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Implement register and unregister chrdev in the LinuxKPI.

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Obtained from:	kmacy @
MFC after:	1 week
Sponsored by:	Mellanox Technologies
This commit is contained in:
Hans Petter Selasky 2016-12-26 01:18:07 +00:00
parent a1410999f4
commit 1125dbc049
3 changed files with 115 additions and 4 deletions
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6
sys/compat/linuxkpi/common/include/linux/cdev.h
View File

@ -95,7 +95,7 @@ cdev_add(struct linux_cdev *cdev, dev_t dev, unsigned count)
args.mda_gid = 0;
args.mda_mode = 0700;
args.mda_si_drv1 = cdev;
args.mda_unit = MINOR(dev);
args.mda_unit = dev;
error = make_dev_s(&args, &cdev->cdev, "%s",
kobject_name(&cdev->kobj));
@ -121,7 +121,7 @@ cdev_add_ext(struct linux_cdev *cdev, dev_t dev, uid_t uid, gid_t gid, int mode)
args.mda_gid = gid;
args.mda_mode = mode;
args.mda_si_drv1 = cdev;
args.mda_unit = MINOR(dev);
args.mda_unit = dev;
error = make_dev_s(&args, &cdev->cdev, "%s/%d",
kobject_name(&cdev->kobj), MINOR(dev));
@ -142,6 +142,8 @@ cdev_del(struct linux_cdev *cdev)
kobject_put(&cdev->kobj);
}
struct linux_cdev *linux_find_cdev(const char *name, unsigned major, unsigned minor);
#define cdev linux_cdev
#endif /* _LINUX_CDEV_H_ */

37
sys/compat/linuxkpi/common/include/linux/fs.h
View File

@ -2,7 +2,7 @@
* Copyright (c) 2010 Isilon Systems, Inc.
* Copyright (c) 2010 iX Systems, Inc.
* Copyright (c) 2010 Panasas, Inc.
* Copyright (c) 2013 Mellanox Technologies, Ltd.
* Copyright (c) 2013-2016 Mellanox Technologies, Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -151,6 +151,39 @@ struct file_operations {
#define FMODE_WRITE FWRITE
#define FMODE_EXEC FEXEC
int __register_chrdev(unsigned int major, unsigned int baseminor,
unsigned int count, const char *name,
const struct file_operations *fops);
int __register_chrdev_p(unsigned int major, unsigned int baseminor,
unsigned int count, const char *name,
const struct file_operations *fops, uid_t uid,
gid_t gid, int mode);
void __unregister_chrdev(unsigned int major, unsigned int baseminor,
unsigned int count, const char *name);
static inline void
unregister_chrdev(unsigned int major, const char *name)
{
__unregister_chrdev(major, 0, 256, name);
}
static inline int
register_chrdev(unsigned int major, const char *name,
const struct file_operations *fops)
{
return (__register_chrdev(major, 0, 256, name, fops));
}
static inline int
register_chrdev_p(unsigned int major, const char *name,
const struct file_operations *fops, uid_t uid, gid_t gid, int mode)
{
return (__register_chrdev_p(major, 0, 256, name, fops, uid, gid, mode));
}
static inline int
register_chrdev_region(dev_t dev, unsigned range, const char *name)
{
@ -184,7 +217,7 @@ static inline dev_t
iminor(struct inode *inode)
{
return dev2unit(inode->v_rdev);
return (MINOR(dev2unit(inode->v_rdev)));
}
static inline struct inode *

76
sys/compat/linuxkpi/common/src/linux_compat.c
View File

@ -1418,6 +1418,82 @@ linux_irq_handler(void *ent)
irqe->handler(irqe->irq, irqe->arg);
}
struct linux_cdev *
linux_find_cdev(const char *name, unsigned major, unsigned minor)
{
int unit = MKDEV(major, minor);
struct cdev *cdev;
dev_lock();
LIST_FOREACH(cdev, &linuxcdevsw.d_devs, si_list) {
struct linux_cdev *ldev = cdev->si_drv1;
if (dev2unit(cdev) == unit &&
strcmp(kobject_name(&ldev->kobj), name) == 0) {
break;
}
}
dev_unlock();
return (cdev != NULL ? cdev->si_drv1 : NULL);
}
int
__register_chrdev(unsigned int major, unsigned int baseminor,
unsigned int count, const char *name,
const struct file_operations *fops)
{
struct linux_cdev *cdev;
int ret = 0;
int i;
for (i = baseminor; i < baseminor + count; i++) {
cdev = cdev_alloc();
cdev_init(cdev, fops);
kobject_set_name(&cdev->kobj, name);
ret = cdev_add(cdev, makedev(major, i), 1);
if (ret != 0)
break;
}
return (ret);
}
int
__register_chrdev_p(unsigned int major, unsigned int baseminor,
unsigned int count, const char *name,
const struct file_operations *fops, uid_t uid,
gid_t gid, int mode)
{
struct linux_cdev *cdev;
int ret = 0;
int i;
for (i = baseminor; i < baseminor + count; i++) {
cdev = cdev_alloc();
cdev_init(cdev, fops);
kobject_set_name(&cdev->kobj, name);
ret = cdev_add_ext(cdev, makedev(major, i), uid, gid, mode);
if (ret != 0)
break;
}
return (ret);
}
void
__unregister_chrdev(unsigned int major, unsigned int baseminor,
unsigned int count, const char *name)
{
struct linux_cdev *cdevp;
int i;
for (i = baseminor; i < baseminor + count; i++) {
cdevp = linux_find_cdev(name, major, i);
if (cdevp != NULL)
cdev_del(cdevp);
}
}
#if defined(__i386__) || defined(__amd64__)
bool linux_cpu_has_clflush;
#endif