#include <lunaix/ds/ldga.h>
#include <lunaix/ds/llist.h>
#include <lunaix/ds/mutex.h>
+#include <lunaix/iopoll.h>
#include <lunaix/types.h>
#include <usr/lunaix/device.h>
/**
- * @brief Export a device definition
+ * @brief Export a device definition (i.e., device driver metadata)
*
*/
#define EXPORT_DEVICE(id, devdef, load_order) \
export_ldga_el(devdefs, id, ptr_t, devdef); \
export_ldga_el_sfx(devdefs, id##_ldorder, ptr_t, devdef, load_order);
+/**
+ * @brief Mark the device definition can be loaded on demand, all other loading
+ * options are extended from this
+ */
#define load_on_demand ld_ondemand
-#define load_pci_probe ld_ondemand
/**
- * @brief Mark the device definition should be loaded automatically as earlier
- * as possible in the kernel bootstrapping stage (before initialization of file
- * systems). Load here if your driver is standalone and require no other than
- * basic memory allocation services
+ * @brief Mark the device definition to be loaded as system configuration
+ * device. These kind of devices are defined to be the devices that talk to the
+ * system firmware to do config, or collecting crucial information about the
+ * system. For instances, ACPI, SoC components, and other **interconnection**
+ * buese (not USB!). Such device driver must only rely on basic memory
+ * management service, and must not try accessing subsystems other than the mm
+ * unit, for example, timer, interrupt, file-system, must not assumed exist.
*
*/
-#define load_earlystage ld_early
+#define load_sysconf ld_sysconf
+
+/**
+ * @brief Mark the device definition should be loaded as time device, for
+ * example a real time clock device. Such device will be loaded and managed by
+ * clock subsystem
+ */
+#define load_timedev ld_timedev
/**
- * @brief Mark the device definition should be loaded automatically after timer
- * is ready. Load here if your driver require a basic timing service
+ * @brief Mark the device definition should be loaded automatically during the
+ * bootstrapping stage. Most of the driver do load there.
*
*/
-#define load_timerstage ld_aftertimer
+#define load_onboot ld_kboot
/**
* @brief Mark the device definition should be loaded automatically in
- * the post boostrapping stage (i.e., the start up of proc0). Load here if your
- * driver involves async mechanism
+ * the post boostrapping stage (i.e., the start up of proc0), where most of
+ * kernel sub-system are became ready to use. Do your load there if your driver
+ * depends on such condition
*
*/
-#define load_poststage ld_post
+#define load_postboot ld_post
+
+#define __foreach_exported_device_of(stage, index, pos) \
+ ldga_foreach(dev_##stage, struct device_def*, index, pos)
+#define foreach_exported_device_of(stage, index, pos) \
+ __foreach_exported_device_of(stage, index, pos)
/**
* @brief Declare a device class
.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 capability_meta
+{
+ struct llist_header caps;
+ unsigned int cap_type;
+};
+
+#define CAPABILITY_META \
+ union { \
+ struct capability_meta cap_meta; \
+ struct { \
+ struct llist_header caps; \
+ unsigned int cap_type; \
+ }; \
+ }
+
+#define get_capability(cap, cap_type) \
+ container_of((cap), cap_type, cap_meta)
+#define cap_meta(cap) (&(cap)->cap_meta)
+
+typedef struct llist_header capability_list_t;
+
+
+struct device_meta
{
u32_t magic;
struct llist_header siblings;
struct llist_header children;
- struct device* parent;
- mutex_t lock;
+ struct device_meta* parent;
+ struct hstr name;
+
+ u32_t dev_uid;
+
+ char name_val[DEVICE_NAME_SIZE];
+};
- // TODO investigate event polling
+#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 hstr name;
- struct devident ident;
+struct device_cat {
+ DEVICE_METADATA;
+};
+
+struct device
+{
+ /* -- device structing -- */
+
+ DEVICE_METADATA;
+
+ capability_list_t capabilities;
+
+ /* -- device state -- */
+
+ mutex_t lock;
- u32_t dev_uid;
int dev_type;
- char name_val[DEVICE_NAME_SIZE];
+ struct devident ident;
void* underlay;
+ /* -- polling -- */
+ int poll_evflags;
+ poll_evt_q pollers;
+
struct
{
// TODO Think about where will they fit.
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 (*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;
};
struct devclass class;
+ /**
+ * @brief Called when the driver is required to initialize itself.
+ *
+ */
int (*init)(struct device_def*);
+
+ /**
+ * @brief Called when the driver is required to bind with a device. This is
+ * the case for a real-hardware-oriented driver
+ *
+ */
int (*bind)(struct device_def*, struct device*);
+
+ /**
+ * @brief Called when a driver is requested to detach from the device and
+ * free up all it's resources
+ *
+ */
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*
-device_getbyname(struct device* root_dev, const char* name, size_t len);
+struct device_meta*
+device_getbyhname(struct device_meta* root_dev, struct hstr* name);
-struct device*
-device_getbyoffset(struct device* root_dev, int pos);
+struct device_meta*
+device_getbyname(struct device_meta* root_dev, const char* name, size_t len);
-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);
void
device_scan_drivers();
+/*------ Capability ------*/
+
+struct capability_meta*
+alloc_capability(int cap, unsigned int size);
+
+#define new_capability(cap_type, cap_impl)\
+ ((cap_impl*)alloc_capability((cap_type), sizeof(cap_impl)))
+
+#define new_capability_marker(cap_type)\
+ (alloc_capability((cap_type), sizeof(struct capability_meta)))
+
+void
+device_grant_capability(struct device* dev, struct capability_meta* cap);
+
+struct capability_meta*
+device_get_capability(struct device* dev, unsigned int cap_type);
/*------ Load hooks ------*/
void
-device_earlystage();
+device_onboot_load();
void
-device_poststage();
+device_postboot_load();
void
-device_timerstage();
+device_sysconf_load();
static inline void
device_lock(struct device* dev)
git://scm.lunaixsky.com / lunaix-os.git / blobdiff