278 lines
8.5 KiB
C
278 lines
8.5 KiB
C
#ifndef SOCKS_DEVICE_H_
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#define SOCKS_DEVICE_H_
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#include <socks/queue.h>
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#include <socks/btree.h>
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#include <socks/status.h>
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#include <socks/bitmap.h>
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#include <socks/object.h>
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#include <socks/fb.h>
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#include <socks/ringbuffer.h>
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struct device;
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struct input_event;
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struct tty_device;
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#define DEV_NAME_MAX OBJECT_NAME_MAX
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#define DEV_MAJOR_MAX 1024
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#define DEV_MINOR_MAX 1024
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#define DEV_MAJOR_INVALID ((unsigned int)0)
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#define DEV_MINOR_INVALID ((unsigned int)0)
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#define INPUT_DEVICE_EVENT_QUEUE_SIZE 128
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#define INPUT_DEVICE_MAX 4096
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#define FRAMEBUFFER_DEVICE_MAX 4096
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#define BLOCK_DEVICE(dev) ((dev)->dev_type == DEV_TYPE_BLOCK ? &(dev)->blk : NULL)
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#define CHAR_DEVICE(dev) ((dev)->dev_type == DEV_TYPE_CHAR ? &(dev)->chr : NULL)
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#define NET_DEVICE(dev) ((dev)->dev_type == DEV_TYPE_NET ? &(dev)->net : NULL)
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#define INPUT_DEVICE(dev) ((dev)->dev_type == DEV_TYPE_INPUT ? &(dev)->input : NULL)
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#define BUS_DEVICE(dev) ((dev)->dev_type == DEV_TYPE_BUS ? &(dev)->bus : NULL)
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#define FRAMEBUFFER_DEVICE(dev) ((dev)->dev_type == DEV_TYPE_FRAMEBUFFER ? &(dev)->fb : NULL)
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enum device_type {
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DEV_TYPE_UNKNOWN = 0,
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DEV_TYPE_BLOCK,
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DEV_TYPE_CHAR,
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DEV_TYPE_NET,
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DEV_TYPE_INPUT,
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DEV_TYPE_BUS,
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DEV_TYPE_FRAMEBUFFER,
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};
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struct device_type_ops {
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kern_status_t(*register_device)(struct device *);
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};
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struct block_device_ops {
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kern_status_t(*read_blocks)(struct device *, size_t, size_t *, void *, socks_flags_t);
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kern_status_t(*write_blocks)(struct device *, size_t, size_t *, const void *, socks_flags_t);
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kern_status_t(*ioctl)(struct device *, unsigned int, void *);
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};
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struct net_device_ops {
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kern_status_t(*online)(struct device *);
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kern_status_t(*offline)(struct device *);
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kern_status_t(*transmit)(struct device *, const void *, size_t);
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kern_status_t(*ioctl)(struct device *, unsigned int, void *);
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};
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struct char_device_ops {
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kern_status_t(*read)(struct device *, size_t, size_t *, void *, socks_flags_t);
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kern_status_t(*write)(struct device *, size_t, size_t *, const void *, socks_flags_t);
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};
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struct input_device_ops {
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kern_status_t(*ioctl)(struct device *, unsigned int, void *);
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};
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struct bus_device_ops {
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kern_status_t(*scan)(struct device *);
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};
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struct framebuffer_device_ops {
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kern_status_t(*set_varinfo)(struct device *, const struct framebuffer_varinfo *);
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};
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struct block_device {
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struct block_device_ops *b_ops;
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};
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struct char_device {
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struct char_device_ops *c_ops;
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/* only valid for TTY devices */
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struct tty_device *c_tty;
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};
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struct net_device {
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struct net_device_ops *n_ops;
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};
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struct input_device {
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struct input_device_ops *i_ops;
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unsigned int i_id;
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struct ringbuffer i_events;
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};
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struct bus_device {
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struct queue_entry b_buslist;
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struct bus_device_ops *b_ops;
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};
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struct framebuffer_device {
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unsigned int fb_id;
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struct framebuffer_device_ops *fb_ops;
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struct framebuffer_varinfo fb_varinfo;
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struct framebuffer_fixedinfo fb_fixedinfo;
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};
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struct device {
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struct object dev_base;
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unsigned int dev_minor;
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enum device_type dev_type;
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struct device *dev_parent;
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struct driver *dev_owner;
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struct queue dev_children;
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struct queue_entry dev_childent;
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struct btree_node dev_driverent;
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char dev_name[DEV_NAME_MAX];
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void *dev_bus_priv;
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void *dev_priv;
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union {
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struct block_device blk;
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struct char_device chr;
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struct net_device net;
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struct input_device input;
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struct bus_device bus;
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struct framebuffer_device fb;
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};
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};
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struct driver;
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struct driver_ops {
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/* called when a bus driver finds a device for this driver to manage. */
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kern_status_t(*bind)(struct driver *, struct device *, struct device *);
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/* called when driver is registered. */
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kern_status_t(*install)(struct driver *);
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/* called when driver is unregistered. */
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kern_status_t(*uninstall)(struct driver *);
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};
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struct driver {
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struct kext *drv_owner;
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unsigned int drv_major;
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DECLARE_BITMAP(drv_minors, DEV_MINOR_MAX);
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char drv_name[DEV_NAME_MAX];
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struct btree drv_children;
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struct btree_node drv_ent;
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spin_lock_t drv_lock;
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void *drv_priv;
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struct driver_ops *drv_ops;
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};
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extern kern_status_t device_init(void);
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extern struct device *root_device(void);
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extern struct device *misc_device(void);
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extern struct device *device_alloc(void);
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static inline void device_lock(struct device *dev)
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{
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object_lock(&dev->dev_base);
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}
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static inline void device_unlock(struct device *dev)
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{
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object_unlock(&dev->dev_base);
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}
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static inline void device_lock_irqsave(struct device *dev, unsigned long *flags)
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{
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object_lock_irqsave(&dev->dev_base, flags);
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}
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static inline void device_unlock_irqrestore(struct device *dev, unsigned long flags)
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{
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object_unlock_irqrestore(&dev->dev_base, flags);
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}
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extern kern_status_t device_read(struct device *dev, void *buf, size_t size, size_t *bytes_read, socks_flags_t flags);
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extern kern_status_t device_write(struct device *dev, const void *buf, size_t size, size_t *bytes_written, socks_flags_t flags);
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extern struct device *cast_to_device(struct object *obj);
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extern struct device *generic_device_create(void);
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extern struct char_device *char_device_create(void);
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extern struct block_device *block_device_create(void);
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extern struct net_device *net_device_create(void);
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extern struct input_device *input_device_create(void);
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extern struct bus_device *bus_device_create(void);
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extern struct framebuffer_device *framebuffer_device_create(void);
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extern struct char_device *char_device_from_generic(struct device *dev);
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extern struct block_device *block_device_from_generic(struct device *dev);
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extern struct net_device *net_device_from_generic(struct device *dev);
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extern struct input_device *input_device_from_generic(struct device *dev);
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extern struct bus_device *bus_device_from_generic(struct device *dev);
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extern struct framebuffer_device *framebuffer_device_from_generic(struct device *dev);
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static inline struct device *char_device_base(struct char_device *dev)
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{
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return (struct device *)((char *)dev - offsetof(struct device, chr));
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}
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static inline struct device *block_device_base(struct block_device *dev)
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{
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return (struct device *)((char *)dev - offsetof(struct device, blk));
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}
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static inline struct device *net_device_base(struct net_device *dev)
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{
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return (struct device *)((char *)dev - offsetof(struct device, net));
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}
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static inline struct device *input_device_base(struct input_device *dev)
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{
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return (struct device *)((char *)dev - offsetof(struct device, input));
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}
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static inline struct device *bus_device_base(struct bus_device *dev)
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{
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return (struct device *)((char *)dev - offsetof(struct device, bus));
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}
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static inline struct device *framebuffer_device_base(struct framebuffer_device *dev)
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{
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return (struct device *)((char *)dev - offsetof(struct device, fb));
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}
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extern kern_status_t device_register(struct device *dev, struct driver *owner, struct device *parent);
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extern kern_status_t input_device_report_event(struct input_device *dev, const struct input_event *ev, bool noblock);
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extern kern_status_t input_device_read(struct device *dev, void *buf, size_t size, size_t *bytes_read, socks_flags_t flags);
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extern struct driver *driver_create(struct kext *self, const char *name);
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extern kern_status_t driver_destroy(struct driver *driver);
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extern kern_status_t driver_init(struct driver *driver, struct kext *self, const char *name);
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extern kern_status_t driver_deinit(struct driver *driver);
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extern kern_status_t driver_register(struct driver *driver);
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extern kern_status_t driver_unregister(struct driver *driver);
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extern unsigned int driver_alloc_minor(struct driver *driver);
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extern void driver_free_minor(struct driver *driver, unsigned int minor);
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extern struct device *driver_get_device(struct driver *driver, unsigned int minor);
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extern kern_status_t driver_add_device(struct driver *driver, struct device *dev);
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extern kern_status_t driver_remove_device(struct driver *driver, struct device *dev);
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extern struct driver *system_driver(void);
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extern kern_status_t framebuffer_get_fixedinfo(struct device *dev, struct framebuffer_fixedinfo *out);
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extern kern_status_t framebuffer_get_varinfo(struct device *dev, struct framebuffer_varinfo *out);
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extern kern_status_t framebuffer_set_varinfo(struct device *dev, const struct framebuffer_varinfo *varinfo);
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static inline void driver_lock(struct driver *driver)
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{
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spin_lock(&driver->drv_lock);
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}
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static inline void driver_unlock(struct driver *driver)
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{
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spin_unlock(&driver->drv_lock);
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}
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static inline void driver_lock_irqsave(struct driver *driver, unsigned long *flags)
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{
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spin_lock_irqsave(&driver->drv_lock, flags);
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}
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static inline void driver_unlock_irqrestore(struct driver *driver, unsigned long flags)
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{
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spin_unlock_irqrestore(&driver->drv_lock, flags);
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}
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extern kern_status_t scan_all_buses(void);
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#endif
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