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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / net / ethernet / brocade / bna / bnad_debugfs.c
blob7d6aa8c87df84747bea056019a89517846817b21
1 /*
2 * Linux network driver for Brocade Converged Network Adapter.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License (GPL) Version 2 as
6 * published by the Free Software Foundation
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 */
13 /*
14 * Copyright (c) 2005-2011 Brocade Communications Systems, Inc.
15 * All rights reserved
16 * www.brocade.com
17 */
18
19 #include <linux/debugfs.h>
20 #include <linux/module.h>
21 #include "bnad.h"
22
23 /*
24 * BNA debufs interface
25 *
26 * To access the interface, debugfs file system should be mounted
27 * if not already mounted using:
28 * mount -t debugfs none /sys/kernel/debug
29 *
30 * BNA Hierarchy:
31 * - bna/pci_dev:<pci_name>
32 * where the pci_name corresponds to the one under /sys/bus/pci/drivers/bna
33 *
34 * Debugging service available per pci_dev:
35 * fwtrc: To collect current firmware trace.
36 * fwsave: To collect last saved fw trace as a result of firmware crash.
37 * regwr: To write one word to chip register
38 * regrd: To read one or more words from chip register.
39 */
40
41 struct bnad_debug_info {
42 char *debug_buffer;
43 void *i_private;
44 int buffer_len;
45 };
46
47 static int
48 bnad_debugfs_open_fwtrc(struct inode *inode, struct file *file)
49 {
50 struct bnad *bnad = inode->i_private;
51 struct bnad_debug_info *fw_debug;
52 unsigned long flags;
53 int rc;
54
55 fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
56 if (!fw_debug)
57 return -ENOMEM;
58
59 fw_debug->buffer_len = BNA_DBG_FWTRC_LEN;
60
61 fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL);
62 if (!fw_debug->debug_buffer) {
63 kfree(fw_debug);
64 fw_debug = NULL;
65 return -ENOMEM;
66 }
67
68 spin_lock_irqsave(&bnad->bna_lock, flags);
69 rc = bfa_nw_ioc_debug_fwtrc(&bnad->bna.ioceth.ioc,
70 fw_debug->debug_buffer,
71 &fw_debug->buffer_len);
72 spin_unlock_irqrestore(&bnad->bna_lock, flags);
73 if (rc != BFA_STATUS_OK) {
74 kfree(fw_debug->debug_buffer);
75 fw_debug->debug_buffer = NULL;
76 kfree(fw_debug);
77 fw_debug = NULL;
78 pr_warn("bnad %s: Failed to collect fwtrc\n",
79 pci_name(bnad->pcidev));
80 return -ENOMEM;
81 }
82
83 file->private_data = fw_debug;
84
85 return 0;
86 }
87
88 static int
89 bnad_debugfs_open_fwsave(struct inode *inode, struct file *file)
90 {
91 struct bnad *bnad = inode->i_private;
92 struct bnad_debug_info *fw_debug;
93 unsigned long flags;
94 int rc;
95
96 fw_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
97 if (!fw_debug)
98 return -ENOMEM;
99
100 fw_debug->buffer_len = BNA_DBG_FWTRC_LEN;
101
102 fw_debug->debug_buffer = kzalloc(fw_debug->buffer_len, GFP_KERNEL);
103 if (!fw_debug->debug_buffer) {
104 kfree(fw_debug);
105 fw_debug = NULL;
106 return -ENOMEM;
107 }
108
109 spin_lock_irqsave(&bnad->bna_lock, flags);
110 rc = bfa_nw_ioc_debug_fwsave(&bnad->bna.ioceth.ioc,
111 fw_debug->debug_buffer,
112 &fw_debug->buffer_len);
113 spin_unlock_irqrestore(&bnad->bna_lock, flags);
114 if (rc != BFA_STATUS_OK && rc != BFA_STATUS_ENOFSAVE) {
115 kfree(fw_debug->debug_buffer);
116 fw_debug->debug_buffer = NULL;
117 kfree(fw_debug);
118 fw_debug = NULL;
119 pr_warn("bna %s: Failed to collect fwsave\n",
120 pci_name(bnad->pcidev));
121 return -ENOMEM;
122 }
123
124 file->private_data = fw_debug;
125
126 return 0;
127 }
128
129 static int
130 bnad_debugfs_open_reg(struct inode *inode, struct file *file)
131 {
132 struct bnad_debug_info *reg_debug;
133
134 reg_debug = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
135 if (!reg_debug)
136 return -ENOMEM;
137
138 reg_debug->i_private = inode->i_private;
139
140 file->private_data = reg_debug;
141
142 return 0;
143 }
144
145 static int
146 bnad_get_debug_drvinfo(struct bnad *bnad, void *buffer, u32 len)
147 {
148 struct bnad_drvinfo *drvinfo = (struct bnad_drvinfo *) buffer;
149 struct bnad_iocmd_comp fcomp;
150 unsigned long flags = 0;
151 int ret = BFA_STATUS_FAILED;
152
153 /* Get IOC info */
154 spin_lock_irqsave(&bnad->bna_lock, flags);
155 bfa_nw_ioc_get_attr(&bnad->bna.ioceth.ioc, &drvinfo->ioc_attr);
156 spin_unlock_irqrestore(&bnad->bna_lock, flags);
157
158 /* Retrieve CEE related info */
159 fcomp.bnad = bnad;
160 fcomp.comp_status = 0;
161 init_completion(&fcomp.comp);
162 spin_lock_irqsave(&bnad->bna_lock, flags);
163 ret = bfa_nw_cee_get_attr(&bnad->bna.cee, &drvinfo->cee_attr,
164 bnad_cb_completion, &fcomp);
165 if (ret != BFA_STATUS_OK) {
166 spin_unlock_irqrestore(&bnad->bna_lock, flags);
167 goto out;
168 }
169 spin_unlock_irqrestore(&bnad->bna_lock, flags);
170 wait_for_completion(&fcomp.comp);
171 drvinfo->cee_status = fcomp.comp_status;
172
173 /* Retrieve flash partition info */
174 fcomp.comp_status = 0;
175 init_completion(&fcomp.comp);
176 spin_lock_irqsave(&bnad->bna_lock, flags);
177 ret = bfa_nw_flash_get_attr(&bnad->bna.flash, &drvinfo->flash_attr,
178 bnad_cb_completion, &fcomp);
179 if (ret != BFA_STATUS_OK) {
180 spin_unlock_irqrestore(&bnad->bna_lock, flags);
181 goto out;
182 }
183 spin_unlock_irqrestore(&bnad->bna_lock, flags);
184 wait_for_completion(&fcomp.comp);
185 drvinfo->flash_status = fcomp.comp_status;
186 out:
187 return ret;
188 }
189
190 static int
191 bnad_debugfs_open_drvinfo(struct inode *inode, struct file *file)
192 {
193 struct bnad *bnad = inode->i_private;
194 struct bnad_debug_info *drv_info;
195 int rc;
196
197 drv_info = kzalloc(sizeof(struct bnad_debug_info), GFP_KERNEL);
198 if (!drv_info)
199 return -ENOMEM;
200
201 drv_info->buffer_len = sizeof(struct bnad_drvinfo);
202
203 drv_info->debug_buffer = kzalloc(drv_info->buffer_len, GFP_KERNEL);
204 if (!drv_info->debug_buffer) {
205 kfree(drv_info);
206 drv_info = NULL;
207 return -ENOMEM;
208 }
209
210 mutex_lock(&bnad->conf_mutex);
211 rc = bnad_get_debug_drvinfo(bnad, drv_info->debug_buffer,
212 drv_info->buffer_len);
213 mutex_unlock(&bnad->conf_mutex);
214 if (rc != BFA_STATUS_OK) {
215 kfree(drv_info->debug_buffer);
216 drv_info->debug_buffer = NULL;
217 kfree(drv_info);
218 drv_info = NULL;
219 pr_warn("bna %s: Failed to collect drvinfo\n",
220 pci_name(bnad->pcidev));
221 return -ENOMEM;
222 }
223
224 file->private_data = drv_info;
225
226 return 0;
227 }
228
229 /* Changes the current file position */
230 static loff_t
231 bnad_debugfs_lseek(struct file *file, loff_t offset, int orig)
232 {
233 struct bnad_debug_info *debug = file->private_data;
234
235 if (!debug)
236 return -EINVAL;
237
238 return fixed_size_llseek(file, offset, orig, debug->buffer_len);
239 }
240
241 static ssize_t
242 bnad_debugfs_read(struct file *file, char __user *buf,
243 size_t nbytes, loff_t *pos)
244 {
245 struct bnad_debug_info *debug = file->private_data;
246
247 if (!debug || !debug->debug_buffer)
248 return 0;
249
250 return simple_read_from_buffer(buf, nbytes, pos,
251 debug->debug_buffer, debug->buffer_len);
252 }
253
254 #define BFA_REG_CT_ADDRSZ (0x40000)
255 #define BFA_REG_CB_ADDRSZ (0x20000)
256 #define BFA_REG_ADDRSZ(__ioc) \
257 ((u32)(bfa_asic_id_ctc(bfa_ioc_devid(__ioc)) ? \
258 BFA_REG_CT_ADDRSZ : BFA_REG_CB_ADDRSZ))
259 #define BFA_REG_ADDRMSK(__ioc) (BFA_REG_ADDRSZ(__ioc) - 1)
260
261 /*
262 * Function to check if the register offset passed is valid.
263 */
264 static int
265 bna_reg_offset_check(struct bfa_ioc *ioc, u32 offset, u32 len)
266 {
267 u8 area;
268
269 /* check [16:15] */
270 area = (offset >> 15) & 0x7;
271 if (area == 0) {
272 /* PCIe core register */
273 if ((offset + (len<<2)) > 0x8000) /* 8k dwords or 32KB */
274 return BFA_STATUS_EINVAL;
275 } else if (area == 0x1) {
276 /* CB 32 KB memory page */
277 if ((offset + (len<<2)) > 0x10000) /* 8k dwords or 32KB */
278 return BFA_STATUS_EINVAL;
279 } else {
280 /* CB register space 64KB */
281 if ((offset + (len<<2)) > BFA_REG_ADDRMSK(ioc))
282 return BFA_STATUS_EINVAL;
283 }
284 return BFA_STATUS_OK;
285 }
286
287 static ssize_t
288 bnad_debugfs_read_regrd(struct file *file, char __user *buf,
289 size_t nbytes, loff_t *pos)
290 {
291 struct bnad_debug_info *regrd_debug = file->private_data;
292 struct bnad *bnad = (struct bnad *)regrd_debug->i_private;
293 ssize_t rc;
294
295 if (!bnad->regdata)
296 return 0;
297
298 rc = simple_read_from_buffer(buf, nbytes, pos,
299 bnad->regdata, bnad->reglen);
300
301 if ((*pos + nbytes) >= bnad->reglen) {
302 kfree(bnad->regdata);
303 bnad->regdata = NULL;
304 bnad->reglen = 0;
305 }
306
307 return rc;
308 }
309
310 static ssize_t
311 bnad_debugfs_write_regrd(struct file *file, const char __user *buf,
312 size_t nbytes, loff_t *ppos)
313 {
314 struct bnad_debug_info *regrd_debug = file->private_data;
315 struct bnad *bnad = (struct bnad *)regrd_debug->i_private;
316 struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc;
317 int addr, len, rc, i;
318 u32 *regbuf;
319 void __iomem *rb, *reg_addr;
320 unsigned long flags;
321 void *kern_buf;
322
323 /* Allocate memory to store the user space buf */
324 kern_buf = kzalloc(nbytes, GFP_KERNEL);
325 if (!kern_buf)
326 return -ENOMEM;
327
328 if (copy_from_user(kern_buf, (void __user *)buf, nbytes)) {
329 kfree(kern_buf);
330 return -ENOMEM;
331 }
332
333 rc = sscanf(kern_buf, "%x:%x", &addr, &len);
334 if (rc < 2) {
335 pr_warn("bna %s: Failed to read user buffer\n",
336 pci_name(bnad->pcidev));
337 kfree(kern_buf);
338 return -EINVAL;
339 }
340
341 kfree(kern_buf);
342 kfree(bnad->regdata);
343 bnad->regdata = NULL;
344 bnad->reglen = 0;
345
346 bnad->regdata = kzalloc(len << 2, GFP_KERNEL);
347 if (!bnad->regdata)
348 return -ENOMEM;
349
350 bnad->reglen = len << 2;
351 rb = bfa_ioc_bar0(ioc);
352 addr &= BFA_REG_ADDRMSK(ioc);
353
354 /* offset and len sanity check */
355 rc = bna_reg_offset_check(ioc, addr, len);
356 if (rc) {
357 pr_warn("bna %s: Failed reg offset check\n",
358 pci_name(bnad->pcidev));
359 kfree(bnad->regdata);
360 bnad->regdata = NULL;
361 bnad->reglen = 0;
362 return -EINVAL;
363 }
364
365 reg_addr = rb + addr;
366 regbuf = (u32 *)bnad->regdata;
367 spin_lock_irqsave(&bnad->bna_lock, flags);
368 for (i = 0; i < len; i++) {
369 *regbuf = readl(reg_addr);
370 regbuf++;
371 reg_addr += sizeof(u32);
372 }
373 spin_unlock_irqrestore(&bnad->bna_lock, flags);
374
375 return nbytes;
376 }
377
378 static ssize_t
379 bnad_debugfs_write_regwr(struct file *file, const char __user *buf,
380 size_t nbytes, loff_t *ppos)
381 {
382 struct bnad_debug_info *debug = file->private_data;
383 struct bnad *bnad = (struct bnad *)debug->i_private;
384 struct bfa_ioc *ioc = &bnad->bna.ioceth.ioc;
385 int addr, val, rc;
386 void __iomem *reg_addr;
387 unsigned long flags;
388 void *kern_buf;
389
390 /* Allocate memory to store the user space buf */
391 kern_buf = kzalloc(nbytes, GFP_KERNEL);
392 if (!kern_buf)
393 return -ENOMEM;
394
395 if (copy_from_user(kern_buf, (void __user *)buf, nbytes)) {
396 kfree(kern_buf);
397 return -ENOMEM;
398 }
399
400 rc = sscanf(kern_buf, "%x:%x", &addr, &val);
401 if (rc < 2) {
402 pr_warn("bna %s: Failed to read user buffer\n",
403 pci_name(bnad->pcidev));
404 kfree(kern_buf);
405 return -EINVAL;
406 }
407 kfree(kern_buf);
408
409 addr &= BFA_REG_ADDRMSK(ioc); /* offset only 17 bit and word align */
410
411 /* offset and len sanity check */
412 rc = bna_reg_offset_check(ioc, addr, 1);
413 if (rc) {
414 pr_warn("bna %s: Failed reg offset check\n",
415 pci_name(bnad->pcidev));
416 return -EINVAL;
417 }
418
419 reg_addr = (bfa_ioc_bar0(ioc)) + addr;
420 spin_lock_irqsave(&bnad->bna_lock, flags);
421 writel(val, reg_addr);
422 spin_unlock_irqrestore(&bnad->bna_lock, flags);
423
424 return nbytes;
425 }
426
427 static int
428 bnad_debugfs_release(struct inode *inode, struct file *file)
429 {
430 struct bnad_debug_info *debug = file->private_data;
431
432 if (!debug)
433 return 0;
434
435 file->private_data = NULL;
436 kfree(debug);
437 return 0;
438 }
439
440 static int
441 bnad_debugfs_buffer_release(struct inode *inode, struct file *file)
442 {
443 struct bnad_debug_info *debug = file->private_data;
444
445 if (!debug)
446 return 0;
447
448 kfree(debug->debug_buffer);
449
450 file->private_data = NULL;
451 kfree(debug);
452 debug = NULL;
453 return 0;
454 }
455
456 static const struct file_operations bnad_debugfs_op_fwtrc = {
457 .owner = THIS_MODULE,
458 .open = bnad_debugfs_open_fwtrc,
459 .llseek = bnad_debugfs_lseek,
460 .read = bnad_debugfs_read,
461 .release = bnad_debugfs_buffer_release,
462 };
463
464 static const struct file_operations bnad_debugfs_op_fwsave = {
465 .owner = THIS_MODULE,
466 .open = bnad_debugfs_open_fwsave,
467 .llseek = bnad_debugfs_lseek,
468 .read = bnad_debugfs_read,
469 .release = bnad_debugfs_buffer_release,
470 };
471
472 static const struct file_operations bnad_debugfs_op_regrd = {
473 .owner = THIS_MODULE,
474 .open = bnad_debugfs_open_reg,
475 .llseek = bnad_debugfs_lseek,
476 .read = bnad_debugfs_read_regrd,
477 .write = bnad_debugfs_write_regrd,
478 .release = bnad_debugfs_release,
479 };
480
481 static const struct file_operations bnad_debugfs_op_regwr = {
482 .owner = THIS_MODULE,
483 .open = bnad_debugfs_open_reg,
484 .llseek = bnad_debugfs_lseek,
485 .write = bnad_debugfs_write_regwr,
486 .release = bnad_debugfs_release,
487 };
488
489 static const struct file_operations bnad_debugfs_op_drvinfo = {
490 .owner = THIS_MODULE,
491 .open = bnad_debugfs_open_drvinfo,
492 .llseek = bnad_debugfs_lseek,
493 .read = bnad_debugfs_read,
494 .release = bnad_debugfs_buffer_release,
495 };
496
497 struct bnad_debugfs_entry {
498 const char *name;
499 umode_t mode;
500 const struct file_operations *fops;
501 };
502
503 static const struct bnad_debugfs_entry bnad_debugfs_files[] = {
504 { "fwtrc", S_IFREG|S_IRUGO, &bnad_debugfs_op_fwtrc, },
505 { "fwsave", S_IFREG|S_IRUGO, &bnad_debugfs_op_fwsave, },
506 { "regrd", S_IFREG|S_IRUGO|S_IWUSR, &bnad_debugfs_op_regrd, },
507 { "regwr", S_IFREG|S_IWUSR, &bnad_debugfs_op_regwr, },
508 { "drvinfo", S_IFREG|S_IRUGO, &bnad_debugfs_op_drvinfo, },
509 };
510
511 static struct dentry *bna_debugfs_root;
512 static atomic_t bna_debugfs_port_count;
513
514 /* Initialize debugfs interface for BNA */
515 void
516 bnad_debugfs_init(struct bnad *bnad)
517 {
518 const struct bnad_debugfs_entry *file;
519 char name[64];
520 int i;
521
522 /* Setup the BNA debugfs root directory*/
523 if (!bna_debugfs_root) {
524 bna_debugfs_root = debugfs_create_dir("bna", NULL);
525 atomic_set(&bna_debugfs_port_count, 0);
526 if (!bna_debugfs_root) {
527 pr_warn("BNA: debugfs root dir creation failed\n");
528 return;
529 }
530 }
531
532 /* Setup the pci_dev debugfs directory for the port */
533 snprintf(name, sizeof(name), "pci_dev:%s", pci_name(bnad->pcidev));
534 if (!bnad->port_debugfs_root) {
535 bnad->port_debugfs_root =
536 debugfs_create_dir(name, bna_debugfs_root);
537 if (!bnad->port_debugfs_root) {
538 pr_warn("bna pci_dev %s: root dir creation failed\n",
539 pci_name(bnad->pcidev));
540 return;
541 }
542
543 atomic_inc(&bna_debugfs_port_count);
544
545 for (i = 0; i < ARRAY_SIZE(bnad_debugfs_files); i++) {
546 file = &bnad_debugfs_files[i];
547 bnad->bnad_dentry_files[i] =
548 debugfs_create_file(file->name,
549 file->mode,
550 bnad->port_debugfs_root,
551 bnad,
552 file->fops);
553 if (!bnad->bnad_dentry_files[i]) {
554 pr_warn(
555 "BNA pci_dev:%s: create %s entry failed\n",
556 pci_name(bnad->pcidev), file->name);
557 return;
558 }
559 }
560 }
561 }
562
563 /* Uninitialize debugfs interface for BNA */
564 void
565 bnad_debugfs_uninit(struct bnad *bnad)
566 {
567 int i;
568
569 for (i = 0; i < ARRAY_SIZE(bnad_debugfs_files); i++) {
570 if (bnad->bnad_dentry_files[i]) {
571 debugfs_remove(bnad->bnad_dentry_files[i]);
572 bnad->bnad_dentry_files[i] = NULL;
573 }
574 }
575
576 /* Remove the pci_dev debugfs directory for the port */
577 if (bnad->port_debugfs_root) {
578 debugfs_remove(bnad->port_debugfs_root);
579 bnad->port_debugfs_root = NULL;
580 atomic_dec(&bna_debugfs_port_count);
581 }
582
583 /* Remove the BNA debugfs root directory */
584 if (atomic_read(&bna_debugfs_port_count) == 0) {
585 debugfs_remove(bna_debugfs_root);
586 bna_debugfs_root = NULL;
587 }
588 }
Linux with added FPC-III support