6->sin6_port),
167 ntohs(rsin6->sin6_port),
168 ntohs(mapped_rsin6->sin6_port));
171 cc = snprintf(qpd->buf + qpd->pos, space,
172 "qp sq id %u rq id %u state %u onchip %u\n",
173 qp->wq.sq.qid, qp->wq.rq.qid,
175 qp->wq.sq.flags & T4_SQ_ONCHIP);
181 static int qp_release(struct inode *inode, struct file *file)
183 struct c4iw_debugfs_data *qpd = file->private_data;
185 printk(KERN_INFO "%s null qpd?\n", __func__);
193 static int qp_open(struct inode *inode, struct file *file)
195 struct c4iw_debugfs_data *qpd;
199 qpd = kmalloc(sizeof *qpd, GFP_KERNEL);
204 qpd->devp = inode->i_private;
207 spin_lock_irq(&qpd->devp->lock);
208 idr_for_each(&qpd->devp->qpidr, count_idrs, &count);
209 spin_unlock_irq(&qpd->devp->lock);
211 qpd->bufsize = count * 128;
212 qpd->buf = vmalloc(qpd->bufsize);
218 spin_lock_irq(&qpd->devp->lock);
219 idr_for_each(&qpd->devp->qpidr, dump_qp, qpd);
220 spin_unlock_irq(&qpd->devp->lock);
222 qpd->buf[qpd->pos++] = 0;
223 file->private_data = qpd;
231 static const struct file_operations qp_debugfs_fops = {
232 .owner = THIS_MODULE,
234 .release = qp_release,
235 .read = debugfs_read,
236 .llseek = default_llseek,
239 static int dump_stag(int id, void *p, void *data)
241 struct c4iw_debugfs_data *stagd = data;
245 space = stagd->bufsize - stagd->pos - 1;
249 cc = snprintf(stagd->buf + stagd->pos, space, "0x%x\n", id<<8);
255 static int stag_release(struct inode *inode, struct file *file)
257 struct c4iw_debugfs_data *stagd = file->private_data;
259 printk(KERN_INFO "%s null stagd?\n", __func__);
267 static int stag_open(struct inode *inode, struct file *file)
269 struct c4iw_debugfs_data *stagd;
273 stagd = kmalloc(sizeof *stagd, GFP_KERNEL);
278 stagd->devp = inode->i_private;
281 spin_lock_irq(&stagd->devp->lock);
282 idr_for_each(&stagd->devp->mmidr, count_idrs, &count);
283 spin_unlock_irq(&stagd->devp->lock);
285 stagd->bufsize = count * sizeof("0x12345678\n");
286 stagd->buf = kmalloc(stagd->bufsize, GFP_KERNEL);
292 spin_lock_irq(&stagd->devp->lock);
293 idr_for_each(&stagd->devp->mmidr, dump_stag, stagd);
294 spin_unlock_irq(&stagd->devp->lock);
296 stagd->buf[stagd->pos++] = 0;
297 file->private_data = stagd;
305 static const struct file_operations stag_debugfs_fops = {
306 .owner = THIS_MODULE,
308 .release = stag_release,
309 .read = debugfs_read,
310 .llseek = default_llseek,
313 static char *db_state_str[] = {"NORMAL", "FLOW_CONTROL", "RECOVERY", "STOPPED"};
315 static int stats_show(struct seq_file *seq, void *v)
317 struct c4iw_dev *dev = seq->private;
319 seq_printf(seq, " Object: %10s %10s %10s %10s\n", "Total", "Current",
321 seq_printf(seq, " PDID: %10llu %10llu %10llu %10llu\n",
322 dev->rdev.stats.pd.total, dev->rdev.stats.pd.cur,
323 dev->rdev.stats.pd.max, dev->rdev.stats.pd.fail);
324 seq_printf(seq, " QID: %10llu %10llu %10llu %10llu\n",
325 dev->rdev.stats.qid.total, dev->rdev.stats.qid.cur,
326 dev->rdev.stats.qid.max, dev->rdev.stats.qid.fail);
327 seq_printf(seq, " TPTMEM: %10llu %10llu %10llu %10llu\n",
328 dev->rdev.stats.stag.total, dev->rdev.stats.stag.cur,
329 dev->rdev.stats.stag.max, dev->rdev.stats.stag.fail);
330 seq_printf(seq, " PBLMEM: %10llu %10llu %10llu %10llu\n",
331 dev->rdev.stats.pbl.total, dev->rdev.stats.pbl.cur,
332 dev->rdev.stats.pbl.max, dev->rdev.stats.pbl.fail);
333 seq_printf(seq, " RQTMEM: %10llu %10llu %10llu %10llu\n",
334 dev->rdev.stats.rqt.total, dev->rdev.stats.rqt.cur,
335 dev->rdev.stats.rqt.max, dev->rdev.stats.rqt.fail);
336 seq_printf(seq, " OCQPMEM: %10llu %10llu %10llu %10llu\n",
337 dev->rdev.stats.ocqp.total, dev->rdev.stats.ocqp.cur,
338 dev->rdev.stats.ocqp.max, dev->rdev.stats.ocqp.fail);
339 seq_printf(seq, " DB FULL: %10llu\n", dev->rdev.stats.db_full);
340 seq_printf(seq, " DB EMPTY: %10llu\n", dev->rdev.stats.db_empty);
341 seq_printf(seq, " DB DROP: %10llu\n", dev->rdev.stats.db_drop);
342 seq_printf(seq, " DB State: %s Transitions %llu FC Interruptions %llu\n",
343 db_state_str[dev->db_state],
344 dev->rdev.stats.db_state_transitions,
345 dev->rdev.stats.db_fc_interruptions);
346 seq_printf(seq, "TCAM_FULL: %10llu\n", dev->rdev.stats.tcam_full);
347 seq_printf(seq, "ACT_OFLD_CONN_FAILS: %10llu\n",
348 dev->rdev.stats.act_ofld_conn_fails);
349 seq_printf(seq, "PAS_OFLD_CONN_FAILS: %10llu\n",
350 dev->rdev.stats.pas_ofld_conn_fails);
354 static int stats_open(struct inode *inode, struct file *file)
356 return single_open(file, stats_show, inode->i_private);
359 static ssize_t stats_clear(struct file *file, const char __user *buf,
360 size_t count, loff_t *pos)
362 struct c4iw_dev *dev = ((struct seq_file *)file->private_data)->private;
364 mutex_lock(&dev->rdev.stats.lock);
365 dev->rdev.stats.pd.max = 0;
366 dev->rdev.stats.pd.fail = 0;
367 dev->rdev.stats.qid.max = 0;
368 dev->rdev.stats.qid.fail = 0;
369 dev->rdev.stats.stag.max = 0;
370 dev->rdev.stats.stag.fail = 0;
371 dev->rdev.stats.pbl.max = 0;
372 dev->rdev.stats.pbl.fail = 0;
373 dev->rdev.stats.rqt.max = 0;
374 dev->rdev.stats.rqt.fail = 0;
375 dev->rdev.stats.ocqp.max = 0;
376 dev->rdev.stats.ocqp.fail = 0;
377 dev->rdev.stats.db_full = 0;
378 dev->rdev.stats.db_empty = 0;
379 dev->rdev.stats.db_drop = 0;
380 dev->rdev.stats.db_state_transitions = 0;
381 dev->rdev.stats.tcam_full = 0;
382 dev->rdev.stats.act_ofld_conn_fails = 0;
383 dev->rdev.stats.pas_ofld_conn_fails = 0;
384 mutex_unlock(&dev->rdev.stats.lock);
388 static const struct file_operations stats_debugfs_fops = {
389 .owner = THIS_MODULE,
391 .release = single_release,
394 .write = stats_clear,
397 static int dump_ep(int id, void *p, void *data)
399 struct c4iw_ep *ep = p;
400 struct c4iw_debugfs_data *epd = data;
404 space = epd->bufsize - epd->pos - 1;
408 if (ep->com.local_addr.ss_family == AF_INET) {
409 struct sockaddr_in *lsin = (struct sockaddr_in *)
411 struct sockaddr_in *rsin = (struct sockaddr_in *)
412 &ep->com.remote_addr;
413 struct sockaddr_in *mapped_lsin = (struct sockaddr_in *)
414 &ep->com.mapped_local_addr;
415 struct sockaddr_in *mapped_rsin = (struct sockaddr_in *)
416 &ep->com.mapped_remote_addr;
418 cc = snprintf(epd->buf + epd->pos, space,
419 "ep %p cm_id %p qp %p state %d flags 0x%lx "
420 "history 0x%lx hwtid %d atid %d "
421 "%pI4:%d/%d <-> %pI4:%d/%d\n",
422 ep, ep->com.cm_id, ep->com.qp,
423 (int)ep->com.state, ep->com.flags,
424 ep->com.history, ep->hwtid, ep->atid,
425 &lsin->sin_addr, ntohs(lsin->sin_port),
426 ntohs(mapped_lsin->sin_port),
427 &rsin->sin_addr, ntohs(rsin->sin_port),
428 ntohs(mapped_rsin->sin_port));
430 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)
432 struct sockaddr_in6 *rsin6 = (struct sockaddr_in6 *)
433 &ep->com.remote_addr;
434 struct sockaddr_in6 *mapped_lsin6 = (struct sockaddr_in6 *)
435 &ep->com.mapped_local_addr;
436 struct sockaddr_in6 *mapped_rsin6 = (struct sockaddr_in6 *)
437 &ep->com.mapped_remote_addr;
439 cc = snprintf(epd->buf + epd->pos, space,
440 "ep %p cm_id %p qp %p state %d flags 0x%lx "
441 "history 0x%lx hwtid %d atid %d "
442 "%pI6:%d/%d <-> %pI6:%d/%d\n",
443 ep, ep->com.cm_id, ep->com.qp,
444 (int)ep->com.state, ep->com.flags,
445 ep->com.history, ep->hwtid, ep->atid,
446 &lsin6->sin6_addr, ntohs(lsin6->sin6_port),
447 ntohs(mapped_lsin6->sin6_port),
448 &rsin6->sin6_addr, ntohs(rsin6->sin6_port),
449 ntohs(mapped_rsin6->sin6_port));
456 static int dump_listen_ep(int id, void *p, void *data)
458 struct c4iw_listen_ep *ep = p;
459 struct c4iw_debugfs_data *epd = data;
463 space = epd->bufsize - epd->pos - 1;
467 if (ep->com.local_addr.ss_family == AF_INET) {
468 struct sockaddr_in *lsin = (struct sockaddr_in *)
470 struct sockaddr_in *mapped_lsin = (struct sockaddr_in *)
471 &ep->com.mapped_local_addr;
473 cc = snprintf(epd->buf + epd->pos, space,
474 "ep %p cm_id %p state %d flags 0x%lx stid %d "
475 "backlog %d %pI4:%d/%d\n",
476 ep, ep->com.cm_id, (int)ep->com.state,
477 ep->com.flags, ep->stid, ep->backlog,
478 &lsin->sin_addr, ntohs(lsin->sin_port),
479 ntohs(mapped_lsin->sin_port));
481 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)
483 struct sockaddr_in6 *mapped_lsin6 = (struct sockaddr_in6 *)
484 &ep->com.mapped_local_addr;
486 cc = snprintf(epd->buf + epd->pos, space,
487 "ep %p cm_id %p state %d flags 0x%lx stid %d "
488 "backlog %d %pI6:%d/%d\n",
489 ep, ep->com.cm_id, (int)ep->com.state,
490 ep->com.flags, ep->stid, ep->backlog,
491 &lsin6->sin6_addr, ntohs(lsin6->sin6_port),
492 ntohs(mapped_lsin6->sin6_port));
499 static int ep_release(struct inode *inode, struct file *file)
501 struct c4iw_debugfs_data *epd = file->private_data;
503 pr_info("%s null qpd?\n", __func__);
511 static int ep_open(struct inode *inode, struct file *file)
513 struct c4iw_debugfs_data *epd;
517 epd = kmalloc(sizeof(*epd), GFP_KERNEL);
522 epd->devp = inode->i_private;
525 spin_lock_irq(&epd->devp->lock);
526 idr_for_each(&epd->devp->hwtid_idr, count_idrs, &count);
527 idr_for_each(&epd->devp->atid_idr, count_idrs, &count);
528 idr_for_each(&epd->devp->stid_idr, count_idrs, &count);
529 spin_unlock_irq(&epd->devp->lock);
531 epd->bufsize = count * 160;
532 epd->buf = vmalloc(epd->bufsize);
538 spin_lock_irq(&epd->devp->lock);
539 idr_for_each(&epd->devp->hwtid_idr, dump_ep, epd);
540 idr_for_each(&epd->devp->atid_idr, dump_ep, epd);
541 idr_for_each(&epd->devp->stid_idr, dump_listen_ep, epd);
542 spin_unlock_irq(&epd->devp->lock);
544 file->private_data = epd;
552 static const struct file_operations ep_debugfs_fops = {
553 .owner = THIS_MODULE,
555 .release = ep_release,
556 .read = debugfs_read,
559 static int setup_debugfs(struct c4iw_dev *devp)
563 if (!devp->debugfs_root)
566 de = debugfs_create_file("qps", S_IWUSR, devp->debugfs_root,
567 (void *)devp, &qp_debugfs_fops);
568 if (de && de->d_inode)
569 de->d_inode->i_size = 4096;
571 de = debugfs_create_file("stags", S_IWUSR, devp->debugfs_root,
572 (void *)devp, &stag_debugfs_fops);
573 if (de && de->d_inode)
574 de->d_inode->i_size = 4096;
576 de = debugfs_create_file("stats", S_IWUSR, devp->debugfs_root,
577 (void *)devp, &stats_debugfs_fops);
578 if (de && de->d_inode)
579 de->d_inode->i_size = 4096;
581 de = debugfs_create_file("eps", S_IWUSR, devp->debugfs_root,
582 (void *)devp, &ep_debugfs_fops);
583 if (de && de->d_inode)
584 de->d_inode->i_size = 4096;
589 void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev,
590 struct c4iw_dev_ucontext *uctx)
592 struct list_head *pos, *nxt;
593 struct c4iw_qid_list *entry;
595 mutex_lock(&uctx->lock);
596 list_for_each_safe(pos, nxt, &uctx->qpids) {
597 entry = list_entry(pos, struct c4iw_qid_list, entry);
598 list_del_init(&entry->entry);
599 if (!(entry->qid & rdev->qpmask)) {
600 c4iw_put_resource(&rdev->resource.qid_table,
602 mutex_lock(&rdev->stats.lock);
603 rdev->stats.qid.cur -= rdev->qpmask + 1;
604 mutex_unlock(&rdev->stats.lock);
609 list_for_each_safe(pos, nxt, &uctx->qpids) {
610 entry = list_entry(pos, struct c4iw_qid_list, entry);
611 list_del_init(&entry->entry);
614 mutex_unlock(&uctx->lock);
617 void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev,
618 struct c4iw_dev_ucontext *uctx)
620 INIT_LIST_HEAD(&uctx->qpids);
621 INIT_LIST_HEAD(&uctx->cqids);
622 mutex_init(&uctx->lock);
625 /* Caller takes care of locking if needed */
626 static int c4iw_rdev_open(struct c4iw_rdev *rdev)
630 c4iw_init_dev_ucontext(rdev, &rdev->uctx);
633 * qpshift is the number of bits to shift the qpid left in order
634 * to get the correct address of the doorbell for that qp.
636 rdev->qpshift = PAGE_SHIFT - ilog2(rdev->lldi.udb_density);
637 rdev->qpmask = rdev->lldi.udb_density - 1;
638 rdev->cqshift = PAGE_SHIFT - ilog2(rdev->lldi.ucq_density);
639 rdev->cqmask = rdev->lldi.ucq_density - 1;
640 PDBG("%s dev %s stag start 0x%0x size 0x%0x num stags %d "
641 "pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x "
642 "qp qid start %u size %u cq qid start %u size %u\n",
643 __func__, pci_name(rdev->lldi.pdev), rdev->lldi.vr->stag.start,
644 rdev->lldi.vr->stag.size, c4iw_num_stags(rdev),
645 rdev->lldi.vr->pbl.start,
646 rdev->lldi.vr->pbl.size, rdev->lldi.vr->rq.start,
647 rdev->lldi.vr->rq.size,
648 rdev->lldi.vr->qp.start,
649 rdev->lldi.vr->qp.size,
650 rdev->lldi.vr->cq.start,
651 rdev->lldi.vr->cq.size);
652 PDBG("udb len 0x%x udb base %llx db_reg %p gts_reg %p qpshift %lu "
653 "qpmask 0x%x cqshift %lu cqmask 0x%x\n",
654 (unsigned)pci_resource_len(rdev->lldi.pdev, 2),
655 (u64)pci_resource_start(rdev->lldi.pdev, 2),
658 rdev->qpshift, rdev->qpmask,
659 rdev->cqshift, rdev->cqmask);
661 if (c4iw_num_stags(rdev) == 0) {
666 rdev->stats.pd.total = T4_MAX_NUM_PD;
667 rdev->stats.stag.total = rdev->lldi.vr->stag.size;
668 rdev->stats.pbl.total = rdev->lldi.vr->pbl.size;
669 rdev->stats.rqt.total = rdev->lldi.vr->rq.size;
670 rdev->stats.ocqp.total = rdev->lldi.vr->ocq.size;
671 rdev->stats.qid.total = rdev->lldi.vr->qp.size;
673 err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD);
675 printk(KERN_ERR MOD "error %d initializing resources\n", err);
678 err = c4iw_pblpool_create(rdev);
680 printk(KERN_ERR MOD "error %d initializing pbl pool\n", err);
683 err = c4iw_rqtpool_create(rdev);
685 printk(KERN_ERR MOD "error %d initializing rqt pool\n", err);
688 err = c4iw_ocqp_pool_create(rdev);
690 printk(KERN_ERR MOD "error %d initializing ocqp pool\n", err);
693 rdev->status_page = (struct t4_dev_status_page *)
694 __get_free_page(GFP_KERNEL);
695 if (!rdev->status_page) {
696 pr_err(MOD "error allocating status page\n");
701 c4iw_rqtpool_destroy(rdev);
703 c4iw_pblpool_destroy(rdev);
705 c4iw_destroy_resource(&rdev->resource);
710 static void c4iw_rdev_close(struct c4iw_rdev *rdev)
712 free_page((unsigned long)rdev->status_page);
713 c4iw_pblpool_destroy(rdev);
714 c4iw_rqtpool_destroy(rdev);
715 c4iw_destroy_resource(&rdev->resource);
718 static void c4iw_dealloc(struct uld_ctx *ctx)
720 c4iw_rdev_close(&ctx->dev->rdev);
721 idr_destroy(&ctx->dev->cqidr);
722 idr_destroy(&ctx->dev->qpidr);
723 idr_destroy(&ctx->dev->mmidr);
724 idr_destroy(&ctx->dev->hwtid_idr);
725 idr_destroy(&ctx->dev->stid_idr);
726 idr_destroy(&ctx->dev->atid_idr);
727 if (ctx->dev->rdev.bar2_kva)
728 iounmap(ctx->dev->rdev.bar2_kva);
729 if (ctx->dev->rdev.oc_mw_kva)
730 iounmap(ctx->dev->rdev.oc_mw_kva);
731 ib_dealloc_device(&ctx->dev->ibdev);
732 iwpm_exit(RDMA_NL_C4IW);
736 static void c4iw_remove(struct uld_ctx *ctx)
738 PDBG("%s c4iw_dev %p\n", __func__, ctx->dev);
739 c4iw_unregister_device(ctx->dev);
743 static int rdma_supported(const struct cxgb4_lld_info *infop)
745 return infop->vr->stag.size > 0 && infop->vr->pbl.size > 0 &&
746 infop->vr->rq.size > 0 && infop->vr->qp.size > 0 &&
747 infop->vr->cq.size > 0;
750 static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop)
752 struct c4iw_dev *devp;
755 if (!rdma_supported(infop)) {
756 printk(KERN_INFO MOD "%s: RDMA not supported on this device.\n",
757 pci_name(infop->pdev));
758 return ERR_PTR(-ENOSYS);
760 if (!ocqp_supported(infop))
761 pr_info("%s: On-Chip Queues not supported on this device.\n",
762 pci_name(infop->pdev));
764 devp = (struct c4iw_dev *)ib_alloc_device(sizeof(*devp));
766 printk(KERN_ERR MOD "Cannot allocate ib device\n");
767 return ERR_PTR(-ENOMEM);
769 devp->rdev.lldi = *infop;
772 * For T5 devices, we map all of BAR2 with WC.
773 * For T4 devices with onchip qp mem, we map only that part
776 devp->rdev.bar2_pa = pci_resource_start(devp->rdev.lldi.pdev, 2);
777 if (is_t5(devp->rdev.lldi.adapter_type)) {
778 devp->rdev.bar2_kva = ioremap_wc(devp->rdev.bar2_pa,
779 pci_resource_len(devp->rdev.lldi.pdev, 2));
780 if (!devp->rdev.bar2_kva) {
781 pr_err(MOD "Unable to ioremap BAR2\n");
782 ib_dealloc_device(&devp->ibdev);
783 return ERR_PTR(-EINVAL);
785 } else if (ocqp_supported(infop)) {
786 devp->rdev.oc_mw_pa =
787 pci_resource_start(devp->rdev.lldi.pdev, 2) +
788 pci_resource_len(devp->rdev.lldi.pdev, 2) -
789 roundup_pow_of_two(devp->rdev.lldi.vr->ocq.size);
790 devp->rdev.oc_mw_kva = ioremap_wc(devp->rdev.oc_mw_pa,
791 devp->rdev.lldi.vr->ocq.size);
792 if (!devp->rdev.oc_mw_kva) {
793 pr_err(MOD "Unable to ioremap onchip mem\n");
794 ib_dealloc_device(&devp->ibdev);
795 return ERR_PTR(-EINVAL);
799 PDBG(KERN_INFO MOD "ocq memory: "
800 "hw_start 0x%x size %u mw_pa 0x%lx mw_kva %p\n",
801 devp->rdev.lldi.vr->ocq.start, devp->rdev.lldi.vr->ocq.size,
802 devp->rdev.oc_mw_pa, devp->rdev.oc_mw_kva);
804 ret = c4iw_rdev_open(&devp->rdev);
806 printk(KERN_ERR MOD "Unable to open CXIO rdev err %d\n", ret);
807 ib_dealloc_device(&devp->ibdev);
811 idr_init(&devp->cqidr);
812 idr_init(&devp->qpidr);
813 idr_init(&devp->mmidr);
814 idr_init(&devp->hwtid_idr);
815 idr_init(&devp->stid_idr);
816 idr_init(&devp->atid_idr);
817 spin_lock_init(&devp->lock);
818 mutex_init(&devp->rdev.stats.lock);
819 mutex_init(&devp->db_mutex);
820 INIT_LIST_HEAD(&devp->db_fc_list);
822 if (c4iw_debugfs_root) {
823 devp->debugfs_root = debugfs_create_dir(
824 pci_name(devp->rdev.lldi.pdev),
829 ret = iwpm_init(RDMA_NL_C4IW);
831 pr_err("port mapper initialization failed with %d\n", ret);
832 ib_dealloc_device(&devp->ibdev);
839 static void *c4iw_uld_add(const struct cxgb4_lld_info *infop)
842 static int vers_printed;
846 pr_info("Chelsio T4/T5 RDMA Driver - version %s\n",
849 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
851 ctx = ERR_PTR(-ENOMEM);
856 PDBG("%s found device %s nchan %u nrxq %u ntxq %u nports %u\n",
857 __func__, pci_name(ctx->lldi.pdev),
858 ctx->lldi.nchan, ctx->lldi.nrxq,
859 ctx->lldi.ntxq, ctx->lldi.nports);
861 mutex_lock(&dev_mutex);
862 list_add_tail(&ctx->entry, &uld_ctx_list);
863 mutex_unlock(&dev_mutex);
865 for (i = 0; i < ctx->lldi.nrxq; i++)
866 PDBG("rxqid[%u] %u\n", i, ctx->lldi.rxq_ids[i]);
871 static inline struct sk_buff *copy_gl_to_skb_pkt(const struct pkt_gl *gl,
878 * Allocate space for cpl_pass_accept_req which will be synthesized by
879 * driver. Once the driver synthesizes the request the skb will go
880 * through the regular cpl_pass_accept_req processing.
881 * The math here assumes sizeof cpl_pass_accept_req >= sizeof
884 skb = alloc_skb(gl->tot_len + sizeof(struct cpl_pass_accept_req) +
885 sizeof(struct rss_header) - pktshift, GFP_ATOMIC);
889 __skb_put(skb, gl->tot_len + sizeof(struct cpl_pass_accept_req) +
890 sizeof(struct rss_header) - pktshift);
893 * This skb will contain:
894 * rss_header from the rspq descriptor (1 flit)
895 * cpl_rx_pkt struct from the rspq descriptor (2 flits)
896 * space for the difference between the size of an
897 * rx_pkt and pass_accept_req cpl (1 flit)
898 * the packet data from the gl
900 skb_copy_to_linear_data(skb, rsp, sizeof(struct cpl_pass_accept_req) +
901 sizeof(struct rss_header));
902 skb_copy_to_linear_data_offset(skb, sizeof(struct rss_header) +
903 sizeof(struct cpl_pass_accept_req),
905 gl->tot_len - pktshift);
909 static inline int recv_rx_pkt(struct c4iw_dev *dev, const struct pkt_gl *gl,
912 unsigned int opcode = *(u8 *)rsp;
915 if (opcode != CPL_RX_PKT)
918 skb = copy_gl_to_skb_pkt(gl , rsp, dev->rdev.lldi.sge_pktshift);
922 if (c4iw_handlers[opcode] == NULL) {
923 pr_info("%s no handler opcode 0x%x...\n", __func__,
928 c4iw_handlers[opcode](dev, skb);
934 static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp,
935 const struct pkt_gl *gl)
937 struct uld_ctx *ctx = handle;
938 struct c4iw_dev *dev = ctx->dev;
943 /* omit RSS and rsp_ctrl at end of descriptor */
944 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
946 skb = alloc_skb(256, GFP_ATOMIC);
950 skb_copy_to_linear_data(skb, &rsp[1], len);
951 } else if (gl == CXGB4_MSG_AN) {
952 const struct rsp_ctrl *rc = (void *)rsp;
954 u32 qid = be32_to_cpu(rc->pldbuflen_qid);
955 c4iw_ev_handler(dev, qid);
957 } else if (unlikely(*(u8 *)rsp != *(u8 *)gl->va)) {
958 if (recv_rx_pkt(dev, gl, rsp))
961 pr_info("%s: unexpected FL contents at %p, " \
962 "RSS %#llx, FL %#llx, len %u\n",
963 pci_name(ctx->lldi.pdev), gl->va,
964 (unsigned long long)be64_to_cpu(*rsp),
965 (unsigned long long)be64_to_cpu(
966 *(__force __be64 *)gl->va),
971 skb = cxgb4_pktgl_to_skb(gl, 128, 128);
977 if (c4iw_handlers[opcode]) {
978 c4iw_handlers[opcode](dev, skb);
980 pr_info("%s no handler opcode 0x%x...\n", __func__,
990 static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state)
992 struct uld_ctx *ctx = handle;
994 PDBG("%s new_state %u\n", __func__, new_state);
997 printk(KERN_INFO MOD "%s: Up\n", pci_name(ctx->lldi.pdev));
1001 ctx->dev = c4iw_alloc(&ctx->lldi);
1002 if (IS_ERR(ctx->dev)) {
1004 "%s: initialization failed: %ld\n",
1005 pci_name(ctx->lldi.pdev),
1010 ret = c4iw_register_device(ctx->dev);
1013 "%s: RDMA registration failed: %d\n",
1014 pci_name(ctx->lldi.pdev), ret);
1019 case CXGB4_STATE_DOWN:
1020 printk(KERN_INFO MOD "%s: Down\n",
1021 pci_name(ctx->lldi.pdev));
1025 case CXGB4_STATE_START_RECOVERY:
1026 printk(KERN_INFO MOD "%s: Fatal Error\n",
1027 pci_name(ctx->lldi.pdev));
1029 struct ib_event event;
1031 ctx->dev->rdev.flags |= T4_FATAL_ERROR;
1032 memset(&event, 0, sizeof event);
1033 event.event = IB_EVENT_DEVICE_FATAL;
1034 event.device = &ctx->dev->ibdev;
1035 ib_dispatch_event(&event);
1039 case CXGB4_STATE_DETACH:
1040 printk(KERN_INFO MOD "%s: Detach\n",
1041 pci_name(ctx->lldi.pdev));
1049 static int disable_qp_db(int id, void *p, void *data)
1051 struct c4iw_qp *qp = p;
1053 t4_disable_wq_db(&qp->wq);
1057 static void stop_queues(struct uld_ctx *ctx)
1059 unsigned long flags;
1061 spin_lock_irqsave(&ctx->dev->lock, flags);
1062 ctx->dev->rdev.stats.db_state_transitions++;
1063 ctx->dev->db_state = STOPPED;
1064 if (ctx->dev->rdev.flags & T4_STATUS_PAGE_DISABLED)
1065 idr_for_each(&ctx->dev->qpidr, disable_qp_db, NULL);
1067 ctx->dev->rdev.status_page->db_off = 1;
1068 spin_unlock_irqrestore(&ctx->dev->lock, flags);
1071 static int enable_qp_db(int id, void *p, void *data)
1073 struct c4iw_qp *qp = p;
1075 t4_enable_wq_db(&qp->wq);
1079 static void resume_rc_qp(struct c4iw_qp *qp)
1081 spin_lock(&qp->lock);
1082 t4_ring_sq_db(&qp->wq, qp->wq.sq.wq_pidx_inc,
1083 is_t5(qp->rhp->rdev.lldi.adapter_type), NULL);
1084 qp->wq.sq.wq_pidx_inc = 0;
1085 t4_ring_rq_db(&qp->wq, qp->wq.rq.wq_pidx_inc,
1086 is_t5(qp->rhp->rdev.lldi.adapter_type), NULL);
1087 qp->wq.rq.wq_pidx_inc = 0;
1088 spin_unlock(&qp->lock);
1091 static void resume_a_chunk(struct uld_ctx *ctx)
1096 for (i = 0; i < DB_FC_RESUME_SIZE; i++) {
1097 qp = list_first_entry(&ctx->dev->db_fc_list, struct c4iw_qp,
1099 list_del_init(&qp->db_fc_entry);
1101 if (list_empty(&ctx->dev->db_fc_list))
1106 static void resume_queues(struct uld_ctx *ctx)
1108 spin_lock_irq(&ctx->dev->lock);
1109 if (ctx->dev->db_state != STOPPED)
1111 ctx->dev->db_state = FLOW_CONTROL;
1113 if (list_empty(&ctx->dev->db_fc_list)) {
1114 WARN_ON(ctx->dev->db_state != FLOW_CONTROL);
1115 ctx->dev->db_state = NORMAL;
1116 ctx->dev->rdev.stats.db_state_transitions++;
1117 if (ctx->dev->rdev.flags & T4_STATUS_PAGE_DISABLED) {
1118 idr_for_each(&ctx->dev->qpidr, enable_qp_db,
1121 ctx->dev->rdev.status_page->db_off = 0;
1125 if (cxgb4_dbfifo_count(ctx->dev->rdev.lldi.ports[0], 1)
1126 < (ctx->dev->rdev.lldi.dbfifo_int_thresh <<
1127 DB_FC_DRAIN_THRESH)) {
1128 resume_a_chunk(ctx);
1130 if (!list_empty(&ctx->dev->db_fc_list)) {
1131 spin_unlock_irq(&ctx->dev->lock);
1132 if (DB_FC_RESUME_DELAY) {
1133 set_current_state(TASK_UNINTERRUPTIBLE);
1134 schedule_timeout(DB_FC_RESUME_DELAY);
1136 spin_lock_irq(&ctx->dev->lock);
1137 if (ctx->dev->db_state != FLOW_CONTROL)
1143 if (ctx->dev->db_state != NORMAL)
1144 ctx->dev->rdev.stats.db_fc_interruptions++;
1145 spin_unlock_irq(&ctx->dev->lock);
1150 struct c4iw_qp **qps;
1153 static int add_and_ref_qp(int id, void *p, void *data)
1155 struct qp_list *qp_listp = data;
1156 struct c4iw_qp *qp = p;
1158 c4iw_qp_add_ref(&qp->ibqp);
1159 qp_listp->qps[qp_listp->idx++] = qp;
1163 static int count_qps(int id, void *p, void *data)
1165 unsigned *countp = data;
1170 static void deref_qps(struct qp_list *qp_list)
1174 for (idx = 0; idx < qp_list->idx; idx++)
1175 c4iw_qp_rem_ref(&qp_list->qps[idx]->ibqp);
1178 static void recover_lost_dbs(struct uld_ctx *ctx, struct qp_list *qp_list)
1183 for (idx = 0; idx < qp_list->idx; idx++) {
1184 struct c4iw_qp *qp = qp_list->qps[idx];
1186 spin_lock_irq(&qp->rhp->lock);
1187 spin_lock(&qp->lock);
1188 ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0],
1190 t4_sq_host_wq_pidx(&qp->wq),
1191 t4_sq_wq_size(&qp->wq));
1193 pr_err(KERN_ERR MOD "%s: Fatal error - "
1194 "DB overflow recovery failed - "
1195 "error syncing SQ qid %u\n",
1196 pci_name(ctx->lldi.pdev), qp->wq.sq.qid);
1197 spin_unlock(&qp->lock);
1198 spin_unlock_irq(&qp->rhp->lock);
1201 qp->wq.sq.wq_pidx_inc = 0;
1203 ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0],
1205 t4_rq_host_wq_pidx(&qp->wq),
1206 t4_rq_wq_size(&qp->wq));
1209 pr_err(KERN_ERR MOD "%s: Fatal error - "
1210 "DB overflow recovery failed - "
1211 "error syncing RQ qid %u\n",
1212 pci_name(ctx->lldi.pdev), qp->wq.rq.qid);
1213 spin_unlock(&qp->lock);
1214 spin_unlock_irq(&qp->rhp->lock);
1217 qp->wq.rq.wq_pidx_inc = 0;
1218 spin_unlock(&qp->lock);
1219 spin_unlock_irq(&qp->rhp->lock);
1221 /* Wait for the dbfifo to drain */
1222 while (cxgb4_dbfifo_count(qp->rhp->rdev.lldi.ports[0], 1) > 0) {
1223 set_current_state(TASK_UNINTERRUPTIBLE);
1224 schedule_timeout(usecs_to_jiffies(10));
1229 static void recover_queues(struct uld_ctx *ctx)
1232 struct qp_list qp_list;
1235 /* slow everybody down */
1236 set_current_state(TASK_UNINTERRUPTIBLE);
1237 schedule_timeout(usecs_to_jiffies(1000));
1239 /* flush the SGE contexts */
1240 ret = cxgb4_flush_eq_cache(ctx->dev->rdev.lldi.ports[0]);
1242 printk(KERN_ERR MOD "%s: Fatal error - DB overflow recovery failed\n",
1243 pci_name(ctx->lldi.pdev));
1247 /* Count active queues so we can build a list of queues to recover */
1248 spin_lock_irq(&ctx->dev->lock);
1249 WARN_ON(ctx->dev->db_state != STOPPED);
1250 ctx->dev->db_state = RECOVERY;
1251 idr_for_each(&ctx->dev->qpidr, count_qps, &count);
1253 qp_list.qps = kzalloc(count * sizeof *qp_list.qps, GFP_ATOMIC);
1255 printk(KERN_ERR MOD "%s: Fatal error - DB overflow recovery failed\n",
1256 pci_name(ctx->lldi.pdev));
1257 spin_unlock_irq(&ctx->dev->lock);
1262 /* add and ref each qp so it doesn't get freed */
1263 idr_for_each(&ctx->dev->qpidr, add_and_ref_qp, &qp_list);
1265 spin_unlock_irq(&ctx->dev->lock);
1267 /* now traverse the list in a safe context to recover the db state*/
1268 recover_lost_dbs(ctx, &qp_list);
1270 /* we're almost done! deref the qps and clean up */
1271 deref_qps(&qp_list);
1274 spin_lock_irq(&ctx->dev->lock);
1275 WARN_ON(ctx->dev->db_state != RECOVERY);
1276 ctx->dev->db_state = STOPPED;
1277 spin_unlock_irq(&ctx->dev->lock);
1280 static int c4iw_uld_control(void *handle, enum cxgb4_control control, ...)
1282 struct uld_ctx *ctx = handle;
1285 case CXGB4_CONTROL_DB_FULL:
1287 ctx->dev->rdev.stats.db_full++;
1289 case CXGB4_CONTROL_DB_EMPTY:
1291 mutex_lock(&ctx->dev->rdev.stats.lock);
1292 ctx->dev->rdev.stats.db_empty++;
1293 mutex_unlock(&ctx->dev->rdev.stats.lock);
1295 case CXGB4_CONTROL_DB_DROP:
1296 recover_queues(ctx);
1297 mutex_lock(&ctx->dev->rdev.stats.lock);
1298 ctx->dev->rdev.stats.db_drop++;
1299 mutex_unlock(&ctx->dev->rdev.stats.lock);
1302 printk(KERN_WARNING MOD "%s: unknown control cmd %u\n",
1303 pci_name(ctx->lldi.pdev), control);
1309 static struct cxgb4_uld_info c4iw_uld_info = {
1311 .add = c4iw_uld_add,
1312 .rx_handler = c4iw_uld_rx_handler,
1313 .state_change = c4iw_uld_state_change,
1314 .control = c4iw_uld_control,
1317 static int __init c4iw_init_module(void)
1321 err = c4iw_cm_init();
1325 c4iw_debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
1326 if (!c4iw_debugfs_root)
1327 printk(KERN_WARNING MOD
1328 "could not create debugfs entry, continuing\n");
1330 if (ibnl_add_client(RDMA_NL_C4IW, RDMA_NL_IWPM_NUM_OPS,
1332 pr_err("%s[%u]: Failed to add netlink callback\n"
1333 , __func__, __LINE__);
1335 cxgb4_register_uld(CXGB4_ULD_RDMA, &c4iw_uld_info);
1340 static void __exit c4iw_exit_module(void)
1342 struct uld_ctx *ctx, *tmp;
1344 mutex_lock(&dev_mutex);
1345 list_for_each_entry_safe(ctx, tmp, &uld_ctx_list, entry) {
1350 mutex_unlock(&dev_mutex);
1351 cxgb4_unregister_uld(CXGB4_ULD_RDMA);
1352 ibnl_remove_client(RDMA_NL_C4IW);
1354 debugfs_remove_recursive(c4iw_debugfs_root);
1357 module_init(c4iw_init_module);
1358 module_exit(c4iw_exit_module);