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19#include <linux/debugfs.h>
20#include <linux/export.h>
21
22#include "bfad_drv.h"
23#include "bfad_im.h"
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43
44struct bfad_debug_info {
45 char *debug_buffer;
46 void *i_private;
47 int buffer_len;
48};
49
50static int
51bfad_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
69static int
70bfad_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);
95 rc = bfa_ioc_debug_fwtrc(&bfad->bfa.ioc,
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
113static int
114bfad_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);
139 rc = bfa_ioc_debug_fwsave(&bfad->bfa.ioc,
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
157static int
158bfad_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
174static loff_t
175bfad_debugfs_lseek(struct file *file, loff_t offset, int orig)
176{
177 struct bfad_debug_info *debug = file->private_data;
178 return fixed_size_llseek(file, offset, orig,
179 debug->buffer_len);
180}
181
182static ssize_t
183bfad_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
191 return simple_read_from_buffer(buf, nbytes, pos,
192 debug->debug_buffer, debug->buffer_len);
193}
194
195#define BFA_REG_CT_ADDRSZ (0x40000)
196#define BFA_REG_CB_ADDRSZ (0x20000)
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)
201
202static bfa_status_t
203bfad_reg_offset_check(struct bfa_s *bfa, u32 offset, u32 len)
204{
205 u8 area;
206
207
208 area = (offset >> 15) & 0x7;
209 if (area == 0) {
210
211 if ((offset + (len<<2)) > 0x8000)
212 return BFA_STATUS_EINVAL;
213 } else if (area == 0x1) {
214
215 if ((offset + (len<<2)) > 0x10000)
216 return BFA_STATUS_EINVAL;
217 } else {
218
219 if ((offset + (len<<2)) > BFA_REG_ADDRMSK(&bfa->ioc))
220 return BFA_STATUS_EINVAL;
221 }
222 return BFA_STATUS_OK;
223}
224
225static ssize_t
226bfad_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
237 rc = simple_read_from_buffer(buf, nbytes, pos,
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
249static ssize_t
250bfad_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;
262 void *kern_buf;
263
264 kern_buf = memdup_user(buf, nbytes);
265 if (IS_ERR(kern_buf))
266 return PTR_ERR(kern_buf);
267
268 rc = sscanf(kern_buf, "%x:%x", &addr, &len);
269 if (rc < 2) {
270 printk(KERN_INFO
271 "bfad[%d]: %s failed to read user buf\n",
272 bfad->inst_no, __func__);
273 kfree(kern_buf);
274 return -EINVAL;
275 }
276
277 kfree(kern_buf);
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);
291 addr &= BFA_REG_ADDRMSK(ioc);
292
293
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++) {
308 *regbuf = readl(reg_addr);
309 regbuf++;
310 reg_addr += sizeof(u32);
311 }
312 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
313
314 return nbytes;
315}
316
317static ssize_t
318bfad_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;
329 void *kern_buf;
330
331 kern_buf = memdup_user(buf, nbytes);
332 if (IS_ERR(kern_buf))
333 return PTR_ERR(kern_buf);
334
335 rc = sscanf(kern_buf, "%x:%x", &addr, &val);
336 if (rc < 2) {
337 printk(KERN_INFO
338 "bfad[%d]: %s failed to read user buf\n",
339 bfad->inst_no, __func__);
340 kfree(kern_buf);
341 return -EINVAL;
342 }
343 kfree(kern_buf);
344
345 addr &= BFA_REG_ADDRMSK(ioc);
346
347
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
356 reg_addr = (bfa_ioc_bar0(ioc)) + addr;
357 spin_lock_irqsave(&bfad->bfad_lock, flags);
358 writel(val, reg_addr);
359 spin_unlock_irqrestore(&bfad->bfad_lock, flags);
360
361 return nbytes;
362}
363
364static int
365bfad_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
377static int
378bfad_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
393static 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
401static 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
409static 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
417static 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
426static 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
434struct bfad_debugfs_entry {
435 const char *name;
436 umode_t mode;
437 const struct file_operations *fops;
438};
439
440static 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
448static struct dentry *bfa_debugfs_root;
449static atomic_t bfa_debugfs_port_count;
450
451inline void
452bfad_debugfs_init(struct bfad_port_s *port)
453{
454 struct bfad_s *bfad = port->bfad;
455 const struct bfad_debugfs_entry *file;
456 char name[64];
457 int i;
458
459 if (!bfa_debugfs_enable)
460 return;
461
462
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
473
474 snprintf(name, sizeof(name), "pci_dev:%s", bfad->pci_name);
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
480 "bfa %s: debugfs root creation failed\n",
481 bfad->pci_name);
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
497 "bfa %s: debugfs %s creation failed\n",
498 bfad->pci_name, file->name);
499 goto err;
500 }
501 }
502 }
503
504err:
505 return;
506}
507
508inline void
509bfad_debugfs_exit(struct bfad_port_s *port)
510{
511 struct bfad_s *bfad = port->bfad;
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
521
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
529 if (atomic_read(&bfa_debugfs_port_count) == 0) {
530 debugfs_remove(bfa_debugfs_root);
531 bfa_debugfs_root = NULL;
532 }
533}
534
