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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Minios-devel] [UNIKRAFT PATCH 2/6] lib/vfscore: Import device.h from OSv
What is the reason behind adding device.h to vfscore? It looks to me that
it belongs to devfs..
"Vlad-Andrei BĂDOIU (78692)" <vlad_andrei.badoiu@xxxxxxxxxxxxxxx>
writes:
> commit: c8395118cb580f2395cac6c53999feb217fd2c2f
> Signed-off-by: Vlad-Andrei Badoiu <vlad_andrei.badoiu@xxxxxxxxxxxxxxx>
> ---
> lib/vfscore/include/vfscore/device.h | 213 +++++++++++++++++++++++++++
> 1 file changed, 213 insertions(+)
> create mode 100644 lib/vfscore/include/vfscore/device.h
>
> diff --git a/lib/vfscore/include/vfscore/device.h
> b/lib/vfscore/include/vfscore/device.h
> new file mode 100644
> index 00000000..16d2e470
> --- /dev/null
> +++ b/lib/vfscore/include/vfscore/device.h
> @@ -0,0 +1,213 @@
> +/*-
> + * Copyright (c) 2005-2008, Kohsuke Ohtani
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + * notice, this list of conditions and the following disclaimer.
> + * 2. Redistributions in binary form must reproduce the above copyright
> + * notice, this list of conditions and the following disclaimer in the
> + * documentation and/or other materials provided with the distribution.
> + * 3. Neither the name of the author nor the names of any co-contributors
> + * may be used to endorse or promote products derived from this software
> + * without specific prior written permission.
> + *
> + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
> + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
> + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
> + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
> + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
> + * SUCH DAMAGE.
> + */
> +
> +#ifndef _DEVICE_H
> +#define _DEVICE_H
> +
> +#include <sys/cdefs.h>
> +#include <sys/types.h>
> +
> +#include <osv/uio.h>
> +
> +__BEGIN_DECLS
> +
> +#define MAXDEVNAME 12
> +#define DO_RWMASK 0x3
> +
> +struct bio;
> +struct device;
> +
> +/*
> + * Device information
> + */
> +struct devinfo {
> + u_long cookie; /* index cookie */
> + struct device *id; /* device id */
> + int flags; /* device characteristics flags */
> + char name[MAXDEVNAME]; /* device name */
> +};
> +
> +/*
> + * Device flags
> + */
> +#define D_CHR 0x00000001 /* character device */
> +#define D_BLK 0x00000002 /* block device */
> +#define D_REM 0x00000004 /* removable device */
> +#define D_TTY 0x00000010 /* tty device */
> +
> +typedef int (*devop_open_t) (struct device *, int);
> +typedef int (*devop_close_t) (struct device *);
> +typedef int (*devop_read_t) (struct device *, struct uio *, int);
> +typedef int (*devop_write_t) (struct device *, struct uio *, int);
> +typedef int (*devop_ioctl_t) (struct device *, u_long, void *);
> +typedef int (*devop_devctl_t) (struct device *, u_long, void *);
> +typedef void (*devop_strategy_t)(struct bio *);
> +
> +/*
> + * Device operations
> + */
> +struct devops {
> + devop_open_t open;
> + devop_close_t close;
> + devop_read_t read;
> + devop_write_t write;
> + devop_ioctl_t ioctl;
> + devop_devctl_t devctl;
> + devop_strategy_t strategy;
> +};
> +
> +
> +#define no_open ((devop_open_t)nullop)
> +#define no_close ((devop_close_t)nullop)
> +#define no_read ((devop_read_t)enodev)
> +#define no_write ((devop_write_t)enodev)
> +#define no_ioctl ((devop_ioctl_t)enodev)
> +#define no_devctl ((devop_devctl_t)nullop)
> +
> +/*
> + * Driver object
> + */
> +struct driver {
> + const char *name; /* name of device driver */
> + struct devops *devops; /* device operations */
> + size_t devsz; /* size of private data */
> + int flags; /* state of driver */
> +};
> +
> +/*
> + * flags for the driver.
> + */
> +
> +typedef enum device_state {
> + DS_INACTIVE = 0x00, /* driver is inactive */
> + DS_ALIVE = 0x01, /* probe succeded */
> + DS_ACTIVE = 0x02, /* intialized */
> + DS_DEBUG = 0x04, /* debug */
> + DS_NOTPRESENT = 0x08, /* not probed or probe failed */
> + DS_ATTACHING = 0x10, /* currently attaching */
> + DS_ATTACHED = 0x20, /*attach method called */
> +} device_state_t;
> +
> +/*
> + * Device object
> + */
> +struct device {
> + struct device *next; /* linkage on list of all devices */
> + struct driver *driver; /* pointer to the driver object */
> + char name[MAXDEVNAME]; /* name of device */
> + int flags; /* D_* flags defined above */
> + int active; /* device has not been destroyed */
> + int refcnt; /* reference count */
> + off_t size; /* device size */
> + off_t offset; /* 0 for the main drive, if we have a
> partition, this is the start address */
> + size_t max_io_size;
> + void *private_data; /* private storage */
> +
> + void *softc;
> + void *ivars;
> + device_state_t state;
> + const char *desc;
> + int unit;
> + int irq;
> + int vector;
> +};
> +
> +typedef struct device *device_t;
> +
> +static inline int
> +device_set_unit(device_t dev, int unit)
> +{
> + dev->unit = unit;
> + return 0;
> +}
> +
> +static inline int
> +device_get_unit(device_t dev)
> +{
> + return dev->unit;
> +}
> +
> +static inline const char *
> +device_get_desc(device_t dev)
> +{
> + return dev->desc;
> +}
> +
> +static inline void
> +device_set_desc(device_t dev, const char* desc)
> +{
> + dev->desc = desc;
> +}
> +
> +static inline void
> +device_set_softc(device_t dev, void* softc)
> +{
> + dev->softc = softc;
> +}
> +
> +static inline void *
> +device_get_softc(device_t dev)
> +{
> + return dev->softc;
> +}
> +
> +static inline void device_quiet(device_t dev)
> +{
> +}
> +
> +static inline const char *
> +devtoname(struct device *dev)
> +{
> + return dev->name;
> +}
> +
> +int device_open(const char *, int, struct device **);
> +int device_close(struct device *);
> +int device_read(struct device *, struct uio *, int);
> +int device_write(struct device *, struct uio *, int);
> +int device_ioctl(struct device *, u_long, void *);
> +int device_info(struct devinfo *);
> +
> +int bdev_read(struct device *dev, struct uio *uio, int ioflags);
> +int bdev_write(struct device *dev, struct uio *uio, int ioflags);
> +
> +int enodev(void);
> +int nullop(void);
> +void multiplex_strategy(struct bio *);
> +
> +int physio(struct device *dev, struct uio *uio, int ioflags);
> +
> +struct device * device_create(struct driver *drv, const char *name, int
> flags);
> +int device_destroy(struct device *dev);
> +void device_register(struct device *device, const char *name, int flags);
> +void read_partition_table(struct device *device);
> +
> +__END_DECLS
> +
> +#endif /* !_DEVICE_H */
> --
> 2.20.1
>
--
Yuri Volchkov
Software Specialist
NEC Europe Ltd
Kurfürsten-Anlage 36
D-69115 Heidelberg
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