?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
net: move procfs code to net/core/net-procfs.c
[linux/fpc-iii.git] / drivers / infiniband / hw / cxgb4 / device.c
blobba11c76c0b5acab8eb498dc31fa6a674096726ef
1 /*
2 * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved.
3 *
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:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
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.
22 *
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
30 * SOFTWARE.
31 */
32 #include <linux/module.h>
33 #include <linux/moduleparam.h>
34 #include <linux/debugfs.h>
35 #include <linux/vmalloc.h>
36
37 #include <rdma/ib_verbs.h>
38
39 #include "iw_cxgb4.h"
40
41 #define DRV_VERSION "0.1"
42
43 MODULE_AUTHOR("Steve Wise");
44 MODULE_DESCRIPTION("Chelsio T4 RDMA Driver");
45 MODULE_LICENSE("Dual BSD/GPL");
46 MODULE_VERSION(DRV_VERSION);
47
48 struct uld_ctx {
49 struct list_head entry;
50 struct cxgb4_lld_info lldi;
51 struct c4iw_dev *dev;
52 };
53
54 static LIST_HEAD(uld_ctx_list);
55 static DEFINE_MUTEX(dev_mutex);
56
57 static struct dentry *c4iw_debugfs_root;
58
59 struct c4iw_debugfs_data {
60 struct c4iw_dev *devp;
61 char *buf;
62 int bufsize;
63 int pos;
64 };
65
66 static int count_idrs(int id, void *p, void *data)
67 {
68 int *countp = data;
69
70 *countp = *countp + 1;
71 return 0;
72 }
73
74 static ssize_t debugfs_read(struct file *file, char __user *buf, size_t count,
75 loff_t *ppos)
76 {
77 struct c4iw_debugfs_data *d = file->private_data;
78
79 return simple_read_from_buffer(buf, count, ppos, d->buf, d->pos);
80 }
81
82 static int dump_qp(int id, void *p, void *data)
83 {
84 struct c4iw_qp *qp = p;
85 struct c4iw_debugfs_data *qpd = data;
86 int space;
87 int cc;
88
89 if (id != qp->wq.sq.qid)
90 return 0;
91
92 space = qpd->bufsize - qpd->pos - 1;
93 if (space == 0)
94 return 1;
95
96 if (qp->ep)
97 cc = snprintf(qpd->buf + qpd->pos, space,
98 "qp sq id %u rq id %u state %u onchip %u "
99 "ep tid %u state %u %pI4:%u->%pI4:%u\n",
100 qp->wq.sq.qid, qp->wq.rq.qid, (int)qp->attr.state,
101 qp->wq.sq.flags & T4_SQ_ONCHIP,
102 qp->ep->hwtid, (int)qp->ep->com.state,
103 &qp->ep->com.local_addr.sin_addr.s_addr,
104 ntohs(qp->ep->com.local_addr.sin_port),
105 &qp->ep->com.remote_addr.sin_addr.s_addr,
106 ntohs(qp->ep->com.remote_addr.sin_port));
107 else
108 cc = snprintf(qpd->buf + qpd->pos, space,
109 "qp sq id %u rq id %u state %u onchip %u\n",
110 qp->wq.sq.qid, qp->wq.rq.qid,
111 (int)qp->attr.state,
112 qp->wq.sq.flags & T4_SQ_ONCHIP);
113 if (cc < space)
114 qpd->pos += cc;
115 return 0;
116 }
117
118 static int qp_release(struct inode *inode, struct file *file)
119 {
120 struct c4iw_debugfs_data *qpd = file->private_data;
121 if (!qpd) {
122 printk(KERN_INFO "%s null qpd?\n", __func__);
123 return 0;
124 }
125 vfree(qpd->buf);
126 kfree(qpd);
127 return 0;
128 }
129
130 static int qp_open(struct inode *inode, struct file *file)
131 {
132 struct c4iw_debugfs_data *qpd;
133 int ret = 0;
134 int count = 1;
135
136 qpd = kmalloc(sizeof *qpd, GFP_KERNEL);
137 if (!qpd) {
138 ret = -ENOMEM;
139 goto out;
140 }
141 qpd->devp = inode->i_private;
142 qpd->pos = 0;
143
144 spin_lock_irq(&qpd->devp->lock);
145 idr_for_each(&qpd->devp->qpidr, count_idrs, &count);
146 spin_unlock_irq(&qpd->devp->lock);
147
148 qpd->bufsize = count * 128;
149 qpd->buf = vmalloc(qpd->bufsize);
150 if (!qpd->buf) {
151 ret = -ENOMEM;
152 goto err1;
153 }
154
155 spin_lock_irq(&qpd->devp->lock);
156 idr_for_each(&qpd->devp->qpidr, dump_qp, qpd);
157 spin_unlock_irq(&qpd->devp->lock);
158
159 qpd->buf[qpd->pos++] = 0;
160 file->private_data = qpd;
161 goto out;
162 err1:
163 kfree(qpd);
164 out:
165 return ret;
166 }
167
168 static const struct file_operations qp_debugfs_fops = {
169 .owner = THIS_MODULE,
170 .open = qp_open,
171 .release = qp_release,
172 .read = debugfs_read,
173 .llseek = default_llseek,
174 };
175
176 static int dump_stag(int id, void *p, void *data)
177 {
178 struct c4iw_debugfs_data *stagd = data;
179 int space;
180 int cc;
181
182 space = stagd->bufsize - stagd->pos - 1;
183 if (space == 0)
184 return 1;
185
186 cc = snprintf(stagd->buf + stagd->pos, space, "0x%x\n", id<<8);
187 if (cc < space)
188 stagd->pos += cc;
189 return 0;
190 }
191
192 static int stag_release(struct inode *inode, struct file *file)
193 {
194 struct c4iw_debugfs_data *stagd = file->private_data;
195 if (!stagd) {
196 printk(KERN_INFO "%s null stagd?\n", __func__);
197 return 0;
198 }
199 kfree(stagd->buf);
200 kfree(stagd);
201 return 0;
202 }
203
204 static int stag_open(struct inode *inode, struct file *file)
205 {
206 struct c4iw_debugfs_data *stagd;
207 int ret = 0;
208 int count = 1;
209
210 stagd = kmalloc(sizeof *stagd, GFP_KERNEL);
211 if (!stagd) {
212 ret = -ENOMEM;
213 goto out;
214 }
215 stagd->devp = inode->i_private;
216 stagd->pos = 0;
217
218 spin_lock_irq(&stagd->devp->lock);
219 idr_for_each(&stagd->devp->mmidr, count_idrs, &count);
220 spin_unlock_irq(&stagd->devp->lock);
221
222 stagd->bufsize = count * sizeof("0x12345678\n");
223 stagd->buf = kmalloc(stagd->bufsize, GFP_KERNEL);
224 if (!stagd->buf) {
225 ret = -ENOMEM;
226 goto err1;
227 }
228
229 spin_lock_irq(&stagd->devp->lock);
230 idr_for_each(&stagd->devp->mmidr, dump_stag, stagd);
231 spin_unlock_irq(&stagd->devp->lock);
232
233 stagd->buf[stagd->pos++] = 0;
234 file->private_data = stagd;
235 goto out;
236 err1:
237 kfree(stagd);
238 out:
239 return ret;
240 }
241
242 static const struct file_operations stag_debugfs_fops = {
243 .owner = THIS_MODULE,
244 .open = stag_open,
245 .release = stag_release,
246 .read = debugfs_read,
247 .llseek = default_llseek,
248 };
249
250 static char *db_state_str[] = {"NORMAL", "FLOW_CONTROL", "RECOVERY"};
251
252 static int stats_show(struct seq_file *seq, void *v)
253 {
254 struct c4iw_dev *dev = seq->private;
255
256 seq_printf(seq, " Object: %10s %10s %10s %10s\n", "Total", "Current",
257 "Max", "Fail");
258 seq_printf(seq, " PDID: %10llu %10llu %10llu %10llu\n",
259 dev->rdev.stats.pd.total, dev->rdev.stats.pd.cur,
260 dev->rdev.stats.pd.max, dev->rdev.stats.pd.fail);
261 seq_printf(seq, " QID: %10llu %10llu %10llu %10llu\n",
262 dev->rdev.stats.qid.total, dev->rdev.stats.qid.cur,
263 dev->rdev.stats.qid.max, dev->rdev.stats.qid.fail);
264 seq_printf(seq, " TPTMEM: %10llu %10llu %10llu %10llu\n",
265 dev->rdev.stats.stag.total, dev->rdev.stats.stag.cur,
266 dev->rdev.stats.stag.max, dev->rdev.stats.stag.fail);
267 seq_printf(seq, " PBLMEM: %10llu %10llu %10llu %10llu\n",
268 dev->rdev.stats.pbl.total, dev->rdev.stats.pbl.cur,
269 dev->rdev.stats.pbl.max, dev->rdev.stats.pbl.fail);
270 seq_printf(seq, " RQTMEM: %10llu %10llu %10llu %10llu\n",
271 dev->rdev.stats.rqt.total, dev->rdev.stats.rqt.cur,
272 dev->rdev.stats.rqt.max, dev->rdev.stats.rqt.fail);
273 seq_printf(seq, " OCQPMEM: %10llu %10llu %10llu %10llu\n",
274 dev->rdev.stats.ocqp.total, dev->rdev.stats.ocqp.cur,
275 dev->rdev.stats.ocqp.max, dev->rdev.stats.ocqp.fail);
276 seq_printf(seq, " DB FULL: %10llu\n", dev->rdev.stats.db_full);
277 seq_printf(seq, " DB EMPTY: %10llu\n", dev->rdev.stats.db_empty);
278 seq_printf(seq, " DB DROP: %10llu\n", dev->rdev.stats.db_drop);
279 seq_printf(seq, " DB State: %s Transitions %llu\n",
280 db_state_str[dev->db_state],
281 dev->rdev.stats.db_state_transitions);
282 seq_printf(seq, "TCAM_FULL: %10llu\n", dev->rdev.stats.tcam_full);
283 seq_printf(seq, "ACT_OFLD_CONN_FAILS: %10llu\n",
284 dev->rdev.stats.act_ofld_conn_fails);
285 seq_printf(seq, "PAS_OFLD_CONN_FAILS: %10llu\n",
286 dev->rdev.stats.pas_ofld_conn_fails);
287 return 0;
288 }
289
290 static int stats_open(struct inode *inode, struct file *file)
291 {
292 return single_open(file, stats_show, inode->i_private);
293 }
294
295 static ssize_t stats_clear(struct file *file, const char __user *buf,
296 size_t count, loff_t *pos)
297 {
298 struct c4iw_dev *dev = ((struct seq_file *)file->private_data)->private;
299
300 mutex_lock(&dev->rdev.stats.lock);
301 dev->rdev.stats.pd.max = 0;
302 dev->rdev.stats.pd.fail = 0;
303 dev->rdev.stats.qid.max = 0;
304 dev->rdev.stats.qid.fail = 0;
305 dev->rdev.stats.stag.max = 0;
306 dev->rdev.stats.stag.fail = 0;
307 dev->rdev.stats.pbl.max = 0;
308 dev->rdev.stats.pbl.fail = 0;
309 dev->rdev.stats.rqt.max = 0;
310 dev->rdev.stats.rqt.fail = 0;
311 dev->rdev.stats.ocqp.max = 0;
312 dev->rdev.stats.ocqp.fail = 0;
313 dev->rdev.stats.db_full = 0;
314 dev->rdev.stats.db_empty = 0;
315 dev->rdev.stats.db_drop = 0;
316 dev->rdev.stats.db_state_transitions = 0;
317 dev->rdev.stats.tcam_full = 0;
318 dev->rdev.stats.act_ofld_conn_fails = 0;
319 dev->rdev.stats.pas_ofld_conn_fails = 0;
320 mutex_unlock(&dev->rdev.stats.lock);
321 return count;
322 }
323
324 static const struct file_operations stats_debugfs_fops = {
325 .owner = THIS_MODULE,
326 .open = stats_open,
327 .release = single_release,
328 .read = seq_read,
329 .llseek = seq_lseek,
330 .write = stats_clear,
331 };
332
333 static int dump_ep(int id, void *p, void *data)
334 {
335 struct c4iw_ep *ep = p;
336 struct c4iw_debugfs_data *epd = data;
337 int space;
338 int cc;
339
340 space = epd->bufsize - epd->pos - 1;
341 if (space == 0)
342 return 1;
343
344 cc = snprintf(epd->buf + epd->pos, space,
345 "ep %p cm_id %p qp %p state %d flags 0x%lx history 0x%lx "
346 "hwtid %d atid %d %pI4:%d <-> %pI4:%d\n",
347 ep, ep->com.cm_id, ep->com.qp, (int)ep->com.state,
348 ep->com.flags, ep->com.history, ep->hwtid, ep->atid,
349 &ep->com.local_addr.sin_addr.s_addr,
350 ntohs(ep->com.local_addr.sin_port),
351 &ep->com.remote_addr.sin_addr.s_addr,
352 ntohs(ep->com.remote_addr.sin_port));
353 if (cc < space)
354 epd->pos += cc;
355 return 0;
356 }
357
358 static int dump_listen_ep(int id, void *p, void *data)
359 {
360 struct c4iw_listen_ep *ep = p;
361 struct c4iw_debugfs_data *epd = data;
362 int space;
363 int cc;
364
365 space = epd->bufsize - epd->pos - 1;
366 if (space == 0)
367 return 1;
368
369 cc = snprintf(epd->buf + epd->pos, space,
370 "ep %p cm_id %p state %d flags 0x%lx stid %d backlog %d "
371 "%pI4:%d\n", ep, ep->com.cm_id, (int)ep->com.state,
372 ep->com.flags, ep->stid, ep->backlog,
373 &ep->com.local_addr.sin_addr.s_addr,
374 ntohs(ep->com.local_addr.sin_port));
375 if (cc < space)
376 epd->pos += cc;
377 return 0;
378 }
379
380 static int ep_release(struct inode *inode, struct file *file)
381 {
382 struct c4iw_debugfs_data *epd = file->private_data;
383 if (!epd) {
384 pr_info("%s null qpd?\n", __func__);
385 return 0;
386 }
387 vfree(epd->buf);
388 kfree(epd);
389 return 0;
390 }
391
392 static int ep_open(struct inode *inode, struct file *file)
393 {
394 struct c4iw_debugfs_data *epd;
395 int ret = 0;
396 int count = 1;
397
398 epd = kmalloc(sizeof(*epd), GFP_KERNEL);
399 if (!epd) {
400 ret = -ENOMEM;
401 goto out;
402 }
403 epd->devp = inode->i_private;
404 epd->pos = 0;
405
406 spin_lock_irq(&epd->devp->lock);
407 idr_for_each(&epd->devp->hwtid_idr, count_idrs, &count);
408 idr_for_each(&epd->devp->atid_idr, count_idrs, &count);
409 idr_for_each(&epd->devp->stid_idr, count_idrs, &count);
410 spin_unlock_irq(&epd->devp->lock);
411
412 epd->bufsize = count * 160;
413 epd->buf = vmalloc(epd->bufsize);
414 if (!epd->buf) {
415 ret = -ENOMEM;
416 goto err1;
417 }
418
419 spin_lock_irq(&epd->devp->lock);
420 idr_for_each(&epd->devp->hwtid_idr, dump_ep, epd);
421 idr_for_each(&epd->devp->atid_idr, dump_ep, epd);
422 idr_for_each(&epd->devp->stid_idr, dump_listen_ep, epd);
423 spin_unlock_irq(&epd->devp->lock);
424
425 file->private_data = epd;
426 goto out;
427 err1:
428 kfree(epd);
429 out:
430 return ret;
431 }
432
433 static const struct file_operations ep_debugfs_fops = {
434 .owner = THIS_MODULE,
435 .open = ep_open,
436 .release = ep_release,
437 .read = debugfs_read,
438 };
439
440 static int setup_debugfs(struct c4iw_dev *devp)
441 {
442 struct dentry *de;
443
444 if (!devp->debugfs_root)
445 return -1;
446
447 de = debugfs_create_file("qps", S_IWUSR, devp->debugfs_root,
448 (void *)devp, &qp_debugfs_fops);
449 if (de && de->d_inode)
450 de->d_inode->i_size = 4096;
451
452 de = debugfs_create_file("stags", S_IWUSR, devp->debugfs_root,
453 (void *)devp, &stag_debugfs_fops);
454 if (de && de->d_inode)
455 de->d_inode->i_size = 4096;
456
457 de = debugfs_create_file("stats", S_IWUSR, devp->debugfs_root,
458 (void *)devp, &stats_debugfs_fops);
459 if (de && de->d_inode)
460 de->d_inode->i_size = 4096;
461
462 de = debugfs_create_file("eps", S_IWUSR, devp->debugfs_root,
463 (void *)devp, &ep_debugfs_fops);
464 if (de && de->d_inode)
465 de->d_inode->i_size = 4096;
466
467 return 0;
468 }
469
470 void c4iw_release_dev_ucontext(struct c4iw_rdev *rdev,
471 struct c4iw_dev_ucontext *uctx)
472 {
473 struct list_head *pos, *nxt;
474 struct c4iw_qid_list *entry;
475
476 mutex_lock(&uctx->lock);
477 list_for_each_safe(pos, nxt, &uctx->qpids) {
478 entry = list_entry(pos, struct c4iw_qid_list, entry);
479 list_del_init(&entry->entry);
480 if (!(entry->qid & rdev->qpmask)) {
481 c4iw_put_resource(&rdev->resource.qid_table,
482 entry->qid);
483 mutex_lock(&rdev->stats.lock);
484 rdev->stats.qid.cur -= rdev->qpmask + 1;
485 mutex_unlock(&rdev->stats.lock);
486 }
487 kfree(entry);
488 }
489
490 list_for_each_safe(pos, nxt, &uctx->qpids) {
491 entry = list_entry(pos, struct c4iw_qid_list, entry);
492 list_del_init(&entry->entry);
493 kfree(entry);
494 }
495 mutex_unlock(&uctx->lock);
496 }
497
498 void c4iw_init_dev_ucontext(struct c4iw_rdev *rdev,
499 struct c4iw_dev_ucontext *uctx)
500 {
501 INIT_LIST_HEAD(&uctx->qpids);
502 INIT_LIST_HEAD(&uctx->cqids);
503 mutex_init(&uctx->lock);
504 }
505
506 /* Caller takes care of locking if needed */
507 static int c4iw_rdev_open(struct c4iw_rdev *rdev)
508 {
509 int err;
510
511 c4iw_init_dev_ucontext(rdev, &rdev->uctx);
512
513 /*
514 * qpshift is the number of bits to shift the qpid left in order
515 * to get the correct address of the doorbell for that qp.
516 */
517 rdev->qpshift = PAGE_SHIFT - ilog2(rdev->lldi.udb_density);
518 rdev->qpmask = rdev->lldi.udb_density - 1;
519 rdev->cqshift = PAGE_SHIFT - ilog2(rdev->lldi.ucq_density);
520 rdev->cqmask = rdev->lldi.ucq_density - 1;
521 PDBG("%s dev %s stag start 0x%0x size 0x%0x num stags %d "
522 "pbl start 0x%0x size 0x%0x rq start 0x%0x size 0x%0x "
523 "qp qid start %u size %u cq qid start %u size %u\n",
524 __func__, pci_name(rdev->lldi.pdev), rdev->lldi.vr->stag.start,
525 rdev->lldi.vr->stag.size, c4iw_num_stags(rdev),
526 rdev->lldi.vr->pbl.start,
527 rdev->lldi.vr->pbl.size, rdev->lldi.vr->rq.start,
528 rdev->lldi.vr->rq.size,
529 rdev->lldi.vr->qp.start,
530 rdev->lldi.vr->qp.size,
531 rdev->lldi.vr->cq.start,
532 rdev->lldi.vr->cq.size);
533 PDBG("udb len 0x%x udb base %p db_reg %p gts_reg %p qpshift %lu "
534 "qpmask 0x%x cqshift %lu cqmask 0x%x\n",
535 (unsigned)pci_resource_len(rdev->lldi.pdev, 2),
536 (void *)pci_resource_start(rdev->lldi.pdev, 2),
537 rdev->lldi.db_reg,
538 rdev->lldi.gts_reg,
539 rdev->qpshift, rdev->qpmask,
540 rdev->cqshift, rdev->cqmask);
541
542 if (c4iw_num_stags(rdev) == 0) {
543 err = -EINVAL;
544 goto err1;
545 }
546
547 rdev->stats.pd.total = T4_MAX_NUM_PD;
548 rdev->stats.stag.total = rdev->lldi.vr->stag.size;
549 rdev->stats.pbl.total = rdev->lldi.vr->pbl.size;
550 rdev->stats.rqt.total = rdev->lldi.vr->rq.size;
551 rdev->stats.ocqp.total = rdev->lldi.vr->ocq.size;
552 rdev->stats.qid.total = rdev->lldi.vr->qp.size;
553
554 err = c4iw_init_resource(rdev, c4iw_num_stags(rdev), T4_MAX_NUM_PD);
555 if (err) {
556 printk(KERN_ERR MOD "error %d initializing resources\n", err);
557 goto err1;
558 }
559 err = c4iw_pblpool_create(rdev);
560 if (err) {
561 printk(KERN_ERR MOD "error %d initializing pbl pool\n", err);
562 goto err2;
563 }
564 err = c4iw_rqtpool_create(rdev);
565 if (err) {
566 printk(KERN_ERR MOD "error %d initializing rqt pool\n", err);
567 goto err3;
568 }
569 err = c4iw_ocqp_pool_create(rdev);
570 if (err) {
571 printk(KERN_ERR MOD "error %d initializing ocqp pool\n", err);
572 goto err4;
573 }
574 return 0;
575 err4:
576 c4iw_rqtpool_destroy(rdev);
577 err3:
578 c4iw_pblpool_destroy(rdev);
579 err2:
580 c4iw_destroy_resource(&rdev->resource);
581 err1:
582 return err;
583 }
584
585 static void c4iw_rdev_close(struct c4iw_rdev *rdev)
586 {
587 c4iw_pblpool_destroy(rdev);
588 c4iw_rqtpool_destroy(rdev);
589 c4iw_destroy_resource(&rdev->resource);
590 }
591
592 static void c4iw_dealloc(struct uld_ctx *ctx)
593 {
594 c4iw_rdev_close(&ctx->dev->rdev);
595 idr_destroy(&ctx->dev->cqidr);
596 idr_destroy(&ctx->dev->qpidr);
597 idr_destroy(&ctx->dev->mmidr);
598 idr_destroy(&ctx->dev->hwtid_idr);
599 idr_destroy(&ctx->dev->stid_idr);
600 idr_destroy(&ctx->dev->atid_idr);
601 iounmap(ctx->dev->rdev.oc_mw_kva);
602 ib_dealloc_device(&ctx->dev->ibdev);
603 ctx->dev = NULL;
604 }
605
606 static void c4iw_remove(struct uld_ctx *ctx)
607 {
608 PDBG("%s c4iw_dev %p\n", __func__, ctx->dev);
609 c4iw_unregister_device(ctx->dev);
610 c4iw_dealloc(ctx);
611 }
612
613 static int rdma_supported(const struct cxgb4_lld_info *infop)
614 {
615 return infop->vr->stag.size > 0 && infop->vr->pbl.size > 0 &&
616 infop->vr->rq.size > 0 && infop->vr->qp.size > 0 &&
617 infop->vr->cq.size > 0 && infop->vr->ocq.size > 0;
618 }
619
620 static struct c4iw_dev *c4iw_alloc(const struct cxgb4_lld_info *infop)
621 {
622 struct c4iw_dev *devp;
623 int ret;
624
625 if (!rdma_supported(infop)) {
626 printk(KERN_INFO MOD "%s: RDMA not supported on this device.\n",
627 pci_name(infop->pdev));
628 return ERR_PTR(-ENOSYS);
629 }
630 devp = (struct c4iw_dev *)ib_alloc_device(sizeof(*devp));
631 if (!devp) {
632 printk(KERN_ERR MOD "Cannot allocate ib device\n");
633 return ERR_PTR(-ENOMEM);
634 }
635 devp->rdev.lldi = *infop;
636
637 devp->rdev.oc_mw_pa = pci_resource_start(devp->rdev.lldi.pdev, 2) +
638 (pci_resource_len(devp->rdev.lldi.pdev, 2) -
639 roundup_pow_of_two(devp->rdev.lldi.vr->ocq.size));
640 devp->rdev.oc_mw_kva = ioremap_wc(devp->rdev.oc_mw_pa,
641 devp->rdev.lldi.vr->ocq.size);
642
643 PDBG(KERN_INFO MOD "ocq memory: "
644 "hw_start 0x%x size %u mw_pa 0x%lx mw_kva %p\n",
645 devp->rdev.lldi.vr->ocq.start, devp->rdev.lldi.vr->ocq.size,
646 devp->rdev.oc_mw_pa, devp->rdev.oc_mw_kva);
647
648 ret = c4iw_rdev_open(&devp->rdev);
649 if (ret) {
650 printk(KERN_ERR MOD "Unable to open CXIO rdev err %d\n", ret);
651 ib_dealloc_device(&devp->ibdev);
652 return ERR_PTR(ret);
653 }
654
655 idr_init(&devp->cqidr);
656 idr_init(&devp->qpidr);
657 idr_init(&devp->mmidr);
658 idr_init(&devp->hwtid_idr);
659 idr_init(&devp->stid_idr);
660 idr_init(&devp->atid_idr);
661 spin_lock_init(&devp->lock);
662 mutex_init(&devp->rdev.stats.lock);
663 mutex_init(&devp->db_mutex);
664
665 if (c4iw_debugfs_root) {
666 devp->debugfs_root = debugfs_create_dir(
667 pci_name(devp->rdev.lldi.pdev),
668 c4iw_debugfs_root);
669 setup_debugfs(devp);
670 }
671 return devp;
672 }
673
674 static void *c4iw_uld_add(const struct cxgb4_lld_info *infop)
675 {
676 struct uld_ctx *ctx;
677 static int vers_printed;
678 int i;
679
680 if (!vers_printed++)
681 printk(KERN_INFO MOD "Chelsio T4 RDMA Driver - version %s\n",
682 DRV_VERSION);
683
684 ctx = kzalloc(sizeof *ctx, GFP_KERNEL);
685 if (!ctx) {
686 ctx = ERR_PTR(-ENOMEM);
687 goto out;
688 }
689 ctx->lldi = *infop;
690
691 PDBG("%s found device %s nchan %u nrxq %u ntxq %u nports %u\n",
692 __func__, pci_name(ctx->lldi.pdev),
693 ctx->lldi.nchan, ctx->lldi.nrxq,
694 ctx->lldi.ntxq, ctx->lldi.nports);
695
696 mutex_lock(&dev_mutex);
697 list_add_tail(&ctx->entry, &uld_ctx_list);
698 mutex_unlock(&dev_mutex);
699
700 for (i = 0; i < ctx->lldi.nrxq; i++)
701 PDBG("rxqid[%u] %u\n", i, ctx->lldi.rxq_ids[i]);
702 out:
703 return ctx;
704 }
705
706 static inline struct sk_buff *copy_gl_to_skb_pkt(const struct pkt_gl *gl,
707 const __be64 *rsp,
708 u32 pktshift)
709 {
710 struct sk_buff *skb;
711
712 /*
713 * Allocate space for cpl_pass_accept_req which will be synthesized by
714 * driver. Once the driver synthesizes the request the skb will go
715 * through the regular cpl_pass_accept_req processing.
716 * The math here assumes sizeof cpl_pass_accept_req >= sizeof
717 * cpl_rx_pkt.
718 */
719 skb = alloc_skb(gl->tot_len + sizeof(struct cpl_pass_accept_req) +
720 sizeof(struct rss_header) - pktshift, GFP_ATOMIC);
721 if (unlikely(!skb))
722 return NULL;
723
724 __skb_put(skb, gl->tot_len + sizeof(struct cpl_pass_accept_req) +
725 sizeof(struct rss_header) - pktshift);
726
727 /*
728 * This skb will contain:
729 * rss_header from the rspq descriptor (1 flit)
730 * cpl_rx_pkt struct from the rspq descriptor (2 flits)
731 * space for the difference between the size of an
732 * rx_pkt and pass_accept_req cpl (1 flit)
733 * the packet data from the gl
734 */
735 skb_copy_to_linear_data(skb, rsp, sizeof(struct cpl_pass_accept_req) +
736 sizeof(struct rss_header));
737 skb_copy_to_linear_data_offset(skb, sizeof(struct rss_header) +
738 sizeof(struct cpl_pass_accept_req),
739 gl->va + pktshift,
740 gl->tot_len - pktshift);
741 return skb;
742 }
743
744 static inline int recv_rx_pkt(struct c4iw_dev *dev, const struct pkt_gl *gl,
745 const __be64 *rsp)
746 {
747 unsigned int opcode = *(u8 *)rsp;
748 struct sk_buff *skb;
749
750 if (opcode != CPL_RX_PKT)
751 goto out;
752
753 skb = copy_gl_to_skb_pkt(gl , rsp, dev->rdev.lldi.sge_pktshift);
754 if (skb == NULL)
755 goto out;
756
757 if (c4iw_handlers[opcode] == NULL) {
758 pr_info("%s no handler opcode 0x%x...\n", __func__,
759 opcode);
760 kfree_skb(skb);
761 goto out;
762 }
763 c4iw_handlers[opcode](dev, skb);
764 return 1;
765 out:
766 return 0;
767 }
768
769 static int c4iw_uld_rx_handler(void *handle, const __be64 *rsp,
770 const struct pkt_gl *gl)
771 {
772 struct uld_ctx *ctx = handle;
773 struct c4iw_dev *dev = ctx->dev;
774 struct sk_buff *skb;
775 u8 opcode;
776
777 if (gl == NULL) {
778 /* omit RSS and rsp_ctrl at end of descriptor */
779 unsigned int len = 64 - sizeof(struct rsp_ctrl) - 8;
780
781 skb = alloc_skb(256, GFP_ATOMIC);
782 if (!skb)
783 goto nomem;
784 __skb_put(skb, len);
785 skb_copy_to_linear_data(skb, &rsp[1], len);
786 } else if (gl == CXGB4_MSG_AN) {
787 const struct rsp_ctrl *rc = (void *)rsp;
788
789 u32 qid = be32_to_cpu(rc->pldbuflen_qid);
790 c4iw_ev_handler(dev, qid);
791 return 0;
792 } else if (unlikely(*(u8 *)rsp != *(u8 *)gl->va)) {
793 if (recv_rx_pkt(dev, gl, rsp))
794 return 0;
795
796 pr_info("%s: unexpected FL contents at %p, " \
797 "RSS %#llx, FL %#llx, len %u\n",
798 pci_name(ctx->lldi.pdev), gl->va,
799 (unsigned long long)be64_to_cpu(*rsp),
800 (unsigned long long)be64_to_cpu(*(u64 *)gl->va),
801 gl->tot_len);
802
803 return 0;
804 } else {
805 skb = cxgb4_pktgl_to_skb(gl, 128, 128);
806 if (unlikely(!skb))
807 goto nomem;
808 }
809
810 opcode = *(u8 *)rsp;
811 if (c4iw_handlers[opcode])
812 c4iw_handlers[opcode](dev, skb);
813 else
814 pr_info("%s no handler opcode 0x%x...\n", __func__,
815 opcode);
816
817 return 0;
818 nomem:
819 return -1;
820 }
821
822 static int c4iw_uld_state_change(void *handle, enum cxgb4_state new_state)
823 {
824 struct uld_ctx *ctx = handle;
825
826 PDBG("%s new_state %u\n", __func__, new_state);
827 switch (new_state) {
828 case CXGB4_STATE_UP:
829 printk(KERN_INFO MOD "%s: Up\n", pci_name(ctx->lldi.pdev));
830 if (!ctx->dev) {
831 int ret;
832
833 ctx->dev = c4iw_alloc(&ctx->lldi);
834 if (IS_ERR(ctx->dev)) {
835 printk(KERN_ERR MOD
836 "%s: initialization failed: %ld\n",
837 pci_name(ctx->lldi.pdev),
838 PTR_ERR(ctx->dev));
839 ctx->dev = NULL;
840 break;
841 }
842 ret = c4iw_register_device(ctx->dev);
843 if (ret) {
844 printk(KERN_ERR MOD
845 "%s: RDMA registration failed: %d\n",
846 pci_name(ctx->lldi.pdev), ret);
847 c4iw_dealloc(ctx);
848 }
849 }
850 break;
851 case CXGB4_STATE_DOWN:
852 printk(KERN_INFO MOD "%s: Down\n",
853 pci_name(ctx->lldi.pdev));
854 if (ctx->dev)
855 c4iw_remove(ctx);
856 break;
857 case CXGB4_STATE_START_RECOVERY:
858 printk(KERN_INFO MOD "%s: Fatal Error\n",
859 pci_name(ctx->lldi.pdev));
860 if (ctx->dev) {
861 struct ib_event event;
862
863 ctx->dev->rdev.flags |= T4_FATAL_ERROR;
864 memset(&event, 0, sizeof event);
865 event.event = IB_EVENT_DEVICE_FATAL;
866 event.device = &ctx->dev->ibdev;
867 ib_dispatch_event(&event);
868 c4iw_remove(ctx);
869 }
870 break;
871 case CXGB4_STATE_DETACH:
872 printk(KERN_INFO MOD "%s: Detach\n",
873 pci_name(ctx->lldi.pdev));
874 if (ctx->dev)
875 c4iw_remove(ctx);
876 break;
877 }
878 return 0;
879 }
880
881 static int disable_qp_db(int id, void *p, void *data)
882 {
883 struct c4iw_qp *qp = p;
884
885 t4_disable_wq_db(&qp->wq);
886 return 0;
887 }
888
889 static void stop_queues(struct uld_ctx *ctx)
890 {
891 spin_lock_irq(&ctx->dev->lock);
892 if (ctx->dev->db_state == NORMAL) {
893 ctx->dev->rdev.stats.db_state_transitions++;
894 ctx->dev->db_state = FLOW_CONTROL;
895 idr_for_each(&ctx->dev->qpidr, disable_qp_db, NULL);
896 }
897 spin_unlock_irq(&ctx->dev->lock);
898 }
899
900 static int enable_qp_db(int id, void *p, void *data)
901 {
902 struct c4iw_qp *qp = p;
903
904 t4_enable_wq_db(&qp->wq);
905 return 0;
906 }
907
908 static void resume_queues(struct uld_ctx *ctx)
909 {
910 spin_lock_irq(&ctx->dev->lock);
911 if (ctx->dev->qpcnt <= db_fc_threshold &&
912 ctx->dev->db_state == FLOW_CONTROL) {
913 ctx->dev->db_state = NORMAL;
914 ctx->dev->rdev.stats.db_state_transitions++;
915 idr_for_each(&ctx->dev->qpidr, enable_qp_db, NULL);
916 }
917 spin_unlock_irq(&ctx->dev->lock);
918 }
919
920 struct qp_list {
921 unsigned idx;
922 struct c4iw_qp **qps;
923 };
924
925 static int add_and_ref_qp(int id, void *p, void *data)
926 {
927 struct qp_list *qp_listp = data;
928 struct c4iw_qp *qp = p;
929
930 c4iw_qp_add_ref(&qp->ibqp);
931 qp_listp->qps[qp_listp->idx++] = qp;
932 return 0;
933 }
934
935 static int count_qps(int id, void *p, void *data)
936 {
937 unsigned *countp = data;
938 (*countp)++;
939 return 0;
940 }
941
942 static void deref_qps(struct qp_list qp_list)
943 {
944 int idx;
945
946 for (idx = 0; idx < qp_list.idx; idx++)
947 c4iw_qp_rem_ref(&qp_list.qps[idx]->ibqp);
948 }
949
950 static void recover_lost_dbs(struct uld_ctx *ctx, struct qp_list *qp_list)
951 {
952 int idx;
953 int ret;
954
955 for (idx = 0; idx < qp_list->idx; idx++) {
956 struct c4iw_qp *qp = qp_list->qps[idx];
957
958 ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0],
959 qp->wq.sq.qid,
960 t4_sq_host_wq_pidx(&qp->wq),
961 t4_sq_wq_size(&qp->wq));
962 if (ret) {
963 printk(KERN_ERR MOD "%s: Fatal error - "
964 "DB overflow recovery failed - "
965 "error syncing SQ qid %u\n",
966 pci_name(ctx->lldi.pdev), qp->wq.sq.qid);
967 return;
968 }
969
970 ret = cxgb4_sync_txq_pidx(qp->rhp->rdev.lldi.ports[0],
971 qp->wq.rq.qid,
972 t4_rq_host_wq_pidx(&qp->wq),
973 t4_rq_wq_size(&qp->wq));
974
975 if (ret) {
976 printk(KERN_ERR MOD "%s: Fatal error - "
977 "DB overflow recovery failed - "
978 "error syncing RQ qid %u\n",
979 pci_name(ctx->lldi.pdev), qp->wq.rq.qid);
980 return;
981 }
982
983 /* Wait for the dbfifo to drain */
984 while (cxgb4_dbfifo_count(qp->rhp->rdev.lldi.ports[0], 1) > 0) {
985 set_current_state(TASK_UNINTERRUPTIBLE);
986 schedule_timeout(usecs_to_jiffies(10));
987 }
988 }
989 }
990
991 static void recover_queues(struct uld_ctx *ctx)
992 {
993 int count = 0;
994 struct qp_list qp_list;
995 int ret;
996
997 /* lock out kernel db ringers */
998 mutex_lock(&ctx->dev->db_mutex);
999
1000 /* put all queues in to recovery mode */
1001 spin_lock_irq(&ctx->dev->lock);
1002 ctx->dev->db_state = RECOVERY;
1003 ctx->dev->rdev.stats.db_state_transitions++;
1004 idr_for_each(&ctx->dev->qpidr, disable_qp_db, NULL);
1005 spin_unlock_irq(&ctx->dev->lock);
1006
1007 /* slow everybody down */
1008 set_current_state(TASK_UNINTERRUPTIBLE);
1009 schedule_timeout(usecs_to_jiffies(1000));
1010
1011 /* Wait for the dbfifo to completely drain. */
1012 while (cxgb4_dbfifo_count(ctx->dev->rdev.lldi.ports[0], 1) > 0) {
1013 set_current_state(TASK_UNINTERRUPTIBLE);
1014 schedule_timeout(usecs_to_jiffies(10));
1015 }
1016
1017 /* flush the SGE contexts */
1018 ret = cxgb4_flush_eq_cache(ctx->dev->rdev.lldi.ports[0]);
1019 if (ret) {
1020 printk(KERN_ERR MOD "%s: Fatal error - DB overflow recovery failed\n",
1021 pci_name(ctx->lldi.pdev));
1022 goto out;
1023 }
1024
1025 /* Count active queues so we can build a list of queues to recover */
1026 spin_lock_irq(&ctx->dev->lock);
1027 idr_for_each(&ctx->dev->qpidr, count_qps, &count);
1028
1029 qp_list.qps = kzalloc(count * sizeof *qp_list.qps, GFP_ATOMIC);
1030 if (!qp_list.qps) {
1031 printk(KERN_ERR MOD "%s: Fatal error - DB overflow recovery failed\n",
1032 pci_name(ctx->lldi.pdev));
1033 spin_unlock_irq(&ctx->dev->lock);
1034 goto out;
1035 }
1036 qp_list.idx = 0;
1037
1038 /* add and ref each qp so it doesn't get freed */
1039 idr_for_each(&ctx->dev->qpidr, add_and_ref_qp, &qp_list);
1040
1041 spin_unlock_irq(&ctx->dev->lock);
1042
1043 /* now traverse the list in a safe context to recover the db state*/
1044 recover_lost_dbs(ctx, &qp_list);
1045
1046 /* we're almost done! deref the qps and clean up */
1047 deref_qps(qp_list);
1048 kfree(qp_list.qps);
1049
1050 /* Wait for the dbfifo to completely drain again */
1051 while (cxgb4_dbfifo_count(ctx->dev->rdev.lldi.ports[0], 1) > 0) {
1052 set_current_state(TASK_UNINTERRUPTIBLE);
1053 schedule_timeout(usecs_to_jiffies(10));
1054 }
1055
1056 /* resume the queues */
1057 spin_lock_irq(&ctx->dev->lock);
1058 if (ctx->dev->qpcnt > db_fc_threshold)
1059 ctx->dev->db_state = FLOW_CONTROL;
1060 else {
1061 ctx->dev->db_state = NORMAL;
1062 idr_for_each(&ctx->dev->qpidr, enable_qp_db, NULL);
1063 }
1064 ctx->dev->rdev.stats.db_state_transitions++;
1065 spin_unlock_irq(&ctx->dev->lock);
1066
1067 out:
1068 /* start up kernel db ringers again */
1069 mutex_unlock(&ctx->dev->db_mutex);
1070 }
1071
1072 static int c4iw_uld_control(void *handle, enum cxgb4_control control, ...)
1073 {
1074 struct uld_ctx *ctx = handle;
1075
1076 switch (control) {
1077 case CXGB4_CONTROL_DB_FULL:
1078 stop_queues(ctx);
1079 mutex_lock(&ctx->dev->rdev.stats.lock);
1080 ctx->dev->rdev.stats.db_full++;
1081 mutex_unlock(&ctx->dev->rdev.stats.lock);
1082 break;
1083 case CXGB4_CONTROL_DB_EMPTY:
1084 resume_queues(ctx);
1085 mutex_lock(&ctx->dev->rdev.stats.lock);
1086 ctx->dev->rdev.stats.db_empty++;
1087 mutex_unlock(&ctx->dev->rdev.stats.lock);
1088 break;
1089 case CXGB4_CONTROL_DB_DROP:
1090 recover_queues(ctx);
1091 mutex_lock(&ctx->dev->rdev.stats.lock);
1092 ctx->dev->rdev.stats.db_drop++;
1093 mutex_unlock(&ctx->dev->rdev.stats.lock);
1094 break;
1095 default:
1096 printk(KERN_WARNING MOD "%s: unknown control cmd %u\n",
1097 pci_name(ctx->lldi.pdev), control);
1098 break;
1099 }
1100 return 0;
1101 }
1102
1103 static struct cxgb4_uld_info c4iw_uld_info = {
1104 .name = DRV_NAME,
1105 .add = c4iw_uld_add,
1106 .rx_handler = c4iw_uld_rx_handler,
1107 .state_change = c4iw_uld_state_change,
1108 .control = c4iw_uld_control,
1109 };
1110
1111 static int __init c4iw_init_module(void)
1112 {
1113 int err;
1114
1115 err = c4iw_cm_init();
1116 if (err)
1117 return err;
1118
1119 c4iw_debugfs_root = debugfs_create_dir(DRV_NAME, NULL);
1120 if (!c4iw_debugfs_root)
1121 printk(KERN_WARNING MOD
1122 "could not create debugfs entry, continuing\n");
1123
1124 cxgb4_register_uld(CXGB4_ULD_RDMA, &c4iw_uld_info);
1125
1126 return 0;
1127 }
1128
1129 static void __exit c4iw_exit_module(void)
1130 {
1131 struct uld_ctx *ctx, *tmp;
1132
1133 mutex_lock(&dev_mutex);
1134 list_for_each_entry_safe(ctx, tmp, &uld_ctx_list, entry) {
1135 if (ctx->dev)
1136 c4iw_remove(ctx);
1137 kfree(ctx);
1138 }
1139 mutex_unlock(&dev_mutex);
1140 cxgb4_unregister_uld(CXGB4_ULD_RDMA);
1141 c4iw_cm_term();
1142 debugfs_remove_recursive(c4iw_debugfs_root);
1143 }
1144
1145 module_init(c4iw_init_module);
1146 module_exit(c4iw_exit_module);
Linux with added FPC-III support