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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
44MODULE_AUTHOR("Steve Wise");
45MODULE_DESCRIPTION("Chelsio T4/T5 RDMA Driver");
46MODULE_LICENSE("Dual BSD/GPL");
47MODULE_VERSION(DRV_VERSION);
48
49static int allow_db_fc_on_t5;
50module_param(allow_db_fc_on_t5, int, 0644);
51MODULE_PARM_DESC(allow_db_fc_on_t5,
52 "Allow DB Flow Control on T5 (default = 0)");
53
54static int allow_db_coalescing_on_t5;
55module_param(allow_db_coalescing_on_t5, int, 0644);
56MODULE_PARM_DESC(allow_db_coalescing_on_t5,
57 "Allow DB Coalescing on T5 (default = 0)");
58
59int c4iw_wr_log = 0;
60module_param(c4iw_wr_log, int, 0444);
61MODULE_PARM_DESC(c4iw_wr_log, "Enables logging of work request timing data.");
62
63static int c4iw_wr_log_size_order = 12;
64module_param(c4iw_wr_log_size_order, int, 0444);
65MODULE_PARM_DESC(c4iw_wr_log_size_order,
66 "Number of entries (log2) in the work request timing log.");
67
68struct uld_ctx {
69 struct list_head entry;
70 struct cxgb4_lld_info lldi;
71 struct c4iw_dev *dev;
72};
73
74static LIST_HEAD(uld_ctx_list);
75static DEFINE_MUTEX(dev_mutex);
76
77#define DB_FC_RESUME_SIZE 64
78#define DB_FC_RESUME_DELAY 1
79#define DB_FC_DRAIN_THRESH 0
80
81static struct dentry *c4iw_debugfs_root;
82
83struct c4iw_debugfs_data {
84 struct c4iw_dev *devp;
85 char *buf;
86 int bufsize;
87 int pos;
88};
89
90
91static struct ibnl_client_cbs c4iw_nl_cb_table[] = {
92 [RDMA_NL_IWPM_REG_PID] = {.dump = iwpm_register_pid_cb},
93 [RDMA_NL_IWPM_ADD_MAPPING] = {.dump = iwpm_add_mapping_cb},
94 [RDMA_NL_IWPM_QUERY_MAPPING] = {.dump = iwpm_add_and_query_mapping_cb},
95 [RDMA_NL_IWPM_HANDLE_ERR] = {.dump = iwpm_mapping_error_cb},
96 [RDMA_NL_IWPM_REMOTE_INFO] = {.dump = iwpm_remote_info_cb},
97 [RDMA_NL_IWPM_MAPINFO] = {.dump = iwpm_mapping_info_cb},
98 [RDMA_NL_IWPM_MAPINFO_NUM] = {.dump = iwpm_ack_mapping_info_cb}
99};
100
101static int count_idrs(int id, void *p, void *data)
102{
103 int *countp = data;
104
105 *countp = *countp + 1;
106 return 0;
107}
108
109static ssize_t debugfs_read(struct file *file, char __user *buf, size_t count,
110 loff_t *ppos)
111{
112 struct c4iw_debugfs_data *d = file->private_data;
113
114 return simple_read_from_buffer(buf, count, ppos, d->buf, d->pos);
115}
116
117void c4iw_log_wr_stats(struct t4_wq *wq, struct t4_cqe *cqe)
118{
119 struct wr_log_entry le;
120 int idx;
121
122 if (!wq->rdev->wr_log)
123 return;
124
125 idx = (atomic_inc_return(&wq->rdev->wr_log_idx) - 1) &
126 (wq->rdev->wr_log_size - 1);
127 le.poll_sge_ts = cxgb4_read_sge_timestamp(wq->rdev->lldi.ports[0]);
128 getnstimeofday(&le.poll_host_ts);
129 le.valid = 1;
130 le.cqe_sge_ts = CQE_TS(cqe);
131 if (SQ_TYPE(cqe)) {
132 le.qid = wq->sq.qid;
133 le.opcode = CQE_OPCODE(cqe);
134 le.post_host_ts = wq->sq.sw_sq[wq->sq.cidx].host_ts;
135 le.post_sge_ts = wq->sq.sw_sq[wq->sq.cidx].sge_ts;
136 le.wr_id = CQE_WRID_SQ_IDX(cqe);
137 } else {
138 le.qid = wq->rq.qid;
139 le.opcode = FW_RI_RECEIVE;
140 le.post_host_ts = wq->rq.sw_rq[wq->rq.cidx].host_ts;
141 le.post_sge_ts = wq->rq.sw_rq[wq->rq.cidx].sge_ts;
142 le.wr_id = CQE_WRID_MSN(cqe);
143 }
144 wq->rdev->wr_log[idx] = le;
145}
146
147static int wr_log_show(struct seq_file *seq, void *v)
148{
149 struct c4iw_dev *dev = seq->private;
150 struct timespec prev_ts = {0, 0};
151 struct wr_log_entry *lep;
152 int prev_ts_set = 0;
153 int idx, end;
154
155#define ts2ns(ts) div64_u64((ts) * dev->rdev.lldi.cclk_ps, 1000)
156
157 idx = atomic_read(&dev->rdev.wr_log_idx) &
158 (dev->rdev.wr_log_size - 1);
159 end = idx - 1;
160 if (end < 0)
161 end = dev->rdev.wr_log_size - 1;
162 lep = &dev->rdev.wr_log[idx];
163 while (idx != end) {
164 if (lep->valid) {
165 if (!prev_ts_set) {
166 prev_ts_set = 1;
167 prev_ts = lep->poll_host_ts;
168 }
169 seq_printf(seq, "%04u: sec %lu nsec %lu qid %u opcode "
170 "%u %s 0x%x host_wr_delta sec %lu nsec %lu "
171 "post_sge_ts 0x%llx cqe_sge_ts 0x%llx "
172 "poll_sge_ts 0x%llx post_poll_delta_ns %llu "
173 "cqe_poll_delta_ns %llu\n",
174 idx,
175 timespec_sub(lep->poll_host_ts,
176 prev_ts).tv_sec,
177 timespec_sub(lep->poll_host_ts,
178 prev_ts).tv_nsec,
179 lep->qid, lep->opcode,
180 lep->opcode == FW_RI_RECEIVE ?
181 "msn" : "wrid",
182 lep->wr_id,
183 timespec_sub(lep->poll_host_ts,
184 lep->post_host_ts).tv_sec,
185 timespec_sub(lep->poll_host_ts,
186 lep->post_host_ts).tv_nsec,
187 lep->post_sge_ts, lep->cqe_sge_ts,
188 lep->poll_sge_ts,
189 ts2ns(lep->poll_sge_ts - lep->post_sge_ts),
190 ts2ns(lep->poll_sge_ts - lep->cqe_sge_ts));
191 prev_ts = lep->poll_host_ts;
192 }
193 idx++;
194 if (idx > (dev->rdev.wr_log_size - 1))
195 idx = 0;
196 lep = &dev->rdev.wr_log[idx];
197 }
198#undef ts2ns
199 return 0;
200}
201
202static int wr_log_open(struct inode *inode, struct file *file)
203{
204 return single_open(file, wr_log_show, inode->i_private);
205}
206
207static ssize_t wr_log_clear(struct file *file, const char __user *buf,
208 size_t count, loff_t *pos)
209{
210 struct c4iw_dev *dev = ((struct seq_file *)file->private_data)->private;
211 int i;
212
213 if (dev->rdev.wr_log)
214 for (i = 0; i < dev->rdev.wr_log_size; i++)
215 dev->rdev.wr_log[i].valid = 0;
216 return count;
217}
218
219static const struct file_operations wr_log_debugfs_fops = {
220 .owner = THIS_MODULE,
221 .open = wr_log_open,
222 .release = single_release,
223 .read = seq_read,
224 .llseek = seq_lseek,
225 .write = wr_log_clear,
226};
227
228static int dump_qp(int id, void *p, void *data)
229{
230 struct c4iw_qp *qp = p;
231 struct c4iw_debugfs_data *qpd = data;
232 int space;
233 int cc;
234
235 if (id != qp->wq.sq.qid)
236 return 0;
237
238 space = qpd->bufsize - qpd->pos - 1;
239 if (space == 0)
240 return 1;
241
242 if (qp->ep) {
243 if (qp->ep->com.local_addr.ss_family == AF_INET) {
244 struct sockaddr_in *lsin = (struct sockaddr_in *)
245 &qp->ep->com.local_addr;
246 struct sockaddr_in *rsin = (struct sockaddr_in *)
247 &qp->ep->com.remote_addr;
248 struct sockaddr_in *mapped_lsin = (struct sockaddr_in *)
249 &qp->ep->com.mapped_local_addr;
250 struct sockaddr_in *mapped_rsin = (struct sockaddr_in *)
251 &qp->ep->com.mapped_remote_addr;
252
253 cc = snprintf(qpd->buf + qpd->pos, space,
254 "rc qp sq id %u rq id %u state %u "
255 "onchip %u ep tid %u state %u "
256 "%pI4:%u/%u->%pI4:%u/%u\n",
257 qp->wq.sq.qid, qp->wq.rq.qid,
258 (int)qp->attr.state,
259 qp->wq.sq.flags & T4_SQ_ONCHIP,
260 qp->ep->hwtid, (int)qp->ep->com.state,
261 &lsin->sin_addr, ntohs(lsin->sin_port),
262 ntohs(mapped_lsin->sin_port),
263 &rsin->sin_addr, ntohs(rsin->sin_port),
264 ntohs(mapped_rsin->sin_port));
265 } else {
266 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)
267 &qp->ep->com.local_addr;
268 struct sockaddr_in6 *rsin6 = (struct sockaddr_in6 *)
269 &qp->ep->com.remote_addr;
270 struct sockaddr_in6 *mapped_lsin6 =
271 (struct sockaddr_in6 *)
272 &qp->ep->com.mapped_local_addr;
273 struct sockaddr_in6 *mapped_rsin6 =
274 (struct sockaddr_in6 *)
275 &qp->ep->com.mapped_remote_addr;
276
277 cc = snprintf(qpd->buf + qpd->pos, space,
278 "rc qp sq id %u rq id %u state %u "
279 "onchip %u ep tid %u state %u "
280 "%pI6:%u/%u->%pI6:%u/%u\n",
281 qp->wq.sq.qid, qp->wq.rq.qid,
282 (int)qp->attr.state,
283 qp->wq.sq.flags & T4_SQ_ONCHIP,
284 qp->ep->hwtid, (int)qp->ep->com.state,
285 &lsin6->sin6_addr,
286 ntohs(lsin6->sin6_port),
287 ntohs(mapped_lsin6->sin6_port),
288 &rsin6->sin6_addr,
289 ntohs(rsin6->sin6_port),
290 ntohs(mapped_rsin6->sin6_port));
291 }
292 } else
293 cc = snprintf(qpd->buf + qpd->pos, space,
294 "qp sq id %u rq id %u state %u onchip %u\n",
295 qp->wq.sq.qid, qp->wq.rq.qid,
296 (int)qp->attr.state,
297 qp->wq.sq.flags & T4_SQ_ONCHIP);
298 if (cc < space)
299 qpd->pos += cc;
300 return 0;
301}
302
303static int qp_release(struct inode *inode, struct file *file)
304{
305 struct c4iw_debugfs_data *qpd = file->private_data;
306 if (!qpd) {
307 printk(KERN_INFO "%s null qpd?\n", __func__);
308 return 0;
309 }
310 vfree(qpd->buf);
311 kfree(qpd);
312 return 0;
313}
314
315static int qp_open(struct inode *inode, struct file *file)
316{
317 struct c4iw_debugfs_data *qpd;
318 int ret = 0;
319 int count = 1;
320
321 qpd = kmalloc(sizeof *qpd, GFP_KERNEL);
322 if (!qpd) {
323 ret = -ENOMEM;
324 goto out;
325 }
326 qpd->devp = inode->i_private;
327 qpd->pos = 0;
328
329 spin_lock_irq(&qpd->devp->lock);
330 idr_for_each(&qpd->devp->qpidr, count_idrs, &count);
331 spin_unlock_irq(&qpd->devp->lock);
332
333 qpd->bufsize = count * 128;
334 qpd->buf = vmalloc(qpd->bufsize);
335 if (!qpd->buf) {
336 ret = -ENOMEM;
337 goto err1;
338 }
339
340 spin_lock_irq(&qpd->devp->lock);
341 idr_for_each(&qpd->devp->qpidr, dump_qp, qpd);
342 spin_unlock_irq(&qpd->devp->lock);
343
344 qpd->buf[qpd->pos++] = 0;
345 file->private_data = qpd;
346 goto out;
347err1:
348 kfree(qpd);
349out:
350 return ret;
351}
352
353static const struct file_operations qp_debugfs_fops = {
354 .owner = THIS_MODULE,
355 .open = qp_open,
356 .release = qp_release,
357 .read = debugfs_read,
358 .llseek = default_llseek,
359};
360
361static int dump_stag(int id, void *p, void *data)
362{
363 struct c4iw_debugfs_data *stagd = data;
364 int space;
365 int cc;
366 struct fw_ri_tpte tpte;
367 int ret;
368
369 space = stagd->bufsize - stagd->pos - 1;
370 if (space == 0)
371 return 1;
372
373 ret = cxgb4_read_tpte(stagd->devp->rdev.lldi.ports[0], (u32)id<<8,
374 (__be32 *)&tpte);
375 if (ret) {
376 dev_err(&stagd->devp->rdev.lldi.pdev->dev,
377 "%s cxgb4_read_tpte err %d\n", __func__, ret);
378 return ret;
379 }
380 cc = snprintf(stagd->buf + stagd->pos, space,
381 "stag: idx 0x%x valid %d key 0x%x state %d pdid %d "
382 "perm 0x%x ps %d len 0x%llx va 0x%llx\n",
383 (u32)id<<8,
384 FW_RI_TPTE_VALID_G(ntohl(tpte.valid_to_pdid)),
385 FW_RI_TPTE_STAGKEY_G(ntohl(tpte.valid_to_pdid)),
386 FW_RI_TPTE_STAGSTATE_G(ntohl(tpte.valid_to_pdid)),
387 FW_RI_TPTE_PDID_G(ntohl(tpte.valid_to_pdid)),
388 FW_RI_TPTE_PERM_G(ntohl(tpte.locread_to_qpid)),
389 FW_RI_TPTE_PS_G(ntohl(tpte.locread_to_qpid)),
390 ((u64)ntohl(tpte.len_hi) << 32) | ntohl(tpte.len_lo),
391 ((u64)ntohl(tpte.va_hi) << 32) | ntohl(tpte.va_lo_fbo));
392 if (cc < space)
393 stagd->pos += cc;
394 return 0;
395}
396
397static int stag_release(struct inode *inode, struct file *file)
398{
399 struct c4iw_debugfs_data *stagd = file->private_data;
400 if (!stagd) {
401 printk(KERN_INFO "%s null stagd?\n", __func__);
402 return 0;
403 }
404 vfree(stagd->buf);
405 kfree(stagd);
406 return 0;
407}
408
409static int stag_open(struct inode *inode, struct file *file)
410{
411 struct c4iw_debugfs_data *stagd;
412 int ret = 0;
413 int count = 1;
414
415 stagd = kmalloc(sizeof *stagd, GFP_KERNEL);
416 if (!stagd) {
417 ret = -ENOMEM;
418 goto out;
419 }
420 stagd->devp = inode->i_private;
421 stagd->pos = 0;
422
423 spin_lock_irq(&stagd->devp->lock);
424 idr_for_each(&stagd->devp->mmidr, count_idrs, &count);
425 spin_unlock_irq(&stagd->devp->lock);
426
427 stagd->bufsize = count * 256;
428 stagd->buf = vmalloc(stagd->bufsize);
429 if (!stagd->buf) {
430 ret = -ENOMEM;
431 goto err1;
432 }
433
434 spin_lock_irq(&stagd->devp->lock);
435 idr_for_each(&stagd->devp->mmidr, dump_stag, stagd);
436 spin_unlock_irq(&stagd->devp->lock);
437
438 stagd->buf[stagd->pos++] = 0;
439 file->private_data = stagd;
440 goto out;
441err1:
442 kfree(stagd);
443out:
444 return ret;
445}
446
447static const struct file_operations stag_debugfs_fops = {
448 .owner = THIS_MODULE,
449 .open = stag_open,
450 .release = stag_release,
451 .read = debugfs_read,
452 .llseek = default_llseek,
453};
454
455static char *db_state_str[] = {"NORMAL", "FLOW_CONTROL", "RECOVERY", "STOPPED"};
456
457static int stats_show(struct seq_file *seq, void *v)
458{
459 struct c4iw_dev *dev = seq->private;
460
461 seq_printf(seq, " Object: %10s %10s %10s %10s\n", "Total", "Current",
462 "Max", "Fail");
463 seq_printf(seq, " PDID: %10llu %10llu %10llu %10llu\n",
464 dev->rdev.stats.pd.total, dev->rdev.stats.pd.cur,
465 dev->rdev.stats.pd.max, dev->rdev.stats.pd.fail);
466 seq_printf(seq, " QID: %10llu %10llu %10llu %10llu\n",
467 dev->rdev.stats.qid.total, dev->rdev.stats.qid.cur,
468 dev->rdev.stats.qid.max, dev->rdev.stats.qid.fail);
469 seq_printf(seq, " TPTMEM: %10llu %10llu %10llu %10llu\n",
470 dev->rdev.stats.stag.total, dev->rdev.stats.stag.cur,
471 dev->rdev.stats.stag.max, dev->rdev.stats.stag.fail);
472 seq_printf(seq, " PBLMEM: %10llu %10llu %10llu %10llu\n",
473 dev->rdev.stats.pbl.total, dev->rdev.stats.pbl.cur,
474 dev->rdev.stats.pbl.max, dev->rdev.stats.pbl.fail);
475 seq_printf(seq, " RQTMEM: %10llu %10llu %10llu %10llu\n",
476 dev->rdev.stats.rqt.total, dev->rdev.stats.rqt.cur,
477 dev->rdev.stats.rqt.max, dev->rdev.stats.rqt.fail);
478 seq_printf(seq, " OCQPMEM: %10llu %10llu %10llu %10llu\n",
479 dev->rdev.stats.ocqp.total, dev->rdev.stats.ocqp.cur,
480 dev->rdev.stats.ocqp.max, dev->rdev.stats.ocqp.fail);
481 seq_printf(seq, " DB FULL: %10llu\n", dev->rdev.stats.db_full);
482 seq_printf(seq, " DB EMPTY: %10llu\n", dev->rdev.stats.db_empty);
483 seq_printf(seq, " DB DROP: %10llu\n", dev->rdev.stats.db_drop);
484 seq_printf(seq, " DB State: %s Transitions %llu FC Interruptions %llu\n",
485 db_state_str[dev->db_state],
486 dev->rdev.stats.db_state_transitions,
487 dev->rdev.stats.db_fc_interruptions);
488 seq_printf(seq, "TCAM_FULL: %10llu\n", dev->rdev.stats.tcam_full);
489 seq_printf(seq, "ACT_OFLD_CONN_FAILS: %10llu\n",
490 dev->rdev.stats.act_ofld_conn_fails);
491 seq_printf(seq, "PAS_OFLD_CONN_FAILS: %10llu\n",
492 dev->rdev.stats.pas_ofld_conn_fails);
493 seq_printf(seq, "NEG_ADV_RCVD: %10llu\n", dev->rdev.stats.neg_adv);
494 seq_printf(seq, "AVAILABLE IRD: %10u\n", dev->avail_ird);
495 return 0;
496}
497
498static int stats_open(struct inode *inode, struct file *file)
499{
500 return single_open(file, stats_show, inode->i_private);
501}
502
503static ssize_t stats_clear(struct file *file, const char __user *buf,
504 size_t count, loff_t *pos)
505{
506 struct c4iw_dev *dev = ((struct seq_file *)file->private_data)->private;
507
508 mutex_lock(&dev->rdev.stats.lock);
509 dev->rdev.stats.pd.max = 0;
510 dev->rdev.stats.pd.fail = 0;
511 dev->rdev.stats.qid.max = 0;
512 dev->rdev.stats.qid.fail = 0;
513 dev->rdev.stats.stag.max = 0;
514 dev->rdev.stats.stag.fail = 0;
515 dev->rdev.stats.pbl.max = 0;
516 dev->rdev.stats.pbl.fail = 0;
517 dev->rdev.stats.rqt.max = 0;
518 dev->rdev.stats.rqt.fail = 0;
519 dev->rdev.stats.ocqp.max = 0;
520 dev->rdev.stats.ocqp.fail = 0;
521 dev->rdev.stats.db_full = 0;
522 dev->rdev.stats.db_empty = 0;
523 dev->rdev.stats.db_drop = 0;
524 dev->rdev.stats.db_state_transitions = 0;
525 dev->rdev.stats.tcam_full = 0;
526 dev->rdev.stats.act_ofld_conn_fails = 0;
527 dev->rdev.stats.pas_ofld_conn_fails = 0;
528 mutex_unlock(&dev->rdev.stats.lock);
529 return count;
530}
531
532static const struct file_operations stats_debugfs_fops = {
533 .owner = THIS_MODULE,
534 .open = stats_open,
535 .release = single_release,
536 .read = seq_read,
537 .llseek = seq_lseek,
538 .write = stats_clear,
539};
540
541static int dump_ep(int id, void *p, void *data)
542{
543 struct c4iw_ep *ep = p;
544 struct c4iw_debugfs_data *epd = data;
545 int space;
546 int cc;
547
548 space = epd->bufsize - epd->pos - 1;
549 if (space == 0)
550 return 1;
551
552 if (ep->com.local_addr.ss_family == AF_INET) {
553 struct sockaddr_in *lsin = (struct sockaddr_in *)
554 &ep->com.local_addr;
555 struct sockaddr_in *rsin = (struct sockaddr_in *)
556 &ep->com.remote_addr;
557 struct sockaddr_in *mapped_lsin = (struct sockaddr_in *)
558 &ep->com.mapped_local_addr;
559 struct sockaddr_in *mapped_rsin = (struct sockaddr_in *)
560 &ep->com.mapped_remote_addr;
561
562 cc = snprintf(epd->buf + epd->pos, space,
563 "ep %p cm_id %p qp %p state %d flags 0x%lx "
564 "history 0x%lx hwtid %d atid %d "
565 "conn_na %u abort_na %u "
566 "%pI4:%d/%d <-> %pI4:%d/%d\n",
567 ep, ep->com.cm_id, ep->com.qp,
568 (int)ep->com.state, ep->com.flags,
569 ep->com.history, ep->hwtid, ep->atid,
570 ep->stats.connect_neg_adv,
571 ep->stats.abort_neg_adv,
572 &lsin->sin_addr, ntohs(lsin->sin_port),
573 ntohs(mapped_lsin->sin_port),
574 &rsin->sin_addr, ntohs(rsin->sin_port),
575 ntohs(mapped_rsin->sin_port));
576 } else {
577 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)
578 &ep->com.local_addr;
579 struct sockaddr_in6 *rsin6 = (struct sockaddr_in6 *)
580 &ep->com.remote_addr;
581 struct sockaddr_in6 *mapped_lsin6 = (struct sockaddr_in6 *)
582 &ep->com.mapped_local_addr;
583 struct sockaddr_in6 *mapped_rsin6 = (struct sockaddr_in6 *)
584 &ep->com.mapped_remote_addr;
585
586 cc = snprintf(epd->buf + epd->pos, space,
587 "ep %p cm_id %p qp %p state %d flags 0x%lx "
588 "history 0x%lx hwtid %d atid %d "
589 "conn_na %u abort_na %u "
590 "%pI6:%d/%d <-> %pI6:%d/%d\n",
591 ep, ep->com.cm_id, ep->com.qp,
592 (int)ep->com.state, ep->com.flags,
593 ep->com.history, ep->hwtid, ep->atid,
594 ep->stats.connect_neg_adv,
595 ep->stats.abort_neg_adv,
596 &lsin6->sin6_addr, ntohs(lsin6->sin6_port),
597 ntohs(mapped_lsin6->sin6_port),
598 &rsin6->sin6_addr, ntohs(rsin6->sin6_port),
599 ntohs(mapped_rsin6->sin6_port));
600 }
601 if (cc < space)
602 epd->pos += cc;
603 return 0;
604}
605
606static int dump_listen_ep(int id, void *p, void *data)
607{
608 struct c4iw_listen_ep *ep = p;
609 struct c4iw_debugfs_data *epd = data;
610 int space;
611 int cc;
612
613 space = epd->bufsize - epd->pos - 1;
614 if (space == 0)
615 return 1;
616
617 if (ep->com.local_addr.ss_family == AF_INET) {
618 struct sockaddr_in *lsin = (struct sockaddr_in *)
619 &ep->com.local_addr;
620 struct sockaddr_in *mapped_lsin = (struct sockaddr_in *)
621 &ep->com.mapped_local_addr;
622
623 cc = snprintf(epd->buf + epd->pos, space,
624 "ep %p cm_id %p state %d flags 0x%lx stid %d "
625 "backlog %d %pI4:%d/%d\n",
626 ep, ep->com.cm_id, (int)ep->com.state,
627 ep->com.flags, ep->stid, ep->backlog,
628 &lsin->sin_addr, ntohs(lsin->sin_port),
629 ntohs(mapped_lsin->sin_port));
630 } else {
631 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)
632 &ep->com.local_addr;
633 struct sockaddr_in6 *mapped_lsin6 = (struct sockaddr_in6 *)
634 &ep->com.mapped_local_addr;
635
636 cc = snprintf(epd->buf + epd->pos, space,
637 "ep %p cm_id %p state %d flags 0x%lx stid %d "
638 "backlog %d %pI6:%d/%d\n",
639 ep, ep->com.cm_id, (int)ep->com.state,
640 ep->com.flags, ep->stid, ep->backlog,
641 &lsin6->sin6_addr, ntohs(lsin6->sin6_port),
642 ntohs(mapped_lsin6->sin6_port));
643 }
644 if (cc < space)
645 epd->pos += cc;
646 return 0;
647}
648
649static int ep_release(struct inode *inode, struct file *file)
650{
651 struct c4iw_debugfs_data *epd = file->private_data;
652 if (!epd) {
653 pr_info("%s null qpd?\n", __func__);
654 return 0;
655 }
656 vfree(epd->buf);
657 kfree(epd);
658 return 0;
659}
660
661static int ep_open(struct inode *inode, struct file *file)
662{
663 struct c4iw_debugfs_data *epd;
664 int ret = 0;
665 int count = 1;
666
667 epd = kmalloc(sizeof(*epd), GFP_KERNEL);
668 if (!epd) {
669 ret = -ENOMEM;
670 goto out;
671 }
672 epd->devp = inode->i_private;
673 epd->pos = 0;
674
675 spin_lock_irq(&epd->devp->lock);
676 idr_for_each(&epd->devp->hwtid_idr, count_idrs, &count);
677 idr_for_each(&epd->devp->atid_idr, count_idrs, &count);
678 idr_for_each(&epd->devp->stid_idr, count_idrs, &count);
679 spin_unlock_irq(&epd->devp->lock);
680
681 epd->bufsize = count * 240;
682 epd->buf = vmalloc(epd->bufsize);
683 if (!epd->buf) {
684 ret = -ENOMEM;
685 goto err1;
686 }
687
688 spin_lock_irq(&epd->devp->lock);
689 idr_for_each(&epd->devp->hwtid_idr, dump_ep, epd);
690 idr_for_each(&epd->devp->atid_idr, dump_ep, epd);
691 idr_for_each(&epd->devp->stid_idr, dump_listen_ep, epd);
692 spin_unlock_irq(&epd->devp->lock);
693
694 file->private_data = epd;
695 goto out;
696err1:
697 kfree(epd);
698out:
699 return ret;
700}
701
702static const struct file_operations ep_debugfs_fops = {
703 .owner = THIS_MODULE,
704 .open = ep_open,
705 .release = ep_release,
706 .read = debugfs_read,
707};
708
709static int setup_debugfs(struct c4iw_dev *devp)
710{
711 if (!devp->debugfs_root)
712 return -1;
713
714 debugfs_create_file_size("qps", S_IWUSR, devp->debugfs_root,
715 (void *)devp, &qp_debugfs_fops, 4096);
716
717 debugfs_create_file_size("stags", S_IWUSR, devp->debugfs_root,
718 (void *)devp, &stag_debugfs_fops, 4096);
719
720 debugfs_create_file_size("stats", S_IWUSR, devp->debugfs_root,
721 (void *)devp, &stats_debugfs_fops, 4096);
722
723 debugfs_create_file_size("eps", S_IWUSR, devp->debugfs_root,
724 (void *)devp, &ep_debugfs_fops, 4096);
725
726 if (c4iw_wr_log)
727 debugfs_create_file_size("wr_log", S_IWUSR, devp->debugfs_root,
728 (void *)devp, &wr_log_debugfs_fops, 4096);
729 return 0;
730}
731
732void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev,
733 struct c4iw_dev_ucontext *uctx)
734{
735 struct list_head *pos, *nxt;
736 struct c4iw_qid_list *entry;
737
738 mutex_lock(&uctx->lock);
739 list_for_each_safe(pos, nxt, &uctx->qpids) {
740 entry = list_entry(pos, struct c4iw_qid_list, entry);
741 list_del_init(&entry->entry);
742 if (!(entry->qid & rdev->qpmask)) {
743 c4iw_put_resource(&rdev->resource.qid_table,
744 entry->qid);
745 mutex_lock(&rdev->stats.lock);
746 rdev->stats.qid.cur -= rdev->qpmask + 1;
747 mutex_unlock(&rdev->stats.lock);
748 }
749 kfree(entry);
750 }
751
752 list_for_each_safe(pos, nxt, &uctx->qpids) {
753 entry = list_entry(pos, struct c4iw_qid_list, entry);
754 list_del_init(&entry->entry);
755 kfree(entry);
756 }
757 mutex_unlock(&uctx->lock);
758}
759
760void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev,
761 struct c4iw_dev_ucontext *uctx)
762{
763 INIT_LIST_HEAD(&uctx->qpids);
764 INIT_LIST_HEAD(&uctx->cqids);
765 mutex_init(&uctx->lock);
766}
767
768
769static int c4iw_rdev_open(struct c4iw_rdev *rdev)
770{
771 int err;
772
773 c4iw_init_dev_ucontext(rdev, &rdev->uctx);
774
775
776
777
778
779
780 if (rdev->lldi.udb_density != rdev->lldi.ucq_density) {
781 pr_err(MOD "%s: unsupported udb/ucq densities %u/%u\n",
782 pci_name(rdev->lldi.pdev), rdev->lldi.udb_density,
783 rdev->lldi.ucq_density);
784 err = -EINVAL;
785 goto err1;
786 }
787 if (rdev->lldi.vr->qp.start != rdev->lldi.vr->cq.start ||
788 rdev->lldi.vr->qp.size != rdev->lldi.vr->cq.size) {
789 pr_err(MOD "%s: unsupported qp and cq id ranges "
790 "qp start %u size %u cq start %u size %u\n",
791 pci_name(rdev->lldi.pdev), rdev->lldi.vr->qp.start,
792 rdev->lldi.vr->qp.size, rdev->lldi.vr->cq.size,
793 rdev->lldi.vr->cq.size);
794 err = -EINVAL;
795 goto err1;
796 }
797
798
799
800
801
802 rdev->qpshift = PAGE_SHIFT - ilog2(rdev->lldi.udb_density);
803 rdev->qpmask = rdev->lldi.udb_density - 1;
804 rdev->cqshift = PAGE_SHIFT - ilog2(rdev->lldi.ucq_density);
805 rdev->cqmask = rdev->lldi.ucq_density - 1;
806 PDBG("%s dev %s stag start 0x%0x size 0x%0x num stags %d "
807 "pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x "
808 "qp qid start %u size %u cq qid start %u size %u\n",
809 __func__, pci_name(rdev->lldi.pdev), rdev->lldi.vr->stag.start,
810 rdev->lldi.vr->stag.size, c4iw_num_stags(rdev),
811 rdev->lldi.vr->pbl.start,
812 rdev->lldi.vr->pbl.size, rdev->lldi.vr->rq.start,
813 rdev->lldi.vr->rq.size,
814 rdev->lldi.vr->qp.start,
815 rdev->lldi.vr->qp.size,
816 rdev->lldi.vr->cq.start,
817 rdev->lldi.vr->cq.size);
818 PDBG("udb len 0x%x udb base %p db_reg %p gts_reg %p qpshift %lu "
819 "qpmask 0x%x cqshift %lu cqmask 0x%x\n",
820 (unsigned)pci_resource_len(rdev->lldi.pdev, 2),
821 (void *)pci_resource_start(rdev->lldi.pdev, 2),
822 rdev->lldi.db_reg,
823 rdev->lldi.gts_reg,
824 rdev->qpshift, rdev->qpmask,
825 rdev->cqshift, rdev->cqmask);
826
827 if (c4iw_num_stags(rdev) == 0) {
828 err = -EINVAL;
829 goto err1;
830 }
831
832 rdev->stats.pd.total = T4_MAX_NUM_PD;
833 rdev->stats.stag.total = rdev->lldi.vr->stag.size;
834 rdev->stats.pbl.total = rdev->lldi.vr->pbl.size;
835 rdev->stats.rqt.total = rdev->lldi.vr->rq.size;
836 rdev->stats.ocqp.total = rdev->lldi.vr->ocq.size;
837 rdev->stats.qid.total = rdev->lldi.vr->qp.size;
838
839 err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD);
840 if (err) {
841 printk(KERN_ERR MOD "error %d initializing resources\n", err);
842 goto err1;
843 }
844 err = c4iw_pblpool_create(rdev);
845 if (err) {
846 printk(KERN_ERR MOD "error %d initializing pbl pool\n", err);
847 goto err2;
848 }
849 err = c4iw_rqtpool_create(rdev);
850 if (err) {
851 printk(KERN_ERR MOD "error %d initializing rqt pool\n", err);
852 goto err3;
853 }
854 err = c4iw_ocqp_pool_create(rdev);
855 if (err) {
856 printk(KERN_ERR MOD "error %d initializing ocqp pool\n", err);
857 goto err4;
858 }
859 rdev->status_page = (struct t4_dev_status_page *)
860 __get_free_page(GFP_KERNEL);
861 if (!rdev->status_page) {
862 pr_err(MOD "error allocating status page\n");
863 goto err4;
864 }
865
866 if (c4iw_wr_log) {
867 rdev->wr_log = kzalloc((1 << c4iw_wr_log_size_order) *
868 sizeof(*rdev->wr_log), GFP_KERNEL);
869 if (rdev->wr_log) {
870 rdev->wr_log_size = 1 << c4iw_wr_log_size_order;
871 atomic_set(&rdev->wr_log_idx, 0);
872 } else {
873 pr_err(MOD "error allocating wr_log. Logging disabled\n");
874 }
875 }
876
877 rdev->status_page->db_off = 0;
878
879 return 0;
880err4:
881 c4iw_rqtpool_destroy(rdev);
882err3:
883 c4iw_pblpool_destroy(rdev);
884err2:
885 c4iw_destroy_resource(&rdev->resource);
886err1:
887 return err;
888}
889
890static void c4iw_rdev_close(struct c4iw_rdev *rdev)
891{
892 kfree(rdev->wr_log);
893 free_page((unsigned long)rdev->status_page);
894 c4iw_pblpool_destroy(rdev);
895 c4iw_rqtpool_destroy(rdev);
896 c4iw_destroy_resource(&rdev->resource);
897}
898
899static void c4iw_dealloc(struct uld_ctx *ctx)
900{
901 c4iw_rdev_close(&ctx->dev->rdev);
902 idr_destroy(&ctx->dev->cqidr);
903 idr_destroy(&ctx->dev->qpidr);
904 idr_destroy(&ctx->dev->mmidr);
905 idr_destroy(&ctx->dev->hwtid_idr);
906 idr_destroy(&ctx->dev->stid_idr);
907 idr_destroy(&ctx->dev->atid_idr);
908 if (ctx->dev->rdev.bar2_kva)
909 iounmap(ctx->dev->rdev.bar2_kva);
910 if (ctx->dev->rdev.oc_mw_kva)
911 iounmap(ctx->dev->rdev.oc_mw_kva);
912 ib_dealloc_device(&ctx->dev->ibdev);
913 ctx->dev = NULL;
914}
915
916static void c4iw_remove(struct uld_ctx *ctx)
917{
918 PDBG("%s c4iw_dev %p\n", __func__, ctx->dev);
919 c4iw_unregister_device(ctx->dev);
920 c4iw_dealloc(ctx);
921}
922
923static int rdma_supported(const struct cxgb4_lld_info *infop)
924{
925 return infop->vr->stag.size > 0 && infop->vr->pbl.size > 0 &&
926 infop->vr->rq.size > 0 && infop->vr->qp.size > 0 &&
927 infop->vr->cq.size > 0;
928}
929
930static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop)
931{
932 struct c4iw_dev *devp;
933 int ret;
934
935 if (!rdma_supported(infop)) {
936 printk(KERN_INFO MOD "%s: RDMA not supported on this device.\n",
937 pci_name(infop->pdev));
938 return ERR_PTR(-ENOSYS);
939 }
940 if (!ocqp_supported(infop))
941 pr_info("%s: On-Chip Queues not supported on this device.\n",
942 pci_name(infop->pdev));
943
944 devp = (struct c4iw_dev *)ib_alloc_device(sizeof(*devp));
945 if (!devp) {
946 printk(KERN_ERR MOD "Cannot allocate ib device\n");
947 return ERR_PTR(-ENOMEM);
948 }
949 devp->rdev.lldi = *infop;
950
951
952 PDBG("%s: Ing. padding boundary is %d, egrsstatuspagesize = %d\n",
953 __func__, devp->rdev.lldi.sge_ingpadboundary,
954 devp->rdev.lldi.sge_egrstatuspagesize);
955
956 devp->rdev.hw_queue.t4_eq_status_entries =
957 devp->rdev.lldi.sge_ingpadboundary > 64 ? 2 : 1;
958 devp->rdev.hw_queue.t4_max_eq_size = 65520;
959 devp->rdev.hw_queue.t4_max_iq_size = 65520;
960 devp->rdev.hw_queue.t4_max_rq_size = 8192 -
961 devp->rdev.hw_queue.t4_eq_status_entries - 1;
962 devp->rdev.hw_queue.t4_max_sq_size =
963 devp->rdev.hw_queue.t4_max_eq_size -
964 devp->rdev.hw_queue.t4_eq_status_entries - 1;
965 devp->rdev.hw_queue.t4_max_qp_depth =
966 devp->rdev.hw_queue.t4_max_rq_size;
967 devp->rdev.hw_queue.t4_max_cq_depth =
968 devp->rdev.hw_queue.t4_max_iq_size - 2;
969 devp->rdev.hw_queue.t4_stat_len =
970 devp->rdev.lldi.sge_egrstatuspagesize;
971
972
973
974
975
976
977 devp->rdev.bar2_pa = pci_resource_start(devp->rdev.lldi.pdev, 2);
978 if (is_t5(devp->rdev.lldi.adapter_type)) {
979 devp->rdev.bar2_kva = ioremap_wc(devp->rdev.bar2_pa,
980 pci_resource_len(devp->rdev.lldi.pdev, 2));
981 if (!devp->rdev.bar2_kva) {
982 pr_err(MOD "Unable to ioremap BAR2\n");
983 ib_dealloc_device(&devp->ibdev);
984 return ERR_PTR(-EINVAL);
985 }
986 } else if (ocqp_supported(infop)) {
987 devp->rdev.oc_mw_pa =
988 pci_resource_start(devp->rdev.lldi.pdev, 2) +
989 pci_resource_len(devp->rdev.lldi.pdev, 2) -
990 roundup_pow_of_two(devp->rdev.lldi.vr->ocq.size);
991 devp->rdev.oc_mw_kva = ioremap_wc(devp->rdev.oc_mw_pa,
992 devp->rdev.lldi.vr->ocq.size);
993 if (!devp->rdev.oc_mw_kva) {
994 pr_err(MOD "Unable to ioremap onchip mem\n");
995 ib_dealloc_device(&devp->ibdev);
996 return ERR_PTR(-EINVAL);
997 }
998 }
999
1000 PDBG(KERN_INFO MOD "ocq memory: "
1001 "hw_start 0x%x size %u mw_pa 0x%lx mw_kva %p\n",
1002 devp->rdev.lldi.vr->ocq.start, devp->rdev.lldi.vr->ocq.size,
1003 devp->rdev.oc_mw_pa, devp->rdev.oc_mw_kva);
1004
1005 ret = c4iw_rdev_open(&devp->rdev);
1006 if (ret) {
1007 printk(KERN_ERR MOD "Unable to open CXIO rdev err %d\n", ret);
1008 ib_dealloc_device(&devp->ibdev);
1009 return ERR_PTR(ret);
1010 }
1011
1012 idr_init(&devp->cqidr);
1013 idr_init(&devp->qpidr);
1014 idr_init(&devp->mmidr);
1015 idr_init(&devp->hwtid_idr);
1016 idr_init(&devp->stid_idr);
1017 idr_init(&devp->atid_idr);
1018 spin_lock_init(&devp->lock);
1019 mutex_init(&devp->rdev.stats.lock);
1020 mutex_init(&devp->db_mutex);
1021 INIT_LIST_HEAD(&devp->db_fc_list);
1022 devp->avail_ird = devp->rdev.lldi.max_ird_adapter;
1023
1024 if (c4iw_debugfs_root) {
1025 devp->debugfs_root = debugfs_create_dir(
1026 pci_name(devp->rdev.lldi.pdev),
1027 c4iw_debugfs_root);
1028 setup_debugfs(devp);
1029 }
1030
1031
1032 return devp;
1033}
1034
1035static void *c4iw_uld_add(const struct cxgb4_lld_info *infop)
1036{
1037 struct uld_ctx *ctx;
1038 static int vers_printed;
1039 int i;
1040
1041 if (!vers_printed++)
1042 pr_info("Chelsio T4/T5 RDMA Driver - version %s\n",
1043 DRV_VERSION);
1044
1045 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
1046 if (!ctx) {
1047 ctx = ERR_PTR(-ENOMEM);
1048 goto out;
1049 }
1050 ctx->lldi = *infop;
1051
1052 PDBG("%s found device %s nchan %u nrxq %u ntxq %u nports %u\n",
1053 __func__, pci_name(ctx->lldi.pdev),
1054 ctx->lldi.nchan, ctx->lldi.nrxq,
1055 ctx->lldi.ntxq, ctx->lldi.nports);
1056
1057 mutex_lock(&dev_mutex);
1058 list_add_tail(&ctx->entry, &uld_ctx_list);
1059 mutex_unlock(&dev_mutex);
1060
1061 for (i = 0; i < ctx->lldi.nrxq; i++)
1062 PDBG("rxqid[%u] %u\n", i, ctx->lldi.rxq_ids[i]);
1063out:
1064 return ctx;
1065}
1066
1067static inline struct sk_buff *copy_gl_to_skb_pkt(const struct pkt_gl *gl,
1068 const __be64 *rsp,
1069 u32 pktshift)
1070{
1071 struct sk_buff *skb;
1072
1073
1074
1075
1076
1077
1078
1079
1080 skb = alloc_skb(gl->tot_len + sizeof(struct cpl_pass_accept_req) +
1081 sizeof(struct rss_header) - pktshift, GFP_ATOMIC);
1082 if (unlikely(!skb))
1083 return NULL;
1084
1085 __skb_put(skb, gl->tot_len + sizeof(struct cpl_pass_accept_req) +
1086 sizeof(struct rss_header) - pktshift);
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096 skb_copy_to_linear_data(skb, rsp, sizeof(struct cpl_pass_accept_req) +
1097 sizeof(struct rss_header));
1098 skb_copy_to_linear_data_offset(skb, sizeof(struct rss_header) +
1099 sizeof(struct cpl_pass_accept_req),
1100 gl->va + pktshift,
1101 gl->tot_len - pktshift);
1102 return skb;
1103}
1104
1105static inline int recv_rx_pkt(struct c4iw_dev *dev, const struct pkt_gl *gl,
1106 const __be64 *rsp)
1107{
1108 unsigned int opcode = *(u8 *)rsp;
1109 struct sk_buff *skb;
1110
1111 if (opcode != CPL_RX_PKT)
1112 goto out;
1113
1114 skb = copy_gl_to_skb_pkt(gl , rsp, dev->rdev.lldi.sge_pktshift);
1115 if (skb == NULL)
1116 goto out;
1117
1118 if (c4iw_handlers[opcode] == NULL) {
1119 pr_info("%s no handler opcode 0x%x...\n", __func__,
1120 opcode);
1121 kfree_skb(skb);
1122 goto out;
1123 }
1124 c4iw_handlers[opcode](dev, skb);
1125 return 1;
1126out:
1127 return 0;
1128}
1129
1130static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp,
1131 const struct pkt_gl *gl)
1132{
1133 struct uld_ctx *ctx = handle;
1134 struct c4iw_dev *dev = ctx->dev;
1135 struct sk_buff *skb;
1136 u8 opcode;
1137
1138 if (gl == NULL) {
1139
1140 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1141
1142 skb = alloc_skb(256, GFP_ATOMIC);
1143 if (!skb)
1144 goto nomem;
1145 __skb_put(skb, len);
1146 skb_copy_to_linear_data(skb, &rsp[1], len);
1147 } else if (gl == CXGB4_MSG_AN) {
1148 const struct rsp_ctrl *rc = (void *)rsp;
1149
1150 u32 qid = be32_to_cpu(rc->pldbuflen_qid);
1151 c4iw_ev_handler(dev, qid);
1152 return 0;
1153 } else if (unlikely(*(u8 *)rsp != *(u8 *)gl->va)) {
1154 if (recv_rx_pkt(dev, gl, rsp))
1155 return 0;
1156
1157 pr_info("%s: unexpected FL contents at %p, " \
1158 "RSS %#llx, FL %#llx, len %u\n",
1159 pci_name(ctx->lldi.pdev), gl->va,
1160 (unsigned long long)be64_to_cpu(*rsp),
1161 (unsigned long long)be64_to_cpu(
1162 *(__force __be64 *)gl->va),
1163 gl->tot_len);
1164
1165 return 0;
1166 } else {
1167 skb = cxgb4_pktgl_to_skb(gl, 128, 128);
1168 if (unlikely(!skb))
1169 goto nomem;
1170 }
1171
1172 opcode = *(u8 *)rsp;
1173 if (c4iw_handlers[opcode]) {
1174 c4iw_handlers[opcode](dev, skb);
1175 } else {
1176 pr_info("%s no handler opcode 0x%x...\n", __func__,
1177 opcode);
1178 kfree_skb(skb);
1179 }
1180
1181 return 0;
1182nomem:
1183 return -1;
1184}
1185
1186static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state)
1187{
1188 struct uld_ctx *ctx = handle;
1189
1190 PDBG("%s new_state %u\n", __func__, new_state);
1191 switch (new_state) {
1192 case CXGB4_STATE_UP:
1193 printk(KERN_INFO MOD "%s: Up\n", pci_name(ctx->lldi.pdev));
1194 if (!ctx->dev) {
1195 int ret;
1196
1197 ctx->dev = c4iw_alloc(&ctx->lldi);
1198 if (IS_ERR(ctx->dev)) {
1199 printk(KERN_ERR MOD
1200 "%s: initialization failed: %ld\n",
1201 pci_name(ctx->lldi.pdev),
1202 PTR_ERR(ctx->dev));
1203 ctx->dev = NULL;
1204 break;
1205 }
1206 ret = c4iw_register_device(ctx->dev);
1207 if (ret) {
1208 printk(KERN_ERR MOD
1209 "%s: RDMA registration failed: %d\n",
1210 pci_name(ctx->lldi.pdev), ret);
1211 c4iw_dealloc(ctx);
1212 }
1213 }
1214 break;
1215 case CXGB4_STATE_DOWN:
1216 printk(KERN_INFO MOD "%s: Down\n",
1217 pci_name(ctx->lldi.pdev));
1218 if (ctx->dev)
1219 c4iw_remove(ctx);
1220 break;
1221 case CXGB4_STATE_START_RECOVERY:
1222 printk(KERN_INFO MOD "%s: Fatal Error\n",
1223 pci_name(ctx->lldi.pdev));
1224 if (ctx->dev) {
1225 struct ib_event event;
1226
1227 ctx->dev->rdev.flags |= T4_FATAL_ERROR;
1228 memset(&event, 0, sizeof event);
1229 event.event = IB_EVENT_DEVICE_FATAL;
1230 event.device = &ctx->dev->ibdev;
1231 ib_dispatch_event(&event);
1232 c4iw_remove(ctx);
1233 }
1234 break;
1235 case CXGB4_STATE_DETACH:
1236 printk(KERN_INFO MOD "%s: Detach\n",
1237 pci_name(ctx->lldi.pdev));
1238 if (ctx->dev)
1239 c4iw_remove(ctx);
1240 break;
1241 }
1242 return 0;
1243}
1244
1245static int disable_qp_db(int id, void *p, void *data)
1246{
1247 struct c4iw_qp *qp = p;
1248
1249 t4_disable_wq_db(&qp->wq);
1250 return 0;
1251}
1252
1253static void stop_queues(struct uld_ctx *ctx)
1254{
1255 unsigned long flags;
1256
1257 spin_lock_irqsave(&ctx->dev->lock, flags);
1258 ctx->dev->rdev.stats.db_state_transitions++;
1259 ctx->dev->db_state = STOPPED;
1260 if (ctx->dev->rdev.flags & T4_STATUS_PAGE_DISABLED)
1261 idr_for_each(&ctx->dev->qpidr, disable_qp_db, NULL);
1262 else
1263 ctx->dev->rdev.status_page->db_off = 1;
1264 spin_unlock_irqrestore(&ctx->dev->lock, flags);
1265}
1266
1267static int enable_qp_db(int id, void *p, void *data)
1268{
1269 struct c4iw_qp *qp = p;
1270
1271 t4_enable_wq_db(&qp->wq);
1272 return 0;
1273}
1274
1275static void resume_rc_qp(struct c4iw_qp *qp)
1276{
1277 spin_lock(&qp->lock);
1278 t4_ring_sq_db(&qp->wq, qp->wq.sq.wq_pidx_inc,
1279 is_t5(qp->rhp->rdev.lldi.adapter_type), NULL);
1280 qp->wq.sq.wq_pidx_inc = 0;
1281 t4_ring_rq_db(&qp->wq, qp->wq.rq.wq_pidx_inc,
1282 is_t5(qp->rhp->rdev.lldi.adapter_type), NULL);
1283 qp->wq.rq.wq_pidx_inc = 0;
1284 spin_unlock(&qp->lock);
1285}
1286
1287static void resume_a_chunk(struct uld_ctx *ctx)
1288{
1289 int i;
1290 struct c4iw_qp *qp;
1291
1292 for (i = 0; i < DB_FC_RESUME_SIZE; i++) {
1293 qp = list_first_entry(&ctx->dev->db_fc_list, struct c4iw_qp,
1294 db_fc_entry);
1295 list_del_init(&qp->db_fc_entry);
1296 resume_rc_qp(qp);
1297 if (list_empty(&ctx->dev->db_fc_list))
1298 break;
1299 }
1300}
1301
1302static void resume_queues(struct uld_ctx *ctx)
1303{
1304 spin_lock_irq(&ctx->dev->lock);
1305 if (ctx->dev->db_state != STOPPED)
1306 goto out;
1307 ctx->dev->db_state = FLOW_CONTROL;
1308 while (1) {
1309 if (list_empty(&ctx->dev->db_fc_list)) {
1310 WARN_ON(ctx->dev->db_state != FLOW_CONTROL);
1311 ctx->dev->db_state = NORMAL;
1312 ctx->dev->rdev.stats.db_state_transitions++;
1313 if (ctx->dev->rdev.flags & T4_STATUS_PAGE_DISABLED) {
1314 idr_for_each(&ctx->dev->qpidr, enable_qp_db,
1315 NULL);
1316 } else {
1317 ctx->dev->rdev.status_page->db_off = 0;
1318 }
1319 break;
1320 } else {
1321 if (cxgb4_dbfifo_count(ctx->dev->rdev.lldi.ports[0], 1)
1322 < (ctx->dev->rdev.lldi.dbfifo_int_thresh <<
1323 DB_FC_DRAIN_THRESH)) {
1324 resume_a_chunk(ctx);
1325 }
1326 if (!list_empty(&ctx->dev->db_fc_list)) {
1327 spin_unlock_irq(&ctx->dev->lock);
1328 if (DB_FC_RESUME_DELAY) {
1329 set_current_state(TASK_UNINTERRUPTIBLE);
1330 schedule_timeout(DB_FC_RESUME_DELAY);
1331 }
1332 spin_lock_irq(&ctx->dev->lock);
1333 if (ctx->dev->db_state != FLOW_CONTROL)
1334 break;
1335 }
1336 }
1337 }
1338out:
1339 if (ctx->dev->db_state != NORMAL)
1340 ctx->dev->rdev.stats.db_fc_interruptions++;
1341 spin_unlock_irq(&ctx->dev->lock);
1342}
1343
1344struct qp_list {
1345 unsigned idx;
1346 struct c4iw_qp **qps;
1347};
1348
1349static int add_and_ref_qp(int id, void *p, void *data)
1350{
1351 struct qp_list *qp_listp = data;
1352 struct c4iw_qp *qp = p;
1353
1354 c4iw_qp_add_ref(&qp->ibqp);
1355 qp_listp->qps[qp_listp->idx++] = qp;
1356 return 0;
1357}
1358
1359static int count_qps(int id, void *p, void *data)
1360{
1361 unsigned *countp = data;
1362 (*countp)++;
1363 return 0;
1364}
1365
1366static void deref_qps(struct qp_list *qp_list)
1367{
1368 int idx;
1369
1370 for (idx = 0; idx < qp_list->idx; idx++)
1371 c4iw_qp_rem_ref(&qp_list->qps[idx]->ibqp);
1372}
1373
1374static void recover_lost_dbs(struct uld_ctx *ctx, struct qp_list *qp_list)
1375{
1376 int idx;
1377 int ret;
1378
1379 for (idx = 0; idx < qp_list->idx; idx++) {
1380 struct c4iw_qp *qp = qp_list->qps[idx];
1381
1382 spin_lock_irq(&qp->rhp->lock);
1383 spin_lock(&qp->lock);
1384 ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0],
1385 qp->wq.sq.qid,
1386 t4_sq_host_wq_pidx(&qp->wq),
1387 t4_sq_wq_size(&qp->wq));
1388 if (ret) {
1389 pr_err(MOD "%s: Fatal error - "
1390 "DB overflow recovery failed - "
1391 "error syncing SQ qid %u\n",
1392 pci_name(ctx->lldi.pdev), qp->wq.sq.qid);
1393 spin_unlock(&qp->lock);
1394 spin_unlock_irq(&qp->rhp->lock);
1395 return;
1396 }
1397 qp->wq.sq.wq_pidx_inc = 0;
1398
1399 ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0],
1400 qp->wq.rq.qid,
1401 t4_rq_host_wq_pidx(&qp->wq),
1402 t4_rq_wq_size(&qp->wq));
1403
1404 if (ret) {
1405 pr_err(MOD "%s: Fatal error - "
1406 "DB overflow recovery failed - "
1407 "error syncing RQ qid %u\n",
1408 pci_name(ctx->lldi.pdev), qp->wq.rq.qid);
1409 spin_unlock(&qp->lock);
1410 spin_unlock_irq(&qp->rhp->lock);
1411 return;
1412 }
1413 qp->wq.rq.wq_pidx_inc = 0;
1414 spin_unlock(&qp->lock);
1415 spin_unlock_irq(&qp->rhp->lock);
1416
1417
1418 while (cxgb4_dbfifo_count(qp->rhp->rdev.lldi.ports[0], 1) > 0) {
1419 set_current_state(TASK_UNINTERRUPTIBLE);
1420 schedule_timeout(usecs_to_jiffies(10));
1421 }
1422 }
1423}
1424
1425static void recover_queues(struct uld_ctx *ctx)
1426{
1427 int count = 0;
1428 struct qp_list qp_list;
1429 int ret;
1430
1431
1432 set_current_state(TASK_UNINTERRUPTIBLE);
1433 schedule_timeout(usecs_to_jiffies(1000));
1434
1435
1436 ret = cxgb4_flush_eq_cache(ctx->dev->rdev.lldi.ports[0]);
1437 if (ret) {
1438 printk(KERN_ERR MOD "%s: Fatal error - DB overflow recovery failed\n",
1439 pci_name(ctx->lldi.pdev));
1440 return;
1441 }
1442
1443
1444 spin_lock_irq(&ctx->dev->lock);
1445 WARN_ON(ctx->dev->db_state != STOPPED);
1446 ctx->dev->db_state = RECOVERY;
1447 idr_for_each(&ctx->dev->qpidr, count_qps, &count);
1448
1449 qp_list.qps = kzalloc(count * sizeof *qp_list.qps, GFP_ATOMIC);
1450 if (!qp_list.qps) {
1451 printk(KERN_ERR MOD "%s: Fatal error - DB overflow recovery failed\n",
1452 pci_name(ctx->lldi.pdev));
1453 spin_unlock_irq(&ctx->dev->lock);
1454 return;
1455 }
1456 qp_list.idx = 0;
1457
1458
1459 idr_for_each(&ctx->dev->qpidr, add_and_ref_qp, &qp_list);
1460
1461 spin_unlock_irq(&ctx->dev->lock);
1462
1463
1464 recover_lost_dbs(ctx, &qp_list);
1465
1466
1467 deref_qps(&qp_list);
1468 kfree(qp_list.qps);
1469
1470 spin_lock_irq(&ctx->dev->lock);
1471 WARN_ON(ctx->dev->db_state != RECOVERY);
1472 ctx->dev->db_state = STOPPED;
1473 spin_unlock_irq(&ctx->dev->lock);
1474}
1475
1476static int c4iw_uld_control(void *handle, enum cxgb4_control control, ...)
1477{
1478 struct uld_ctx *ctx = handle;
1479
1480 switch (control) {
1481 case CXGB4_CONTROL_DB_FULL:
1482 stop_queues(ctx);
1483 ctx->dev->rdev.stats.db_full++;
1484 break;
1485 case CXGB4_CONTROL_DB_EMPTY:
1486 resume_queues(ctx);
1487 mutex_lock(&ctx->dev->rdev.stats.lock);
1488 ctx->dev->rdev.stats.db_empty++;
1489 mutex_unlock(&ctx->dev->rdev.stats.lock);
1490 break;
1491 case CXGB4_CONTROL_DB_DROP:
1492 recover_queues(ctx);
1493 mutex_lock(&ctx->dev->rdev.stats.lock);
1494 ctx->dev->rdev.stats.db_drop++;
1495 mutex_unlock(&ctx->dev->rdev.stats.lock);
1496 break;
1497 default:
1498 printk(KERN_WARNING MOD "%s: unknown control cmd %u\n",
1499 pci_name(ctx->lldi.pdev), control);
1500 break;
1501 }
1502 return 0;
1503}
1504
1505static struct cxgb4_uld_info c4iw_uld_info = {
1506 .name = DRV_NAME,
1507 .add = c4iw_uld_add,
1508 .rx_handler = c4iw_uld_rx_handler,
1509 .state_change = c4iw_uld_state_change,
1510 .control = c4iw_uld_control,
1511};
1512
1513static int __init c4iw_init_module(void)
1514{
1515 int err;
1516
1517 err = c4iw_cm_init();
1518 if (err)
1519 return err;
1520
1521 c4iw_debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
1522 if (!c4iw_debugfs_root)
1523 printk(KERN_WARNING MOD
1524 "could not create debugfs entry, continuing\n");
1525
1526 if (ibnl_add_client(RDMA_NL_C4IW, RDMA_NL_IWPM_NUM_OPS,
1527 c4iw_nl_cb_table))
1528 pr_err("%s[%u]: Failed to add netlink callback\n"
1529 , __func__, __LINE__);
1530
1531 err = iwpm_init(RDMA_NL_C4IW);
1532 if (err) {
1533 pr_err("port mapper initialization failed with %d\n", err);
1534 ibnl_remove_client(RDMA_NL_C4IW);
1535 c4iw_cm_term();
1536 debugfs_remove_recursive(c4iw_debugfs_root);
1537 return err;
1538 }
1539
1540 cxgb4_register_uld(CXGB4_ULD_RDMA, &c4iw_uld_info);
1541
1542 return 0;
1543}
1544
1545static void __exit c4iw_exit_module(void)
1546{
1547 struct uld_ctx *ctx, *tmp;
1548
1549 mutex_lock(&dev_mutex);
1550 list_for_each_entry_safe(ctx, tmp, &uld_ctx_list, entry) {
1551 if (ctx->dev)
1552 c4iw_remove(ctx);
1553 kfree(ctx);
1554 }
1555 mutex_unlock(&dev_mutex);
1556 cxgb4_unregister_uld(CXGB4_ULD_RDMA);
1557 iwpm_exit(RDMA_NL_C4IW);
1558 ibnl_remove_client(RDMA_NL_C4IW);
1559 c4iw_cm_term();
1560 debugfs_remove_recursive(c4iw_debugfs_root);
1561}
1562
1563module_init(c4iw_init_module);
1564module_exit(c4iw_exit_module);
1565
