aboutsummaryrefslogtreecommitdiff
path: root/drivers/pci/proc.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/pci/proc.c')
-rw-r--r--drivers/pci/proc.c118
1 files changed, 35 insertions, 83 deletions
diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c
index 593bb844b8d..3f155e78513 100644
--- a/drivers/pci/proc.c
+++ b/drivers/pci/proc.c
@@ -6,10 +6,10 @@
#include <linux/init.h>
#include <linux/pci.h>
+#include <linux/slab.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
-#include <linux/smp_lock.h>
#include <linux/capability.h>
#include <asm/uaccess.h>
#include <asm/byteorder.h>
@@ -17,38 +17,16 @@
static int proc_initialized; /* = 0 */
-static loff_t
-proc_bus_pci_lseek(struct file *file, loff_t off, int whence)
+static loff_t proc_bus_pci_lseek(struct file *file, loff_t off, int whence)
{
- loff_t new = -1;
- struct inode *inode = file->f_path.dentry->d_inode;
-
- mutex_lock(&inode->i_mutex);
- switch (whence) {
- case 0:
- new = off;
- break;
- case 1:
- new = file->f_pos + off;
- break;
- case 2:
- new = inode->i_size + off;
- break;
- }
- if (new < 0 || new > inode->i_size)
- new = -EINVAL;
- else
- file->f_pos = new;
- mutex_unlock(&inode->i_mutex);
- return new;
+ struct pci_dev *dev = PDE_DATA(file_inode(file));
+ return fixed_size_llseek(file, off, whence, dev->cfg_size);
}
-static ssize_t
-proc_bus_pci_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos)
+static ssize_t proc_bus_pci_read(struct file *file, char __user *buf,
+ size_t nbytes, loff_t *ppos)
{
- const struct inode *ino = file->f_path.dentry->d_inode;
- const struct proc_dir_entry *dp = PDE(ino);
- struct pci_dev *dev = dp->data;
+ struct pci_dev *dev = PDE_DATA(file_inode(file));
unsigned int pos = *ppos;
unsigned int cnt, size;
@@ -59,7 +37,7 @@ proc_bus_pci_read(struct file *file, char __user *buf, size_t nbytes, loff_t *pp
*/
if (capable(CAP_SYS_ADMIN))
- size = dp->size;
+ size = dev->cfg_size;
else if (dev->hdr_type == PCI_HEADER_TYPE_CARDBUS)
size = 128;
else
@@ -76,6 +54,8 @@ proc_bus_pci_read(struct file *file, char __user *buf, size_t nbytes, loff_t *pp
if (!access_ok(VERIFY_WRITE, buf, cnt))
return -EINVAL;
+ pci_config_pm_runtime_get(dev);
+
if ((pos & 1) && cnt) {
unsigned char val;
pci_user_read_config_byte(dev, pos, &val);
@@ -121,18 +101,19 @@ proc_bus_pci_read(struct file *file, char __user *buf, size_t nbytes, loff_t *pp
cnt--;
}
+ pci_config_pm_runtime_put(dev);
+
*ppos = pos;
return nbytes;
}
-static ssize_t
-proc_bus_pci_write(struct file *file, const char __user *buf, size_t nbytes, loff_t *ppos)
+static ssize_t proc_bus_pci_write(struct file *file, const char __user *buf,
+ size_t nbytes, loff_t *ppos)
{
- struct inode *ino = file->f_path.dentry->d_inode;
- const struct proc_dir_entry *dp = PDE(ino);
- struct pci_dev *dev = dp->data;
+ struct inode *ino = file_inode(file);
+ struct pci_dev *dev = PDE_DATA(ino);
int pos = *ppos;
- int size = dp->size;
+ int size = dev->cfg_size;
int cnt;
if (pos >= size)
@@ -146,6 +127,8 @@ proc_bus_pci_write(struct file *file, const char __user *buf, size_t nbytes, lof
if (!access_ok(VERIFY_READ, buf, cnt))
return -EINVAL;
+ pci_config_pm_runtime_get(dev);
+
if ((pos & 1) && cnt) {
unsigned char val;
__get_user(val, buf);
@@ -191,8 +174,10 @@ proc_bus_pci_write(struct file *file, const char __user *buf, size_t nbytes, lof
cnt--;
}
+ pci_config_pm_runtime_put(dev);
+
*ppos = pos;
- i_size_write(ino, dp->size);
+ i_size_write(ino, dev->cfg_size);
return nbytes;
}
@@ -204,15 +189,12 @@ struct pci_filp_private {
static long proc_bus_pci_ioctl(struct file *file, unsigned int cmd,
unsigned long arg)
{
- const struct proc_dir_entry *dp = PDE(file->f_dentry->d_inode);
- struct pci_dev *dev = dp->data;
+ struct pci_dev *dev = PDE_DATA(file_inode(file));
#ifdef HAVE_PCI_MMAP
struct pci_filp_private *fpriv = file->private_data;
#endif /* HAVE_PCI_MMAP */
int ret = 0;
- lock_kernel();
-
switch (cmd) {
case PCIIOC_CONTROLLER:
ret = pci_domain_nr(dev->bus);
@@ -239,18 +221,15 @@ static long proc_bus_pci_ioctl(struct file *file, unsigned int cmd,
default:
ret = -EINVAL;
break;
- };
+ }
- unlock_kernel();
return ret;
}
#ifdef HAVE_PCI_MMAP
static int proc_bus_pci_mmap(struct file *file, struct vm_area_struct *vma)
{
- struct inode *inode = file->f_path.dentry->d_inode;
- const struct proc_dir_entry *dp = PDE(inode);
- struct pci_dev *dev = dp->data;
+ struct pci_dev *dev = PDE_DATA(file_inode(file));
struct pci_filp_private *fpriv = file->private_data;
int i, ret;
@@ -259,7 +238,7 @@ static int proc_bus_pci_mmap(struct file *file, struct vm_area_struct *vma)
/* Make sure the caller is mapping a real resource for this device */
for (i = 0; i < PCI_ROM_RESOURCE; i++) {
- if (pci_mmap_fits(dev, i, vma))
+ if (pci_mmap_fits(dev, i, vma, PCI_MMAP_PROCFS))
break;
}
@@ -305,6 +284,7 @@ static const struct file_operations proc_bus_pci_operations = {
.read = proc_bus_pci_read,
.write = proc_bus_pci_write,
.unlocked_ioctl = proc_bus_pci_ioctl,
+ .compat_ioctl = proc_bus_pci_ioctl,
#ifdef HAVE_PCI_MMAP
.open = proc_bus_pci_open,
.release = proc_bus_pci_release,
@@ -419,7 +399,7 @@ int pci_proc_attach_device(struct pci_dev *dev)
&proc_bus_pci_operations, dev);
if (!e)
return -ENOMEM;
- e->size = dev->cfg_size;
+ proc_set_size(e, dev->cfg_size);
dev->procent = e;
return 0;
@@ -427,41 +407,14 @@ int pci_proc_attach_device(struct pci_dev *dev)
int pci_proc_detach_device(struct pci_dev *dev)
{
- struct proc_dir_entry *e;
-
- if ((e = dev->procent)) {
- if (atomic_read(&e->count) > 1)
- return -EBUSY;
- remove_proc_entry(e->name, dev->bus->procdir);
- dev->procent = NULL;
- }
- return 0;
-}
-
-#if 0
-int pci_proc_attach_bus(struct pci_bus* bus)
-{
- struct proc_dir_entry *de = bus->procdir;
-
- if (!proc_initialized)
- return -EACCES;
-
- if (!de) {
- char name[16];
- sprintf(name, "%02x", bus->number);
- de = bus->procdir = proc_mkdir(name, proc_bus_pci_dir);
- if (!de)
- return -ENOMEM;
- }
+ proc_remove(dev->procent);
+ dev->procent = NULL;
return 0;
}
-#endif /* 0 */
-int pci_proc_detach_bus(struct pci_bus* bus)
+int pci_proc_detach_bus(struct pci_bus *bus)
{
- struct proc_dir_entry *de = bus->procdir;
- if (de)
- remove_proc_entry(de->name, proc_bus_pci_dir);
+ proc_remove(bus->procdir);
return 0;
}
@@ -469,6 +422,7 @@ static int proc_bus_pci_dev_open(struct inode *inode, struct file *file)
{
return seq_open(file, &proc_bus_pci_devices_op);
}
+
static const struct file_operations proc_bus_pci_dev_operations = {
.owner = THIS_MODULE,
.open = proc_bus_pci_dev_open,
@@ -484,11 +438,9 @@ static int __init pci_proc_init(void)
proc_create("devices", 0, proc_bus_pci_dir,
&proc_bus_pci_dev_operations);
proc_initialized = 1;
- while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
+ for_each_pci_dev(dev)
pci_proc_attach_device(dev);
- }
+
return 0;
}
-
device_initcall(pci_proc_init);
-
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 06:46:45 +0000