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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Procfs interface for the PCI bus
4 *
5 * Copyright (c) 1997--1999 Martin Mares <mj@ucw.cz>
6 */
7
8#include <linux/init.h>
9#include <linux/pci.h>
10#include <linux/slab.h>
11#include <linux/module.h>
12#include <linux/proc_fs.h>
13#include <linux/seq_file.h>
14#include <linux/capability.h>
15#include <linux/uaccess.h>
16#include <linux/security.h>
17#include <asm/byteorder.h>
18#include "pci.h"
19
20static int proc_initialized; /* = 0 */
21
22static loff_t proc_bus_pci_lseek(struct file *file, loff_t off, int whence)
23{
24 struct pci_dev *dev = pde_data(file_inode(file));
25 return fixed_size_llseek(file, off, whence, dev->cfg_size);
26}
27
28static ssize_t proc_bus_pci_read(struct file *file, char __user *buf,
29 size_t nbytes, loff_t *ppos)
30{
31 struct pci_dev *dev = pde_data(file_inode(file));
32 unsigned int pos = *ppos;
33 unsigned int cnt, size;
34
35 /*
36 * Normal users can read only the standardized portion of the
37 * configuration space as several chips lock up when trying to read
38 * undefined locations (think of Intel PIIX4 as a typical example).
39 */
40
41 if (capable(CAP_SYS_ADMIN))
42 size = dev->cfg_size;
43 else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
44 size = 128;
45 else
46 size = 64;
47
48 if (pos >= size)
49 return 0;
50 if (nbytes >= size)
51 nbytes = size;
52 if (pos + nbytes > size)
53 nbytes = size - pos;
54 cnt = nbytes;
55
56 if (!access_ok(buf, cnt))
57 return -EINVAL;
58
59 pci_config_pm_runtime_get(dev);
60
61 if ((pos & 1) && cnt) {
62 unsigned char val;
63 pci_user_read_config_byte(dev, pos, &val);
64 __put_user(val, buf);
65 buf++;
66 pos++;
67 cnt--;
68 }
69
70 if ((pos & 3) && cnt > 2) {
71 unsigned short val;
72 pci_user_read_config_word(dev, pos, &val);
73 __put_user(cpu_to_le16(val), (__le16 __user *) buf);
74 buf += 2;
75 pos += 2;
76 cnt -= 2;
77 }
78
79 while (cnt >= 4) {
80 unsigned int val;
81 pci_user_read_config_dword(dev, pos, &val);
82 __put_user(cpu_to_le32(val), (__le32 __user *) buf);
83 buf += 4;
84 pos += 4;
85 cnt -= 4;
86 cond_resched();
87 }
88
89 if (cnt >= 2) {
90 unsigned short val;
91 pci_user_read_config_word(dev, pos, &val);
92 __put_user(cpu_to_le16(val), (__le16 __user *) buf);
93 buf += 2;
94 pos += 2;
95 cnt -= 2;
96 }
97
98 if (cnt) {
99 unsigned char val;
100 pci_user_read_config_byte(dev, pos, &val);
101 __put_user(val, buf);
102 pos++;
103 }
104
105 pci_config_pm_runtime_put(dev);
106
107 *ppos = pos;
108 return nbytes;
109}
110
111static ssize_t proc_bus_pci_write(struct file *file, const char __user *buf,
112 size_t nbytes, loff_t *ppos)
113{
114 struct inode *ino = file_inode(file);
115 struct pci_dev *dev = pde_data(ino);
116 int pos = *ppos;
117 int size = dev->cfg_size;
118 int cnt, ret;
119
120 ret = security_locked_down(LOCKDOWN_PCI_ACCESS);
121 if (ret)
122 return ret;
123
124 if (pos >= size)
125 return 0;
126 if (nbytes >= size)
127 nbytes = size;
128 if (pos + nbytes > size)
129 nbytes = size - pos;
130 cnt = nbytes;
131
132 if (!access_ok(buf, cnt))
133 return -EINVAL;
134
135 pci_config_pm_runtime_get(dev);
136
137 if ((pos & 1) && cnt) {
138 unsigned char val;
139 __get_user(val, buf);
140 pci_user_write_config_byte(dev, pos, val);
141 buf++;
142 pos++;
143 cnt--;
144 }
145
146 if ((pos & 3) && cnt > 2) {
147 __le16 val;
148 __get_user(val, (__le16 __user *) buf);
149 pci_user_write_config_word(dev, pos, le16_to_cpu(val));
150 buf += 2;
151 pos += 2;
152 cnt -= 2;
153 }
154
155 while (cnt >= 4) {
156 __le32 val;
157 __get_user(val, (__le32 __user *) buf);
158 pci_user_write_config_dword(dev, pos, le32_to_cpu(val));
159 buf += 4;
160 pos += 4;
161 cnt -= 4;
162 }
163
164 if (cnt >= 2) {
165 __le16 val;
166 __get_user(val, (__le16 __user *) buf);
167 pci_user_write_config_word(dev, pos, le16_to_cpu(val));
168 buf += 2;
169 pos += 2;
170 cnt -= 2;
171 }
172
173 if (cnt) {
174 unsigned char val;
175 __get_user(val, buf);
176 pci_user_write_config_byte(dev, pos, val);
177 pos++;
178 }
179
180 pci_config_pm_runtime_put(dev);
181
182 *ppos = pos;
183 i_size_write(ino, dev->cfg_size);
184 return nbytes;
185}
186
187#ifdef HAVE_PCI_MMAP
188struct pci_filp_private {
189 enum pci_mmap_state mmap_state;
190 int write_combine;
191};
192#endif /* HAVE_PCI_MMAP */
193
194static long proc_bus_pci_ioctl(struct file *file, unsigned int cmd,
195 unsigned long arg)
196{
197 struct pci_dev *dev = pde_data(file_inode(file));
198#ifdef HAVE_PCI_MMAP
199 struct pci_filp_private *fpriv = file->private_data;
200#endif /* HAVE_PCI_MMAP */
201 int ret = 0;
202
203 ret = security_locked_down(LOCKDOWN_PCI_ACCESS);
204 if (ret)
205 return ret;
206
207 switch (cmd) {
208 case PCIIOC_CONTROLLER:
209 ret = pci_domain_nr(dev->bus);
210 break;
211
212#ifdef HAVE_PCI_MMAP
213 case PCIIOC_MMAP_IS_IO:
214 if (!arch_can_pci_mmap_io())
215 return -EINVAL;
216 fpriv->mmap_state = pci_mmap_io;
217 break;
218
219 case PCIIOC_MMAP_IS_MEM:
220 fpriv->mmap_state = pci_mmap_mem;
221 break;
222
223 case PCIIOC_WRITE_COMBINE:
224 if (arch_can_pci_mmap_wc()) {
225 if (arg)
226 fpriv->write_combine = 1;
227 else
228 fpriv->write_combine = 0;
229 break;
230 }
231 /* If arch decided it can't, fall through... */
232 fallthrough;
233#endif /* HAVE_PCI_MMAP */
234 default:
235 ret = -EINVAL;
236 break;
237 }
238
239 return ret;
240}
241
242#ifdef HAVE_PCI_MMAP
243static int proc_bus_pci_mmap(struct file *file, struct vm_area_struct *vma)
244{
245 struct pci_dev *dev = pde_data(file_inode(file));
246 struct pci_filp_private *fpriv = file->private_data;
247 resource_size_t start, end;
248 int i, ret, write_combine = 0, res_bit = IORESOURCE_MEM;
249
250 if (!capable(CAP_SYS_RAWIO) ||
251 security_locked_down(LOCKDOWN_PCI_ACCESS))
252 return -EPERM;
253
254 if (fpriv->mmap_state == pci_mmap_io) {
255 if (!arch_can_pci_mmap_io())
256 return -EINVAL;
257 res_bit = IORESOURCE_IO;
258 }
259
260 /* Make sure the caller is mapping a real resource for this device */
261 for (i = 0; i < PCI_STD_NUM_BARS; i++) {
262 if (dev->resource[i].flags & res_bit &&
263 pci_mmap_fits(dev, i, vma, PCI_MMAP_PROCFS))
264 break;
265 }
266
267 if (i >= PCI_STD_NUM_BARS)
268 return -ENODEV;
269
270 if (fpriv->mmap_state == pci_mmap_mem &&
271 fpriv->write_combine) {
272 if (dev->resource[i].flags & IORESOURCE_PREFETCH)
273 write_combine = 1;
274 else
275 return -EINVAL;
276 }
277
278 if (dev->resource[i].flags & IORESOURCE_MEM &&
279 iomem_is_exclusive(dev->resource[i].start))
280 return -EINVAL;
281
282 pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
283
284 /* Adjust vm_pgoff to be the offset within the resource */
285 vma->vm_pgoff -= start >> PAGE_SHIFT;
286 ret = pci_mmap_resource_range(dev, i, vma,
287 fpriv->mmap_state, write_combine);
288 if (ret < 0)
289 return ret;
290
291 return 0;
292}
293
294static int proc_bus_pci_open(struct inode *inode, struct file *file)
295{
296 struct pci_filp_private *fpriv = kmalloc(sizeof(*fpriv), GFP_KERNEL);
297
298 if (!fpriv)
299 return -ENOMEM;
300
301 fpriv->mmap_state = pci_mmap_io;
302 fpriv->write_combine = 0;
303
304 file->private_data = fpriv;
305 file->f_mapping = iomem_get_mapping();
306
307 return 0;
308}
309
310static int proc_bus_pci_release(struct inode *inode, struct file *file)
311{
312 kfree(file->private_data);
313 file->private_data = NULL;
314
315 return 0;
316}
317#endif /* HAVE_PCI_MMAP */
318
319static const struct proc_ops proc_bus_pci_ops = {
320 .proc_lseek = proc_bus_pci_lseek,
321 .proc_read = proc_bus_pci_read,
322 .proc_write = proc_bus_pci_write,
323 .proc_ioctl = proc_bus_pci_ioctl,
324#ifdef CONFIG_COMPAT
325 .proc_compat_ioctl = proc_bus_pci_ioctl,
326#endif
327#ifdef HAVE_PCI_MMAP
328 .proc_open = proc_bus_pci_open,
329 .proc_release = proc_bus_pci_release,
330 .proc_mmap = proc_bus_pci_mmap,
331#ifdef HAVE_ARCH_PCI_GET_UNMAPPED_AREA
332 .proc_get_unmapped_area = get_pci_unmapped_area,
333#endif /* HAVE_ARCH_PCI_GET_UNMAPPED_AREA */
334#endif /* HAVE_PCI_MMAP */
335};
336
337/* iterator */
338static void *pci_seq_start(struct seq_file *m, loff_t *pos)
339{
340 struct pci_dev *dev = NULL;
341 loff_t n = *pos;
342
343 for_each_pci_dev(dev) {
344 if (!n--)
345 break;
346 }
347 return dev;
348}
349
350static void *pci_seq_next(struct seq_file *m, void *v, loff_t *pos)
351{
352 struct pci_dev *dev = v;
353
354 (*pos)++;
355 dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
356 return dev;
357}
358
359static void pci_seq_stop(struct seq_file *m, void *v)
360{
361 if (v) {
362 struct pci_dev *dev = v;
363 pci_dev_put(dev);
364 }
365}
366
367static int show_device(struct seq_file *m, void *v)
368{
369 const struct pci_dev *dev = v;
370 const struct pci_driver *drv;
371 int i;
372
373 if (dev == NULL)
374 return 0;
375
376 drv = pci_dev_driver(dev);
377 seq_printf(m, "%02x%02x\t%04x%04x\t%x",
378 dev->bus->number,
379 dev->devfn,
380 dev->vendor,
381 dev->device,
382 dev->irq);
383
384 /* only print standard and ROM resources to preserve compatibility */
385 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
386 resource_size_t start, end;
387 pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
388 seq_printf(m, "\t%16llx",
389 (unsigned long long)(start |
390 (dev->resource[i].flags & PCI_REGION_FLAG_MASK)));
391 }
392 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
393 resource_size_t start, end;
394 pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
395 seq_printf(m, "\t%16llx",
396 dev->resource[i].start < dev->resource[i].end ?
397 (unsigned long long)(end - start) + 1 : 0);
398 }
399 seq_putc(m, '\t');
400 if (drv)
401 seq_puts(m, drv->name);
402 seq_putc(m, '\n');
403 return 0;
404}
405
406static const struct seq_operations proc_bus_pci_devices_op = {
407 .start = pci_seq_start,
408 .next = pci_seq_next,
409 .stop = pci_seq_stop,
410 .show = show_device
411};
412
413static struct proc_dir_entry *proc_bus_pci_dir;
414
415int pci_proc_attach_device(struct pci_dev *dev)
416{
417 struct pci_bus *bus = dev->bus;
418 struct proc_dir_entry *e;
419 char name[16];
420
421 if (!proc_initialized)
422 return -EACCES;
423
424 if (!bus->procdir) {
425 if (pci_proc_domain(bus)) {
426 sprintf(name, "%04x:%02x", pci_domain_nr(bus),
427 bus->number);
428 } else {
429 sprintf(name, "%02x", bus->number);
430 }
431 bus->procdir = proc_mkdir(name, proc_bus_pci_dir);
432 if (!bus->procdir)
433 return -ENOMEM;
434 }
435
436 sprintf(name, "%02x.%x", PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
437 e = proc_create_data(name, S_IFREG | S_IRUGO | S_IWUSR, bus->procdir,
438 &proc_bus_pci_ops, dev);
439 if (!e)
440 return -ENOMEM;
441 proc_set_size(e, dev->cfg_size);
442 dev->procent = e;
443
444 return 0;
445}
446
447int pci_proc_detach_device(struct pci_dev *dev)
448{
449 proc_remove(dev->procent);
450 dev->procent = NULL;
451 return 0;
452}
453
454int pci_proc_detach_bus(struct pci_bus *bus)
455{
456 proc_remove(bus->procdir);
457 return 0;
458}
459
460static int __init pci_proc_init(void)
461{
462 struct pci_dev *dev = NULL;
463 proc_bus_pci_dir = proc_mkdir("bus/pci", NULL);
464 proc_create_seq("devices", 0, proc_bus_pci_dir,
465 &proc_bus_pci_devices_op);
466 proc_initialized = 1;
467 for_each_pci_dev(dev)
468 pci_proc_attach_device(dev);
469
470 return 0;
471}
472device_initcall(pci_proc_init);
1/*
2 * Procfs interface for the PCI bus.
3 *
4 * Copyright (c) 1997--1999 Martin Mares <mj@ucw.cz>
5 */
6
7#include <linux/init.h>
8#include <linux/pci.h>
9#include <linux/slab.h>
10#include <linux/module.h>
11#include <linux/proc_fs.h>
12#include <linux/seq_file.h>
13#include <linux/capability.h>
14#include <asm/uaccess.h>
15#include <asm/byteorder.h>
16#include "pci.h"
17
18static int proc_initialized; /* = 0 */
19
20static loff_t
21proc_bus_pci_lseek(struct file *file, loff_t off, int whence)
22{
23 loff_t new = -1;
24 struct inode *inode = file->f_path.dentry->d_inode;
25
26 mutex_lock(&inode->i_mutex);
27 switch (whence) {
28 case 0:
29 new = off;
30 break;
31 case 1:
32 new = file->f_pos + off;
33 break;
34 case 2:
35 new = inode->i_size + off;
36 break;
37 }
38 if (new < 0 || new > inode->i_size)
39 new = -EINVAL;
40 else
41 file->f_pos = new;
42 mutex_unlock(&inode->i_mutex);
43 return new;
44}
45
46static ssize_t
47proc_bus_pci_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
48{
49 const struct inode *ino = file->f_path.dentry->d_inode;
50 const struct proc_dir_entry *dp = PDE(ino);
51 struct pci_dev *dev = dp->data;
52 unsigned int pos = *ppos;
53 unsigned int cnt, size;
54
55 /*
56 * Normal users can read only the standardized portion of the
57 * configuration space as several chips lock up when trying to read
58 * undefined locations (think of Intel PIIX4 as a typical example).
59 */
60
61 if (capable(CAP_SYS_ADMIN))
62 size = dp->size;
63 else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
64 size = 128;
65 else
66 size = 64;
67
68 if (pos >= size)
69 return 0;
70 if (nbytes >= size)
71 nbytes = size;
72 if (pos + nbytes > size)
73 nbytes = size - pos;
74 cnt = nbytes;
75
76 if (!access_ok(VERIFY_WRITE, buf, cnt))
77 return -EINVAL;
78
79 if ((pos & 1) && cnt) {
80 unsigned char val;
81 pci_user_read_config_byte(dev, pos, &val);
82 __put_user(val, buf);
83 buf++;
84 pos++;
85 cnt--;
86 }
87
88 if ((pos & 3) && cnt > 2) {
89 unsigned short val;
90 pci_user_read_config_word(dev, pos, &val);
91 __put_user(cpu_to_le16(val), (__le16 __user *) buf);
92 buf += 2;
93 pos += 2;
94 cnt -= 2;
95 }
96
97 while (cnt >= 4) {
98 unsigned int val;
99 pci_user_read_config_dword(dev, pos, &val);
100 __put_user(cpu_to_le32(val), (__le32 __user *) buf);
101 buf += 4;
102 pos += 4;
103 cnt -= 4;
104 }
105
106 if (cnt >= 2) {
107 unsigned short val;
108 pci_user_read_config_word(dev, pos, &val);
109 __put_user(cpu_to_le16(val), (__le16 __user *) buf);
110 buf += 2;
111 pos += 2;
112 cnt -= 2;
113 }
114
115 if (cnt) {
116 unsigned char val;
117 pci_user_read_config_byte(dev, pos, &val);
118 __put_user(val, buf);
119 buf++;
120 pos++;
121 cnt--;
122 }
123
124 *ppos = pos;
125 return nbytes;
126}
127
128static ssize_t
129proc_bus_pci_write(struct file *file, const char __user *buf, size_t nbytes, loff_t *ppos)
130{
131 struct inode *ino = file->f_path.dentry->d_inode;
132 const struct proc_dir_entry *dp = PDE(ino);
133 struct pci_dev *dev = dp->data;
134 int pos = *ppos;
135 int size = dp->size;
136 int cnt;
137
138 if (pos >= size)
139 return 0;
140 if (nbytes >= size)
141 nbytes = size;
142 if (pos + nbytes > size)
143 nbytes = size - pos;
144 cnt = nbytes;
145
146 if (!access_ok(VERIFY_READ, buf, cnt))
147 return -EINVAL;
148
149 if ((pos & 1) && cnt) {
150 unsigned char val;
151 __get_user(val, buf);
152 pci_user_write_config_byte(dev, pos, val);
153 buf++;
154 pos++;
155 cnt--;
156 }
157
158 if ((pos & 3) && cnt > 2) {
159 __le16 val;
160 __get_user(val, (__le16 __user *) buf);
161 pci_user_write_config_word(dev, pos, le16_to_cpu(val));
162 buf += 2;
163 pos += 2;
164 cnt -= 2;
165 }
166
167 while (cnt >= 4) {
168 __le32 val;
169 __get_user(val, (__le32 __user *) buf);
170 pci_user_write_config_dword(dev, pos, le32_to_cpu(val));
171 buf += 4;
172 pos += 4;
173 cnt -= 4;
174 }
175
176 if (cnt >= 2) {
177 __le16 val;
178 __get_user(val, (__le16 __user *) buf);
179 pci_user_write_config_word(dev, pos, le16_to_cpu(val));
180 buf += 2;
181 pos += 2;
182 cnt -= 2;
183 }
184
185 if (cnt) {
186 unsigned char val;
187 __get_user(val, buf);
188 pci_user_write_config_byte(dev, pos, val);
189 buf++;
190 pos++;
191 cnt--;
192 }
193
194 *ppos = pos;
195 i_size_write(ino, dp->size);
196 return nbytes;
197}
198
199struct pci_filp_private {
200 enum pci_mmap_state mmap_state;
201 int write_combine;
202};
203
204static long proc_bus_pci_ioctl(struct file *file, unsigned int cmd,
205 unsigned long arg)
206{
207 const struct proc_dir_entry *dp = PDE(file->f_dentry->d_inode);
208 struct pci_dev *dev = dp->data;
209#ifdef HAVE_PCI_MMAP
210 struct pci_filp_private *fpriv = file->private_data;
211#endif /* HAVE_PCI_MMAP */
212 int ret = 0;
213
214 switch (cmd) {
215 case PCIIOC_CONTROLLER:
216 ret = pci_domain_nr(dev->bus);
217 break;
218
219#ifdef HAVE_PCI_MMAP
220 case PCIIOC_MMAP_IS_IO:
221 fpriv->mmap_state = pci_mmap_io;
222 break;
223
224 case PCIIOC_MMAP_IS_MEM:
225 fpriv->mmap_state = pci_mmap_mem;
226 break;
227
228 case PCIIOC_WRITE_COMBINE:
229 if (arg)
230 fpriv->write_combine = 1;
231 else
232 fpriv->write_combine = 0;
233 break;
234
235#endif /* HAVE_PCI_MMAP */
236
237 default:
238 ret = -EINVAL;
239 break;
240 };
241
242 return ret;
243}
244
245#ifdef HAVE_PCI_MMAP
246static int proc_bus_pci_mmap(struct file *file, struct vm_area_struct *vma)
247{
248 struct inode *inode = file->f_path.dentry->d_inode;
249 const struct proc_dir_entry *dp = PDE(inode);
250 struct pci_dev *dev = dp->data;
251 struct pci_filp_private *fpriv = file->private_data;
252 int i, ret;
253
254 if (!capable(CAP_SYS_RAWIO))
255 return -EPERM;
256
257 /* Make sure the caller is mapping a real resource for this device */
258 for (i = 0; i < PCI_ROM_RESOURCE; i++) {
259 if (pci_mmap_fits(dev, i, vma, PCI_MMAP_PROCFS))
260 break;
261 }
262
263 if (i >= PCI_ROM_RESOURCE)
264 return -ENODEV;
265
266 ret = pci_mmap_page_range(dev, vma,
267 fpriv->mmap_state,
268 fpriv->write_combine);
269 if (ret < 0)
270 return ret;
271
272 return 0;
273}
274
275static int proc_bus_pci_open(struct inode *inode, struct file *file)
276{
277 struct pci_filp_private *fpriv = kmalloc(sizeof(*fpriv), GFP_KERNEL);
278
279 if (!fpriv)
280 return -ENOMEM;
281
282 fpriv->mmap_state = pci_mmap_io;
283 fpriv->write_combine = 0;
284
285 file->private_data = fpriv;
286
287 return 0;
288}
289
290static int proc_bus_pci_release(struct inode *inode, struct file *file)
291{
292 kfree(file->private_data);
293 file->private_data = NULL;
294
295 return 0;
296}
297#endif /* HAVE_PCI_MMAP */
298
299static const struct file_operations proc_bus_pci_operations = {
300 .owner = THIS_MODULE,
301 .llseek = proc_bus_pci_lseek,
302 .read = proc_bus_pci_read,
303 .write = proc_bus_pci_write,
304 .unlocked_ioctl = proc_bus_pci_ioctl,
305 .compat_ioctl = proc_bus_pci_ioctl,
306#ifdef HAVE_PCI_MMAP
307 .open = proc_bus_pci_open,
308 .release = proc_bus_pci_release,
309 .mmap = proc_bus_pci_mmap,
310#ifdef HAVE_ARCH_PCI_GET_UNMAPPED_AREA
311 .get_unmapped_area = get_pci_unmapped_area,
312#endif /* HAVE_ARCH_PCI_GET_UNMAPPED_AREA */
313#endif /* HAVE_PCI_MMAP */
314};
315
316/* iterator */
317static void *pci_seq_start(struct seq_file *m, loff_t *pos)
318{
319 struct pci_dev *dev = NULL;
320 loff_t n = *pos;
321
322 for_each_pci_dev(dev) {
323 if (!n--)
324 break;
325 }
326 return dev;
327}
328
329static void *pci_seq_next(struct seq_file *m, void *v, loff_t *pos)
330{
331 struct pci_dev *dev = v;
332
333 (*pos)++;
334 dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev);
335 return dev;
336}
337
338static void pci_seq_stop(struct seq_file *m, void *v)
339{
340 if (v) {
341 struct pci_dev *dev = v;
342 pci_dev_put(dev);
343 }
344}
345
346static int show_device(struct seq_file *m, void *v)
347{
348 const struct pci_dev *dev = v;
349 const struct pci_driver *drv;
350 int i;
351
352 if (dev == NULL)
353 return 0;
354
355 drv = pci_dev_driver(dev);
356 seq_printf(m, "%02x%02x\t%04x%04x\t%x",
357 dev->bus->number,
358 dev->devfn,
359 dev->vendor,
360 dev->device,
361 dev->irq);
362
363 /* only print standard and ROM resources to preserve compatibility */
364 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
365 resource_size_t start, end;
366 pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
367 seq_printf(m, "\t%16llx",
368 (unsigned long long)(start |
369 (dev->resource[i].flags & PCI_REGION_FLAG_MASK)));
370 }
371 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
372 resource_size_t start, end;
373 pci_resource_to_user(dev, i, &dev->resource[i], &start, &end);
374 seq_printf(m, "\t%16llx",
375 dev->resource[i].start < dev->resource[i].end ?
376 (unsigned long long)(end - start) + 1 : 0);
377 }
378 seq_putc(m, '\t');
379 if (drv)
380 seq_printf(m, "%s", drv->name);
381 seq_putc(m, '\n');
382 return 0;
383}
384
385static const struct seq_operations proc_bus_pci_devices_op = {
386 .start = pci_seq_start,
387 .next = pci_seq_next,
388 .stop = pci_seq_stop,
389 .show = show_device
390};
391
392static struct proc_dir_entry *proc_bus_pci_dir;
393
394int pci_proc_attach_device(struct pci_dev *dev)
395{
396 struct pci_bus *bus = dev->bus;
397 struct proc_dir_entry *e;
398 char name[16];
399
400 if (!proc_initialized)
401 return -EACCES;
402
403 if (!bus->procdir) {
404 if (pci_proc_domain(bus)) {
405 sprintf(name, "%04x:%02x", pci_domain_nr(bus),
406 bus->number);
407 } else {
408 sprintf(name, "%02x", bus->number);
409 }
410 bus->procdir = proc_mkdir(name, proc_bus_pci_dir);
411 if (!bus->procdir)
412 return -ENOMEM;
413 }
414
415 sprintf(name, "%02x.%x", PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
416 e = proc_create_data(name, S_IFREG | S_IRUGO | S_IWUSR, bus->procdir,
417 &proc_bus_pci_operations, dev);
418 if (!e)
419 return -ENOMEM;
420 e->size = dev->cfg_size;
421 dev->procent = e;
422
423 return 0;
424}
425
426int pci_proc_detach_device(struct pci_dev *dev)
427{
428 struct proc_dir_entry *e;
429
430 if ((e = dev->procent)) {
431 remove_proc_entry(e->name, dev->bus->procdir);
432 dev->procent = NULL;
433 }
434 return 0;
435}
436
437#if 0
438int pci_proc_attach_bus(struct pci_bus* bus)
439{
440 struct proc_dir_entry *de = bus->procdir;
441
442 if (!proc_initialized)
443 return -EACCES;
444
445 if (!de) {
446 char name[16];
447 sprintf(name, "%02x", bus->number);
448 de = bus->procdir = proc_mkdir(name, proc_bus_pci_dir);
449 if (!de)
450 return -ENOMEM;
451 }
452 return 0;
453}
454#endif /* 0 */
455
456int pci_proc_detach_bus(struct pci_bus* bus)
457{
458 struct proc_dir_entry *de = bus->procdir;
459 if (de)
460 remove_proc_entry(de->name, proc_bus_pci_dir);
461 return 0;
462}
463
464static int proc_bus_pci_dev_open(struct inode *inode, struct file *file)
465{
466 return seq_open(file, &proc_bus_pci_devices_op);
467}
468static const struct file_operations proc_bus_pci_dev_operations = {
469 .owner = THIS_MODULE,
470 .open = proc_bus_pci_dev_open,
471 .read = seq_read,
472 .llseek = seq_lseek,
473 .release = seq_release,
474};
475
476static int __init pci_proc_init(void)
477{
478 struct pci_dev *dev = NULL;
479 proc_bus_pci_dir = proc_mkdir("bus/pci", NULL);
480 proc_create("devices", 0, proc_bus_pci_dir,
481 &proc_bus_pci_dev_operations);
482 proc_initialized = 1;
483 for_each_pci_dev(dev)
484 pci_proc_attach_device(dev);
485
486 return 0;
487}
488
489device_initcall(pci_proc_init);
490