Commit | Line | Data |
---|---|---|
ab2a9ba1 | 1 | /* |
889d0d42 AG |
2 | * Copyright (c) 2005-2014 Brocade Communications Systems, Inc. |
3 | * Copyright (c) 2014- QLogic Corporation. | |
ab2a9ba1 | 4 | * All rights reserved |
889d0d42 | 5 | * www.qlogic.com |
ab2a9ba1 | 6 | * |
31e1d569 | 7 | * Linux driver for QLogic BR-series Fibre Channel Host Bus Adapter. |
ab2a9ba1 JH |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License (GPL) Version 2 as | |
11 | * published by the Free Software Foundation | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but | |
14 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | */ | |
18 | ||
19 | #include <linux/debugfs.h> | |
09703660 | 20 | #include <linux/export.h> |
ab2a9ba1 | 21 | |
a36c61f9 KG |
22 | #include "bfad_drv.h" |
23 | #include "bfad_im.h" | |
ab2a9ba1 JH |
24 | |
25 | /* | |
26 | * BFA debufs interface | |
27 | * | |
28 | * To access the interface, debugfs file system should be mounted | |
29 | * if not already mounted using: | |
30 | * mount -t debugfs none /sys/kernel/debug | |
31 | * | |
32 | * BFA Hierarchy: | |
7c38c05b KG |
33 | * - bfa/pci_dev:<pci_name> |
34 | * where the pci_name corresponds to the one under /sys/bus/pci/drivers/bfa | |
ab2a9ba1 | 35 | * |
7c38c05b | 36 | * Debugging service available per pci_dev: |
ab2a9ba1 JH |
37 | * fwtrc: To collect current firmware trace. |
38 | * drvtrc: To collect current driver trace | |
39 | * fwsave: To collect last saved fw trace as a result of firmware crash. | |
40 | * regwr: To write one word to chip register | |
41 | * regrd: To read one or more words from chip register. | |
42 | */ | |
43 | ||
44 | struct bfad_debug_info { | |
45 | char *debug_buffer; | |
46 | void *i_private; | |
47 | int buffer_len; | |
48 | }; | |
49 | ||
50 | static int | |
51 | bfad_debugfs_open_drvtrc(struct inode *inode, struct file *file) | |
52 | { | |
53 | struct bfad_port_s *port = inode->i_private; | |
54 | struct bfad_s *bfad = port->bfad; | |
55 | struct bfad_debug_info *debug; | |
56 | ||
57 | debug = kzalloc(sizeof(struct bfad_debug_info), GFP_KERNEL); | |
58 | if (!debug) | |
59 | return -ENOMEM; | |
60 | ||
61 | debug->debug_buffer = (void *) bfad->trcmod; | |
62 | debug->buffer_len = sizeof(struct bfa_trc_mod_s); | |
63 | ||
64 | file->private_data = debug; | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
69 | static int | |
70 | bfad_debugfs_open_fwtrc(struct inode *inode, struct file *file) | |
71 | { | |
72 | struct bfad_port_s *port = inode->i_private; | |
73 | struct bfad_s *bfad = port->bfad; | |
74 | struct bfad_debug_info *fw_debug; | |
75 | unsigned long flags; | |
76 | int rc; | |
77 | ||
78 | fw_debug = kzalloc(sizeof(struct bfad_debug_info), GFP_KERNEL); | |
79 | if (!fw_debug) | |
80 | return -ENOMEM; | |
81 | ||
82 | fw_debug->buffer_len = sizeof(struct bfa_trc_mod_s); | |
83 | ||
84 | fw_debug->debug_buffer = vmalloc(fw_debug->buffer_len); | |
85 | if (!fw_debug->debug_buffer) { | |
86 | kfree(fw_debug); | |
87 | printk(KERN_INFO "bfad[%d]: Failed to allocate fwtrc buffer\n", | |
88 | bfad->inst_no); | |
89 | return -ENOMEM; | |
90 | } | |
91 | ||
92 | memset(fw_debug->debug_buffer, 0, fw_debug->buffer_len); | |
93 | ||
94 | spin_lock_irqsave(&bfad->bfad_lock, flags); | |
f7f73812 | 95 | rc = bfa_ioc_debug_fwtrc(&bfad->bfa.ioc, |
ab2a9ba1 JH |
96 | fw_debug->debug_buffer, |
97 | &fw_debug->buffer_len); | |
98 | spin_unlock_irqrestore(&bfad->bfad_lock, flags); | |
99 | if (rc != BFA_STATUS_OK) { | |
100 | vfree(fw_debug->debug_buffer); | |
101 | fw_debug->debug_buffer = NULL; | |
102 | kfree(fw_debug); | |
103 | printk(KERN_INFO "bfad[%d]: Failed to collect fwtrc\n", | |
104 | bfad->inst_no); | |
105 | return -ENOMEM; | |
106 | } | |
107 | ||
108 | file->private_data = fw_debug; | |
109 | ||
110 | return 0; | |
111 | } | |
112 | ||
113 | static int | |
114 | bfad_debugfs_open_fwsave(struct inode *inode, struct file *file) | |
115 | { | |
116 | struct bfad_port_s *port = inode->i_private; | |
117 | struct bfad_s *bfad = port->bfad; | |
118 | struct bfad_debug_info *fw_debug; | |
119 | unsigned long flags; | |
120 | int rc; | |
121 | ||
122 | fw_debug = kzalloc(sizeof(struct bfad_debug_info), GFP_KERNEL); | |
123 | if (!fw_debug) | |
124 | return -ENOMEM; | |
125 | ||
126 | fw_debug->buffer_len = sizeof(struct bfa_trc_mod_s); | |
127 | ||
128 | fw_debug->debug_buffer = vmalloc(fw_debug->buffer_len); | |
129 | if (!fw_debug->debug_buffer) { | |
130 | kfree(fw_debug); | |
131 | printk(KERN_INFO "bfad[%d]: Failed to allocate fwsave buffer\n", | |
132 | bfad->inst_no); | |
133 | return -ENOMEM; | |
134 | } | |
135 | ||
136 | memset(fw_debug->debug_buffer, 0, fw_debug->buffer_len); | |
137 | ||
138 | spin_lock_irqsave(&bfad->bfad_lock, flags); | |
f7f73812 | 139 | rc = bfa_ioc_debug_fwsave(&bfad->bfa.ioc, |
ab2a9ba1 JH |
140 | fw_debug->debug_buffer, |
141 | &fw_debug->buffer_len); | |
142 | spin_unlock_irqrestore(&bfad->bfad_lock, flags); | |
143 | if (rc != BFA_STATUS_OK) { | |
144 | vfree(fw_debug->debug_buffer); | |
145 | fw_debug->debug_buffer = NULL; | |
146 | kfree(fw_debug); | |
147 | printk(KERN_INFO "bfad[%d]: Failed to collect fwsave\n", | |
148 | bfad->inst_no); | |
149 | return -ENOMEM; | |
150 | } | |
151 | ||
152 | file->private_data = fw_debug; | |
153 | ||
154 | return 0; | |
155 | } | |
156 | ||
157 | static int | |
158 | bfad_debugfs_open_reg(struct inode *inode, struct file *file) | |
159 | { | |
160 | struct bfad_debug_info *reg_debug; | |
161 | ||
162 | reg_debug = kzalloc(sizeof(struct bfad_debug_info), GFP_KERNEL); | |
163 | if (!reg_debug) | |
164 | return -ENOMEM; | |
165 | ||
166 | reg_debug->i_private = inode->i_private; | |
167 | ||
168 | file->private_data = reg_debug; | |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
173 | /* Changes the current file position */ | |
174 | static loff_t | |
175 | bfad_debugfs_lseek(struct file *file, loff_t offset, int orig) | |
176 | { | |
c04eba72 AV |
177 | struct bfad_debug_info *debug = file->private_data; |
178 | return fixed_size_llseek(file, offset, orig, | |
179 | debug->buffer_len); | |
ab2a9ba1 JH |
180 | } |
181 | ||
182 | static ssize_t | |
183 | bfad_debugfs_read(struct file *file, char __user *buf, | |
184 | size_t nbytes, loff_t *pos) | |
185 | { | |
186 | struct bfad_debug_info *debug = file->private_data; | |
187 | ||
188 | if (!debug || !debug->debug_buffer) | |
189 | return 0; | |
190 | ||
52f94b6f | 191 | return simple_read_from_buffer(buf, nbytes, pos, |
ab2a9ba1 JH |
192 | debug->debug_buffer, debug->buffer_len); |
193 | } | |
194 | ||
195 | #define BFA_REG_CT_ADDRSZ (0x40000) | |
196 | #define BFA_REG_CB_ADDRSZ (0x20000) | |
3d7fc66d KG |
197 | #define BFA_REG_ADDRSZ(__ioc) \ |
198 | ((u32)(bfa_asic_id_ctc(bfa_ioc_devid(__ioc)) ? \ | |
199 | BFA_REG_CT_ADDRSZ : BFA_REG_CB_ADDRSZ)) | |
200 | #define BFA_REG_ADDRMSK(__ioc) (BFA_REG_ADDRSZ(__ioc) - 1) | |
ab2a9ba1 JH |
201 | |
202 | static bfa_status_t | |
203 | bfad_reg_offset_check(struct bfa_s *bfa, u32 offset, u32 len) | |
204 | { | |
205 | u8 area; | |
206 | ||
207 | /* check [16:15] */ | |
208 | area = (offset >> 15) & 0x7; | |
209 | if (area == 0) { | |
210 | /* PCIe core register */ | |
211 | if ((offset + (len<<2)) > 0x8000) /* 8k dwords or 32KB */ | |
212 | return BFA_STATUS_EINVAL; | |
213 | } else if (area == 0x1) { | |
214 | /* CB 32 KB memory page */ | |
215 | if ((offset + (len<<2)) > 0x10000) /* 8k dwords or 32KB */ | |
216 | return BFA_STATUS_EINVAL; | |
217 | } else { | |
218 | /* CB register space 64KB */ | |
3d7fc66d | 219 | if ((offset + (len<<2)) > BFA_REG_ADDRMSK(&bfa->ioc)) |
ab2a9ba1 JH |
220 | return BFA_STATUS_EINVAL; |
221 | } | |
222 | return BFA_STATUS_OK; | |
223 | } | |
224 | ||
225 | static ssize_t | |
226 | bfad_debugfs_read_regrd(struct file *file, char __user *buf, | |
227 | size_t nbytes, loff_t *pos) | |
228 | { | |
229 | struct bfad_debug_info *regrd_debug = file->private_data; | |
230 | struct bfad_port_s *port = (struct bfad_port_s *)regrd_debug->i_private; | |
231 | struct bfad_s *bfad = port->bfad; | |
232 | ssize_t rc; | |
233 | ||
234 | if (!bfad->regdata) | |
235 | return 0; | |
236 | ||
52f94b6f | 237 | rc = simple_read_from_buffer(buf, nbytes, pos, |
ab2a9ba1 JH |
238 | bfad->regdata, bfad->reglen); |
239 | ||
240 | if ((*pos + nbytes) >= bfad->reglen) { | |
241 | kfree(bfad->regdata); | |
242 | bfad->regdata = NULL; | |
243 | bfad->reglen = 0; | |
244 | } | |
245 | ||
246 | return rc; | |
247 | } | |
248 | ||
249 | static ssize_t | |
250 | bfad_debugfs_write_regrd(struct file *file, const char __user *buf, | |
251 | size_t nbytes, loff_t *ppos) | |
252 | { | |
253 | struct bfad_debug_info *regrd_debug = file->private_data; | |
254 | struct bfad_port_s *port = (struct bfad_port_s *)regrd_debug->i_private; | |
255 | struct bfad_s *bfad = port->bfad; | |
256 | struct bfa_s *bfa = &bfad->bfa; | |
257 | struct bfa_ioc_s *ioc = &bfa->ioc; | |
258 | int addr, len, rc, i; | |
259 | u32 *regbuf; | |
260 | void __iomem *rb, *reg_addr; | |
261 | unsigned long flags; | |
52f94b6f | 262 | void *kern_buf; |
ab2a9ba1 | 263 | |
9f30b674 FF |
264 | kern_buf = memdup_user(buf, nbytes); |
265 | if (IS_ERR(kern_buf)) | |
266 | return PTR_ERR(kern_buf); | |
52f94b6f M |
267 | |
268 | rc = sscanf(kern_buf, "%x:%x", &addr, &len); | |
ab2a9ba1 JH |
269 | if (rc < 2) { |
270 | printk(KERN_INFO | |
271 | "bfad[%d]: %s failed to read user buf\n", | |
272 | bfad->inst_no, __func__); | |
52f94b6f | 273 | kfree(kern_buf); |
ab2a9ba1 JH |
274 | return -EINVAL; |
275 | } | |
276 | ||
52f94b6f | 277 | kfree(kern_buf); |
ab2a9ba1 JH |
278 | kfree(bfad->regdata); |
279 | bfad->regdata = NULL; | |
280 | bfad->reglen = 0; | |
281 | ||
282 | bfad->regdata = kzalloc(len << 2, GFP_KERNEL); | |
283 | if (!bfad->regdata) { | |
284 | printk(KERN_INFO "bfad[%d]: Failed to allocate regrd buffer\n", | |
285 | bfad->inst_no); | |
286 | return -ENOMEM; | |
287 | } | |
288 | ||
289 | bfad->reglen = len << 2; | |
290 | rb = bfa_ioc_bar0(ioc); | |
3d7fc66d | 291 | addr &= BFA_REG_ADDRMSK(ioc); |
ab2a9ba1 JH |
292 | |
293 | /* offset and len sanity check */ | |
294 | rc = bfad_reg_offset_check(bfa, addr, len); | |
295 | if (rc) { | |
296 | printk(KERN_INFO "bfad[%d]: Failed reg offset check\n", | |
297 | bfad->inst_no); | |
298 | kfree(bfad->regdata); | |
299 | bfad->regdata = NULL; | |
300 | bfad->reglen = 0; | |
301 | return -EINVAL; | |
302 | } | |
303 | ||
304 | reg_addr = rb + addr; | |
305 | regbuf = (u32 *)bfad->regdata; | |
306 | spin_lock_irqsave(&bfad->bfad_lock, flags); | |
307 | for (i = 0; i < len; i++) { | |
53440260 | 308 | *regbuf = readl(reg_addr); |
ab2a9ba1 JH |
309 | regbuf++; |
310 | reg_addr += sizeof(u32); | |
311 | } | |
312 | spin_unlock_irqrestore(&bfad->bfad_lock, flags); | |
313 | ||
314 | return nbytes; | |
315 | } | |
316 | ||
317 | static ssize_t | |
318 | bfad_debugfs_write_regwr(struct file *file, const char __user *buf, | |
319 | size_t nbytes, loff_t *ppos) | |
320 | { | |
321 | struct bfad_debug_info *debug = file->private_data; | |
322 | struct bfad_port_s *port = (struct bfad_port_s *)debug->i_private; | |
323 | struct bfad_s *bfad = port->bfad; | |
324 | struct bfa_s *bfa = &bfad->bfa; | |
325 | struct bfa_ioc_s *ioc = &bfa->ioc; | |
326 | int addr, val, rc; | |
327 | void __iomem *reg_addr; | |
328 | unsigned long flags; | |
52f94b6f M |
329 | void *kern_buf; |
330 | ||
9f30b674 FF |
331 | kern_buf = memdup_user(buf, nbytes); |
332 | if (IS_ERR(kern_buf)) | |
333 | return PTR_ERR(kern_buf); | |
ab2a9ba1 | 334 | |
52f94b6f | 335 | rc = sscanf(kern_buf, "%x:%x", &addr, &val); |
ab2a9ba1 JH |
336 | if (rc < 2) { |
337 | printk(KERN_INFO | |
338 | "bfad[%d]: %s failed to read user buf\n", | |
339 | bfad->inst_no, __func__); | |
52f94b6f | 340 | kfree(kern_buf); |
ab2a9ba1 JH |
341 | return -EINVAL; |
342 | } | |
52f94b6f | 343 | kfree(kern_buf); |
ab2a9ba1 | 344 | |
3d7fc66d | 345 | addr &= BFA_REG_ADDRMSK(ioc); /* offset only 17 bit and word align */ |
ab2a9ba1 JH |
346 | |
347 | /* offset and len sanity check */ | |
348 | rc = bfad_reg_offset_check(bfa, addr, 1); | |
349 | if (rc) { | |
350 | printk(KERN_INFO | |
351 | "bfad[%d]: Failed reg offset check\n", | |
352 | bfad->inst_no); | |
353 | return -EINVAL; | |
354 | } | |
355 | ||
52f94b6f | 356 | reg_addr = (bfa_ioc_bar0(ioc)) + addr; |
ab2a9ba1 | 357 | spin_lock_irqsave(&bfad->bfad_lock, flags); |
53440260 | 358 | writel(val, reg_addr); |
ab2a9ba1 JH |
359 | spin_unlock_irqrestore(&bfad->bfad_lock, flags); |
360 | ||
361 | return nbytes; | |
362 | } | |
363 | ||
364 | static int | |
365 | bfad_debugfs_release(struct inode *inode, struct file *file) | |
366 | { | |
367 | struct bfad_debug_info *debug = file->private_data; | |
368 | ||
369 | if (!debug) | |
370 | return 0; | |
371 | ||
372 | file->private_data = NULL; | |
373 | kfree(debug); | |
374 | return 0; | |
375 | } | |
376 | ||
377 | static int | |
378 | bfad_debugfs_release_fwtrc(struct inode *inode, struct file *file) | |
379 | { | |
380 | struct bfad_debug_info *fw_debug = file->private_data; | |
381 | ||
382 | if (!fw_debug) | |
383 | return 0; | |
384 | ||
385 | if (fw_debug->debug_buffer) | |
386 | vfree(fw_debug->debug_buffer); | |
387 | ||
388 | file->private_data = NULL; | |
389 | kfree(fw_debug); | |
390 | return 0; | |
391 | } | |
392 | ||
393 | static const struct file_operations bfad_debugfs_op_drvtrc = { | |
394 | .owner = THIS_MODULE, | |
395 | .open = bfad_debugfs_open_drvtrc, | |
396 | .llseek = bfad_debugfs_lseek, | |
397 | .read = bfad_debugfs_read, | |
398 | .release = bfad_debugfs_release, | |
399 | }; | |
400 | ||
401 | static const struct file_operations bfad_debugfs_op_fwtrc = { | |
402 | .owner = THIS_MODULE, | |
403 | .open = bfad_debugfs_open_fwtrc, | |
404 | .llseek = bfad_debugfs_lseek, | |
405 | .read = bfad_debugfs_read, | |
406 | .release = bfad_debugfs_release_fwtrc, | |
407 | }; | |
408 | ||
409 | static const struct file_operations bfad_debugfs_op_fwsave = { | |
410 | .owner = THIS_MODULE, | |
411 | .open = bfad_debugfs_open_fwsave, | |
412 | .llseek = bfad_debugfs_lseek, | |
413 | .read = bfad_debugfs_read, | |
414 | .release = bfad_debugfs_release_fwtrc, | |
415 | }; | |
416 | ||
417 | static const struct file_operations bfad_debugfs_op_regrd = { | |
418 | .owner = THIS_MODULE, | |
419 | .open = bfad_debugfs_open_reg, | |
420 | .llseek = bfad_debugfs_lseek, | |
421 | .read = bfad_debugfs_read_regrd, | |
422 | .write = bfad_debugfs_write_regrd, | |
423 | .release = bfad_debugfs_release, | |
424 | }; | |
425 | ||
426 | static const struct file_operations bfad_debugfs_op_regwr = { | |
427 | .owner = THIS_MODULE, | |
428 | .open = bfad_debugfs_open_reg, | |
429 | .llseek = bfad_debugfs_lseek, | |
430 | .write = bfad_debugfs_write_regwr, | |
431 | .release = bfad_debugfs_release, | |
432 | }; | |
433 | ||
434 | struct bfad_debugfs_entry { | |
435 | const char *name; | |
f4ae40a6 | 436 | umode_t mode; |
ab2a9ba1 JH |
437 | const struct file_operations *fops; |
438 | }; | |
439 | ||
440 | static const struct bfad_debugfs_entry bfad_debugfs_files[] = { | |
441 | { "drvtrc", S_IFREG|S_IRUGO, &bfad_debugfs_op_drvtrc, }, | |
442 | { "fwtrc", S_IFREG|S_IRUGO, &bfad_debugfs_op_fwtrc, }, | |
443 | { "fwsave", S_IFREG|S_IRUGO, &bfad_debugfs_op_fwsave, }, | |
444 | { "regrd", S_IFREG|S_IRUGO|S_IWUSR, &bfad_debugfs_op_regrd, }, | |
445 | { "regwr", S_IFREG|S_IWUSR, &bfad_debugfs_op_regwr, }, | |
446 | }; | |
447 | ||
448 | static struct dentry *bfa_debugfs_root; | |
449 | static atomic_t bfa_debugfs_port_count; | |
450 | ||
451 | inline void | |
452 | bfad_debugfs_init(struct bfad_port_s *port) | |
453 | { | |
7c38c05b | 454 | struct bfad_s *bfad = port->bfad; |
ab2a9ba1 | 455 | const struct bfad_debugfs_entry *file; |
7c38c05b | 456 | char name[64]; |
ab2a9ba1 JH |
457 | int i; |
458 | ||
459 | if (!bfa_debugfs_enable) | |
460 | return; | |
461 | ||
462 | /* Setup the BFA debugfs root directory*/ | |
463 | if (!bfa_debugfs_root) { | |
464 | bfa_debugfs_root = debugfs_create_dir("bfa", NULL); | |
465 | atomic_set(&bfa_debugfs_port_count, 0); | |
466 | if (!bfa_debugfs_root) { | |
467 | printk(KERN_WARNING | |
468 | "BFA debugfs root dir creation failed\n"); | |
469 | goto err; | |
470 | } | |
471 | } | |
472 | ||
7c38c05b KG |
473 | /* Setup the pci_dev debugfs directory for the port */ |
474 | snprintf(name, sizeof(name), "pci_dev:%s", bfad->pci_name); | |
ab2a9ba1 JH |
475 | if (!port->port_debugfs_root) { |
476 | port->port_debugfs_root = | |
477 | debugfs_create_dir(name, bfa_debugfs_root); | |
478 | if (!port->port_debugfs_root) { | |
479 | printk(KERN_WARNING | |
7c38c05b KG |
480 | "bfa %s: debugfs root creation failed\n", |
481 | bfad->pci_name); | |
ab2a9ba1 JH |
482 | goto err; |
483 | } | |
484 | ||
485 | atomic_inc(&bfa_debugfs_port_count); | |
486 | ||
487 | for (i = 0; i < ARRAY_SIZE(bfad_debugfs_files); i++) { | |
488 | file = &bfad_debugfs_files[i]; | |
489 | bfad->bfad_dentry_files[i] = | |
490 | debugfs_create_file(file->name, | |
491 | file->mode, | |
492 | port->port_debugfs_root, | |
493 | port, | |
494 | file->fops); | |
495 | if (!bfad->bfad_dentry_files[i]) { | |
496 | printk(KERN_WARNING | |
7c38c05b KG |
497 | "bfa %s: debugfs %s creation failed\n", |
498 | bfad->pci_name, file->name); | |
ab2a9ba1 JH |
499 | goto err; |
500 | } | |
501 | } | |
502 | } | |
503 | ||
504 | err: | |
505 | return; | |
506 | } | |
507 | ||
508 | inline void | |
509 | bfad_debugfs_exit(struct bfad_port_s *port) | |
510 | { | |
7c38c05b | 511 | struct bfad_s *bfad = port->bfad; |
ab2a9ba1 JH |
512 | int i; |
513 | ||
514 | for (i = 0; i < ARRAY_SIZE(bfad_debugfs_files); i++) { | |
515 | if (bfad->bfad_dentry_files[i]) { | |
516 | debugfs_remove(bfad->bfad_dentry_files[i]); | |
517 | bfad->bfad_dentry_files[i] = NULL; | |
518 | } | |
519 | } | |
520 | ||
275a63ac | 521 | /* Remove the pci_dev debugfs directory for the port */ |
ab2a9ba1 JH |
522 | if (port->port_debugfs_root) { |
523 | debugfs_remove(port->port_debugfs_root); | |
524 | port->port_debugfs_root = NULL; | |
525 | atomic_dec(&bfa_debugfs_port_count); | |
526 | } | |
527 | ||
528 | /* Remove the BFA debugfs root directory */ | |
529 | if (atomic_read(&bfa_debugfs_port_count) == 0) { | |
530 | debugfs_remove(bfa_debugfs_root); | |
531 | bfa_debugfs_root = NULL; | |
532 | } | |
533 | } |