[Minios-devel] [UNIKRAFT PATCH 2/6] lib/vfscore: Import device.h from OSv

[Vlad-Andrei BĂDOIU (78692) <vlad_andrei.badoiu@xxxxxxxxxxxxxxx>]

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

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