proc.c (0898782247ae533d1f4e47a06bc5d4870931b284) proc.c (aefcf2f4b58155d27340ba5f9ddbe9513da8286d)
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>
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>
16#include <asm/byteorder.h>
17#include "pci.h"
18
19static int proc_initialized; /* = 0 */
20
21static loff_t proc_bus_pci_lseek(struct file *file, loff_t off, int whence)
22{
23 struct pci_dev *dev = PDE_DATA(file_inode(file));

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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;
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));

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111
112static ssize_t proc_bus_pci_write(struct file *file, const char __user *buf,
113 size_t nbytes, loff_t *ppos)
114{
115 struct inode *ino = file_inode(file);
116 struct pci_dev *dev = PDE_DATA(ino);
117 int pos = *ppos;
118 int size = dev->cfg_size;
118 int cnt;
119 int cnt, ret;
119
120
121 ret = security_locked_down(LOCKDOWN_PCI_ACCESS);
122 if (ret)
123 return ret;
124
120 if (pos >= size)
121 return 0;
122 if (nbytes >= size)
123 nbytes = size;
124 if (pos + nbytes > size)
125 nbytes = size - pos;
126 cnt = nbytes;
127

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191 unsigned long arg)
192{
193 struct pci_dev *dev = PDE_DATA(file_inode(file));
194#ifdef HAVE_PCI_MMAP
195 struct pci_filp_private *fpriv = file->private_data;
196#endif /* HAVE_PCI_MMAP */
197 int ret = 0;
198
125 if (pos >= size)
126 return 0;
127 if (nbytes >= size)
128 nbytes = size;
129 if (pos + nbytes > size)
130 nbytes = size - pos;
131 cnt = nbytes;
132

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196 unsigned long arg)
197{
198 struct pci_dev *dev = PDE_DATA(file_inode(file));
199#ifdef HAVE_PCI_MMAP
200 struct pci_filp_private *fpriv = file->private_data;
201#endif /* HAVE_PCI_MMAP */
202 int ret = 0;
203
204 ret = security_locked_down(LOCKDOWN_PCI_ACCESS);
205 if (ret)
206 return ret;
207
199 switch (cmd) {
200 case PCIIOC_CONTROLLER:
201 ret = pci_domain_nr(dev->bus);
202 break;
203
204#ifdef HAVE_PCI_MMAP
205 case PCIIOC_MMAP_IS_IO:
206 if (!arch_can_pci_mmap_io())

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233
234#ifdef HAVE_PCI_MMAP
235static int proc_bus_pci_mmap(struct file *file, struct vm_area_struct *vma)
236{
237 struct pci_dev *dev = PDE_DATA(file_inode(file));
238 struct pci_filp_private *fpriv = file->private_data;
239 int i, ret, write_combine = 0, res_bit = IORESOURCE_MEM;
240
208 switch (cmd) {
209 case PCIIOC_CONTROLLER:
210 ret = pci_domain_nr(dev->bus);
211 break;
212
213#ifdef HAVE_PCI_MMAP
214 case PCIIOC_MMAP_IS_IO:
215 if (!arch_can_pci_mmap_io())

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242
243#ifdef HAVE_PCI_MMAP
244static int proc_bus_pci_mmap(struct file *file, struct vm_area_struct *vma)
245{
246 struct pci_dev *dev = PDE_DATA(file_inode(file));
247 struct pci_filp_private *fpriv = file->private_data;
248 int i, ret, write_combine = 0, res_bit = IORESOURCE_MEM;
249
241 if (!capable(CAP_SYS_RAWIO))
250 if (!capable(CAP_SYS_RAWIO) ||
251 security_locked_down(LOCKDOWN_PCI_ACCESS))
242 return -EPERM;
243
244 if (fpriv->mmap_state == pci_mmap_io) {
245 if (!arch_can_pci_mmap_io())
246 return -EINVAL;
247 res_bit = IORESOURCE_IO;
248 }
249

--- 202 unchanged lines hidden --- 		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

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