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 struct sockaddr_in zero_sin
= {
218 .sin_family
= AF_INET
,
221 static struct sockaddr_in6 zero_sin6
= {
222 .sin6_family
= AF_INET6
,
225 static void set_ep_sin_addrs(struct c4iw_ep
*ep
,
226 struct sockaddr_in
**lsin
,
227 struct sockaddr_in
**rsin
,
228 struct sockaddr_in
**m_lsin
,
229 struct sockaddr_in
**m_rsin
)
231 struct iw_cm_id
*id
= ep
->com
.cm_id
;
233 *lsin
= (struct sockaddr_in
*)&ep
->com
.local_addr
;
234 *rsin
= (struct sockaddr_in
*)&ep
->com
.remote_addr
;
236 *m_lsin
= (struct sockaddr_in
*)&id
->m_local_addr
;
237 *m_rsin
= (struct sockaddr_in
*)&id
->m_remote_addr
;
244 static void set_ep_sin6_addrs(struct c4iw_ep
*ep
,
245 struct sockaddr_in6
**lsin6
,
246 struct sockaddr_in6
**rsin6
,
247 struct sockaddr_in6
**m_lsin6
,
248 struct sockaddr_in6
**m_rsin6
)
250 struct iw_cm_id
*id
= ep
->com
.cm_id
;
252 *lsin6
= (struct sockaddr_in6
*)&ep
->com
.local_addr
;
253 *rsin6
= (struct sockaddr_in6
*)&ep
->com
.remote_addr
;
255 *m_lsin6
= (struct sockaddr_in6
*)&id
->m_local_addr
;
256 *m_rsin6
= (struct sockaddr_in6
*)&id
->m_remote_addr
;
258 *m_lsin6
= &zero_sin6
;
259 *m_rsin6
= &zero_sin6
;
263 static int dump_qp(int id
, void *p
, void *data
)
265 struct c4iw_qp
*qp
= p
;
266 struct c4iw_debugfs_data
*qpd
= data
;
270 if (id
!= qp
->wq
.sq
.qid
)
273 space
= qpd
->bufsize
- qpd
->pos
- 1;
278 struct c4iw_ep
*ep
= qp
->ep
;
280 if (ep
->com
.local_addr
.ss_family
== AF_INET
) {
281 struct sockaddr_in
*lsin
;
282 struct sockaddr_in
*rsin
;
283 struct sockaddr_in
*m_lsin
;
284 struct sockaddr_in
*m_rsin
;
286 set_ep_sin_addrs(ep
, &lsin
, &rsin
, &m_lsin
, &m_rsin
);
287 cc
= snprintf(qpd
->buf
+ qpd
->pos
, space
,
288 "rc qp sq id %u rq id %u state %u "
289 "onchip %u ep tid %u state %u "
290 "%pI4:%u/%u->%pI4:%u/%u\n",
291 qp
->wq
.sq
.qid
, qp
->wq
.rq
.qid
,
293 qp
->wq
.sq
.flags
& T4_SQ_ONCHIP
,
294 ep
->hwtid
, (int)ep
->com
.state
,
295 &lsin
->sin_addr
, ntohs(lsin
->sin_port
),
296 ntohs(m_lsin
->sin_port
),
297 &rsin
->sin_addr
, ntohs(rsin
->sin_port
),
298 ntohs(m_rsin
->sin_port
));
300 struct sockaddr_in6
*lsin6
;
301 struct sockaddr_in6
*rsin6
;
302 struct sockaddr_in6
*m_lsin6
;
303 struct sockaddr_in6
*m_rsin6
;
305 set_ep_sin6_addrs(ep
, &lsin6
, &rsin6
, &m_lsin6
,
307 cc
= snprintf(qpd
->buf
+ qpd
->pos
, space
,
308 "rc qp sq id %u rq id %u state %u "
309 "onchip %u ep tid %u state %u "
310 "%pI6:%u/%u->%pI6:%u/%u\n",
311 qp
->wq
.sq
.qid
, qp
->wq
.rq
.qid
,
313 qp
->wq
.sq
.flags
& T4_SQ_ONCHIP
,
314 ep
->hwtid
, (int)ep
->com
.state
,
316 ntohs(lsin6
->sin6_port
),
317 ntohs(m_lsin6
->sin6_port
),
319 ntohs(rsin6
->sin6_port
),
320 ntohs(m_rsin6
->sin6_port
));
323 cc
= snprintf(qpd
->buf
+ qpd
->pos
, space
,
324 "qp sq id %u rq id %u state %u onchip %u\n",
325 qp
->wq
.sq
.qid
, qp
->wq
.rq
.qid
,
327 qp
->wq
.sq
.flags
& T4_SQ_ONCHIP
);
333 static int qp_release(struct inode
*inode
, struct file
*file
)
335 struct c4iw_debugfs_data
*qpd
= file
->private_data
;
337 printk(KERN_INFO
"%s null qpd?\n", __func__
);
345 static int qp_open(struct inode
*inode
, struct file
*file
)
347 struct c4iw_debugfs_data
*qpd
;
350 qpd
= kmalloc(sizeof *qpd
, GFP_KERNEL
);
354 qpd
->devp
= inode
->i_private
;
357 spin_lock_irq(&qpd
->devp
->lock
);
358 idr_for_each(&qpd
->devp
->qpidr
, count_idrs
, &count
);
359 spin_unlock_irq(&qpd
->devp
->lock
);
361 qpd
->bufsize
= count
* 180;
362 qpd
->buf
= vmalloc(qpd
->bufsize
);
368 spin_lock_irq(&qpd
->devp
->lock
);
369 idr_for_each(&qpd
->devp
->qpidr
, dump_qp
, qpd
);
370 spin_unlock_irq(&qpd
->devp
->lock
);
372 qpd
->buf
[qpd
->pos
++] = 0;
373 file
->private_data
= qpd
;
377 static const struct file_operations qp_debugfs_fops
= {
378 .owner
= THIS_MODULE
,
380 .release
= qp_release
,
381 .read
= debugfs_read
,
382 .llseek
= default_llseek
,
385 static int dump_stag(int id
, void *p
, void *data
)
387 struct c4iw_debugfs_data
*stagd
= data
;
390 struct fw_ri_tpte tpte
;
393 space
= stagd
->bufsize
- stagd
->pos
- 1;
397 ret
= cxgb4_read_tpte(stagd
->devp
->rdev
.lldi
.ports
[0], (u32
)id
<<8,
400 dev_err(&stagd
->devp
->rdev
.lldi
.pdev
->dev
,
401 "%s cxgb4_read_tpte err %d\n", __func__
, ret
);
404 cc
= snprintf(stagd
->buf
+ stagd
->pos
, space
,
405 "stag: idx 0x%x valid %d key 0x%x state %d pdid %d "
406 "perm 0x%x ps %d len 0x%llx va 0x%llx\n",
408 FW_RI_TPTE_VALID_G(ntohl(tpte
.valid_to_pdid
)),
409 FW_RI_TPTE_STAGKEY_G(ntohl(tpte
.valid_to_pdid
)),
410 FW_RI_TPTE_STAGSTATE_G(ntohl(tpte
.valid_to_pdid
)),
411 FW_RI_TPTE_PDID_G(ntohl(tpte
.valid_to_pdid
)),
412 FW_RI_TPTE_PERM_G(ntohl(tpte
.locread_to_qpid
)),
413 FW_RI_TPTE_PS_G(ntohl(tpte
.locread_to_qpid
)),
414 ((u64
)ntohl(tpte
.len_hi
) << 32) | ntohl(tpte
.len_lo
),
415 ((u64
)ntohl(tpte
.va_hi
) << 32) | ntohl(tpte
.va_lo_fbo
));
421 static int stag_release(struct inode
*inode
, struct file
*file
)
423 struct c4iw_debugfs_data
*stagd
= file
->private_data
;
425 printk(KERN_INFO
"%s null stagd?\n", __func__
);
433 static int stag_open(struct inode
*inode
, struct file
*file
)
435 struct c4iw_debugfs_data
*stagd
;
439 stagd
= kmalloc(sizeof *stagd
, GFP_KERNEL
);
444 stagd
->devp
= inode
->i_private
;
447 spin_lock_irq(&stagd
->devp
->lock
);
448 idr_for_each(&stagd
->devp
->mmidr
, count_idrs
, &count
);
449 spin_unlock_irq(&stagd
->devp
->lock
);
451 stagd
->bufsize
= count
* 256;
452 stagd
->buf
= vmalloc(stagd
->bufsize
);
458 spin_lock_irq(&stagd
->devp
->lock
);
459 idr_for_each(&stagd
->devp
->mmidr
, dump_stag
, stagd
);
460 spin_unlock_irq(&stagd
->devp
->lock
);
462 stagd
->buf
[stagd
->pos
++] = 0;
463 file
->private_data
= stagd
;
471 static const struct file_operations stag_debugfs_fops
= {
472 .owner
= THIS_MODULE
,
474 .release
= stag_release
,
475 .read
= debugfs_read
,
476 .llseek
= default_llseek
,
479 static char *db_state_str
[] = {"NORMAL", "FLOW_CONTROL", "RECOVERY", "STOPPED"};
481 static int stats_show(struct seq_file
*seq
, void *v
)
483 struct c4iw_dev
*dev
= seq
->private;
485 seq_printf(seq
, " Object: %10s %10s %10s %10s\n", "Total", "Current",
487 seq_printf(seq
, " PDID: %10llu %10llu %10llu %10llu\n",
488 dev
->rdev
.stats
.pd
.total
, dev
->rdev
.stats
.pd
.cur
,
489 dev
->rdev
.stats
.pd
.max
, dev
->rdev
.stats
.pd
.fail
);
490 seq_printf(seq
, " QID: %10llu %10llu %10llu %10llu\n",
491 dev
->rdev
.stats
.qid
.total
, dev
->rdev
.stats
.qid
.cur
,
492 dev
->rdev
.stats
.qid
.max
, dev
->rdev
.stats
.qid
.fail
);
493 seq_printf(seq
, " TPTMEM: %10llu %10llu %10llu %10llu\n",
494 dev
->rdev
.stats
.stag
.total
, dev
->rdev
.stats
.stag
.cur
,
495 dev
->rdev
.stats
.stag
.max
, dev
->rdev
.stats
.stag
.fail
);
496 seq_printf(seq
, " PBLMEM: %10llu %10llu %10llu %10llu\n",
497 dev
->rdev
.stats
.pbl
.total
, dev
->rdev
.stats
.pbl
.cur
,
498 dev
->rdev
.stats
.pbl
.max
, dev
->rdev
.stats
.pbl
.fail
);
499 seq_printf(seq
, " RQTMEM: %10llu %10llu %10llu %10llu\n",
500 dev
->rdev
.stats
.rqt
.total
, dev
->rdev
.stats
.rqt
.cur
,
501 dev
->rdev
.stats
.rqt
.max
, dev
->rdev
.stats
.rqt
.fail
);
502 seq_printf(seq
, " OCQPMEM: %10llu %10llu %10llu %10llu\n",
503 dev
->rdev
.stats
.ocqp
.total
, dev
->rdev
.stats
.ocqp
.cur
,
504 dev
->rdev
.stats
.ocqp
.max
, dev
->rdev
.stats
.ocqp
.fail
);
505 seq_printf(seq
, " DB FULL: %10llu\n", dev
->rdev
.stats
.db_full
);
506 seq_printf(seq
, " DB EMPTY: %10llu\n", dev
->rdev
.stats
.db_empty
);
507 seq_printf(seq
, " DB DROP: %10llu\n", dev
->rdev
.stats
.db_drop
);
508 seq_printf(seq
, " DB State: %s Transitions %llu FC Interruptions %llu\n",
509 db_state_str
[dev
->db_state
],
510 dev
->rdev
.stats
.db_state_transitions
,
511 dev
->rdev
.stats
.db_fc_interruptions
);
512 seq_printf(seq
, "TCAM_FULL: %10llu\n", dev
->rdev
.stats
.tcam_full
);
513 seq_printf(seq
, "ACT_OFLD_CONN_FAILS: %10llu\n",
514 dev
->rdev
.stats
.act_ofld_conn_fails
);
515 seq_printf(seq
, "PAS_OFLD_CONN_FAILS: %10llu\n",
516 dev
->rdev
.stats
.pas_ofld_conn_fails
);
517 seq_printf(seq
, "NEG_ADV_RCVD: %10llu\n", dev
->rdev
.stats
.neg_adv
);
518 seq_printf(seq
, "AVAILABLE IRD: %10u\n", dev
->avail_ird
);
522 static int stats_open(struct inode
*inode
, struct file
*file
)
524 return single_open(file
, stats_show
, inode
->i_private
);
527 static ssize_t
stats_clear(struct file
*file
, const char __user
*buf
,
528 size_t count
, loff_t
*pos
)
530 struct c4iw_dev
*dev
= ((struct seq_file
*)file
->private_data
)->private;
532 mutex_lock(&dev
->rdev
.stats
.lock
);
533 dev
->rdev
.stats
.pd
.max
= 0;
534 dev
->rdev
.stats
.pd
.fail
= 0;
535 dev
->rdev
.stats
.qid
.max
= 0;
536 dev
->rdev
.stats
.qid
.fail
= 0;
537 dev
->rdev
.stats
.stag
.max
= 0;
538 dev
->rdev
.stats
.stag
.fail
= 0;
539 dev
->rdev
.stats
.pbl
.max
= 0;
540 dev
->rdev
.stats
.pbl
.fail
= 0;
541 dev
->rdev
.stats
.rqt
.max
= 0;
542 dev
->rdev
.stats
.rqt
.fail
= 0;
543 dev
->rdev
.stats
.ocqp
.max
= 0;
544 dev
->rdev
.stats
.ocqp
.fail
= 0;
545 dev
->rdev
.stats
.db_full
= 0;
546 dev
->rdev
.stats
.db_empty
= 0;
547 dev
->rdev
.stats
.db_drop
= 0;
548 dev
->rdev
.stats
.db_state_transitions
= 0;
549 dev
->rdev
.stats
.tcam_full
= 0;
550 dev
->rdev
.stats
.act_ofld_conn_fails
= 0;
551 dev
->rdev
.stats
.pas_ofld_conn_fails
= 0;
552 mutex_unlock(&dev
->rdev
.stats
.lock
);
556 static const struct file_operations stats_debugfs_fops
= {
557 .owner
= THIS_MODULE
,
559 .release
= single_release
,
562 .write
= stats_clear
,
565 static int dump_ep(int id
, void *p
, void *data
)
567 struct c4iw_ep
*ep
= p
;
568 struct c4iw_debugfs_data
*epd
= data
;
572 space
= epd
->bufsize
- epd
->pos
- 1;
576 if (ep
->com
.local_addr
.ss_family
== AF_INET
) {
577 struct sockaddr_in
*lsin
;
578 struct sockaddr_in
*rsin
;
579 struct sockaddr_in
*m_lsin
;
580 struct sockaddr_in
*m_rsin
;
582 set_ep_sin_addrs(ep
, &lsin
, &rsin
, &m_lsin
, &m_rsin
);
583 cc
= snprintf(epd
->buf
+ epd
->pos
, space
,
584 "ep %p cm_id %p qp %p state %d flags 0x%lx "
585 "history 0x%lx hwtid %d atid %d "
586 "conn_na %u abort_na %u "
587 "%pI4:%d/%d <-> %pI4:%d/%d\n",
588 ep
, ep
->com
.cm_id
, ep
->com
.qp
,
589 (int)ep
->com
.state
, ep
->com
.flags
,
590 ep
->com
.history
, ep
->hwtid
, ep
->atid
,
591 ep
->stats
.connect_neg_adv
,
592 ep
->stats
.abort_neg_adv
,
593 &lsin
->sin_addr
, ntohs(lsin
->sin_port
),
594 ntohs(m_lsin
->sin_port
),
595 &rsin
->sin_addr
, ntohs(rsin
->sin_port
),
596 ntohs(m_rsin
->sin_port
));
598 struct sockaddr_in6
*lsin6
;
599 struct sockaddr_in6
*rsin6
;
600 struct sockaddr_in6
*m_lsin6
;
601 struct sockaddr_in6
*m_rsin6
;
603 set_ep_sin6_addrs(ep
, &lsin6
, &rsin6
, &m_lsin6
, &m_rsin6
);
604 cc
= snprintf(epd
->buf
+ epd
->pos
, space
,
605 "ep %p cm_id %p qp %p state %d flags 0x%lx "
606 "history 0x%lx hwtid %d atid %d "
607 "conn_na %u abort_na %u "
608 "%pI6:%d/%d <-> %pI6:%d/%d\n",
609 ep
, ep
->com
.cm_id
, ep
->com
.qp
,
610 (int)ep
->com
.state
, ep
->com
.flags
,
611 ep
->com
.history
, ep
->hwtid
, ep
->atid
,
612 ep
->stats
.connect_neg_adv
,
613 ep
->stats
.abort_neg_adv
,
614 &lsin6
->sin6_addr
, ntohs(lsin6
->sin6_port
),
615 ntohs(m_lsin6
->sin6_port
),
616 &rsin6
->sin6_addr
, ntohs(rsin6
->sin6_port
),
617 ntohs(m_rsin6
->sin6_port
));
624 static int dump_listen_ep(int id
, void *p
, void *data
)
626 struct c4iw_listen_ep
*ep
= p
;
627 struct c4iw_debugfs_data
*epd
= data
;
631 space
= epd
->bufsize
- epd
->pos
- 1;
635 if (ep
->com
.local_addr
.ss_family
== AF_INET
) {
636 struct sockaddr_in
*lsin
= (struct sockaddr_in
*)
637 &ep
->com
.cm_id
->local_addr
;
638 struct sockaddr_in
*m_lsin
= (struct sockaddr_in
*)
639 &ep
->com
.cm_id
->m_local_addr
;
641 cc
= snprintf(epd
->buf
+ epd
->pos
, space
,
642 "ep %p cm_id %p state %d flags 0x%lx stid %d "
643 "backlog %d %pI4:%d/%d\n",
644 ep
, ep
->com
.cm_id
, (int)ep
->com
.state
,
645 ep
->com
.flags
, ep
->stid
, ep
->backlog
,
646 &lsin
->sin_addr
, ntohs(lsin
->sin_port
),
647 ntohs(m_lsin
->sin_port
));
649 struct sockaddr_in6
*lsin6
= (struct sockaddr_in6
*)
650 &ep
->com
.cm_id
->local_addr
;
651 struct sockaddr_in6
*m_lsin6
= (struct sockaddr_in6
*)
652 &ep
->com
.cm_id
->m_local_addr
;
654 cc
= snprintf(epd
->buf
+ epd
->pos
, space
,
655 "ep %p cm_id %p state %d flags 0x%lx stid %d "
656 "backlog %d %pI6:%d/%d\n",
657 ep
, ep
->com
.cm_id
, (int)ep
->com
.state
,
658 ep
->com
.flags
, ep
->stid
, ep
->backlog
,
659 &lsin6
->sin6_addr
, ntohs(lsin6
->sin6_port
),
660 ntohs(m_lsin6
->sin6_port
));
667 static int ep_release(struct inode
*inode
, struct file
*file
)
669 struct c4iw_debugfs_data
*epd
= file
->private_data
;
671 pr_info("%s null qpd?\n", __func__
);
679 static int ep_open(struct inode
*inode
, struct file
*file
)
681 struct c4iw_debugfs_data
*epd
;
685 epd
= kmalloc(sizeof(*epd
), GFP_KERNEL
);
690 epd
->devp
= inode
->i_private
;
693 spin_lock_irq(&epd
->devp
->lock
);
694 idr_for_each(&epd
->devp
->hwtid_idr
, count_idrs
, &count
);
695 idr_for_each(&epd
->devp
->atid_idr
, count_idrs
, &count
);
696 idr_for_each(&epd
->devp
->stid_idr
, count_idrs
, &count
);
697 spin_unlock_irq(&epd
->devp
->lock
);
699 epd
->bufsize
= count
* 240;
700 epd
->buf
= vmalloc(epd
->bufsize
);
706 spin_lock_irq(&epd
->devp
->lock
);
707 idr_for_each(&epd
->devp
->hwtid_idr
, dump_ep
, epd
);
708 idr_for_each(&epd
->devp
->atid_idr
, dump_ep
, epd
);
709 idr_for_each(&epd
->devp
->stid_idr
, dump_listen_ep
, epd
);
710 spin_unlock_irq(&epd
->devp
->lock
);
712 file
->private_data
= epd
;
720 static const struct file_operations ep_debugfs_fops
= {
721 .owner
= THIS_MODULE
,
723 .release
= ep_release
,
724 .read
= debugfs_read
,
727 static int setup_debugfs(struct c4iw_dev
*devp
)
729 if (!devp
->debugfs_root
)
732 debugfs_create_file_size("qps", S_IWUSR
, devp
->debugfs_root
,
733 (void *)devp
, &qp_debugfs_fops
, 4096);
735 debugfs_create_file_size("stags", S_IWUSR
, devp
->debugfs_root
,
736 (void *)devp
, &stag_debugfs_fops
, 4096);
738 debugfs_create_file_size("stats", S_IWUSR
, devp
->debugfs_root
,
739 (void *)devp
, &stats_debugfs_fops
, 4096);
741 debugfs_create_file_size("eps", S_IWUSR
, devp
->debugfs_root
,
742 (void *)devp
, &ep_debugfs_fops
, 4096);
745 debugfs_create_file_size("wr_log", S_IWUSR
, devp
->debugfs_root
,
746 (void *)devp
, &wr_log_debugfs_fops
, 4096);
750 void c4iw_release_dev_ucontext(struct c4iw_rdev
*rdev
,
751 struct c4iw_dev_ucontext
*uctx
)
753 struct list_head
*pos
, *nxt
;
754 struct c4iw_qid_list
*entry
;
756 mutex_lock(&uctx
->lock
);
757 list_for_each_safe(pos
, nxt
, &uctx
->qpids
) {
758 entry
= list_entry(pos
, struct c4iw_qid_list
, entry
);
759 list_del_init(&entry
->entry
);
760 if (!(entry
->qid
& rdev
->qpmask
)) {
761 c4iw_put_resource(&rdev
->resource
.qid_table
,
763 mutex_lock(&rdev
->stats
.lock
);
764 rdev
->stats
.qid
.cur
-= rdev
->qpmask
+ 1;
765 mutex_unlock(&rdev
->stats
.lock
);
770 list_for_each_safe(pos
, nxt
, &uctx
->qpids
) {
771 entry
= list_entry(pos
, struct c4iw_qid_list
, entry
);
772 list_del_init(&entry
->entry
);
775 mutex_unlock(&uctx
->lock
);
778 void c4iw_init_dev_ucontext(struct c4iw_rdev
*rdev
,
779 struct c4iw_dev_ucontext
*uctx
)
781 INIT_LIST_HEAD(&uctx
->qpids
);
782 INIT_LIST_HEAD(&uctx
->cqids
);
783 mutex_init(&uctx
->lock
);
786 /* Caller takes care of locking if needed */
787 static int c4iw_rdev_open(struct c4iw_rdev
*rdev
)
791 c4iw_init_dev_ucontext(rdev
, &rdev
->uctx
);
794 * This implementation assumes udb_density == ucq_density! Eventually
795 * we might need to support this but for now fail the open. Also the
796 * cqid and qpid range must match for now.
798 if (rdev
->lldi
.udb_density
!= rdev
->lldi
.ucq_density
) {
799 pr_err(MOD
"%s: unsupported udb/ucq densities %u/%u\n",
800 pci_name(rdev
->lldi
.pdev
), rdev
->lldi
.udb_density
,
801 rdev
->lldi
.ucq_density
);
804 if (rdev
->lldi
.vr
->qp
.start
!= rdev
->lldi
.vr
->cq
.start
||
805 rdev
->lldi
.vr
->qp
.size
!= rdev
->lldi
.vr
->cq
.size
) {
806 pr_err(MOD
"%s: unsupported qp and cq id ranges "
807 "qp start %u size %u cq start %u size %u\n",
808 pci_name(rdev
->lldi
.pdev
), rdev
->lldi
.vr
->qp
.start
,
809 rdev
->lldi
.vr
->qp
.size
, rdev
->lldi
.vr
->cq
.size
,
810 rdev
->lldi
.vr
->cq
.size
);
814 rdev
->qpmask
= rdev
->lldi
.udb_density
- 1;
815 rdev
->cqmask
= rdev
->lldi
.ucq_density
- 1;
816 PDBG("%s dev %s stag start 0x%0x size 0x%0x num stags %d "
817 "pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x "
818 "qp qid start %u size %u cq qid start %u size %u\n",
819 __func__
, pci_name(rdev
->lldi
.pdev
), rdev
->lldi
.vr
->stag
.start
,
820 rdev
->lldi
.vr
->stag
.size
, c4iw_num_stags(rdev
),
821 rdev
->lldi
.vr
->pbl
.start
,
822 rdev
->lldi
.vr
->pbl
.size
, rdev
->lldi
.vr
->rq
.start
,
823 rdev
->lldi
.vr
->rq
.size
,
824 rdev
->lldi
.vr
->qp
.start
,
825 rdev
->lldi
.vr
->qp
.size
,
826 rdev
->lldi
.vr
->cq
.start
,
827 rdev
->lldi
.vr
->cq
.size
);
828 PDBG("udb %pR db_reg %p gts_reg %p "
829 "qpmask 0x%x cqmask 0x%x\n",
830 &rdev
->lldi
.pdev
->resource
[2],
831 rdev
->lldi
.db_reg
, rdev
->lldi
.gts_reg
,
832 rdev
->qpmask
, rdev
->cqmask
);
834 if (c4iw_num_stags(rdev
) == 0)
837 rdev
->stats
.pd
.total
= T4_MAX_NUM_PD
;
838 rdev
->stats
.stag
.total
= rdev
->lldi
.vr
->stag
.size
;
839 rdev
->stats
.pbl
.total
= rdev
->lldi
.vr
->pbl
.size
;
840 rdev
->stats
.rqt
.total
= rdev
->lldi
.vr
->rq
.size
;
841 rdev
->stats
.ocqp
.total
= rdev
->lldi
.vr
->ocq
.size
;
842 rdev
->stats
.qid
.total
= rdev
->lldi
.vr
->qp
.size
;
844 err
= c4iw_init_resource(rdev
, c4iw_num_stags(rdev
), T4_MAX_NUM_PD
);
846 printk(KERN_ERR MOD
"error %d initializing resources\n", err
);
849 err
= c4iw_pblpool_create(rdev
);
851 printk(KERN_ERR MOD
"error %d initializing pbl pool\n", err
);
852 goto destroy_resource
;
854 err
= c4iw_rqtpool_create(rdev
);
856 printk(KERN_ERR MOD
"error %d initializing rqt pool\n", err
);
857 goto destroy_pblpool
;
859 err
= c4iw_ocqp_pool_create(rdev
);
861 printk(KERN_ERR MOD
"error %d initializing ocqp pool\n", err
);
862 goto destroy_rqtpool
;
864 rdev
->status_page
= (struct t4_dev_status_page
*)
865 __get_free_page(GFP_KERNEL
);
866 if (!rdev
->status_page
) {
868 goto destroy_ocqp_pool
;
870 rdev
->status_page
->qp_start
= rdev
->lldi
.vr
->qp
.start
;
871 rdev
->status_page
->qp_size
= rdev
->lldi
.vr
->qp
.size
;
872 rdev
->status_page
->cq_start
= rdev
->lldi
.vr
->cq
.start
;
873 rdev
->status_page
->cq_size
= rdev
->lldi
.vr
->cq
.size
;
876 rdev
->wr_log
= kzalloc((1 << c4iw_wr_log_size_order
) *
877 sizeof(*rdev
->wr_log
), GFP_KERNEL
);
879 rdev
->wr_log_size
= 1 << c4iw_wr_log_size_order
;
880 atomic_set(&rdev
->wr_log_idx
, 0);
884 rdev
->free_workq
= create_singlethread_workqueue("iw_cxgb4_free");
885 if (!rdev
->free_workq
) {
887 goto err_free_status_page
;
890 rdev
->status_page
->db_off
= 0;
893 err_free_status_page
:
894 free_page((unsigned long)rdev
->status_page
);
896 c4iw_ocqp_pool_destroy(rdev
);
898 c4iw_rqtpool_destroy(rdev
);
900 c4iw_pblpool_destroy(rdev
);
902 c4iw_destroy_resource(&rdev
->resource
);
906 static void c4iw_rdev_close(struct c4iw_rdev
*rdev
)
908 destroy_workqueue(rdev
->free_workq
);
910 free_page((unsigned long)rdev
->status_page
);
911 c4iw_pblpool_destroy(rdev
);
912 c4iw_rqtpool_destroy(rdev
);
913 c4iw_destroy_resource(&rdev
->resource
);
916 static void c4iw_dealloc(struct uld_ctx
*ctx
)
918 c4iw_rdev_close(&ctx
->dev
->rdev
);
919 WARN_ON_ONCE(!idr_is_empty(&ctx
->dev
->cqidr
));
920 idr_destroy(&ctx
->dev
->cqidr
);
921 WARN_ON_ONCE(!idr_is_empty(&ctx
->dev
->qpidr
));
922 idr_destroy(&ctx
->dev
->qpidr
);
923 WARN_ON_ONCE(!idr_is_empty(&ctx
->dev
->mmidr
));
924 idr_destroy(&ctx
->dev
->mmidr
);
925 wait_event(ctx
->dev
->wait
, idr_is_empty(&ctx
->dev
->hwtid_idr
));
926 idr_destroy(&ctx
->dev
->hwtid_idr
);
927 idr_destroy(&ctx
->dev
->stid_idr
);
928 idr_destroy(&ctx
->dev
->atid_idr
);
929 if (ctx
->dev
->rdev
.bar2_kva
)
930 iounmap(ctx
->dev
->rdev
.bar2_kva
);
931 if (ctx
->dev
->rdev
.oc_mw_kva
)
932 iounmap(ctx
->dev
->rdev
.oc_mw_kva
);
933 ib_dealloc_device(&ctx
->dev
->ibdev
);
937 static void c4iw_remove(struct uld_ctx
*ctx
)
939 PDBG("%s c4iw_dev %p\n", __func__
, ctx
->dev
);
940 c4iw_unregister_device(ctx
->dev
);
944 static int rdma_supported(const struct cxgb4_lld_info
*infop
)
946 return infop
->vr
->stag
.size
> 0 && infop
->vr
->pbl
.size
> 0 &&
947 infop
->vr
->rq
.size
> 0 && infop
->vr
->qp
.size
> 0 &&
948 infop
->vr
->cq
.size
> 0;
951 static struct c4iw_dev
*c4iw_alloc(const struct cxgb4_lld_info
*infop
)
953 struct c4iw_dev
*devp
;
956 if (!rdma_supported(infop
)) {
957 printk(KERN_INFO MOD
"%s: RDMA not supported on this device.\n",
958 pci_name(infop
->pdev
));
959 return ERR_PTR(-ENOSYS
);
961 if (!ocqp_supported(infop
))
962 pr_info("%s: On-Chip Queues not supported on this device.\n",
963 pci_name(infop
->pdev
));
965 devp
= (struct c4iw_dev
*)ib_alloc_device(sizeof(*devp
));
967 printk(KERN_ERR MOD
"Cannot allocate ib device\n");
968 return ERR_PTR(-ENOMEM
);
970 devp
->rdev
.lldi
= *infop
;
972 /* init various hw-queue params based on lld info */
973 PDBG("%s: Ing. padding boundary is %d, egrsstatuspagesize = %d\n",
974 __func__
, devp
->rdev
.lldi
.sge_ingpadboundary
,
975 devp
->rdev
.lldi
.sge_egrstatuspagesize
);
977 devp
->rdev
.hw_queue
.t4_eq_status_entries
=
978 devp
->rdev
.lldi
.sge_ingpadboundary
> 64 ? 2 : 1;
979 devp
->rdev
.hw_queue
.t4_max_eq_size
= 65520;
980 devp
->rdev
.hw_queue
.t4_max_iq_size
= 65520;
981 devp
->rdev
.hw_queue
.t4_max_rq_size
= 8192 -
982 devp
->rdev
.hw_queue
.t4_eq_status_entries
- 1;
983 devp
->rdev
.hw_queue
.t4_max_sq_size
=
984 devp
->rdev
.hw_queue
.t4_max_eq_size
-
985 devp
->rdev
.hw_queue
.t4_eq_status_entries
- 1;
986 devp
->rdev
.hw_queue
.t4_max_qp_depth
=
987 devp
->rdev
.hw_queue
.t4_max_rq_size
;
988 devp
->rdev
.hw_queue
.t4_max_cq_depth
=
989 devp
->rdev
.hw_queue
.t4_max_iq_size
- 2;
990 devp
->rdev
.hw_queue
.t4_stat_len
=
991 devp
->rdev
.lldi
.sge_egrstatuspagesize
;
994 * For T5/T6 devices, we map all of BAR2 with WC.
995 * For T4 devices with onchip qp mem, we map only that part
998 devp
->rdev
.bar2_pa
= pci_resource_start(devp
->rdev
.lldi
.pdev
, 2);
999 if (!is_t4(devp
->rdev
.lldi
.adapter_type
)) {
1000 devp
->rdev
.bar2_kva
= ioremap_wc(devp
->rdev
.bar2_pa
,
1001 pci_resource_len(devp
->rdev
.lldi
.pdev
, 2));
1002 if (!devp
->rdev
.bar2_kva
) {
1003 pr_err(MOD
"Unable to ioremap BAR2\n");
1004 ib_dealloc_device(&devp
->ibdev
);
1005 return ERR_PTR(-EINVAL
);
1007 } else if (ocqp_supported(infop
)) {
1008 devp
->rdev
.oc_mw_pa
=
1009 pci_resource_start(devp
->rdev
.lldi
.pdev
, 2) +
1010 pci_resource_len(devp
->rdev
.lldi
.pdev
, 2) -
1011 roundup_pow_of_two(devp
->rdev
.lldi
.vr
->ocq
.size
);
1012 devp
->rdev
.oc_mw_kva
= ioremap_wc(devp
->rdev
.oc_mw_pa
,
1013 devp
->rdev
.lldi
.vr
->ocq
.size
);
1014 if (!devp
->rdev
.oc_mw_kva
) {
1015 pr_err(MOD
"Unable to ioremap onchip mem\n");
1016 ib_dealloc_device(&devp
->ibdev
);
1017 return ERR_PTR(-EINVAL
);
1021 PDBG(KERN_INFO MOD
"ocq memory: "
1022 "hw_start 0x%x size %u mw_pa 0x%lx mw_kva %p\n",
1023 devp
->rdev
.lldi
.vr
->ocq
.start
, devp
->rdev
.lldi
.vr
->ocq
.size
,
1024 devp
->rdev
.oc_mw_pa
, devp
->rdev
.oc_mw_kva
);
1026 ret
= c4iw_rdev_open(&devp
->rdev
);
1028 printk(KERN_ERR MOD
"Unable to open CXIO rdev err %d\n", ret
);
1029 ib_dealloc_device(&devp
->ibdev
);
1030 return ERR_PTR(ret
);
1033 idr_init(&devp
->cqidr
);
1034 idr_init(&devp
->qpidr
);
1035 idr_init(&devp
->mmidr
);
1036 idr_init(&devp
->hwtid_idr
);
1037 idr_init(&devp
->stid_idr
);
1038 idr_init(&devp
->atid_idr
);
1039 spin_lock_init(&devp
->lock
);
1040 mutex_init(&devp
->rdev
.stats
.lock
);
1041 mutex_init(&devp
->db_mutex
);
1042 INIT_LIST_HEAD(&devp
->db_fc_list
);
1043 init_waitqueue_head(&devp
->wait
);
1044 devp
->avail_ird
= devp
->rdev
.lldi
.max_ird_adapter
;
1046 if (c4iw_debugfs_root
) {
1047 devp
->debugfs_root
= debugfs_create_dir(
1048 pci_name(devp
->rdev
.lldi
.pdev
),
1050 setup_debugfs(devp
);
1057 static void *c4iw_uld_add(const struct cxgb4_lld_info
*infop
)
1059 struct uld_ctx
*ctx
;
1060 static int vers_printed
;
1063 if (!vers_printed
++)
1064 pr_info("Chelsio T4/T5 RDMA Driver - version %s\n",
1067 ctx
= kzalloc(sizeof *ctx
, GFP_KERNEL
);
1069 ctx
= ERR_PTR(-ENOMEM
);
1074 PDBG("%s found device %s nchan %u nrxq %u ntxq %u nports %u\n",
1075 __func__
, pci_name(ctx
->lldi
.pdev
),
1076 ctx
->lldi
.nchan
, ctx
->lldi
.nrxq
,
1077 ctx
->lldi
.ntxq
, ctx
->lldi
.nports
);
1079 mutex_lock(&dev_mutex
);
1080 list_add_tail(&ctx
->entry
, &uld_ctx_list
);
1081 mutex_unlock(&dev_mutex
);
1083 for (i
= 0; i
< ctx
->lldi
.nrxq
; i
++)
1084 PDBG("rxqid[%u] %u\n", i
, ctx
->lldi
.rxq_ids
[i
]);
1089 static inline struct sk_buff
*copy_gl_to_skb_pkt(const struct pkt_gl
*gl
,
1093 struct sk_buff
*skb
;
1096 * Allocate space for cpl_pass_accept_req which will be synthesized by
1097 * driver. Once the driver synthesizes the request the skb will go
1098 * through the regular cpl_pass_accept_req processing.
1099 * The math here assumes sizeof cpl_pass_accept_req >= sizeof
1102 skb
= alloc_skb(gl
->tot_len
+ sizeof(struct cpl_pass_accept_req
) +
1103 sizeof(struct rss_header
) - pktshift
, GFP_ATOMIC
);
1107 __skb_put(skb
, gl
->tot_len
+ sizeof(struct cpl_pass_accept_req
) +
1108 sizeof(struct rss_header
) - pktshift
);
1111 * This skb will contain:
1112 * rss_header from the rspq descriptor (1 flit)
1113 * cpl_rx_pkt struct from the rspq descriptor (2 flits)
1114 * space for the difference between the size of an
1115 * rx_pkt and pass_accept_req cpl (1 flit)
1116 * the packet data from the gl
1118 skb_copy_to_linear_data(skb
, rsp
, sizeof(struct cpl_pass_accept_req
) +
1119 sizeof(struct rss_header
));
1120 skb_copy_to_linear_data_offset(skb
, sizeof(struct rss_header
) +
1121 sizeof(struct cpl_pass_accept_req
),
1123 gl
->tot_len
- pktshift
);
1127 static inline int recv_rx_pkt(struct c4iw_dev
*dev
, const struct pkt_gl
*gl
,
1130 unsigned int opcode
= *(u8
*)rsp
;
1131 struct sk_buff
*skb
;
1133 if (opcode
!= CPL_RX_PKT
)
1136 skb
= copy_gl_to_skb_pkt(gl
, rsp
, dev
->rdev
.lldi
.sge_pktshift
);
1140 if (c4iw_handlers
[opcode
] == NULL
) {
1141 pr_info("%s no handler opcode 0x%x...\n", __func__
,
1146 c4iw_handlers
[opcode
](dev
, skb
);
1152 static int c4iw_uld_rx_handler(void *handle
, const __be64
*rsp
,
1153 const struct pkt_gl
*gl
)
1155 struct uld_ctx
*ctx
= handle
;
1156 struct c4iw_dev
*dev
= ctx
->dev
;
1157 struct sk_buff
*skb
;
1161 /* omit RSS and rsp_ctrl at end of descriptor */
1162 unsigned int len
= 64 - sizeof(struct rsp_ctrl
) - 8;
1164 skb
= alloc_skb(256, GFP_ATOMIC
);
1167 __skb_put(skb
, len
);
1168 skb_copy_to_linear_data(skb
, &rsp
[1], len
);
1169 } else if (gl
== CXGB4_MSG_AN
) {
1170 const struct rsp_ctrl
*rc
= (void *)rsp
;
1172 u32 qid
= be32_to_cpu(rc
->pldbuflen_qid
);
1173 c4iw_ev_handler(dev
, qid
);
1175 } else if (unlikely(*(u8
*)rsp
!= *(u8
*)gl
->va
)) {
1176 if (recv_rx_pkt(dev
, gl
, rsp
))
1179 pr_info("%s: unexpected FL contents at %p, " \
1180 "RSS %#llx, FL %#llx, len %u\n",
1181 pci_name(ctx
->lldi
.pdev
), gl
->va
,
1182 (unsigned long long)be64_to_cpu(*rsp
),
1183 (unsigned long long)be64_to_cpu(
1184 *(__force __be64
*)gl
->va
),
1189 skb
= cxgb4_pktgl_to_skb(gl
, 128, 128);
1194 opcode
= *(u8
*)rsp
;
1195 if (c4iw_handlers
[opcode
]) {
1196 c4iw_handlers
[opcode
](dev
, skb
);
1198 pr_info("%s no handler opcode 0x%x...\n", __func__
,
1208 static int c4iw_uld_state_change(void *handle
, enum cxgb4_state new_state
)
1210 struct uld_ctx
*ctx
= handle
;
1212 PDBG("%s new_state %u\n", __func__
, new_state
);
1213 switch (new_state
) {
1214 case CXGB4_STATE_UP
:
1215 printk(KERN_INFO MOD
"%s: Up\n", pci_name(ctx
->lldi
.pdev
));
1219 ctx
->dev
= c4iw_alloc(&ctx
->lldi
);
1220 if (IS_ERR(ctx
->dev
)) {
1222 "%s: initialization failed: %ld\n",
1223 pci_name(ctx
->lldi
.pdev
),
1228 ret
= c4iw_register_device(ctx
->dev
);
1231 "%s: RDMA registration failed: %d\n",
1232 pci_name(ctx
->lldi
.pdev
), ret
);
1237 case CXGB4_STATE_DOWN
:
1238 printk(KERN_INFO MOD
"%s: Down\n",
1239 pci_name(ctx
->lldi
.pdev
));
1243 case CXGB4_STATE_START_RECOVERY
:
1244 printk(KERN_INFO MOD
"%s: Fatal Error\n",
1245 pci_name(ctx
->lldi
.pdev
));
1247 struct ib_event event
;
1249 ctx
->dev
->rdev
.flags
|= T4_FATAL_ERROR
;
1250 memset(&event
, 0, sizeof event
);
1251 event
.event
= IB_EVENT_DEVICE_FATAL
;
1252 event
.device
= &ctx
->dev
->ibdev
;
1253 ib_dispatch_event(&event
);
1257 case CXGB4_STATE_DETACH
:
1258 printk(KERN_INFO MOD
"%s: Detach\n",
1259 pci_name(ctx
->lldi
.pdev
));
1267 static int disable_qp_db(int id
, void *p
, void *data
)
1269 struct c4iw_qp
*qp
= p
;
1271 t4_disable_wq_db(&qp
->wq
);
1275 static void stop_queues(struct uld_ctx
*ctx
)
1277 unsigned long flags
;
1279 spin_lock_irqsave(&ctx
->dev
->lock
, flags
);
1280 ctx
->dev
->rdev
.stats
.db_state_transitions
++;
1281 ctx
->dev
->db_state
= STOPPED
;
1282 if (ctx
->dev
->rdev
.flags
& T4_STATUS_PAGE_DISABLED
)
1283 idr_for_each(&ctx
->dev
->qpidr
, disable_qp_db
, NULL
);
1285 ctx
->dev
->rdev
.status_page
->db_off
= 1;
1286 spin_unlock_irqrestore(&ctx
->dev
->lock
, flags
);
1289 static int enable_qp_db(int id
, void *p
, void *data
)
1291 struct c4iw_qp
*qp
= p
;
1293 t4_enable_wq_db(&qp
->wq
);
1297 static void resume_rc_qp(struct c4iw_qp
*qp
)
1299 spin_lock(&qp
->lock
);
1300 t4_ring_sq_db(&qp
->wq
, qp
->wq
.sq
.wq_pidx_inc
, NULL
);
1301 qp
->wq
.sq
.wq_pidx_inc
= 0;
1302 t4_ring_rq_db(&qp
->wq
, qp
->wq
.rq
.wq_pidx_inc
, NULL
);
1303 qp
->wq
.rq
.wq_pidx_inc
= 0;
1304 spin_unlock(&qp
->lock
);
1307 static void resume_a_chunk(struct uld_ctx
*ctx
)
1312 for (i
= 0; i
< DB_FC_RESUME_SIZE
; i
++) {
1313 qp
= list_first_entry(&ctx
->dev
->db_fc_list
, struct c4iw_qp
,
1315 list_del_init(&qp
->db_fc_entry
);
1317 if (list_empty(&ctx
->dev
->db_fc_list
))
1322 static void resume_queues(struct uld_ctx
*ctx
)
1324 spin_lock_irq(&ctx
->dev
->lock
);
1325 if (ctx
->dev
->db_state
!= STOPPED
)
1327 ctx
->dev
->db_state
= FLOW_CONTROL
;
1329 if (list_empty(&ctx
->dev
->db_fc_list
)) {
1330 WARN_ON(ctx
->dev
->db_state
!= FLOW_CONTROL
);
1331 ctx
->dev
->db_state
= NORMAL
;
1332 ctx
->dev
->rdev
.stats
.db_state_transitions
++;
1333 if (ctx
->dev
->rdev
.flags
& T4_STATUS_PAGE_DISABLED
) {
1334 idr_for_each(&ctx
->dev
->qpidr
, enable_qp_db
,
1337 ctx
->dev
->rdev
.status_page
->db_off
= 0;
1341 if (cxgb4_dbfifo_count(ctx
->dev
->rdev
.lldi
.ports
[0], 1)
1342 < (ctx
->dev
->rdev
.lldi
.dbfifo_int_thresh
<<
1343 DB_FC_DRAIN_THRESH
)) {
1344 resume_a_chunk(ctx
);
1346 if (!list_empty(&ctx
->dev
->db_fc_list
)) {
1347 spin_unlock_irq(&ctx
->dev
->lock
);
1348 if (DB_FC_RESUME_DELAY
) {
1349 set_current_state(TASK_UNINTERRUPTIBLE
);
1350 schedule_timeout(DB_FC_RESUME_DELAY
);
1352 spin_lock_irq(&ctx
->dev
->lock
);
1353 if (ctx
->dev
->db_state
!= FLOW_CONTROL
)
1359 if (ctx
->dev
->db_state
!= NORMAL
)
1360 ctx
->dev
->rdev
.stats
.db_fc_interruptions
++;
1361 spin_unlock_irq(&ctx
->dev
->lock
);
1366 struct c4iw_qp
**qps
;
1369 static int add_and_ref_qp(int id
, void *p
, void *data
)
1371 struct qp_list
*qp_listp
= data
;
1372 struct c4iw_qp
*qp
= p
;
1374 c4iw_qp_add_ref(&qp
->ibqp
);
1375 qp_listp
->qps
[qp_listp
->idx
++] = qp
;
1379 static int count_qps(int id
, void *p
, void *data
)
1381 unsigned *countp
= data
;
1386 static void deref_qps(struct qp_list
*qp_list
)
1390 for (idx
= 0; idx
< qp_list
->idx
; idx
++)
1391 c4iw_qp_rem_ref(&qp_list
->qps
[idx
]->ibqp
);
1394 static void recover_lost_dbs(struct uld_ctx
*ctx
, struct qp_list
*qp_list
)
1399 for (idx
= 0; idx
< qp_list
->idx
; idx
++) {
1400 struct c4iw_qp
*qp
= qp_list
->qps
[idx
];
1402 spin_lock_irq(&qp
->rhp
->lock
);
1403 spin_lock(&qp
->lock
);
1404 ret
= cxgb4_sync_txq_pidx(qp
->rhp
->rdev
.lldi
.ports
[0],
1406 t4_sq_host_wq_pidx(&qp
->wq
),
1407 t4_sq_wq_size(&qp
->wq
));
1409 pr_err(MOD
"%s: Fatal error - "
1410 "DB overflow recovery failed - "
1411 "error syncing SQ qid %u\n",
1412 pci_name(ctx
->lldi
.pdev
), qp
->wq
.sq
.qid
);
1413 spin_unlock(&qp
->lock
);
1414 spin_unlock_irq(&qp
->rhp
->lock
);
1417 qp
->wq
.sq
.wq_pidx_inc
= 0;
1419 ret
= cxgb4_sync_txq_pidx(qp
->rhp
->rdev
.lldi
.ports
[0],
1421 t4_rq_host_wq_pidx(&qp
->wq
),
1422 t4_rq_wq_size(&qp
->wq
));
1425 pr_err(MOD
"%s: Fatal error - "
1426 "DB overflow recovery failed - "
1427 "error syncing RQ qid %u\n",
1428 pci_name(ctx
->lldi
.pdev
), qp
->wq
.rq
.qid
);
1429 spin_unlock(&qp
->lock
);
1430 spin_unlock_irq(&qp
->rhp
->lock
);
1433 qp
->wq
.rq
.wq_pidx_inc
= 0;
1434 spin_unlock(&qp
->lock
);
1435 spin_unlock_irq(&qp
->rhp
->lock
);
1437 /* Wait for the dbfifo to drain */
1438 while (cxgb4_dbfifo_count(qp
->rhp
->rdev
.lldi
.ports
[0], 1) > 0) {
1439 set_current_state(TASK_UNINTERRUPTIBLE
);
1440 schedule_timeout(usecs_to_jiffies(10));
1445 static void recover_queues(struct uld_ctx
*ctx
)
1448 struct qp_list qp_list
;
1451 /* slow everybody down */
1452 set_current_state(TASK_UNINTERRUPTIBLE
);
1453 schedule_timeout(usecs_to_jiffies(1000));
1455 /* flush the SGE contexts */
1456 ret
= cxgb4_flush_eq_cache(ctx
->dev
->rdev
.lldi
.ports
[0]);
1458 printk(KERN_ERR MOD
"%s: Fatal error - DB overflow recovery failed\n",
1459 pci_name(ctx
->lldi
.pdev
));
1463 /* Count active queues so we can build a list of queues to recover */
1464 spin_lock_irq(&ctx
->dev
->lock
);
1465 WARN_ON(ctx
->dev
->db_state
!= STOPPED
);
1466 ctx
->dev
->db_state
= RECOVERY
;
1467 idr_for_each(&ctx
->dev
->qpidr
, count_qps
, &count
);
1469 qp_list
.qps
= kzalloc(count
* sizeof *qp_list
.qps
, GFP_ATOMIC
);
1471 spin_unlock_irq(&ctx
->dev
->lock
);
1476 /* add and ref each qp so it doesn't get freed */
1477 idr_for_each(&ctx
->dev
->qpidr
, add_and_ref_qp
, &qp_list
);
1479 spin_unlock_irq(&ctx
->dev
->lock
);
1481 /* now traverse the list in a safe context to recover the db state*/
1482 recover_lost_dbs(ctx
, &qp_list
);
1484 /* we're almost done! deref the qps and clean up */
1485 deref_qps(&qp_list
);
1488 spin_lock_irq(&ctx
->dev
->lock
);
1489 WARN_ON(ctx
->dev
->db_state
!= RECOVERY
);
1490 ctx
->dev
->db_state
= STOPPED
;
1491 spin_unlock_irq(&ctx
->dev
->lock
);
1494 static int c4iw_uld_control(void *handle
, enum cxgb4_control control
, ...)
1496 struct uld_ctx
*ctx
= handle
;
1499 case CXGB4_CONTROL_DB_FULL
:
1501 ctx
->dev
->rdev
.stats
.db_full
++;
1503 case CXGB4_CONTROL_DB_EMPTY
:
1505 mutex_lock(&ctx
->dev
->rdev
.stats
.lock
);
1506 ctx
->dev
->rdev
.stats
.db_empty
++;
1507 mutex_unlock(&ctx
->dev
->rdev
.stats
.lock
);
1509 case CXGB4_CONTROL_DB_DROP
:
1510 recover_queues(ctx
);
1511 mutex_lock(&ctx
->dev
->rdev
.stats
.lock
);
1512 ctx
->dev
->rdev
.stats
.db_drop
++;
1513 mutex_unlock(&ctx
->dev
->rdev
.stats
.lock
);
1516 printk(KERN_WARNING MOD
"%s: unknown control cmd %u\n",
1517 pci_name(ctx
->lldi
.pdev
), control
);
1523 static struct cxgb4_uld_info c4iw_uld_info
= {
1525 .nrxq
= MAX_ULD_QSETS
,
1526 .ntxq
= MAX_ULD_QSETS
,
1530 .add
= c4iw_uld_add
,
1531 .rx_handler
= c4iw_uld_rx_handler
,
1532 .state_change
= c4iw_uld_state_change
,
1533 .control
= c4iw_uld_control
,
1536 static int __init
c4iw_init_module(void)
1540 err
= c4iw_cm_init();
1544 c4iw_debugfs_root
= debugfs_create_dir(DRV_NAME
, NULL
);
1545 if (!c4iw_debugfs_root
)
1546 printk(KERN_WARNING MOD
1547 "could not create debugfs entry, continuing\n");
1549 cxgb4_register_uld(CXGB4_ULD_RDMA
, &c4iw_uld_info
);
1554 static void __exit
c4iw_exit_module(void)
1556 struct uld_ctx
*ctx
, *tmp
;
1558 mutex_lock(&dev_mutex
);
1559 list_for_each_entry_safe(ctx
, tmp
, &uld_ctx_list
, entry
) {
1564 mutex_unlock(&dev_mutex
);
1565 cxgb4_unregister_uld(CXGB4_ULD_RDMA
);
1567 debugfs_remove_recursive(c4iw_debugfs_root
);
1570 module_init(c4iw_init_module
);
1571 module_exit(c4iw_exit_module
);