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>
36 #include <linux/math64.h>
38 #include <rdma/ib_verbs.h>
42 #define DRV_VERSION "0.1"
44 MODULE_AUTHOR("Steve Wise");
45 MODULE_DESCRIPTION("Chelsio T4/T5 RDMA Driver");
46 MODULE_LICENSE("Dual BSD/GPL");
47 MODULE_VERSION(DRV_VERSION
);
49 static int allow_db_fc_on_t5
;
50 module_param(allow_db_fc_on_t5
, int, 0644);
51 MODULE_PARM_DESC(allow_db_fc_on_t5
,
52 "Allow DB Flow Control on T5 (default = 0)");
54 static int allow_db_coalescing_on_t5
;
55 module_param(allow_db_coalescing_on_t5
, int, 0644);
56 MODULE_PARM_DESC(allow_db_coalescing_on_t5
,
57 "Allow DB Coalescing on T5 (default = 0)");
60 module_param(c4iw_wr_log
, int, 0444);
61 MODULE_PARM_DESC(c4iw_wr_log
, "Enables logging of work request timing data.");
63 static int c4iw_wr_log_size_order
= 12;
64 module_param(c4iw_wr_log_size_order
, int, 0444);
65 MODULE_PARM_DESC(c4iw_wr_log_size_order
,
66 "Number of entries (log2) in the work request timing log.");
69 struct list_head entry
;
70 struct cxgb4_lld_info lldi
;
74 static LIST_HEAD(uld_ctx_list
);
75 static DEFINE_MUTEX(dev_mutex
);
77 #define DB_FC_RESUME_SIZE 64
78 #define DB_FC_RESUME_DELAY 1
79 #define DB_FC_DRAIN_THRESH 0
81 static struct dentry
*c4iw_debugfs_root
;
83 struct c4iw_debugfs_data
{
84 struct c4iw_dev
*devp
;
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 void c4iw_log_wr_stats(struct t4_wq
*wq
, struct t4_cqe
*cqe
)
108 struct wr_log_entry le
;
111 if (!wq
->rdev
->wr_log
)
114 idx
= (atomic_inc_return(&wq
->rdev
->wr_log_idx
) - 1) &
115 (wq
->rdev
->wr_log_size
- 1);
116 le
.poll_sge_ts
= cxgb4_read_sge_timestamp(wq
->rdev
->lldi
.ports
[0]);
117 getnstimeofday(&le
.poll_host_ts
);
119 le
.cqe_sge_ts
= CQE_TS(cqe
);
122 le
.opcode
= CQE_OPCODE(cqe
);
123 le
.post_host_ts
= wq
->sq
.sw_sq
[wq
->sq
.cidx
].host_ts
;
124 le
.post_sge_ts
= wq
->sq
.sw_sq
[wq
->sq
.cidx
].sge_ts
;
125 le
.wr_id
= CQE_WRID_SQ_IDX(cqe
);
128 le
.opcode
= FW_RI_RECEIVE
;
129 le
.post_host_ts
= wq
->rq
.sw_rq
[wq
->rq
.cidx
].host_ts
;
130 le
.post_sge_ts
= wq
->rq
.sw_rq
[wq
->rq
.cidx
].sge_ts
;
131 le
.wr_id
= CQE_WRID_MSN(cqe
);
133 wq
->rdev
->wr_log
[idx
] = le
;
136 static int wr_log_show(struct seq_file
*seq
, void *v
)
138 struct c4iw_dev
*dev
= seq
->private;
139 struct timespec prev_ts
= {0, 0};
140 struct wr_log_entry
*lep
;
144 #define ts2ns(ts) div64_u64((ts) * dev->rdev.lldi.cclk_ps, 1000)
146 idx
= atomic_read(&dev
->rdev
.wr_log_idx
) &
147 (dev
->rdev
.wr_log_size
- 1);
150 end
= dev
->rdev
.wr_log_size
- 1;
151 lep
= &dev
->rdev
.wr_log
[idx
];
156 prev_ts
= lep
->poll_host_ts
;
158 seq_printf(seq
, "%04u: sec %lu nsec %lu qid %u opcode "
159 "%u %s 0x%x host_wr_delta sec %lu nsec %lu "
160 "post_sge_ts 0x%llx cqe_sge_ts 0x%llx "
161 "poll_sge_ts 0x%llx post_poll_delta_ns %llu "
162 "cqe_poll_delta_ns %llu\n",
164 timespec_sub(lep
->poll_host_ts
,
166 timespec_sub(lep
->poll_host_ts
,
168 lep
->qid
, lep
->opcode
,
169 lep
->opcode
== FW_RI_RECEIVE
?
172 timespec_sub(lep
->poll_host_ts
,
173 lep
->post_host_ts
).tv_sec
,
174 timespec_sub(lep
->poll_host_ts
,
175 lep
->post_host_ts
).tv_nsec
,
176 lep
->post_sge_ts
, lep
->cqe_sge_ts
,
178 ts2ns(lep
->poll_sge_ts
- lep
->post_sge_ts
),
179 ts2ns(lep
->poll_sge_ts
- lep
->cqe_sge_ts
));
180 prev_ts
= lep
->poll_host_ts
;
183 if (idx
> (dev
->rdev
.wr_log_size
- 1))
185 lep
= &dev
->rdev
.wr_log
[idx
];
191 static int wr_log_open(struct inode
*inode
, struct file
*file
)
193 return single_open(file
, wr_log_show
, inode
->i_private
);
196 static ssize_t
wr_log_clear(struct file
*file
, const char __user
*buf
,
197 size_t count
, loff_t
*pos
)
199 struct c4iw_dev
*dev
= ((struct seq_file
*)file
->private_data
)->private;
202 if (dev
->rdev
.wr_log
)
203 for (i
= 0; i
< dev
->rdev
.wr_log_size
; i
++)
204 dev
->rdev
.wr_log
[i
].valid
= 0;
208 static const struct file_operations wr_log_debugfs_fops
= {
209 .owner
= THIS_MODULE
,
211 .release
= single_release
,
214 .write
= wr_log_clear
,
217 static int dump_qp(int id
, void *p
, void *data
)
219 struct c4iw_qp
*qp
= p
;
220 struct c4iw_debugfs_data
*qpd
= data
;
224 if (id
!= qp
->wq
.sq
.qid
)
227 space
= qpd
->bufsize
- qpd
->pos
- 1;
232 if (qp
->ep
->com
.local_addr
.ss_family
== AF_INET
) {
233 struct sockaddr_in
*lsin
= (struct sockaddr_in
*)
234 &qp
->ep
->com
.cm_id
->local_addr
;
235 struct sockaddr_in
*rsin
= (struct sockaddr_in
*)
236 &qp
->ep
->com
.cm_id
->remote_addr
;
237 struct sockaddr_in
*mapped_lsin
= (struct sockaddr_in
*)
238 &qp
->ep
->com
.cm_id
->m_local_addr
;
239 struct sockaddr_in
*mapped_rsin
= (struct sockaddr_in
*)
240 &qp
->ep
->com
.cm_id
->m_remote_addr
;
242 cc
= snprintf(qpd
->buf
+ qpd
->pos
, space
,
243 "rc qp sq id %u rq id %u state %u "
244 "onchip %u ep tid %u state %u "
245 "%pI4:%u/%u->%pI4:%u/%u\n",
246 qp
->wq
.sq
.qid
, qp
->wq
.rq
.qid
,
248 qp
->wq
.sq
.flags
& T4_SQ_ONCHIP
,
249 qp
->ep
->hwtid
, (int)qp
->ep
->com
.state
,
250 &lsin
->sin_addr
, ntohs(lsin
->sin_port
),
251 ntohs(mapped_lsin
->sin_port
),
252 &rsin
->sin_addr
, ntohs(rsin
->sin_port
),
253 ntohs(mapped_rsin
->sin_port
));
255 struct sockaddr_in6
*lsin6
= (struct sockaddr_in6
*)
256 &qp
->ep
->com
.cm_id
->local_addr
;
257 struct sockaddr_in6
*rsin6
= (struct sockaddr_in6
*)
258 &qp
->ep
->com
.cm_id
->remote_addr
;
259 struct sockaddr_in6
*mapped_lsin6
=
260 (struct sockaddr_in6
*)
261 &qp
->ep
->com
.cm_id
->m_local_addr
;
262 struct sockaddr_in6
*mapped_rsin6
=
263 (struct sockaddr_in6
*)
264 &qp
->ep
->com
.cm_id
->m_remote_addr
;
266 cc
= snprintf(qpd
->buf
+ qpd
->pos
, space
,
267 "rc qp sq id %u rq id %u state %u "
268 "onchip %u ep tid %u state %u "
269 "%pI6:%u/%u->%pI6:%u/%u\n",
270 qp
->wq
.sq
.qid
, qp
->wq
.rq
.qid
,
272 qp
->wq
.sq
.flags
& T4_SQ_ONCHIP
,
273 qp
->ep
->hwtid
, (int)qp
->ep
->com
.state
,
275 ntohs(lsin6
->sin6_port
),
276 ntohs(mapped_lsin6
->sin6_port
),
278 ntohs(rsin6
->sin6_port
),
279 ntohs(mapped_rsin6
->sin6_port
));
282 cc
= snprintf(qpd
->buf
+ qpd
->pos
, space
,
283 "qp sq id %u rq id %u state %u onchip %u\n",
284 qp
->wq
.sq
.qid
, qp
->wq
.rq
.qid
,
286 qp
->wq
.sq
.flags
& T4_SQ_ONCHIP
);
292 static int qp_release(struct inode
*inode
, struct file
*file
)
294 struct c4iw_debugfs_data
*qpd
= file
->private_data
;
296 printk(KERN_INFO
"%s null qpd?\n", __func__
);
304 static int qp_open(struct inode
*inode
, struct file
*file
)
306 struct c4iw_debugfs_data
*qpd
;
309 qpd
= kmalloc(sizeof *qpd
, GFP_KERNEL
);
313 qpd
->devp
= inode
->i_private
;
316 spin_lock_irq(&qpd
->devp
->lock
);
317 idr_for_each(&qpd
->devp
->qpidr
, count_idrs
, &count
);
318 spin_unlock_irq(&qpd
->devp
->lock
);
320 qpd
->bufsize
= count
* 180;
321 qpd
->buf
= vmalloc(qpd
->bufsize
);
327 spin_lock_irq(&qpd
->devp
->lock
);
328 idr_for_each(&qpd
->devp
->qpidr
, dump_qp
, qpd
);
329 spin_unlock_irq(&qpd
->devp
->lock
);
331 qpd
->buf
[qpd
->pos
++] = 0;
332 file
->private_data
= qpd
;
336 static const struct file_operations qp_debugfs_fops
= {
337 .owner
= THIS_MODULE
,
339 .release
= qp_release
,
340 .read
= debugfs_read
,
341 .llseek
= default_llseek
,
344 static int dump_stag(int id
, void *p
, void *data
)
346 struct c4iw_debugfs_data
*stagd
= data
;
349 struct fw_ri_tpte tpte
;
352 space
= stagd
->bufsize
- stagd
->pos
- 1;
356 ret
= cxgb4_read_tpte(stagd
->devp
->rdev
.lldi
.ports
[0], (u32
)id
<<8,
359 dev_err(&stagd
->devp
->rdev
.lldi
.pdev
->dev
,
360 "%s cxgb4_read_tpte err %d\n", __func__
, ret
);
363 cc
= snprintf(stagd
->buf
+ stagd
->pos
, space
,
364 "stag: idx 0x%x valid %d key 0x%x state %d pdid %d "
365 "perm 0x%x ps %d len 0x%llx va 0x%llx\n",
367 FW_RI_TPTE_VALID_G(ntohl(tpte
.valid_to_pdid
)),
368 FW_RI_TPTE_STAGKEY_G(ntohl(tpte
.valid_to_pdid
)),
369 FW_RI_TPTE_STAGSTATE_G(ntohl(tpte
.valid_to_pdid
)),
370 FW_RI_TPTE_PDID_G(ntohl(tpte
.valid_to_pdid
)),
371 FW_RI_TPTE_PERM_G(ntohl(tpte
.locread_to_qpid
)),
372 FW_RI_TPTE_PS_G(ntohl(tpte
.locread_to_qpid
)),
373 ((u64
)ntohl(tpte
.len_hi
) << 32) | ntohl(tpte
.len_lo
),
374 ((u64
)ntohl(tpte
.va_hi
) << 32) | ntohl(tpte
.va_lo_fbo
));
380 static int stag_release(struct inode
*inode
, struct file
*file
)
382 struct c4iw_debugfs_data
*stagd
= file
->private_data
;
384 printk(KERN_INFO
"%s null stagd?\n", __func__
);
392 static int stag_open(struct inode
*inode
, struct file
*file
)
394 struct c4iw_debugfs_data
*stagd
;
398 stagd
= kmalloc(sizeof *stagd
, GFP_KERNEL
);
403 stagd
->devp
= inode
->i_private
;
406 spin_lock_irq(&stagd
->devp
->lock
);
407 idr_for_each(&stagd
->devp
->mmidr
, count_idrs
, &count
);
408 spin_unlock_irq(&stagd
->devp
->lock
);
410 stagd
->bufsize
= count
* 256;
411 stagd
->buf
= vmalloc(stagd
->bufsize
);
417 spin_lock_irq(&stagd
->devp
->lock
);
418 idr_for_each(&stagd
->devp
->mmidr
, dump_stag
, stagd
);
419 spin_unlock_irq(&stagd
->devp
->lock
);
421 stagd
->buf
[stagd
->pos
++] = 0;
422 file
->private_data
= stagd
;
430 static const struct file_operations stag_debugfs_fops
= {
431 .owner
= THIS_MODULE
,
433 .release
= stag_release
,
434 .read
= debugfs_read
,
435 .llseek
= default_llseek
,
438 static char *db_state_str
[] = {"NORMAL", "FLOW_CONTROL", "RECOVERY", "STOPPED"};
440 static int stats_show(struct seq_file
*seq
, void *v
)
442 struct c4iw_dev
*dev
= seq
->private;
444 seq_printf(seq
, " Object: %10s %10s %10s %10s\n", "Total", "Current",
446 seq_printf(seq
, " PDID: %10llu %10llu %10llu %10llu\n",
447 dev
->rdev
.stats
.pd
.total
, dev
->rdev
.stats
.pd
.cur
,
448 dev
->rdev
.stats
.pd
.max
, dev
->rdev
.stats
.pd
.fail
);
449 seq_printf(seq
, " QID: %10llu %10llu %10llu %10llu\n",
450 dev
->rdev
.stats
.qid
.total
, dev
->rdev
.stats
.qid
.cur
,
451 dev
->rdev
.stats
.qid
.max
, dev
->rdev
.stats
.qid
.fail
);
452 seq_printf(seq
, " TPTMEM: %10llu %10llu %10llu %10llu\n",
453 dev
->rdev
.stats
.stag
.total
, dev
->rdev
.stats
.stag
.cur
,
454 dev
->rdev
.stats
.stag
.max
, dev
->rdev
.stats
.stag
.fail
);
455 seq_printf(seq
, " PBLMEM: %10llu %10llu %10llu %10llu\n",
456 dev
->rdev
.stats
.pbl
.total
, dev
->rdev
.stats
.pbl
.cur
,
457 dev
->rdev
.stats
.pbl
.max
, dev
->rdev
.stats
.pbl
.fail
);
458 seq_printf(seq
, " RQTMEM: %10llu %10llu %10llu %10llu\n",
459 dev
->rdev
.stats
.rqt
.total
, dev
->rdev
.stats
.rqt
.cur
,
460 dev
->rdev
.stats
.rqt
.max
, dev
->rdev
.stats
.rqt
.fail
);
461 seq_printf(seq
, " OCQPMEM: %10llu %10llu %10llu %10llu\n",
462 dev
->rdev
.stats
.ocqp
.total
, dev
->rdev
.stats
.ocqp
.cur
,
463 dev
->rdev
.stats
.ocqp
.max
, dev
->rdev
.stats
.ocqp
.fail
);
464 seq_printf(seq
, " DB FULL: %10llu\n", dev
->rdev
.stats
.db_full
);
465 seq_printf(seq
, " DB EMPTY: %10llu\n", dev
->rdev
.stats
.db_empty
);
466 seq_printf(seq
, " DB DROP: %10llu\n", dev
->rdev
.stats
.db_drop
);
467 seq_printf(seq
, " DB State: %s Transitions %llu FC Interruptions %llu\n",
468 db_state_str
[dev
->db_state
],
469 dev
->rdev
.stats
.db_state_transitions
,
470 dev
->rdev
.stats
.db_fc_interruptions
);
471 seq_printf(seq
, "TCAM_FULL: %10llu\n", dev
->rdev
.stats
.tcam_full
);
472 seq_printf(seq
, "ACT_OFLD_CONN_FAILS: %10llu\n",
473 dev
->rdev
.stats
.act_ofld_conn_fails
);
474 seq_printf(seq
, "PAS_OFLD_CONN_FAILS: %10llu\n",
475 dev
->rdev
.stats
.pas_ofld_conn_fails
);
476 seq_printf(seq
, "NEG_ADV_RCVD: %10llu\n", dev
->rdev
.stats
.neg_adv
);
477 seq_printf(seq
, "AVAILABLE IRD: %10u\n", dev
->avail_ird
);
481 static int stats_open(struct inode
*inode
, struct file
*file
)
483 return single_open(file
, stats_show
, inode
->i_private
);
486 static ssize_t
stats_clear(struct file
*file
, const char __user
*buf
,
487 size_t count
, loff_t
*pos
)
489 struct c4iw_dev
*dev
= ((struct seq_file
*)file
->private_data
)->private;
491 mutex_lock(&dev
->rdev
.stats
.lock
);
492 dev
->rdev
.stats
.pd
.max
= 0;
493 dev
->rdev
.stats
.pd
.fail
= 0;
494 dev
->rdev
.stats
.qid
.max
= 0;
495 dev
->rdev
.stats
.qid
.fail
= 0;
496 dev
->rdev
.stats
.stag
.max
= 0;
497 dev
->rdev
.stats
.stag
.fail
= 0;
498 dev
->rdev
.stats
.pbl
.max
= 0;
499 dev
->rdev
.stats
.pbl
.fail
= 0;
500 dev
->rdev
.stats
.rqt
.max
= 0;
501 dev
->rdev
.stats
.rqt
.fail
= 0;
502 dev
->rdev
.stats
.ocqp
.max
= 0;
503 dev
->rdev
.stats
.ocqp
.fail
= 0;
504 dev
->rdev
.stats
.db_full
= 0;
505 dev
->rdev
.stats
.db_empty
= 0;
506 dev
->rdev
.stats
.db_drop
= 0;
507 dev
->rdev
.stats
.db_state_transitions
= 0;
508 dev
->rdev
.stats
.tcam_full
= 0;
509 dev
->rdev
.stats
.act_ofld_conn_fails
= 0;
510 dev
->rdev
.stats
.pas_ofld_conn_fails
= 0;
511 mutex_unlock(&dev
->rdev
.stats
.lock
);
515 static const struct file_operations stats_debugfs_fops
= {
516 .owner
= THIS_MODULE
,
518 .release
= single_release
,
521 .write
= stats_clear
,
524 static int dump_ep(int id
, void *p
, void *data
)
526 struct c4iw_ep
*ep
= p
;
527 struct c4iw_debugfs_data
*epd
= data
;
531 space
= epd
->bufsize
- epd
->pos
- 1;
535 if (ep
->com
.local_addr
.ss_family
== AF_INET
) {
536 struct sockaddr_in
*lsin
= (struct sockaddr_in
*)
537 &ep
->com
.cm_id
->local_addr
;
538 struct sockaddr_in
*rsin
= (struct sockaddr_in
*)
539 &ep
->com
.cm_id
->remote_addr
;
540 struct sockaddr_in
*mapped_lsin
= (struct sockaddr_in
*)
541 &ep
->com
.cm_id
->m_local_addr
;
542 struct sockaddr_in
*mapped_rsin
= (struct sockaddr_in
*)
543 &ep
->com
.cm_id
->m_remote_addr
;
545 cc
= snprintf(epd
->buf
+ epd
->pos
, space
,
546 "ep %p cm_id %p qp %p state %d flags 0x%lx "
547 "history 0x%lx hwtid %d atid %d "
548 "conn_na %u abort_na %u "
549 "%pI4:%d/%d <-> %pI4:%d/%d\n",
550 ep
, ep
->com
.cm_id
, ep
->com
.qp
,
551 (int)ep
->com
.state
, ep
->com
.flags
,
552 ep
->com
.history
, ep
->hwtid
, ep
->atid
,
553 ep
->stats
.connect_neg_adv
,
554 ep
->stats
.abort_neg_adv
,
555 &lsin
->sin_addr
, ntohs(lsin
->sin_port
),
556 ntohs(mapped_lsin
->sin_port
),
557 &rsin
->sin_addr
, ntohs(rsin
->sin_port
),
558 ntohs(mapped_rsin
->sin_port
));
560 struct sockaddr_in6
*lsin6
= (struct sockaddr_in6
*)
561 &ep
->com
.cm_id
->local_addr
;
562 struct sockaddr_in6
*rsin6
= (struct sockaddr_in6
*)
563 &ep
->com
.cm_id
->remote_addr
;
564 struct sockaddr_in6
*mapped_lsin6
= (struct sockaddr_in6
*)
565 &ep
->com
.cm_id
->m_local_addr
;
566 struct sockaddr_in6
*mapped_rsin6
= (struct sockaddr_in6
*)
567 &ep
->com
.cm_id
->m_remote_addr
;
569 cc
= snprintf(epd
->buf
+ epd
->pos
, space
,
570 "ep %p cm_id %p qp %p state %d flags 0x%lx "
571 "history 0x%lx hwtid %d atid %d "
572 "conn_na %u abort_na %u "
573 "%pI6:%d/%d <-> %pI6:%d/%d\n",
574 ep
, ep
->com
.cm_id
, ep
->com
.qp
,
575 (int)ep
->com
.state
, ep
->com
.flags
,
576 ep
->com
.history
, ep
->hwtid
, ep
->atid
,
577 ep
->stats
.connect_neg_adv
,
578 ep
->stats
.abort_neg_adv
,
579 &lsin6
->sin6_addr
, ntohs(lsin6
->sin6_port
),
580 ntohs(mapped_lsin6
->sin6_port
),
581 &rsin6
->sin6_addr
, ntohs(rsin6
->sin6_port
),
582 ntohs(mapped_rsin6
->sin6_port
));
589 static int dump_listen_ep(int id
, void *p
, void *data
)
591 struct c4iw_listen_ep
*ep
= p
;
592 struct c4iw_debugfs_data
*epd
= data
;
596 space
= epd
->bufsize
- epd
->pos
- 1;
600 if (ep
->com
.local_addr
.ss_family
== AF_INET
) {
601 struct sockaddr_in
*lsin
= (struct sockaddr_in
*)
602 &ep
->com
.cm_id
->local_addr
;
603 struct sockaddr_in
*mapped_lsin
= (struct sockaddr_in
*)
604 &ep
->com
.cm_id
->m_local_addr
;
606 cc
= snprintf(epd
->buf
+ epd
->pos
, space
,
607 "ep %p cm_id %p state %d flags 0x%lx stid %d "
608 "backlog %d %pI4:%d/%d\n",
609 ep
, ep
->com
.cm_id
, (int)ep
->com
.state
,
610 ep
->com
.flags
, ep
->stid
, ep
->backlog
,
611 &lsin
->sin_addr
, ntohs(lsin
->sin_port
),
612 ntohs(mapped_lsin
->sin_port
));
614 struct sockaddr_in6
*lsin6
= (struct sockaddr_in6
*)
615 &ep
->com
.cm_id
->local_addr
;
616 struct sockaddr_in6
*mapped_lsin6
= (struct sockaddr_in6
*)
617 &ep
->com
.cm_id
->m_local_addr
;
619 cc
= snprintf(epd
->buf
+ epd
->pos
, space
,
620 "ep %p cm_id %p state %d flags 0x%lx stid %d "
621 "backlog %d %pI6:%d/%d\n",
622 ep
, ep
->com
.cm_id
, (int)ep
->com
.state
,
623 ep
->com
.flags
, ep
->stid
, ep
->backlog
,
624 &lsin6
->sin6_addr
, ntohs(lsin6
->sin6_port
),
625 ntohs(mapped_lsin6
->sin6_port
));
632 static int ep_release(struct inode
*inode
, struct file
*file
)
634 struct c4iw_debugfs_data
*epd
= file
->private_data
;
636 pr_info("%s null qpd?\n", __func__
);
644 static int ep_open(struct inode
*inode
, struct file
*file
)
646 struct c4iw_debugfs_data
*epd
;
650 epd
= kmalloc(sizeof(*epd
), GFP_KERNEL
);
655 epd
->devp
= inode
->i_private
;
658 spin_lock_irq(&epd
->devp
->lock
);
659 idr_for_each(&epd
->devp
->hwtid_idr
, count_idrs
, &count
);
660 idr_for_each(&epd
->devp
->atid_idr
, count_idrs
, &count
);
661 idr_for_each(&epd
->devp
->stid_idr
, count_idrs
, &count
);
662 spin_unlock_irq(&epd
->devp
->lock
);
664 epd
->bufsize
= count
* 240;
665 epd
->buf
= vmalloc(epd
->bufsize
);
671 spin_lock_irq(&epd
->devp
->lock
);
672 idr_for_each(&epd
->devp
->hwtid_idr
, dump_ep
, epd
);
673 idr_for_each(&epd
->devp
->atid_idr
, dump_ep
, epd
);
674 idr_for_each(&epd
->devp
->stid_idr
, dump_listen_ep
, epd
);
675 spin_unlock_irq(&epd
->devp
->lock
);
677 file
->private_data
= epd
;
685 static const struct file_operations ep_debugfs_fops
= {
686 .owner
= THIS_MODULE
,
688 .release
= ep_release
,
689 .read
= debugfs_read
,
692 static int setup_debugfs(struct c4iw_dev
*devp
)
694 if (!devp
->debugfs_root
)
697 debugfs_create_file_size("qps", S_IWUSR
, devp
->debugfs_root
,
698 (void *)devp
, &qp_debugfs_fops
, 4096);
700 debugfs_create_file_size("stags", S_IWUSR
, devp
->debugfs_root
,
701 (void *)devp
, &stag_debugfs_fops
, 4096);
703 debugfs_create_file_size("stats", S_IWUSR
, devp
->debugfs_root
,
704 (void *)devp
, &stats_debugfs_fops
, 4096);
706 debugfs_create_file_size("eps", S_IWUSR
, devp
->debugfs_root
,
707 (void *)devp
, &ep_debugfs_fops
, 4096);
710 debugfs_create_file_size("wr_log", S_IWUSR
, devp
->debugfs_root
,
711 (void *)devp
, &wr_log_debugfs_fops
, 4096);
715 void c4iw_release_dev_ucontext(struct c4iw_rdev
*rdev
,
716 struct c4iw_dev_ucontext
*uctx
)
718 struct list_head
*pos
, *nxt
;
719 struct c4iw_qid_list
*entry
;
721 mutex_lock(&uctx
->lock
);
722 list_for_each_safe(pos
, nxt
, &uctx
->qpids
) {
723 entry
= list_entry(pos
, struct c4iw_qid_list
, entry
);
724 list_del_init(&entry
->entry
);
725 if (!(entry
->qid
& rdev
->qpmask
)) {
726 c4iw_put_resource(&rdev
->resource
.qid_table
,
728 mutex_lock(&rdev
->stats
.lock
);
729 rdev
->stats
.qid
.cur
-= rdev
->qpmask
+ 1;
730 mutex_unlock(&rdev
->stats
.lock
);
735 list_for_each_safe(pos
, nxt
, &uctx
->qpids
) {
736 entry
= list_entry(pos
, struct c4iw_qid_list
, entry
);
737 list_del_init(&entry
->entry
);
740 mutex_unlock(&uctx
->lock
);
743 void c4iw_init_dev_ucontext(struct c4iw_rdev
*rdev
,
744 struct c4iw_dev_ucontext
*uctx
)
746 INIT_LIST_HEAD(&uctx
->qpids
);
747 INIT_LIST_HEAD(&uctx
->cqids
);
748 mutex_init(&uctx
->lock
);
751 /* Caller takes care of locking if needed */
752 static int c4iw_rdev_open(struct c4iw_rdev
*rdev
)
756 c4iw_init_dev_ucontext(rdev
, &rdev
->uctx
);
759 * This implementation assumes udb_density == ucq_density! Eventually
760 * we might need to support this but for now fail the open. Also the
761 * cqid and qpid range must match for now.
763 if (rdev
->lldi
.udb_density
!= rdev
->lldi
.ucq_density
) {
764 pr_err(MOD
"%s: unsupported udb/ucq densities %u/%u\n",
765 pci_name(rdev
->lldi
.pdev
), rdev
->lldi
.udb_density
,
766 rdev
->lldi
.ucq_density
);
769 if (rdev
->lldi
.vr
->qp
.start
!= rdev
->lldi
.vr
->cq
.start
||
770 rdev
->lldi
.vr
->qp
.size
!= rdev
->lldi
.vr
->cq
.size
) {
771 pr_err(MOD
"%s: unsupported qp and cq id ranges "
772 "qp start %u size %u cq start %u size %u\n",
773 pci_name(rdev
->lldi
.pdev
), rdev
->lldi
.vr
->qp
.start
,
774 rdev
->lldi
.vr
->qp
.size
, rdev
->lldi
.vr
->cq
.size
,
775 rdev
->lldi
.vr
->cq
.size
);
779 rdev
->qpmask
= rdev
->lldi
.udb_density
- 1;
780 rdev
->cqmask
= rdev
->lldi
.ucq_density
- 1;
781 PDBG("%s dev %s stag start 0x%0x size 0x%0x num stags %d "
782 "pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x "
783 "qp qid start %u size %u cq qid start %u size %u\n",
784 __func__
, pci_name(rdev
->lldi
.pdev
), rdev
->lldi
.vr
->stag
.start
,
785 rdev
->lldi
.vr
->stag
.size
, c4iw_num_stags(rdev
),
786 rdev
->lldi
.vr
->pbl
.start
,
787 rdev
->lldi
.vr
->pbl
.size
, rdev
->lldi
.vr
->rq
.start
,
788 rdev
->lldi
.vr
->rq
.size
,
789 rdev
->lldi
.vr
->qp
.start
,
790 rdev
->lldi
.vr
->qp
.size
,
791 rdev
->lldi
.vr
->cq
.start
,
792 rdev
->lldi
.vr
->cq
.size
);
793 PDBG("udb %pR db_reg %p gts_reg %p "
794 "qpmask 0x%x cqmask 0x%x\n",
795 &rdev
->lldi
.pdev
->resource
[2],
796 rdev
->lldi
.db_reg
, rdev
->lldi
.gts_reg
,
797 rdev
->qpmask
, rdev
->cqmask
);
799 if (c4iw_num_stags(rdev
) == 0)
802 rdev
->stats
.pd
.total
= T4_MAX_NUM_PD
;
803 rdev
->stats
.stag
.total
= rdev
->lldi
.vr
->stag
.size
;
804 rdev
->stats
.pbl
.total
= rdev
->lldi
.vr
->pbl
.size
;
805 rdev
->stats
.rqt
.total
= rdev
->lldi
.vr
->rq
.size
;
806 rdev
->stats
.ocqp
.total
= rdev
->lldi
.vr
->ocq
.size
;
807 rdev
->stats
.qid
.total
= rdev
->lldi
.vr
->qp
.size
;
809 err
= c4iw_init_resource(rdev
, c4iw_num_stags(rdev
), T4_MAX_NUM_PD
);
811 printk(KERN_ERR MOD
"error %d initializing resources\n", err
);
814 err
= c4iw_pblpool_create(rdev
);
816 printk(KERN_ERR MOD
"error %d initializing pbl pool\n", err
);
817 goto destroy_resource
;
819 err
= c4iw_rqtpool_create(rdev
);
821 printk(KERN_ERR MOD
"error %d initializing rqt pool\n", err
);
822 goto destroy_pblpool
;
824 err
= c4iw_ocqp_pool_create(rdev
);
826 printk(KERN_ERR MOD
"error %d initializing ocqp pool\n", err
);
827 goto destroy_rqtpool
;
829 rdev
->status_page
= (struct t4_dev_status_page
*)
830 __get_free_page(GFP_KERNEL
);
831 if (!rdev
->status_page
)
832 goto destroy_ocqp_pool
;
833 rdev
->status_page
->qp_start
= rdev
->lldi
.vr
->qp
.start
;
834 rdev
->status_page
->qp_size
= rdev
->lldi
.vr
->qp
.size
;
835 rdev
->status_page
->cq_start
= rdev
->lldi
.vr
->cq
.start
;
836 rdev
->status_page
->cq_size
= rdev
->lldi
.vr
->cq
.size
;
839 rdev
->wr_log
= kzalloc((1 << c4iw_wr_log_size_order
) *
840 sizeof(*rdev
->wr_log
), GFP_KERNEL
);
842 rdev
->wr_log_size
= 1 << c4iw_wr_log_size_order
;
843 atomic_set(&rdev
->wr_log_idx
, 0);
845 pr_err(MOD
"error allocating wr_log. Logging disabled\n");
849 rdev
->status_page
->db_off
= 0;
853 c4iw_ocqp_pool_destroy(rdev
);
855 c4iw_rqtpool_destroy(rdev
);
857 c4iw_pblpool_destroy(rdev
);
859 c4iw_destroy_resource(&rdev
->resource
);
863 static void c4iw_rdev_close(struct c4iw_rdev
*rdev
)
866 free_page((unsigned long)rdev
->status_page
);
867 c4iw_pblpool_destroy(rdev
);
868 c4iw_rqtpool_destroy(rdev
);
869 c4iw_destroy_resource(&rdev
->resource
);
872 static void c4iw_dealloc(struct uld_ctx
*ctx
)
874 c4iw_rdev_close(&ctx
->dev
->rdev
);
875 WARN_ON_ONCE(!idr_is_empty(&ctx
->dev
->cqidr
));
876 idr_destroy(&ctx
->dev
->cqidr
);
877 WARN_ON_ONCE(!idr_is_empty(&ctx
->dev
->qpidr
));
878 idr_destroy(&ctx
->dev
->qpidr
);
879 WARN_ON_ONCE(!idr_is_empty(&ctx
->dev
->mmidr
));
880 idr_destroy(&ctx
->dev
->mmidr
);
881 wait_event(ctx
->dev
->wait
, idr_is_empty(&ctx
->dev
->hwtid_idr
));
882 idr_destroy(&ctx
->dev
->hwtid_idr
);
883 idr_destroy(&ctx
->dev
->stid_idr
);
884 idr_destroy(&ctx
->dev
->atid_idr
);
885 if (ctx
->dev
->rdev
.bar2_kva
)
886 iounmap(ctx
->dev
->rdev
.bar2_kva
);
887 if (ctx
->dev
->rdev
.oc_mw_kva
)
888 iounmap(ctx
->dev
->rdev
.oc_mw_kva
);
889 ib_dealloc_device(&ctx
->dev
->ibdev
);
893 static void c4iw_remove(struct uld_ctx
*ctx
)
895 PDBG("%s c4iw_dev %p\n", __func__
, ctx
->dev
);
896 c4iw_unregister_device(ctx
->dev
);
900 static int rdma_supported(const struct cxgb4_lld_info
*infop
)
902 return infop
->vr
->stag
.size
> 0 && infop
->vr
->pbl
.size
> 0 &&
903 infop
->vr
->rq
.size
> 0 && infop
->vr
->qp
.size
> 0 &&
904 infop
->vr
->cq
.size
> 0;
907 static struct c4iw_dev
*c4iw_alloc(const struct cxgb4_lld_info
*infop
)
909 struct c4iw_dev
*devp
;
912 if (!rdma_supported(infop
)) {
913 printk(KERN_INFO MOD
"%s: RDMA not supported on this device.\n",
914 pci_name(infop
->pdev
));
915 return ERR_PTR(-ENOSYS
);
917 if (!ocqp_supported(infop
))
918 pr_info("%s: On-Chip Queues not supported on this device.\n",
919 pci_name(infop
->pdev
));
921 devp
= (struct c4iw_dev
*)ib_alloc_device(sizeof(*devp
));
923 printk(KERN_ERR MOD
"Cannot allocate ib device\n");
924 return ERR_PTR(-ENOMEM
);
926 devp
->rdev
.lldi
= *infop
;
928 /* init various hw-queue params based on lld info */
929 PDBG("%s: Ing. padding boundary is %d, egrsstatuspagesize = %d\n",
930 __func__
, devp
->rdev
.lldi
.sge_ingpadboundary
,
931 devp
->rdev
.lldi
.sge_egrstatuspagesize
);
933 devp
->rdev
.hw_queue
.t4_eq_status_entries
=
934 devp
->rdev
.lldi
.sge_ingpadboundary
> 64 ? 2 : 1;
935 devp
->rdev
.hw_queue
.t4_max_eq_size
= 65520;
936 devp
->rdev
.hw_queue
.t4_max_iq_size
= 65520;
937 devp
->rdev
.hw_queue
.t4_max_rq_size
= 8192 -
938 devp
->rdev
.hw_queue
.t4_eq_status_entries
- 1;
939 devp
->rdev
.hw_queue
.t4_max_sq_size
=
940 devp
->rdev
.hw_queue
.t4_max_eq_size
-
941 devp
->rdev
.hw_queue
.t4_eq_status_entries
- 1;
942 devp
->rdev
.hw_queue
.t4_max_qp_depth
=
943 devp
->rdev
.hw_queue
.t4_max_rq_size
;
944 devp
->rdev
.hw_queue
.t4_max_cq_depth
=
945 devp
->rdev
.hw_queue
.t4_max_iq_size
- 2;
946 devp
->rdev
.hw_queue
.t4_stat_len
=
947 devp
->rdev
.lldi
.sge_egrstatuspagesize
;
950 * For T5/T6 devices, we map all of BAR2 with WC.
951 * For T4 devices with onchip qp mem, we map only that part
954 devp
->rdev
.bar2_pa
= pci_resource_start(devp
->rdev
.lldi
.pdev
, 2);
955 if (!is_t4(devp
->rdev
.lldi
.adapter_type
)) {
956 devp
->rdev
.bar2_kva
= ioremap_wc(devp
->rdev
.bar2_pa
,
957 pci_resource_len(devp
->rdev
.lldi
.pdev
, 2));
958 if (!devp
->rdev
.bar2_kva
) {
959 pr_err(MOD
"Unable to ioremap BAR2\n");
960 ib_dealloc_device(&devp
->ibdev
);
961 return ERR_PTR(-EINVAL
);
963 } else if (ocqp_supported(infop
)) {
964 devp
->rdev
.oc_mw_pa
=
965 pci_resource_start(devp
->rdev
.lldi
.pdev
, 2) +
966 pci_resource_len(devp
->rdev
.lldi
.pdev
, 2) -
967 roundup_pow_of_two(devp
->rdev
.lldi
.vr
->ocq
.size
);
968 devp
->rdev
.oc_mw_kva
= ioremap_wc(devp
->rdev
.oc_mw_pa
,
969 devp
->rdev
.lldi
.vr
->ocq
.size
);
970 if (!devp
->rdev
.oc_mw_kva
) {
971 pr_err(MOD
"Unable to ioremap onchip mem\n");
972 ib_dealloc_device(&devp
->ibdev
);
973 return ERR_PTR(-EINVAL
);
977 PDBG(KERN_INFO MOD
"ocq memory: "
978 "hw_start 0x%x size %u mw_pa 0x%lx mw_kva %p\n",
979 devp
->rdev
.lldi
.vr
->ocq
.start
, devp
->rdev
.lldi
.vr
->ocq
.size
,
980 devp
->rdev
.oc_mw_pa
, devp
->rdev
.oc_mw_kva
);
982 ret
= c4iw_rdev_open(&devp
->rdev
);
984 printk(KERN_ERR MOD
"Unable to open CXIO rdev err %d\n", ret
);
985 ib_dealloc_device(&devp
->ibdev
);
989 idr_init(&devp
->cqidr
);
990 idr_init(&devp
->qpidr
);
991 idr_init(&devp
->mmidr
);
992 idr_init(&devp
->hwtid_idr
);
993 idr_init(&devp
->stid_idr
);
994 idr_init(&devp
->atid_idr
);
995 spin_lock_init(&devp
->lock
);
996 mutex_init(&devp
->rdev
.stats
.lock
);
997 mutex_init(&devp
->db_mutex
);
998 INIT_LIST_HEAD(&devp
->db_fc_list
);
999 init_waitqueue_head(&devp
->wait
);
1000 devp
->avail_ird
= devp
->rdev
.lldi
.max_ird_adapter
;
1002 if (c4iw_debugfs_root
) {
1003 devp
->debugfs_root
= debugfs_create_dir(
1004 pci_name(devp
->rdev
.lldi
.pdev
),
1006 setup_debugfs(devp
);
1013 static void *c4iw_uld_add(const struct cxgb4_lld_info
*infop
)
1015 struct uld_ctx
*ctx
;
1016 static int vers_printed
;
1019 if (!vers_printed
++)
1020 pr_info("Chelsio T4/T5 RDMA Driver - version %s\n",
1023 ctx
= kzalloc(sizeof *ctx
, GFP_KERNEL
);
1025 ctx
= ERR_PTR(-ENOMEM
);
1030 PDBG("%s found device %s nchan %u nrxq %u ntxq %u nports %u\n",
1031 __func__
, pci_name(ctx
->lldi
.pdev
),
1032 ctx
->lldi
.nchan
, ctx
->lldi
.nrxq
,
1033 ctx
->lldi
.ntxq
, ctx
->lldi
.nports
);
1035 mutex_lock(&dev_mutex
);
1036 list_add_tail(&ctx
->entry
, &uld_ctx_list
);
1037 mutex_unlock(&dev_mutex
);
1039 for (i
= 0; i
< ctx
->lldi
.nrxq
; i
++)
1040 PDBG("rxqid[%u] %u\n", i
, ctx
->lldi
.rxq_ids
[i
]);
1045 static inline struct sk_buff
*copy_gl_to_skb_pkt(const struct pkt_gl
*gl
,
1049 struct sk_buff
*skb
;
1052 * Allocate space for cpl_pass_accept_req which will be synthesized by
1053 * driver. Once the driver synthesizes the request the skb will go
1054 * through the regular cpl_pass_accept_req processing.
1055 * The math here assumes sizeof cpl_pass_accept_req >= sizeof
1058 skb
= alloc_skb(gl
->tot_len
+ sizeof(struct cpl_pass_accept_req
) +
1059 sizeof(struct rss_header
) - pktshift
, GFP_ATOMIC
);
1063 __skb_put(skb
, gl
->tot_len
+ sizeof(struct cpl_pass_accept_req
) +
1064 sizeof(struct rss_header
) - pktshift
);
1067 * This skb will contain:
1068 * rss_header from the rspq descriptor (1 flit)
1069 * cpl_rx_pkt struct from the rspq descriptor (2 flits)
1070 * space for the difference between the size of an
1071 * rx_pkt and pass_accept_req cpl (1 flit)
1072 * the packet data from the gl
1074 skb_copy_to_linear_data(skb
, rsp
, sizeof(struct cpl_pass_accept_req
) +
1075 sizeof(struct rss_header
));
1076 skb_copy_to_linear_data_offset(skb
, sizeof(struct rss_header
) +
1077 sizeof(struct cpl_pass_accept_req
),
1079 gl
->tot_len
- pktshift
);
1083 static inline int recv_rx_pkt(struct c4iw_dev
*dev
, const struct pkt_gl
*gl
,
1086 unsigned int opcode
= *(u8
*)rsp
;
1087 struct sk_buff
*skb
;
1089 if (opcode
!= CPL_RX_PKT
)
1092 skb
= copy_gl_to_skb_pkt(gl
, rsp
, dev
->rdev
.lldi
.sge_pktshift
);
1096 if (c4iw_handlers
[opcode
] == NULL
) {
1097 pr_info("%s no handler opcode 0x%x...\n", __func__
,
1102 c4iw_handlers
[opcode
](dev
, skb
);
1108 static int c4iw_uld_rx_handler(void *handle
, const __be64
*rsp
,
1109 const struct pkt_gl
*gl
)
1111 struct uld_ctx
*ctx
= handle
;
1112 struct c4iw_dev
*dev
= ctx
->dev
;
1113 struct sk_buff
*skb
;
1117 /* omit RSS and rsp_ctrl at end of descriptor */
1118 unsigned int len
= 64 - sizeof(struct rsp_ctrl
) - 8;
1120 skb
= alloc_skb(256, GFP_ATOMIC
);
1123 __skb_put(skb
, len
);
1124 skb_copy_to_linear_data(skb
, &rsp
[1], len
);
1125 } else if (gl
== CXGB4_MSG_AN
) {
1126 const struct rsp_ctrl
*rc
= (void *)rsp
;
1128 u32 qid
= be32_to_cpu(rc
->pldbuflen_qid
);
1129 c4iw_ev_handler(dev
, qid
);
1131 } else if (unlikely(*(u8
*)rsp
!= *(u8
*)gl
->va
)) {
1132 if (recv_rx_pkt(dev
, gl
, rsp
))
1135 pr_info("%s: unexpected FL contents at %p, " \
1136 "RSS %#llx, FL %#llx, len %u\n",
1137 pci_name(ctx
->lldi
.pdev
), gl
->va
,
1138 (unsigned long long)be64_to_cpu(*rsp
),
1139 (unsigned long long)be64_to_cpu(
1140 *(__force __be64
*)gl
->va
),
1145 skb
= cxgb4_pktgl_to_skb(gl
, 128, 128);
1150 opcode
= *(u8
*)rsp
;
1151 if (c4iw_handlers
[opcode
]) {
1152 c4iw_handlers
[opcode
](dev
, skb
);
1154 pr_info("%s no handler opcode 0x%x...\n", __func__
,
1164 static int c4iw_uld_state_change(void *handle
, enum cxgb4_state new_state
)
1166 struct uld_ctx
*ctx
= handle
;
1168 PDBG("%s new_state %u\n", __func__
, new_state
);
1169 switch (new_state
) {
1170 case CXGB4_STATE_UP
:
1171 printk(KERN_INFO MOD
"%s: Up\n", pci_name(ctx
->lldi
.pdev
));
1175 ctx
->dev
= c4iw_alloc(&ctx
->lldi
);
1176 if (IS_ERR(ctx
->dev
)) {
1178 "%s: initialization failed: %ld\n",
1179 pci_name(ctx
->lldi
.pdev
),
1184 ret
= c4iw_register_device(ctx
->dev
);
1187 "%s: RDMA registration failed: %d\n",
1188 pci_name(ctx
->lldi
.pdev
), ret
);
1193 case CXGB4_STATE_DOWN
:
1194 printk(KERN_INFO MOD
"%s: Down\n",
1195 pci_name(ctx
->lldi
.pdev
));
1199 case CXGB4_STATE_START_RECOVERY
:
1200 printk(KERN_INFO MOD
"%s: Fatal Error\n",
1201 pci_name(ctx
->lldi
.pdev
));
1203 struct ib_event event
;
1205 ctx
->dev
->rdev
.flags
|= T4_FATAL_ERROR
;
1206 memset(&event
, 0, sizeof event
);
1207 event
.event
= IB_EVENT_DEVICE_FATAL
;
1208 event
.device
= &ctx
->dev
->ibdev
;
1209 ib_dispatch_event(&event
);
1213 case CXGB4_STATE_DETACH
:
1214 printk(KERN_INFO MOD
"%s: Detach\n",
1215 pci_name(ctx
->lldi
.pdev
));
1223 static int disable_qp_db(int id
, void *p
, void *data
)
1225 struct c4iw_qp
*qp
= p
;
1227 t4_disable_wq_db(&qp
->wq
);
1231 static void stop_queues(struct uld_ctx
*ctx
)
1233 unsigned long flags
;
1235 spin_lock_irqsave(&ctx
->dev
->lock
, flags
);
1236 ctx
->dev
->rdev
.stats
.db_state_transitions
++;
1237 ctx
->dev
->db_state
= STOPPED
;
1238 if (ctx
->dev
->rdev
.flags
& T4_STATUS_PAGE_DISABLED
)
1239 idr_for_each(&ctx
->dev
->qpidr
, disable_qp_db
, NULL
);
1241 ctx
->dev
->rdev
.status_page
->db_off
= 1;
1242 spin_unlock_irqrestore(&ctx
->dev
->lock
, flags
);
1245 static int enable_qp_db(int id
, void *p
, void *data
)
1247 struct c4iw_qp
*qp
= p
;
1249 t4_enable_wq_db(&qp
->wq
);
1253 static void resume_rc_qp(struct c4iw_qp
*qp
)
1255 spin_lock(&qp
->lock
);
1256 t4_ring_sq_db(&qp
->wq
, qp
->wq
.sq
.wq_pidx_inc
, NULL
);
1257 qp
->wq
.sq
.wq_pidx_inc
= 0;
1258 t4_ring_rq_db(&qp
->wq
, qp
->wq
.rq
.wq_pidx_inc
, NULL
);
1259 qp
->wq
.rq
.wq_pidx_inc
= 0;
1260 spin_unlock(&qp
->lock
);
1263 static void resume_a_chunk(struct uld_ctx
*ctx
)
1268 for (i
= 0; i
< DB_FC_RESUME_SIZE
; i
++) {
1269 qp
= list_first_entry(&ctx
->dev
->db_fc_list
, struct c4iw_qp
,
1271 list_del_init(&qp
->db_fc_entry
);
1273 if (list_empty(&ctx
->dev
->db_fc_list
))
1278 static void resume_queues(struct uld_ctx
*ctx
)
1280 spin_lock_irq(&ctx
->dev
->lock
);
1281 if (ctx
->dev
->db_state
!= STOPPED
)
1283 ctx
->dev
->db_state
= FLOW_CONTROL
;
1285 if (list_empty(&ctx
->dev
->db_fc_list
)) {
1286 WARN_ON(ctx
->dev
->db_state
!= FLOW_CONTROL
);
1287 ctx
->dev
->db_state
= NORMAL
;
1288 ctx
->dev
->rdev
.stats
.db_state_transitions
++;
1289 if (ctx
->dev
->rdev
.flags
& T4_STATUS_PAGE_DISABLED
) {
1290 idr_for_each(&ctx
->dev
->qpidr
, enable_qp_db
,
1293 ctx
->dev
->rdev
.status_page
->db_off
= 0;
1297 if (cxgb4_dbfifo_count(ctx
->dev
->rdev
.lldi
.ports
[0], 1)
1298 < (ctx
->dev
->rdev
.lldi
.dbfifo_int_thresh
<<
1299 DB_FC_DRAIN_THRESH
)) {
1300 resume_a_chunk(ctx
);
1302 if (!list_empty(&ctx
->dev
->db_fc_list
)) {
1303 spin_unlock_irq(&ctx
->dev
->lock
);
1304 if (DB_FC_RESUME_DELAY
) {
1305 set_current_state(TASK_UNINTERRUPTIBLE
);
1306 schedule_timeout(DB_FC_RESUME_DELAY
);
1308 spin_lock_irq(&ctx
->dev
->lock
);
1309 if (ctx
->dev
->db_state
!= FLOW_CONTROL
)
1315 if (ctx
->dev
->db_state
!= NORMAL
)
1316 ctx
->dev
->rdev
.stats
.db_fc_interruptions
++;
1317 spin_unlock_irq(&ctx
->dev
->lock
);
1322 struct c4iw_qp
**qps
;
1325 static int add_and_ref_qp(int id
, void *p
, void *data
)
1327 struct qp_list
*qp_listp
= data
;
1328 struct c4iw_qp
*qp
= p
;
1330 c4iw_qp_add_ref(&qp
->ibqp
);
1331 qp_listp
->qps
[qp_listp
->idx
++] = qp
;
1335 static int count_qps(int id
, void *p
, void *data
)
1337 unsigned *countp
= data
;
1342 static void deref_qps(struct qp_list
*qp_list
)
1346 for (idx
= 0; idx
< qp_list
->idx
; idx
++)
1347 c4iw_qp_rem_ref(&qp_list
->qps
[idx
]->ibqp
);
1350 static void recover_lost_dbs(struct uld_ctx
*ctx
, struct qp_list
*qp_list
)
1355 for (idx
= 0; idx
< qp_list
->idx
; idx
++) {
1356 struct c4iw_qp
*qp
= qp_list
->qps
[idx
];
1358 spin_lock_irq(&qp
->rhp
->lock
);
1359 spin_lock(&qp
->lock
);
1360 ret
= cxgb4_sync_txq_pidx(qp
->rhp
->rdev
.lldi
.ports
[0],
1362 t4_sq_host_wq_pidx(&qp
->wq
),
1363 t4_sq_wq_size(&qp
->wq
));
1365 pr_err(MOD
"%s: Fatal error - "
1366 "DB overflow recovery failed - "
1367 "error syncing SQ qid %u\n",
1368 pci_name(ctx
->lldi
.pdev
), qp
->wq
.sq
.qid
);
1369 spin_unlock(&qp
->lock
);
1370 spin_unlock_irq(&qp
->rhp
->lock
);
1373 qp
->wq
.sq
.wq_pidx_inc
= 0;
1375 ret
= cxgb4_sync_txq_pidx(qp
->rhp
->rdev
.lldi
.ports
[0],
1377 t4_rq_host_wq_pidx(&qp
->wq
),
1378 t4_rq_wq_size(&qp
->wq
));
1381 pr_err(MOD
"%s: Fatal error - "
1382 "DB overflow recovery failed - "
1383 "error syncing RQ qid %u\n",
1384 pci_name(ctx
->lldi
.pdev
), qp
->wq
.rq
.qid
);
1385 spin_unlock(&qp
->lock
);
1386 spin_unlock_irq(&qp
->rhp
->lock
);
1389 qp
->wq
.rq
.wq_pidx_inc
= 0;
1390 spin_unlock(&qp
->lock
);
1391 spin_unlock_irq(&qp
->rhp
->lock
);
1393 /* Wait for the dbfifo to drain */
1394 while (cxgb4_dbfifo_count(qp
->rhp
->rdev
.lldi
.ports
[0], 1) > 0) {
1395 set_current_state(TASK_UNINTERRUPTIBLE
);
1396 schedule_timeout(usecs_to_jiffies(10));
1401 static void recover_queues(struct uld_ctx
*ctx
)
1404 struct qp_list qp_list
;
1407 /* slow everybody down */
1408 set_current_state(TASK_UNINTERRUPTIBLE
);
1409 schedule_timeout(usecs_to_jiffies(1000));
1411 /* flush the SGE contexts */
1412 ret
= cxgb4_flush_eq_cache(ctx
->dev
->rdev
.lldi
.ports
[0]);
1414 printk(KERN_ERR MOD
"%s: Fatal error - DB overflow recovery failed\n",
1415 pci_name(ctx
->lldi
.pdev
));
1419 /* Count active queues so we can build a list of queues to recover */
1420 spin_lock_irq(&ctx
->dev
->lock
);
1421 WARN_ON(ctx
->dev
->db_state
!= STOPPED
);
1422 ctx
->dev
->db_state
= RECOVERY
;
1423 idr_for_each(&ctx
->dev
->qpidr
, count_qps
, &count
);
1425 qp_list
.qps
= kzalloc(count
* sizeof *qp_list
.qps
, GFP_ATOMIC
);
1427 printk(KERN_ERR MOD
"%s: Fatal error - DB overflow recovery failed\n",
1428 pci_name(ctx
->lldi
.pdev
));
1429 spin_unlock_irq(&ctx
->dev
->lock
);
1434 /* add and ref each qp so it doesn't get freed */
1435 idr_for_each(&ctx
->dev
->qpidr
, add_and_ref_qp
, &qp_list
);
1437 spin_unlock_irq(&ctx
->dev
->lock
);
1439 /* now traverse the list in a safe context to recover the db state*/
1440 recover_lost_dbs(ctx
, &qp_list
);
1442 /* we're almost done! deref the qps and clean up */
1443 deref_qps(&qp_list
);
1446 spin_lock_irq(&ctx
->dev
->lock
);
1447 WARN_ON(ctx
->dev
->db_state
!= RECOVERY
);
1448 ctx
->dev
->db_state
= STOPPED
;
1449 spin_unlock_irq(&ctx
->dev
->lock
);
1452 static int c4iw_uld_control(void *handle
, enum cxgb4_control control
, ...)
1454 struct uld_ctx
*ctx
= handle
;
1457 case CXGB4_CONTROL_DB_FULL
:
1459 ctx
->dev
->rdev
.stats
.db_full
++;
1461 case CXGB4_CONTROL_DB_EMPTY
:
1463 mutex_lock(&ctx
->dev
->rdev
.stats
.lock
);
1464 ctx
->dev
->rdev
.stats
.db_empty
++;
1465 mutex_unlock(&ctx
->dev
->rdev
.stats
.lock
);
1467 case CXGB4_CONTROL_DB_DROP
:
1468 recover_queues(ctx
);
1469 mutex_lock(&ctx
->dev
->rdev
.stats
.lock
);
1470 ctx
->dev
->rdev
.stats
.db_drop
++;
1471 mutex_unlock(&ctx
->dev
->rdev
.stats
.lock
);
1474 printk(KERN_WARNING MOD
"%s: unknown control cmd %u\n",
1475 pci_name(ctx
->lldi
.pdev
), control
);
1481 static struct cxgb4_uld_info c4iw_uld_info
= {
1483 .nrxq
= MAX_ULD_QSETS
,
1484 .ntxq
= MAX_ULD_QSETS
,
1488 .add
= c4iw_uld_add
,
1489 .rx_handler
= c4iw_uld_rx_handler
,
1490 .state_change
= c4iw_uld_state_change
,
1491 .control
= c4iw_uld_control
,
1494 static int __init
c4iw_init_module(void)
1498 err
= c4iw_cm_init();
1502 c4iw_debugfs_root
= debugfs_create_dir(DRV_NAME
, NULL
);
1503 if (!c4iw_debugfs_root
)
1504 printk(KERN_WARNING MOD
1505 "could not create debugfs entry, continuing\n");
1507 cxgb4_register_uld(CXGB4_ULD_RDMA
, &c4iw_uld_info
);
1512 static void __exit
c4iw_exit_module(void)
1514 struct uld_ctx
*ctx
, *tmp
;
1516 mutex_lock(&dev_mutex
);
1517 list_for_each_entry_safe(ctx
, tmp
, &uld_ctx_list
, entry
) {
1522 mutex_unlock(&dev_mutex
);
1523 cxgb4_unregister_uld(CXGB4_ULD_RDMA
);
1525 debugfs_remove_recursive(c4iw_debugfs_root
);
1528 module_init(c4iw_init_module
);
1529 module_exit(c4iw_exit_module
);