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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 count = 1;
319
320 qpd = kmalloc(sizeof *qpd, GFP_KERNEL);
321 if (!qpd)
322 return -ENOMEM;
323
324 qpd->devp = inode->i_private;
325 qpd->pos = 0;
326
327 spin_lock_irq(&qpd->devp->lock);
328 idr_for_each(&qpd->devp->qpidr, count_idrs, &count);
329 spin_unlock_irq(&qpd->devp->lock);
330
331 qpd->bufsize = count * 128;
332 qpd->buf = vmalloc(qpd->bufsize);
333 if (!qpd->buf) {
334 kfree(qpd);
335 return -ENOMEM;
336 }
337
338 spin_lock_irq(&qpd->devp->lock);
339 idr_for_each(&qpd->devp->qpidr, dump_qp, qpd);
340 spin_unlock_irq(&qpd->devp->lock);
341
342 qpd->buf[qpd->pos++] = 0;
343 file->private_data = qpd;
344 return 0;
345}
346
347static const struct file_operations qp_debugfs_fops = {
348 .owner = THIS_MODULE,
349 .open = qp_open,
350 .release = qp_release,
351 .read = debugfs_read,
352 .llseek = default_llseek,
353};
354
355static int dump_stag(int id, void *p, void *data)
356{
357 struct c4iw_debugfs_data *stagd = data;
358 int space;
359 int cc;
360 struct fw_ri_tpte tpte;
361 int ret;
362
363 space = stagd->bufsize - stagd->pos - 1;
364 if (space == 0)
365 return 1;
366
367 ret = cxgb4_read_tpte(stagd->devp->rdev.lldi.ports[0], (u32)id<<8,
368 (__be32 *)&tpte);
369 if (ret) {
370 dev_err(&stagd->devp->rdev.lldi.pdev->dev,
371 "%s cxgb4_read_tpte err %d\n", __func__, ret);
372 return ret;
373 }
374 cc = snprintf(stagd->buf + stagd->pos, space,
375 "stag: idx 0x%x valid %d key 0x%x state %d pdid %d "
376 "perm 0x%x ps %d len 0x%llx va 0x%llx\n",
377 (u32)id<<8,
378 FW_RI_TPTE_VALID_G(ntohl(tpte.valid_to_pdid)),
379 FW_RI_TPTE_STAGKEY_G(ntohl(tpte.valid_to_pdid)),
380 FW_RI_TPTE_STAGSTATE_G(ntohl(tpte.valid_to_pdid)),
381 FW_RI_TPTE_PDID_G(ntohl(tpte.valid_to_pdid)),
382 FW_RI_TPTE_PERM_G(ntohl(tpte.locread_to_qpid)),
383 FW_RI_TPTE_PS_G(ntohl(tpte.locread_to_qpid)),
384 ((u64)ntohl(tpte.len_hi) << 32) | ntohl(tpte.len_lo),
385 ((u64)ntohl(tpte.va_hi) << 32) | ntohl(tpte.va_lo_fbo));
386 if (cc < space)
387 stagd->pos += cc;
388 return 0;
389}
390
391static int stag_release(struct inode *inode, struct file *file)
392{
393 struct c4iw_debugfs_data *stagd = file->private_data;
394 if (!stagd) {
395 printk(KERN_INFO "%s null stagd?\n", __func__);
396 return 0;
397 }
398 vfree(stagd->buf);
399 kfree(stagd);
400 return 0;
401}
402
403static int stag_open(struct inode *inode, struct file *file)
404{
405 struct c4iw_debugfs_data *stagd;
406 int ret = 0;
407 int count = 1;
408
409 stagd = kmalloc(sizeof *stagd, GFP_KERNEL);
410 if (!stagd) {
411 ret = -ENOMEM;
412 goto out;
413 }
414 stagd->devp = inode->i_private;
415 stagd->pos = 0;
416
417 spin_lock_irq(&stagd->devp->lock);
418 idr_for_each(&stagd->devp->mmidr, count_idrs, &count);
419 spin_unlock_irq(&stagd->devp->lock);
420
421 stagd->bufsize = count * 256;
422 stagd->buf = vmalloc(stagd->bufsize);
423 if (!stagd->buf) {
424 ret = -ENOMEM;
425 goto err1;
426 }
427
428 spin_lock_irq(&stagd->devp->lock);
429 idr_for_each(&stagd->devp->mmidr, dump_stag, stagd);
430 spin_unlock_irq(&stagd->devp->lock);
431
432 stagd->buf[stagd->pos++] = 0;
433 file->private_data = stagd;
434 goto out;
435err1:
436 kfree(stagd);
437out:
438 return ret;
439}
440
441static const struct file_operations stag_debugfs_fops = {
442 .owner = THIS_MODULE,
443 .open = stag_open,
444 .release = stag_release,
445 .read = debugfs_read,
446 .llseek = default_llseek,
447};
448
449static char *db_state_str[] = {"NORMAL", "FLOW_CONTROL", "RECOVERY", "STOPPED"};
450
451static int stats_show(struct seq_file *seq, void *v)
452{
453 struct c4iw_dev *dev = seq->private;
454
455 seq_printf(seq, " Object: %10s %10s %10s %10s\n", "Total", "Current",
456 "Max", "Fail");
457 seq_printf(seq, " PDID: %10llu %10llu %10llu %10llu\n",
458 dev->rdev.stats.pd.total, dev->rdev.stats.pd.cur,
459 dev->rdev.stats.pd.max, dev->rdev.stats.pd.fail);
460 seq_printf(seq, " QID: %10llu %10llu %10llu %10llu\n",
461 dev->rdev.stats.qid.total, dev->rdev.stats.qid.cur,
462 dev->rdev.stats.qid.max, dev->rdev.stats.qid.fail);
463 seq_printf(seq, " TPTMEM: %10llu %10llu %10llu %10llu\n",
464 dev->rdev.stats.stag.total, dev->rdev.stats.stag.cur,
465 dev->rdev.stats.stag.max, dev->rdev.stats.stag.fail);
466 seq_printf(seq, " PBLMEM: %10llu %10llu %10llu %10llu\n",
467 dev->rdev.stats.pbl.total, dev->rdev.stats.pbl.cur,
468 dev->rdev.stats.pbl.max, dev->rdev.stats.pbl.fail);
469 seq_printf(seq, " RQTMEM: %10llu %10llu %10llu %10llu\n",
470 dev->rdev.stats.rqt.total, dev->rdev.stats.rqt.cur,
471 dev->rdev.stats.rqt.max, dev->rdev.stats.rqt.fail);
472 seq_printf(seq, " OCQPMEM: %10llu %10llu %10llu %10llu\n",
473 dev->rdev.stats.ocqp.total, dev->rdev.stats.ocqp.cur,
474 dev->rdev.stats.ocqp.max, dev->rdev.stats.ocqp.fail);
475 seq_printf(seq, " DB FULL: %10llu\n", dev->rdev.stats.db_full);
476 seq_printf(seq, " DB EMPTY: %10llu\n", dev->rdev.stats.db_empty);
477 seq_printf(seq, " DB DROP: %10llu\n", dev->rdev.stats.db_drop);
478 seq_printf(seq, " DB State: %s Transitions %llu FC Interruptions %llu\n",
479 db_state_str[dev->db_state],
480 dev->rdev.stats.db_state_transitions,
481 dev->rdev.stats.db_fc_interruptions);
482 seq_printf(seq, "TCAM_FULL: %10llu\n", dev->rdev.stats.tcam_full);
483 seq_printf(seq, "ACT_OFLD_CONN_FAILS: %10llu\n",
484 dev->rdev.stats.act_ofld_conn_fails);
485 seq_printf(seq, "PAS_OFLD_CONN_FAILS: %10llu\n",
486 dev->rdev.stats.pas_ofld_conn_fails);
487 seq_printf(seq, "NEG_ADV_RCVD: %10llu\n", dev->rdev.stats.neg_adv);
488 seq_printf(seq, "AVAILABLE IRD: %10u\n", dev->avail_ird);
489 return 0;
490}
491
492static int stats_open(struct inode *inode, struct file *file)
493{
494 return single_open(file, stats_show, inode->i_private);
495}
496
497static ssize_t stats_clear(struct file *file, const char __user *buf,
498 size_t count, loff_t *pos)
499{
500 struct c4iw_dev *dev = ((struct seq_file *)file->private_data)->private;
501
502 mutex_lock(&dev->rdev.stats.lock);
503 dev->rdev.stats.pd.max = 0;
504 dev->rdev.stats.pd.fail = 0;
505 dev->rdev.stats.qid.max = 0;
506 dev->rdev.stats.qid.fail = 0;
507 dev->rdev.stats.stag.max = 0;
508 dev->rdev.stats.stag.fail = 0;
509 dev->rdev.stats.pbl.max = 0;
510 dev->rdev.stats.pbl.fail = 0;
511 dev->rdev.stats.rqt.max = 0;
512 dev->rdev.stats.rqt.fail = 0;
513 dev->rdev.stats.ocqp.max = 0;
514 dev->rdev.stats.ocqp.fail = 0;
515 dev->rdev.stats.db_full = 0;
516 dev->rdev.stats.db_empty = 0;
517 dev->rdev.stats.db_drop = 0;
518 dev->rdev.stats.db_state_transitions = 0;
519 dev->rdev.stats.tcam_full = 0;
520 dev->rdev.stats.act_ofld_conn_fails = 0;
521 dev->rdev.stats.pas_ofld_conn_fails = 0;
522 mutex_unlock(&dev->rdev.stats.lock);
523 return count;
524}
525
526static const struct file_operations stats_debugfs_fops = {
527 .owner = THIS_MODULE,
528 .open = stats_open,
529 .release = single_release,
530 .read = seq_read,
531 .llseek = seq_lseek,
532 .write = stats_clear,
533};
534
535static int dump_ep(int id, void *p, void *data)
536{
537 struct c4iw_ep *ep = p;
538 struct c4iw_debugfs_data *epd = data;
539 int space;
540 int cc;
541
542 space = epd->bufsize - epd->pos - 1;
543 if (space == 0)
544 return 1;
545
546 if (ep->com.local_addr.ss_family == AF_INET) {
547 struct sockaddr_in *lsin = (struct sockaddr_in *)
548 &ep->com.local_addr;
549 struct sockaddr_in *rsin = (struct sockaddr_in *)
550 &ep->com.remote_addr;
551 struct sockaddr_in *mapped_lsin = (struct sockaddr_in *)
552 &ep->com.mapped_local_addr;
553 struct sockaddr_in *mapped_rsin = (struct sockaddr_in *)
554 &ep->com.mapped_remote_addr;
555
556 cc = snprintf(epd->buf + epd->pos, space,
557 "ep %p cm_id %p qp %p state %d flags 0x%lx "
558 "history 0x%lx hwtid %d atid %d "
559 "conn_na %u abort_na %u "
560 "%pI4:%d/%d <-> %pI4:%d/%d\n",
561 ep, ep->com.cm_id, ep->com.qp,
562 (int)ep->com.state, ep->com.flags,
563 ep->com.history, ep->hwtid, ep->atid,
564 ep->stats.connect_neg_adv,
565 ep->stats.abort_neg_adv,
566 &lsin->sin_addr, ntohs(lsin->sin_port),
567 ntohs(mapped_lsin->sin_port),
568 &rsin->sin_addr, ntohs(rsin->sin_port),
569 ntohs(mapped_rsin->sin_port));
570 } else {
571 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)
572 &ep->com.local_addr;
573 struct sockaddr_in6 *rsin6 = (struct sockaddr_in6 *)
574 &ep->com.remote_addr;
575 struct sockaddr_in6 *mapped_lsin6 = (struct sockaddr_in6 *)
576 &ep->com.mapped_local_addr;
577 struct sockaddr_in6 *mapped_rsin6 = (struct sockaddr_in6 *)
578 &ep->com.mapped_remote_addr;
579
580 cc = snprintf(epd->buf + epd->pos, space,
581 "ep %p cm_id %p qp %p state %d flags 0x%lx "
582 "history 0x%lx hwtid %d atid %d "
583 "conn_na %u abort_na %u "
584 "%pI6:%d/%d <-> %pI6:%d/%d\n",
585 ep, ep->com.cm_id, ep->com.qp,
586 (int)ep->com.state, ep->com.flags,
587 ep->com.history, ep->hwtid, ep->atid,
588 ep->stats.connect_neg_adv,
589 ep->stats.abort_neg_adv,
590 &lsin6->sin6_addr, ntohs(lsin6->sin6_port),
591 ntohs(mapped_lsin6->sin6_port),
592 &rsin6->sin6_addr, ntohs(rsin6->sin6_port),
593 ntohs(mapped_rsin6->sin6_port));
594 }
595 if (cc < space)
596 epd->pos += cc;
597 return 0;
598}
599
600static int dump_listen_ep(int id, void *p, void *data)
601{
602 struct c4iw_listen_ep *ep = p;
603 struct c4iw_debugfs_data *epd = data;
604 int space;
605 int cc;
606
607 space = epd->bufsize - epd->pos - 1;
608 if (space == 0)
609 return 1;
610
611 if (ep->com.local_addr.ss_family == AF_INET) {
612 struct sockaddr_in *lsin = (struct sockaddr_in *)
613 &ep->com.local_addr;
614 struct sockaddr_in *mapped_lsin = (struct sockaddr_in *)
615 &ep->com.mapped_local_addr;
616
617 cc = snprintf(epd->buf + epd->pos, space,
618 "ep %p cm_id %p state %d flags 0x%lx stid %d "
619 "backlog %d %pI4:%d/%d\n",
620 ep, ep->com.cm_id, (int)ep->com.state,
621 ep->com.flags, ep->stid, ep->backlog,
622 &lsin->sin_addr, ntohs(lsin->sin_port),
623 ntohs(mapped_lsin->sin_port));
624 } else {
625 struct sockaddr_in6 *lsin6 = (struct sockaddr_in6 *)
626 &ep->com.local_addr;
627 struct sockaddr_in6 *mapped_lsin6 = (struct sockaddr_in6 *)
628 &ep->com.mapped_local_addr;
629
630 cc = snprintf(epd->buf + epd->pos, space,
631 "ep %p cm_id %p state %d flags 0x%lx stid %d "
632 "backlog %d %pI6:%d/%d\n",
633 ep, ep->com.cm_id, (int)ep->com.state,
634 ep->com.flags, ep->stid, ep->backlog,
635 &lsin6->sin6_addr, ntohs(lsin6->sin6_port),
636 ntohs(mapped_lsin6->sin6_port));
637 }
638 if (cc < space)
639 epd->pos += cc;
640 return 0;
641}
642
643static int ep_release(struct inode *inode, struct file *file)
644{
645 struct c4iw_debugfs_data *epd = file->private_data;
646 if (!epd) {
647 pr_info("%s null qpd?\n", __func__);
648 return 0;
649 }
650 vfree(epd->buf);
651 kfree(epd);
652 return 0;
653}
654
655static int ep_open(struct inode *inode, struct file *file)
656{
657 struct c4iw_debugfs_data *epd;
658 int ret = 0;
659 int count = 1;
660
661 epd = kmalloc(sizeof(*epd), GFP_KERNEL);
662 if (!epd) {
663 ret = -ENOMEM;
664 goto out;
665 }
666 epd->devp = inode->i_private;
667 epd->pos = 0;
668
669 spin_lock_irq(&epd->devp->lock);
670 idr_for_each(&epd->devp->hwtid_idr, count_idrs, &count);
671 idr_for_each(&epd->devp->atid_idr, count_idrs, &count);
672 idr_for_each(&epd->devp->stid_idr, count_idrs, &count);
673 spin_unlock_irq(&epd->devp->lock);
674
675 epd->bufsize = count * 240;
676 epd->buf = vmalloc(epd->bufsize);
677 if (!epd->buf) {
678 ret = -ENOMEM;
679 goto err1;
680 }
681
682 spin_lock_irq(&epd->devp->lock);
683 idr_for_each(&epd->devp->hwtid_idr, dump_ep, epd);
684 idr_for_each(&epd->devp->atid_idr, dump_ep, epd);
685 idr_for_each(&epd->devp->stid_idr, dump_listen_ep, epd);
686 spin_unlock_irq(&epd->devp->lock);
687
688 file->private_data = epd;
689 goto out;
690err1:
691 kfree(epd);
692out:
693 return ret;
694}
695
696static const struct file_operations ep_debugfs_fops = {
697 .owner = THIS_MODULE,
698 .open = ep_open,
699 .release = ep_release,
700 .read = debugfs_read,
701};
702
703static int setup_debugfs(struct c4iw_dev *devp)
704{
705 if (!devp->debugfs_root)
706 return -1;
707
708 debugfs_create_file_size("qps", S_IWUSR, devp->debugfs_root,
709 (void *)devp, &qp_debugfs_fops, 4096);
710
711 debugfs_create_file_size("stags", S_IWUSR, devp->debugfs_root,
712 (void *)devp, &stag_debugfs_fops, 4096);
713
714 debugfs_create_file_size("stats", S_IWUSR, devp->debugfs_root,
715 (void *)devp, &stats_debugfs_fops, 4096);
716
717 debugfs_create_file_size("eps", S_IWUSR, devp->debugfs_root,
718 (void *)devp, &ep_debugfs_fops, 4096);
719
720 if (c4iw_wr_log)
721 debugfs_create_file_size("wr_log", S_IWUSR, devp->debugfs_root,
722 (void *)devp, &wr_log_debugfs_fops, 4096);
723 return 0;
724}
725
726void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev,
727 struct c4iw_dev_ucontext *uctx)
728{
729 struct list_head *pos, *nxt;
730 struct c4iw_qid_list *entry;
731
732 mutex_lock(&uctx->lock);
733 list_for_each_safe(pos, nxt, &uctx->qpids) {
734 entry = list_entry(pos, struct c4iw_qid_list, entry);
735 list_del_init(&entry->entry);
736 if (!(entry->qid & rdev->qpmask)) {
737 c4iw_put_resource(&rdev->resource.qid_table,
738 entry->qid);
739 mutex_lock(&rdev->stats.lock);
740 rdev->stats.qid.cur -= rdev->qpmask + 1;
741 mutex_unlock(&rdev->stats.lock);
742 }
743 kfree(entry);
744 }
745
746 list_for_each_safe(pos, nxt, &uctx->qpids) {
747 entry = list_entry(pos, struct c4iw_qid_list, entry);
748 list_del_init(&entry->entry);
749 kfree(entry);
750 }
751 mutex_unlock(&uctx->lock);
752}
753
754void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev,
755 struct c4iw_dev_ucontext *uctx)
756{
757 INIT_LIST_HEAD(&uctx->qpids);
758 INIT_LIST_HEAD(&uctx->cqids);
759 mutex_init(&uctx->lock);
760}
761
762
763static int c4iw_rdev_open(struct c4iw_rdev *rdev)
764{
765 int err;
766
767 c4iw_init_dev_ucontext(rdev, &rdev->uctx);
768
769
770
771
772
773
774 if (rdev->lldi.udb_density != rdev->lldi.ucq_density) {
775 pr_err(MOD "%s: unsupported udb/ucq densities %u/%u\n",
776 pci_name(rdev->lldi.pdev), rdev->lldi.udb_density,
777 rdev->lldi.ucq_density);
778 return -EINVAL;
779 }
780 if (rdev->lldi.vr->qp.start != rdev->lldi.vr->cq.start ||
781 rdev->lldi.vr->qp.size != rdev->lldi.vr->cq.size) {
782 pr_err(MOD "%s: unsupported qp and cq id ranges "
783 "qp start %u size %u cq start %u size %u\n",
784 pci_name(rdev->lldi.pdev), rdev->lldi.vr->qp.start,
785 rdev->lldi.vr->qp.size, rdev->lldi.vr->cq.size,
786 rdev->lldi.vr->cq.size);
787 return -EINVAL;
788 }
789
790 rdev->qpmask = rdev->lldi.udb_density - 1;
791 rdev->cqmask = rdev->lldi.ucq_density - 1;
792 PDBG("%s dev %s stag start 0x%0x size 0x%0x num stags %d "
793 "pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x "
794 "qp qid start %u size %u cq qid start %u size %u\n",
795 __func__, pci_name(rdev->lldi.pdev), rdev->lldi.vr->stag.start,
796 rdev->lldi.vr->stag.size, c4iw_num_stags(rdev),
797 rdev->lldi.vr->pbl.start,
798 rdev->lldi.vr->pbl.size, rdev->lldi.vr->rq.start,
799 rdev->lldi.vr->rq.size,
800 rdev->lldi.vr->qp.start,
801 rdev->lldi.vr->qp.size,
802 rdev->lldi.vr->cq.start,
803 rdev->lldi.vr->cq.size);
804 PDBG("udb len 0x%x udb base %p db_reg %p gts_reg %p "
805 "qpmask 0x%x cqmask 0x%x\n",
806 (unsigned)pci_resource_len(rdev->lldi.pdev, 2),
807 (void *)pci_resource_start(rdev->lldi.pdev, 2),
808 rdev->lldi.db_reg, rdev->lldi.gts_reg,
809 rdev->qpmask, rdev->cqmask);
810
811 if (c4iw_num_stags(rdev) == 0)
812 return -EINVAL;
813
814 rdev->stats.pd.total = T4_MAX_NUM_PD;
815 rdev->stats.stag.total = rdev->lldi.vr->stag.size;
816 rdev->stats.pbl.total = rdev->lldi.vr->pbl.size;
817 rdev->stats.rqt.total = rdev->lldi.vr->rq.size;
818 rdev->stats.ocqp.total = rdev->lldi.vr->ocq.size;
819 rdev->stats.qid.total = rdev->lldi.vr->qp.size;
820
821 err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD);
822 if (err) {
823 printk(KERN_ERR MOD "error %d initializing resources\n", err);
824 return err;
825 }
826 err = c4iw_pblpool_create(rdev);
827 if (err) {
828 printk(KERN_ERR MOD "error %d initializing pbl pool\n", err);
829 goto destroy_resource;
830 }
831 err = c4iw_rqtpool_create(rdev);
832 if (err) {
833 printk(KERN_ERR MOD "error %d initializing rqt pool\n", err);
834 goto destroy_pblpool;
835 }
836 err = c4iw_ocqp_pool_create(rdev);
837 if (err) {
838 printk(KERN_ERR MOD "error %d initializing ocqp pool\n", err);
839 goto destroy_rqtpool;
840 }
841 rdev->status_page = (struct t4_dev_status_page *)
842 __get_free_page(GFP_KERNEL);
843 if (!rdev->status_page)
844 goto destroy_ocqp_pool;
845 rdev->status_page->qp_start = rdev->lldi.vr->qp.start;
846 rdev->status_page->qp_size = rdev->lldi.vr->qp.size;
847 rdev->status_page->cq_start = rdev->lldi.vr->cq.start;
848 rdev->status_page->cq_size = rdev->lldi.vr->cq.size;
849
850 if (c4iw_wr_log) {
851 rdev->wr_log = kzalloc((1 << c4iw_wr_log_size_order) *
852 sizeof(*rdev->wr_log), GFP_KERNEL);
853 if (rdev->wr_log) {
854 rdev->wr_log_size = 1 << c4iw_wr_log_size_order;
855 atomic_set(&rdev->wr_log_idx, 0);
856 } else {
857 pr_err(MOD "error allocating wr_log. Logging disabled\n");
858 }
859 }
860
861 rdev->status_page->db_off = 0;
862
863 return 0;
864destroy_ocqp_pool:
865 c4iw_ocqp_pool_destroy(rdev);
866destroy_rqtpool:
867 c4iw_rqtpool_destroy(rdev);
868destroy_pblpool:
869 c4iw_pblpool_destroy(rdev);
870destroy_resource:
871 c4iw_destroy_resource(&rdev->resource);
872 return err;
873}
874
875static void c4iw_rdev_close(struct c4iw_rdev *rdev)
876{
877 kfree(rdev->wr_log);
878 free_page((unsigned long)rdev->status_page);
879 c4iw_pblpool_destroy(rdev);
880 c4iw_rqtpool_destroy(rdev);
881 c4iw_destroy_resource(&rdev->resource);
882}
883
884static void c4iw_dealloc(struct uld_ctx *ctx)
885{
886 c4iw_rdev_close(&ctx->dev->rdev);
887 idr_destroy(&ctx->dev->cqidr);
888 idr_destroy(&ctx->dev->qpidr);
889 idr_destroy(&ctx->dev->mmidr);
890 idr_destroy(&ctx->dev->hwtid_idr);
891 idr_destroy(&ctx->dev->stid_idr);
892 idr_destroy(&ctx->dev->atid_idr);
893 if (ctx->dev->rdev.bar2_kva)
894 iounmap(ctx->dev->rdev.bar2_kva);
895 if (ctx->dev->rdev.oc_mw_kva)
896 iounmap(ctx->dev->rdev.oc_mw_kva);
897 ib_dealloc_device(&ctx->dev->ibdev);
898 ctx->dev = NULL;
899}
900
901static void c4iw_remove(struct uld_ctx *ctx)
902{
903 PDBG("%s c4iw_dev %p\n", __func__, ctx->dev);
904 c4iw_unregister_device(ctx->dev);
905 c4iw_dealloc(ctx);
906}
907
908static int rdma_supported(const struct cxgb4_lld_info *infop)
909{
910 return infop->vr->stag.size > 0 && infop->vr->pbl.size > 0 &&
911 infop->vr->rq.size > 0 && infop->vr->qp.size > 0 &&
912 infop->vr->cq.size > 0;
913}
914
915static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop)
916{
917 struct c4iw_dev *devp;
918 int ret;
919
920 if (!rdma_supported(infop)) {
921 printk(KERN_INFO MOD "%s: RDMA not supported on this device.\n",
922 pci_name(infop->pdev));
923 return ERR_PTR(-ENOSYS);
924 }
925 if (!ocqp_supported(infop))
926 pr_info("%s: On-Chip Queues not supported on this device.\n",
927 pci_name(infop->pdev));
928
929 devp = (struct c4iw_dev *)ib_alloc_device(sizeof(*devp));
930 if (!devp) {
931 printk(KERN_ERR MOD "Cannot allocate ib device\n");
932 return ERR_PTR(-ENOMEM);
933 }
934 devp->rdev.lldi = *infop;
935
936
937 PDBG("%s: Ing. padding boundary is %d, egrsstatuspagesize = %d\n",
938 __func__, devp->rdev.lldi.sge_ingpadboundary,
939 devp->rdev.lldi.sge_egrstatuspagesize);
940
941 devp->rdev.hw_queue.t4_eq_status_entries =
942 devp->rdev.lldi.sge_ingpadboundary > 64 ? 2 : 1;
943 devp->rdev.hw_queue.t4_max_eq_size = 65520;
944 devp->rdev.hw_queue.t4_max_iq_size = 65520;
945 devp->rdev.hw_queue.t4_max_rq_size = 8192 -
946 devp->rdev.hw_queue.t4_eq_status_entries - 1;
947 devp->rdev.hw_queue.t4_max_sq_size =
948 devp->rdev.hw_queue.t4_max_eq_size -
949 devp->rdev.hw_queue.t4_eq_status_entries - 1;
950 devp->rdev.hw_queue.t4_max_qp_depth =
951 devp->rdev.hw_queue.t4_max_rq_size;
952 devp->rdev.hw_queue.t4_max_cq_depth =
953 devp->rdev.hw_queue.t4_max_iq_size - 2;
954 devp->rdev.hw_queue.t4_stat_len =
955 devp->rdev.lldi.sge_egrstatuspagesize;
956
957
958
959
960
961
962 devp->rdev.bar2_pa = pci_resource_start(devp->rdev.lldi.pdev, 2);
963 if (!is_t4(devp->rdev.lldi.adapter_type)) {
964 devp->rdev.bar2_kva = ioremap_wc(devp->rdev.bar2_pa,
965 pci_resource_len(devp->rdev.lldi.pdev, 2));
966 if (!devp->rdev.bar2_kva) {
967 pr_err(MOD "Unable to ioremap BAR2\n");
968 ib_dealloc_device(&devp->ibdev);
969 return ERR_PTR(-EINVAL);
970 }
971 } else if (ocqp_supported(infop)) {
972 devp->rdev.oc_mw_pa =
973 pci_resource_start(devp->rdev.lldi.pdev, 2) +
974 pci_resource_len(devp->rdev.lldi.pdev, 2) -
975 roundup_pow_of_two(devp->rdev.lldi.vr->ocq.size);
976 devp->rdev.oc_mw_kva = ioremap_wc(devp->rdev.oc_mw_pa,
977 devp->rdev.lldi.vr->ocq.size);
978 if (!devp->rdev.oc_mw_kva) {
979 pr_err(MOD "Unable to ioremap onchip mem\n");
980 ib_dealloc_device(&devp->ibdev);
981 return ERR_PTR(-EINVAL);
982 }
983 }
984
985 PDBG(KERN_INFO MOD "ocq memory: "
986 "hw_start 0x%x size %u mw_pa 0x%lx mw_kva %p\n",
987 devp->rdev.lldi.vr->ocq.start, devp->rdev.lldi.vr->ocq.size,
988 devp->rdev.oc_mw_pa, devp->rdev.oc_mw_kva);
989
990 ret = c4iw_rdev_open(&devp->rdev);
991 if (ret) {
992 printk(KERN_ERR MOD "Unable to open CXIO rdev err %d\n", ret);
993 ib_dealloc_device(&devp->ibdev);
994 return ERR_PTR(ret);
995 }
996
997 idr_init(&devp->cqidr);
998 idr_init(&devp->qpidr);
999 idr_init(&devp->mmidr);
1000 idr_init(&devp->hwtid_idr);
1001 idr_init(&devp->stid_idr);
1002 idr_init(&devp->atid_idr);
1003 spin_lock_init(&devp->lock);
1004 mutex_init(&devp->rdev.stats.lock);
1005 mutex_init(&devp->db_mutex);
1006 INIT_LIST_HEAD(&devp->db_fc_list);
1007 devp->avail_ird = devp->rdev.lldi.max_ird_adapter;
1008
1009 if (c4iw_debugfs_root) {
1010 devp->debugfs_root = debugfs_create_dir(
1011 pci_name(devp->rdev.lldi.pdev),
1012 c4iw_debugfs_root);
1013 setup_debugfs(devp);
1014 }
1015
1016
1017 return devp;
1018}
1019
1020static void *c4iw_uld_add(const struct cxgb4_lld_info *infop)
1021{
1022 struct uld_ctx *ctx;
1023 static int vers_printed;
1024 int i;
1025
1026 if (!vers_printed++)
1027 pr_info("Chelsio T4/T5 RDMA Driver - version %s\n",
1028 DRV_VERSION);
1029
1030 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
1031 if (!ctx) {
1032 ctx = ERR_PTR(-ENOMEM);
1033 goto out;
1034 }
1035 ctx->lldi = *infop;
1036
1037 PDBG("%s found device %s nchan %u nrxq %u ntxq %u nports %u\n",
1038 __func__, pci_name(ctx->lldi.pdev),
1039 ctx->lldi.nchan, ctx->lldi.nrxq,
1040 ctx->lldi.ntxq, ctx->lldi.nports);
1041
1042 mutex_lock(&dev_mutex);
1043 list_add_tail(&ctx->entry, &uld_ctx_list);
1044 mutex_unlock(&dev_mutex);
1045
1046 for (i = 0; i < ctx->lldi.nrxq; i++)
1047 PDBG("rxqid[%u] %u\n", i, ctx->lldi.rxq_ids[i]);
1048out:
1049 return ctx;
1050}
1051
1052static inline struct sk_buff *copy_gl_to_skb_pkt(const struct pkt_gl *gl,
1053 const __be64 *rsp,
1054 u32 pktshift)
1055{
1056 struct sk_buff *skb;
1057
1058
1059
1060
1061
1062
1063
1064
1065 skb = alloc_skb(gl->tot_len + sizeof(struct cpl_pass_accept_req) +
1066 sizeof(struct rss_header) - pktshift, GFP_ATOMIC);
1067 if (unlikely(!skb))
1068 return NULL;
1069
1070 __skb_put(skb, gl->tot_len + sizeof(struct cpl_pass_accept_req) +
1071 sizeof(struct rss_header) - pktshift);
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081 skb_copy_to_linear_data(skb, rsp, sizeof(struct cpl_pass_accept_req) +
1082 sizeof(struct rss_header));
1083 skb_copy_to_linear_data_offset(skb, sizeof(struct rss_header) +
1084 sizeof(struct cpl_pass_accept_req),
1085 gl->va + pktshift,
1086 gl->tot_len - pktshift);
1087 return skb;
1088}
1089
1090static inline int recv_rx_pkt(struct c4iw_dev *dev, const struct pkt_gl *gl,
1091 const __be64 *rsp)
1092{
1093 unsigned int opcode = *(u8 *)rsp;
1094 struct sk_buff *skb;
1095
1096 if (opcode != CPL_RX_PKT)
1097 goto out;
1098
1099 skb = copy_gl_to_skb_pkt(gl , rsp, dev->rdev.lldi.sge_pktshift);
1100 if (skb == NULL)
1101 goto out;
1102
1103 if (c4iw_handlers[opcode] == NULL) {
1104 pr_info("%s no handler opcode 0x%x...\n", __func__,
1105 opcode);
1106 kfree_skb(skb);
1107 goto out;
1108 }
1109 c4iw_handlers[opcode](dev, skb);
1110 return 1;
1111out:
1112 return 0;
1113}
1114
1115static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp,
1116 const struct pkt_gl *gl)
1117{
1118 struct uld_ctx *ctx = handle;
1119 struct c4iw_dev *dev = ctx->dev;
1120 struct sk_buff *skb;
1121 u8 opcode;
1122
1123 if (gl == NULL) {
1124
1125 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
1126
1127 skb = alloc_skb(256, GFP_ATOMIC);
1128 if (!skb)
1129 goto nomem;
1130 __skb_put(skb, len);
1131 skb_copy_to_linear_data(skb, &rsp[1], len);
1132 } else if (gl == CXGB4_MSG_AN) {
1133 const struct rsp_ctrl *rc = (void *)rsp;
1134
1135 u32 qid = be32_to_cpu(rc->pldbuflen_qid);
1136 c4iw_ev_handler(dev, qid);
1137 return 0;
1138 } else if (unlikely(*(u8 *)rsp != *(u8 *)gl->va)) {
1139 if (recv_rx_pkt(dev, gl, rsp))
1140 return 0;
1141
1142 pr_info("%s: unexpected FL contents at %p, " \
1143 "RSS %#llx, FL %#llx, len %u\n",
1144 pci_name(ctx->lldi.pdev), gl->va,
1145 (unsigned long long)be64_to_cpu(*rsp),
1146 (unsigned long long)be64_to_cpu(
1147 *(__force __be64 *)gl->va),
1148 gl->tot_len);
1149
1150 return 0;
1151 } else {
1152 skb = cxgb4_pktgl_to_skb(gl, 128, 128);
1153 if (unlikely(!skb))
1154 goto nomem;
1155 }
1156
1157 opcode = *(u8 *)rsp;
1158 if (c4iw_handlers[opcode]) {
1159 c4iw_handlers[opcode](dev, skb);
1160 } else {
1161 pr_info("%s no handler opcode 0x%x...\n", __func__,
1162 opcode);
1163 kfree_skb(skb);
1164 }
1165
1166 return 0;
1167nomem:
1168 return -1;
1169}
1170
1171static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state)
1172{
1173 struct uld_ctx *ctx = handle;
1174
1175 PDBG("%s new_state %u\n", __func__, new_state);
1176 switch (new_state) {
1177 case CXGB4_STATE_UP:
1178 printk(KERN_INFO MOD "%s: Up\n", pci_name(ctx->lldi.pdev));
1179 if (!ctx->dev) {
1180 int ret;
1181
1182 ctx->dev = c4iw_alloc(&ctx->lldi);
1183 if (IS_ERR(ctx->dev)) {
1184 printk(KERN_ERR MOD
1185 "%s: initialization failed: %ld\n",
1186 pci_name(ctx->lldi.pdev),
1187 PTR_ERR(ctx->dev));
1188 ctx->dev = NULL;
1189 break;
1190 }
1191 ret = c4iw_register_device(ctx->dev);
1192 if (ret) {
1193 printk(KERN_ERR MOD
1194 "%s: RDMA registration failed: %d\n",
1195 pci_name(ctx->lldi.pdev), ret);
1196 c4iw_dealloc(ctx);
1197 }
1198 }
1199 break;
1200 case CXGB4_STATE_DOWN:
1201 printk(KERN_INFO MOD "%s: Down\n",
1202 pci_name(ctx->lldi.pdev));
1203 if (ctx->dev)
1204 c4iw_remove(ctx);
1205 break;
1206 case CXGB4_STATE_START_RECOVERY:
1207 printk(KERN_INFO MOD "%s: Fatal Error\n",
1208 pci_name(ctx->lldi.pdev));
1209 if (ctx->dev) {
1210 struct ib_event event;
1211
1212 ctx->dev->rdev.flags |= T4_FATAL_ERROR;
1213 memset(&event, 0, sizeof event);
1214 event.event = IB_EVENT_DEVICE_FATAL;
1215 event.device = &ctx->dev->ibdev;
1216 ib_dispatch_event(&event);
1217 c4iw_remove(ctx);
1218 }
1219 break;
1220 case CXGB4_STATE_DETACH:
1221 printk(KERN_INFO MOD "%s: Detach\n",
1222 pci_name(ctx->lldi.pdev));
1223 if (ctx->dev)
1224 c4iw_remove(ctx);
1225 break;
1226 }
1227 return 0;
1228}
1229
1230static int disable_qp_db(int id, void *p, void *data)
1231{
1232 struct c4iw_qp *qp = p;
1233
1234 t4_disable_wq_db(&qp->wq);
1235 return 0;
1236}
1237
1238static void stop_queues(struct uld_ctx *ctx)
1239{
1240 unsigned long flags;
1241
1242 spin_lock_irqsave(&ctx->dev->lock, flags);
1243 ctx->dev->rdev.stats.db_state_transitions++;
1244 ctx->dev->db_state = STOPPED;
1245 if (ctx->dev->rdev.flags & T4_STATUS_PAGE_DISABLED)
1246 idr_for_each(&ctx->dev->qpidr, disable_qp_db, NULL);
1247 else
1248 ctx->dev->rdev.status_page->db_off = 1;
1249 spin_unlock_irqrestore(&ctx->dev->lock, flags);
1250}
1251
1252static int enable_qp_db(int id, void *p, void *data)
1253{
1254 struct c4iw_qp *qp = p;
1255
1256 t4_enable_wq_db(&qp->wq);
1257 return 0;
1258}
1259
1260static void resume_rc_qp(struct c4iw_qp *qp)
1261{
1262 spin_lock(&qp->lock);
1263 t4_ring_sq_db(&qp->wq, qp->wq.sq.wq_pidx_inc, NULL);
1264 qp->wq.sq.wq_pidx_inc = 0;
1265 t4_ring_rq_db(&qp->wq, qp->wq.rq.wq_pidx_inc, NULL);
1266 qp->wq.rq.wq_pidx_inc = 0;
1267 spin_unlock(&qp->lock);
1268}
1269
1270static void resume_a_chunk(struct uld_ctx *ctx)
1271{
1272 int i;
1273 struct c4iw_qp *qp;
1274
1275 for (i = 0; i < DB_FC_RESUME_SIZE; i++) {
1276 qp = list_first_entry(&ctx->dev->db_fc_list, struct c4iw_qp,
1277 db_fc_entry);
1278 list_del_init(&qp->db_fc_entry);
1279 resume_rc_qp(qp);
1280 if (list_empty(&ctx->dev->db_fc_list))
1281 break;
1282 }
1283}
1284
1285static void resume_queues(struct uld_ctx *ctx)
1286{
1287 spin_lock_irq(&ctx->dev->lock);
1288 if (ctx->dev->db_state != STOPPED)
1289 goto out;
1290 ctx->dev->db_state = FLOW_CONTROL;
1291 while (1) {
1292 if (list_empty(&ctx->dev->db_fc_list)) {
1293 WARN_ON(ctx->dev->db_state != FLOW_CONTROL);
1294 ctx->dev->db_state = NORMAL;
1295 ctx->dev->rdev.stats.db_state_transitions++;
1296 if (ctx->dev->rdev.flags & T4_STATUS_PAGE_DISABLED) {
1297 idr_for_each(&ctx->dev->qpidr, enable_qp_db,
1298 NULL);
1299 } else {
1300 ctx->dev->rdev.status_page->db_off = 0;
1301 }
1302 break;
1303 } else {
1304 if (cxgb4_dbfifo_count(ctx->dev->rdev.lldi.ports[0], 1)
1305 < (ctx->dev->rdev.lldi.dbfifo_int_thresh <<
1306 DB_FC_DRAIN_THRESH)) {
1307 resume_a_chunk(ctx);
1308 }
1309 if (!list_empty(&ctx->dev->db_fc_list)) {
1310 spin_unlock_irq(&ctx->dev->lock);
1311 if (DB_FC_RESUME_DELAY) {
1312 set_current_state(TASK_UNINTERRUPTIBLE);
1313 schedule_timeout(DB_FC_RESUME_DELAY);
1314 }
1315 spin_lock_irq(&ctx->dev->lock);
1316 if (ctx->dev->db_state != FLOW_CONTROL)
1317 break;
1318 }
1319 }
1320 }
1321out:
1322 if (ctx->dev->db_state != NORMAL)
1323 ctx->dev->rdev.stats.db_fc_interruptions++;
1324 spin_unlock_irq(&ctx->dev->lock);
1325}
1326
1327struct qp_list {
1328 unsigned idx;
1329 struct c4iw_qp **qps;
1330};
1331
1332static int add_and_ref_qp(int id, void *p, void *data)
1333{
1334 struct qp_list *qp_listp = data;
1335 struct c4iw_qp *qp = p;
1336
1337 c4iw_qp_add_ref(&qp->ibqp);
1338 qp_listp->qps[qp_listp->idx++] = qp;
1339 return 0;
1340}
1341
1342static int count_qps(int id, void *p, void *data)
1343{
1344 unsigned *countp = data;
1345 (*countp)++;
1346 return 0;
1347}
1348
1349static void deref_qps(struct qp_list *qp_list)
1350{
1351 int idx;
1352
1353 for (idx = 0; idx < qp_list->idx; idx++)
1354 c4iw_qp_rem_ref(&qp_list->qps[idx]->ibqp);
1355}
1356
1357static void recover_lost_dbs(struct uld_ctx *ctx, struct qp_list *qp_list)
1358{
1359 int idx;
1360 int ret;
1361
1362 for (idx = 0; idx < qp_list->idx; idx++) {
1363 struct c4iw_qp *qp = qp_list->qps[idx];
1364
1365 spin_lock_irq(&qp->rhp->lock);
1366 spin_lock(&qp->lock);
1367 ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0],
1368 qp->wq.sq.qid,
1369 t4_sq_host_wq_pidx(&qp->wq),
1370 t4_sq_wq_size(&qp->wq));
1371 if (ret) {
1372 pr_err(MOD "%s: Fatal error - "
1373 "DB overflow recovery failed - "
1374 "error syncing SQ qid %u\n",
1375 pci_name(ctx->lldi.pdev), qp->wq.sq.qid);
1376 spin_unlock(&qp->lock);
1377 spin_unlock_irq(&qp->rhp->lock);
1378 return;
1379 }
1380 qp->wq.sq.wq_pidx_inc = 0;
1381
1382 ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0],
1383 qp->wq.rq.qid,
1384 t4_rq_host_wq_pidx(&qp->wq),
1385 t4_rq_wq_size(&qp->wq));
1386
1387 if (ret) {
1388 pr_err(MOD "%s: Fatal error - "
1389 "DB overflow recovery failed - "
1390 "error syncing RQ qid %u\n",
1391 pci_name(ctx->lldi.pdev), qp->wq.rq.qid);
1392 spin_unlock(&qp->lock);
1393 spin_unlock_irq(&qp->rhp->lock);
1394 return;
1395 }
1396 qp->wq.rq.wq_pidx_inc = 0;
1397 spin_unlock(&qp->lock);
1398 spin_unlock_irq(&qp->rhp->lock);
1399
1400
1401 while (cxgb4_dbfifo_count(qp->rhp->rdev.lldi.ports[0], 1) > 0) {
1402 set_current_state(TASK_UNINTERRUPTIBLE);
1403 schedule_timeout(usecs_to_jiffies(10));
1404 }
1405 }
1406}
1407
1408static void recover_queues(struct uld_ctx *ctx)
1409{
1410 int count = 0;
1411 struct qp_list qp_list;
1412 int ret;
1413
1414
1415 set_current_state(TASK_UNINTERRUPTIBLE);
1416 schedule_timeout(usecs_to_jiffies(1000));
1417
1418
1419 ret = cxgb4_flush_eq_cache(ctx->dev->rdev.lldi.ports[0]);
1420 if (ret) {
1421 printk(KERN_ERR MOD "%s: Fatal error - DB overflow recovery failed\n",
1422 pci_name(ctx->lldi.pdev));
1423 return;
1424 }
1425
1426
1427 spin_lock_irq(&ctx->dev->lock);
1428 WARN_ON(ctx->dev->db_state != STOPPED);
1429 ctx->dev->db_state = RECOVERY;
1430 idr_for_each(&ctx->dev->qpidr, count_qps, &count);
1431
1432 qp_list.qps = kzalloc(count * sizeof *qp_list.qps, GFP_ATOMIC);
1433 if (!qp_list.qps) {
1434 printk(KERN_ERR MOD "%s: Fatal error - DB overflow recovery failed\n",
1435 pci_name(ctx->lldi.pdev));
1436 spin_unlock_irq(&ctx->dev->lock);
1437 return;
1438 }
1439 qp_list.idx = 0;
1440
1441
1442 idr_for_each(&ctx->dev->qpidr, add_and_ref_qp, &qp_list);
1443
1444 spin_unlock_irq(&ctx->dev->lock);
1445
1446
1447 recover_lost_dbs(ctx, &qp_list);
1448
1449
1450 deref_qps(&qp_list);
1451 kfree(qp_list.qps);
1452
1453 spin_lock_irq(&ctx->dev->lock);
1454 WARN_ON(ctx->dev->db_state != RECOVERY);
1455 ctx->dev->db_state = STOPPED;
1456 spin_unlock_irq(&ctx->dev->lock);
1457}
1458
1459static int c4iw_uld_control(void *handle, enum cxgb4_control control, ...)
1460{
1461 struct uld_ctx *ctx = handle;
1462
1463 switch (control) {
1464 case CXGB4_CONTROL_DB_FULL:
1465 stop_queues(ctx);
1466 ctx->dev->rdev.stats.db_full++;
1467 break;
1468 case CXGB4_CONTROL_DB_EMPTY:
1469 resume_queues(ctx);
1470 mutex_lock(&ctx->dev->rdev.stats.lock);
1471 ctx->dev->rdev.stats.db_empty++;
1472 mutex_unlock(&ctx->dev->rdev.stats.lock);
1473 break;
1474 case CXGB4_CONTROL_DB_DROP:
1475 recover_queues(ctx);
1476 mutex_lock(&ctx->dev->rdev.stats.lock);
1477 ctx->dev->rdev.stats.db_drop++;
1478 mutex_unlock(&ctx->dev->rdev.stats.lock);
1479 break;
1480 default:
1481 printk(KERN_WARNING MOD "%s: unknown control cmd %u\n",
1482 pci_name(ctx->lldi.pdev), control);
1483 break;
1484 }
1485 return 0;
1486}
1487
1488static struct cxgb4_uld_info c4iw_uld_info = {
1489 .name = DRV_NAME,
1490 .add = c4iw_uld_add,
1491 .rx_handler = c4iw_uld_rx_handler,
1492 .state_change = c4iw_uld_state_change,
1493 .control = c4iw_uld_control,
1494};
1495
1496static int __init c4iw_init_module(void)
1497{
1498 int err;
1499
1500 err = c4iw_cm_init();
1501 if (err)
1502 return err;
1503
1504 c4iw_debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
1505 if (!c4iw_debugfs_root)
1506 printk(KERN_WARNING MOD
1507 "could not create debugfs entry, continuing\n");
1508
1509 if (ibnl_add_client(RDMA_NL_C4IW, RDMA_NL_IWPM_NUM_OPS,
1510 c4iw_nl_cb_table))
1511 pr_err("%s[%u]: Failed to add netlink callback\n"
1512 , __func__, __LINE__);
1513
1514 err = iwpm_init(RDMA_NL_C4IW);
1515 if (err) {
1516 pr_err("port mapper initialization failed with %d\n", err);
1517 ibnl_remove_client(RDMA_NL_C4IW);
1518 c4iw_cm_term();
1519 debugfs_remove_recursive(c4iw_debugfs_root);
1520 return err;
1521 }
1522
1523 cxgb4_register_uld(CXGB4_ULD_RDMA, &c4iw_uld_info);
1524
1525 return 0;
1526}
1527
1528static void __exit c4iw_exit_module(void)
1529{
1530 struct uld_ctx *ctx, *tmp;
1531
1532 mutex_lock(&dev_mutex);
1533 list_for_each_entry_safe(ctx, tmp, &uld_ctx_list, entry) {
1534 if (ctx->dev)
1535 c4iw_remove(ctx);
1536 kfree(ctx);
1537 }
1538 mutex_unlock(&dev_mutex);
1539 cxgb4_unregister_uld(CXGB4_ULD_RDMA);
1540 iwpm_exit(RDMA_NL_C4IW);
1541 ibnl_remove_client(RDMA_NL_C4IW);
1542 c4iw_cm_term();
1543 debugfs_remove_recursive(c4iw_debugfs_root);
1544}
1545
1546module_init(c4iw_init_module);
1547module_exit(c4iw_exit_module);
1548
