.variant = (devvar) \
}
-#define DEV_STRUCT_MAGIC 0x5645444c
+#define DEV_STRUCT_MAGIC_MASK 0x56454440U
+#define DEV_STRUCT 0xc
+#define DEV_CAT 0xd
+#define DEV_ALIAS 0xf
+
+#define DEV_STRUCT_MAGIC (DEV_STRUCT_MAGIC_MASK | DEV_STRUCT)
+#define DEV_CAT_MAGIC (DEV_STRUCT_MAGIC_MASK | DEV_CAT)
+#define DEV_ALIAS_MAGIC (DEV_STRUCT_MAGIC_MASK | DEV_ALIAS)
#define DEV_MSKIF 0x00000003
#define DEV_IFVOL 0x0 // volumetric (block) device
#define DEV_IFSEQ 0x1 // sequential (character) device
-#define DEV_IFCAT 0x2 // a device category (as device groupping)
#define DEV_IFSYS 0x3 // a system device
-struct device
+struct device_meta
{
- /* -- device structing -- */
-
u32_t magic;
struct llist_header siblings;
struct llist_header children;
- struct device* parent;
+ struct device_meta* parent;
+ struct hstr name;
+
+ u32_t dev_uid;
+
+ char name_val[DEVICE_NAME_SIZE];
+};
+
+#define DEVICE_METADATA \
+ union { \
+ struct device_meta meta; \
+ struct { \
+ u32_t magic; \
+ struct llist_header siblings; \
+ struct llist_header children; \
+ struct device_meta* parent; \
+ struct hstr name; \
+ \
+ u32_t dev_uid; \
+ \
+ char name_val[DEVICE_NAME_SIZE]; \
+ }; \
+ }
+
+#define dev_meta(dev) (&(dev)->meta)
+#define to_dev(dev) (container_of(dev,struct device, meta))
+#define to_catdev(dev) (container_of(dev,struct device_cat, meta))
+#define to_aliasdev(dev) (container_of(dev,struct device_alias, meta))
+
+struct device_alias {
+ DEVICE_METADATA;
+ struct device_meta* alias;
+};
+
+struct device_cat {
+ DEVICE_METADATA;
+};
+
+struct device
+{
+ /* -- device structing -- */
+
+ DEVICE_METADATA;
/* -- device state -- */
mutex_t lock;
- struct hstr name;
- struct devident ident;
-
- u32_t dev_uid;
int dev_type;
- char name_val[DEVICE_NAME_SIZE];
+ struct devident ident;
void* underlay;
/* -- polling -- */
int (*acquire)(struct device* dev);
int (*release)(struct device* dev);
- int (*read)(struct device* dev, void* buf, size_t offset, size_t len);
- int (*write)(struct device* dev, void* buf, size_t offset, size_t len);
- int (*read_page)(struct device* dev, void* buf, size_t offset);
- int (*write_page)(struct device* dev, void* buf, size_t offset);
- int (*exec_cmd)(struct device* dev, u32_t req, va_list args);
- int (*poll)(struct device* dev);
+ int (*read)(struct device*, void*, off_t, size_t);
+ int (*write)(struct device*, void*, off_t, size_t);
+ int (*read_async)(struct device*, void*, off_t, size_t);
+ int (*write_async)(struct device*, void*, off_t, size_t);
+
+ int (*read_page)(struct device*, void*, off_t);
+ int (*write_page)(struct device*, void*, off_t);
+
+ int (*exec_cmd)(struct device*, u32_t, va_list);
+ int (*poll)(struct device*);
} ops;
};
int (*free)(struct device_def*, void* instance);
};
+static inline bool must_inline
+valid_device_ref(void* maybe_dev) {
+ if (!maybe_dev)
+ return false;
+
+ unsigned int magic = ((struct device_meta*)maybe_dev)->magic;
+ return (magic ^ DEV_STRUCT_MAGIC_MASK) <= 0xfU;
+}
+
+static inline bool must_inline
+valid_device_subtype_ref(void* maybe_dev, unsigned int subtype) {
+ if (!maybe_dev)
+ return false;
+
+ unsigned int magic = ((struct device_meta*)maybe_dev)->magic;
+ return (magic ^ DEV_STRUCT_MAGIC_MASK) == subtype;
+}
+
+struct device*
+resolve_device(void* maybe_dev);
+
+struct device_meta*
+resolve_device_meta(void* maybe_dev);
+
+#define mark_device_doing_write(dev_ptr) (dev_ptr)->poll_evflags &= ~_POLLOUT
+#define mark_device_done_write(dev_ptr) (dev_ptr)->poll_evflags |= _POLLOUT
+
+#define mark_device_doing_read(dev_ptr) (dev_ptr)->poll_evflags &= ~_POLLIN
+#define mark_device_done_read(dev_ptr) (dev_ptr)->poll_evflags |= _POLLIN
+
+#define mark_device_hanging(dev_ptr) (dev_ptr)->poll_evflags &= ~_POLLHUP
+#define mark_device_grounded(dev_ptr) (dev_ptr)->poll_evflags |= _POLLHUP
+
static inline u32_t
device_id_from_class(struct devclass* class)
{
device_scan_drivers();
void
-device_setname_vargs(struct device* dev, char* fmt, va_list args);
+device_setname_vargs(struct device_meta* dev, char* fmt, va_list args);
void
-device_setname(struct device* dev, char* fmt, ...);
+device_setname(struct device_meta* dev, char* fmt, ...);
void
-device_register(struct device* dev, struct devclass* class, char* fmt, ...);
+device_register_generic(struct device_meta* dev, struct devclass* class, char* fmt, ...);
+
+#define register_device(dev, class, fmt, ...) \
+ device_register_generic(dev_meta(dev), class, fmt, ## __VA_ARGS__)
void
device_create(struct device* dev,
- struct device* parent,
+ struct device_meta* parent,
u32_t type,
void* underlay);
struct device*
-device_alloc(struct device* parent, u32_t type, void* underlay);
+device_alloc(struct device_meta* parent, u32_t type, void* underlay);
-static inline struct device*
-device_allocsys(struct device* parent, void* underlay)
+static inline struct device* must_inline
+device_allocsys(struct device_meta* parent, void* underlay)
{
return device_alloc(parent, DEV_IFSYS, underlay);
}
-static inline struct device*
-device_allocseq(struct device* parent, void* underlay)
+static inline struct device* must_inline
+device_allocseq(struct device_meta* parent, void* underlay)
{
return device_alloc(parent, DEV_IFSEQ, underlay);
}
-static inline struct device*
-device_allocvol(struct device* parent, void* underlay)
+static inline struct device* must_inline
+device_allocvol(struct device_meta* parent, void* underlay)
{
return device_alloc(parent, DEV_IFVOL, underlay);
}
-struct device*
-device_addcat(struct device* parent, char* name_fmt, ...);
+struct device_alias*
+device_addalias(struct device_meta* parent, struct device_meta* aliased, char* name_fmt, ...);
+
+struct device_cat*
+device_addcat(struct device_meta* parent, char* name_fmt, ...);
void
-device_remove(struct device* dev);
+device_remove(struct device_meta* dev);
-struct device*
+struct device_meta*
device_getbyid(struct llist_header* devlist, u32_t id);
-struct device*
-device_getbyhname(struct device* root_dev, struct hstr* name);
+struct device_meta*
+device_getbyhname(struct device_meta* root_dev, struct hstr* name);
-struct device*
-device_getbyname(struct device* root_dev, const char* name, size_t len);
+struct device_meta*
+device_getbyname(struct device_meta* root_dev, const char* name, size_t len);
-struct device*
-device_getbyoffset(struct device* root_dev, int pos);
-
-struct device*
-device_cast(void* obj);
+struct device_meta*
+device_getbyoffset(struct device_meta* root_dev, int pos);
struct hbucket*
device_definitions_byif(int if_type);
/*------ Load hooks ------*/
void
-device_onbooot_load();
+device_onboot_load();
void
device_postboot_load();
git://scm.lunaixsky.com / lunaix-os.git / blobdiff