ntoskernel.h

ndis在linux下的无线网卡驱动源码

NTSTATUS IoPassIrpDown(struct device_object *dev_obj, struct irp *irp) wstdcall;
WIN_FUNC_DECL(IoPassIrpDown,2)
NTSTATUS IoSyncForwardIrp(struct device_object *dev_obj,
			  struct irp *irp) wstdcall;
NTSTATUS IoAsyncForwardIrp(struct device_object *dev_obj,
			   struct irp *irp) wstdcall;
NTSTATUS IoInvalidDeviceRequest(struct device_object *dev_obj,
				struct irp *irp) wstdcall;

KIRQL KeGetCurrentIrql(void) wstdcall;
void KeInitializeSpinLock(NT_SPIN_LOCK *lock) wstdcall;
void KeAcquireSpinLock(NT_SPIN_LOCK *lock, KIRQL *irql) wstdcall;
void KeReleaseSpinLock(NT_SPIN_LOCK *lock, KIRQL oldirql) wstdcall;
KIRQL KeAcquireSpinLockRaiseToDpc(NT_SPIN_LOCK *lock) wstdcall;

void IoAcquireCancelSpinLock(KIRQL *irql) wstdcall;
void IoReleaseCancelSpinLock(KIRQL irql) wstdcall;

void RtlCopyMemory(void *dst, const void *src, SIZE_T length) wstdcall;
NTSTATUS RtlUnicodeStringToAnsiString
	(struct ansi_string *dst, const struct unicode_string *src,
	 BOOLEAN dup) wstdcall;
NTSTATUS RtlAnsiStringToUnicodeString
	(struct unicode_string *dst, const struct ansi_string *src,
	 BOOLEAN dup) wstdcall;
void RtlInitAnsiString(struct ansi_string *dst, const char *src) wstdcall;
void RtlInitString(struct ansi_string *dst, const char *src) wstdcall;
void RtlInitUnicodeString(struct unicode_string *dest,
			  const wchar_t *src) wstdcall;
void RtlFreeUnicodeString(struct unicode_string *string) wstdcall;
void RtlFreeAnsiString(struct ansi_string *string) wstdcall;
LONG RtlCompareUnicodeString(const struct unicode_string *s1,
			     const struct unicode_string *s2,
			     BOOLEAN case_insensitive) wstdcall;
void RtlCopyUnicodeString(struct unicode_string *dst,
			  struct unicode_string *src) wstdcall;
void KeInitializeTimer(struct nt_timer *nt_timer) wstdcall;
void KeInitializeTimerEx(struct nt_timer *nt_timer,
			 enum timer_type type) wstdcall;
BOOLEAN KeSetTimerEx(struct nt_timer *nt_timer, LARGE_INTEGER duetime_ticks,
		     LONG period_ms, struct kdpc *kdpc) wstdcall;
BOOLEAN KeSetTimer(struct nt_timer *nt_timer, LARGE_INTEGER duetime_ticks,
		   struct kdpc *kdpc) wstdcall;
BOOLEAN KeCancelTimer(struct nt_timer *nt_timer) wstdcall;
void KeInitializeDpc(struct kdpc *kdpc, void *func, void *ctx) wstdcall;
struct task_struct *KeGetCurrentThread(void) wstdcall;
NTSTATUS ObReferenceObjectByHandle(void *handle, ACCESS_MASK desired_access,
				   void *obj_type, KPROCESSOR_MODE access_mode,
				   void **object, void *handle_info) wstdcall;

void adjust_user_shared_data_addr(char *driver, unsigned long length);

#define IoCompleteRequest(irp, prio) IofCompleteRequest(irp, prio)
#define IoCallDriver(dev, irp) IofCallDriver(dev, irp)

#if defined(IO_DEBUG)
#define DUMP_IRP(irp)							\
do {									\
	struct io_stack_location *irp_sl;				\
	irp_sl = IoGetCurrentIrpStackLocation(irp);			\
	IOTRACE("irp: %p, stack size: %d, cl: %d, sl: %p, dev_obj: %p, " \
		"mj_fn: %d, minor_fn: %d, nt_urb: %p, event: %p",	\
		irp, irp->stack_count, (irp)->current_location,		\
		irp_sl, irp_sl->dev_obj, irp_sl->major_fn,		\
		irp_sl->minor_fn, IRP_URB(irp),				\
		(irp)->user_event);					\
} while (0)
#else
#define DUMP_IRP(irp) do { } while (0)
#endif

static inline KIRQL current_irql(void)
{
	if (in_irq() || irqs_disabled())
		EXIT6(return DEVICE_LEVEL);
	if (
#ifdef CONFIG_PREEMPT_RT
		in_atomic() ||
#endif
		in_interrupt())
		EXIT6(return DISPATCH_LEVEL);
	EXIT6(return PASSIVE_LEVEL);
}

static inline KIRQL raise_irql(KIRQL newirql)
{
	KIRQL irql = current_irql();
//	assert (newirql == DISPATCH_LEVEL);
	if (irql < DISPATCH_LEVEL && newirql == DISPATCH_LEVEL) {
		local_bh_disable();
		preempt_disable();
	}
	TRACE6("%d, %d", irql, newirql);
	return irql;
}

static inline void lower_irql(KIRQL oldirql)
{
	KIRQL irql = current_irql();
	TRACE6("%d, %d", irql, oldirql);
	DBG_BLOCK(2) {
		if (irql < oldirql)
			ERROR("invalid irql: %d < %d", irql, oldirql);
	}
	if (oldirql < DISPATCH_LEVEL && irql == DISPATCH_LEVEL) {
		preempt_enable();
		local_bh_enable();
	}
}

#define gfp_irql() (current_irql() < DISPATCH_LEVEL ? GFP_KERNEL : GFP_ATOMIC)

/* Windows spinlocks are of type ULONG_PTR which is not big enough to
 * store Linux spinlocks; so we implement Windows spinlocks using
 * ULONG_PTR space with our own functions/macros */

/* Windows seems to use 0 for unlocked state of spinlock - if Linux
 * convention of 1 for unlocked state is used, at least prism54 driver
 * crashes */

#define NT_SPIN_LOCK_UNLOCKED 0
#define NT_SPIN_LOCK_LOCKED 1

static inline void  nt_spin_lock_init(NT_SPIN_LOCK *lock)
{
	*lock = NT_SPIN_LOCK_UNLOCKED;
}

#ifdef CONFIG_SMP

static inline void nt_spin_lock(NT_SPIN_LOCK *lock)
{
	__asm__ __volatile__(
		"\n"
		"1:\t"
		"  xchgl %1, %0\n\t"
		"  cmpl %2, %1\n\t"
		"  je 3f\n"
		"2:\t"
		"  rep; nop\n\t"
		"  cmpl %2, %0\n\t"
		"  jne 2b\n\t"
		"  jmp 1b\n"
		"3:\n\t"
		: "+m" (*lock)
		: "r" (NT_SPIN_LOCK_LOCKED), "i" (NT_SPIN_LOCK_UNLOCKED));
}

static inline void nt_spin_unlock(NT_SPIN_LOCK *lock)
{
	*lock = NT_SPIN_LOCK_UNLOCKED;
}

#else // CONFIG_SMP

#define nt_spin_lock(lock) do { } while (0)

#define nt_spin_unlock(lock)  do { } while (0)

#endif // CONFIG_SMP

/* raise IRQL to given (higher) IRQL if necessary before locking */
static inline KIRQL nt_spin_lock_irql(NT_SPIN_LOCK *lock, KIRQL newirql)
{
	KIRQL oldirql = raise_irql(newirql);
	nt_spin_lock(lock);
	return oldirql;
}

/* lower IRQL to given (lower) IRQL if necessary after unlocking */
static inline void nt_spin_unlock_irql(NT_SPIN_LOCK *lock, KIRQL oldirql)
{
	nt_spin_unlock(lock);
	lower_irql(oldirql);
}

#ifdef CONFIG_PREEMPT_RT
#define save_local_irq(flags) raw_local_irq_save(flags)
#define restore_local_irq(flags) raw_local_irq_restore(flags)
#else
#define save_local_irq(flags) local_irq_save(flags)
#define restore_local_irq(flags) local_irq_restore(flags)
#endif

#define nt_spin_lock_irqsave(lock, flags)				\
do {									\
	save_local_irq(flags);						\
	preempt_disable();						\
	nt_spin_lock(lock);						\
} while (0)

#define nt_spin_unlock_irqrestore(lock, flags)				\
do {									\
	nt_spin_unlock(lock);						\
	restore_local_irq(flags);					\
	preempt_enable();						\
} while (0)

#define atomic_unary_op(var, size, oper)				\
do {									\
	if (size == 1)							\
		__asm__ __volatile__(					\
			LOCK_PREFIX oper "b %b0\n\t" : "+m" (var));	\
	else if (size == 2)						\
		__asm__ __volatile__(					\
			LOCK_PREFIX oper "w %w0\n\t" : "+m" (var));	\
	else if (size == 4)						\
		__asm__ __volatile__(					\
			LOCK_PREFIX oper "l %0\n\t" : "+m" (var));	\
	else if (size == 8)						\
		__asm__ __volatile__(					\
			LOCK_PREFIX oper "q %q0\n\t" : "+m" (var));	\
	else {								\
		extern void _invalid_op_size_(void);			\
		_invalid_op_size_();					\
	}								\
} while (0)

#define atomic_inc_var_size(var, size) atomic_unary_op(var, size, "inc")

#define atomic_inc_var(var) atomic_inc_var_size(var, sizeof(var))

#define atomic_dec_var_size(var, size) atomic_unary_op(var, size, "dec")

#define atomic_dec_var(var) atomic_dec_var_size(var, sizeof(var))

#define pre_atomic_add(var, i)					\
({								\
	typeof(var) pre;					\
	__asm__ __volatile__(					\
		LOCK_PREFIX "xadd %0, %1\n\t"			\
		: "=r"(pre), "+m"(var)				\
		: "0"(i));					\
	pre;							\
})

#define post_atomic_add(var, i) (pre_atomic_add(var, i) + i)

#define atomic_insert_list_head(oldhead, head, newhead)			\
	do {								\
		oldhead = (typeof(oldhead))head;			\
	} while (cmpxchg(&(head), oldhead, newhead) != (typeof(head))oldhead)

#define atomic_remove_list_head(head, newhead)				\
({									\
	typeof(head) oldhead;						\
	do {								\
		oldhead = head;						\
		if (!oldhead)						\
			break;						\
	} while (cmpxchg(&(head), oldhead, newhead) != oldhead);	\
	oldhead;							\
})

static inline ULONG SPAN_PAGES(void *ptr, SIZE_T length)
{
	return PAGE_ALIGN(((unsigned long)ptr & (PAGE_SIZE - 1)) + length)
		>> PAGE_SHIFT;
}

#ifdef CONFIG_X86_64

/* TODO: can these be implemented without using spinlock? */

static inline struct nt_slist *PushEntrySList(nt_slist_header *head,
					      struct nt_slist *entry,
					      NT_SPIN_LOCK *lock)
{
	KIRQL irql = nt_spin_lock_irql(lock, DISPATCH_LEVEL);
	entry->next = head->next;
	head->next = entry;
	head->depth++;
	nt_spin_unlock_irql(lock, irql);
	TRACE4("%p, %p, %p", head, entry, entry->next);
	return entry->next;
}

static inline struct nt_slist *PopEntrySList(nt_slist_header *head,
					     NT_SPIN_LOCK *lock)
{
	struct nt_slist *entry;
	KIRQL irql = nt_spin_lock_irql(lock, DISPATCH_LEVEL);
	entry = head->next;
	if (entry) {
		head->next = entry->next;
		head->depth--;
	}
	nt_spin_unlock_irql(lock, irql);
	TRACE4("%p, %p", head, entry);
	return entry;
}

#else

#define u64_low_32(x) ((u32)x)
#define u64_high_32(x) ((u32)(x >> 32))

static inline u64 cmpxchg8b(volatile u64 *ptr, u64 old, u64 new)
{
	u64 prev;

	__asm__ __volatile__(
		"\n"
		LOCK_PREFIX "cmpxchg8b %0\n"
		: "+m" (*ptr), "=A" (prev)
		: "A" (old), "b" (u64_low_32(new)), "c" (u64_high_32(new)));
	return prev;
}

/* slist routines below update slist atomically - no need for
 * spinlocks */

static inline struct nt_slist *PushEntrySList(nt_slist_header *head,
					      struct nt_slist *entry,
					      NT_SPIN_LOCK *lock)
{
	nt_slist_header old, new;
	do {
		old.align = head->align;
		entry->next = old.next;
		new.next = entry;
		new.depth = old.depth + 1;
	} while (cmpxchg8b(&head->align, old.align, new.align) != old.align);
	TRACE4("%p, %p, %p", head, entry, old.next);
	return old.next;
}

static inline struct nt_slist *PopEntrySList(nt_slist_header *head,
					     NT_SPIN_LOCK *lock)
{
	struct nt_slist *entry;
	nt_slist_header old, new;
	do {
		old.align = head->align;
		entry = old.next;
		if (!entry)
			break;
		new.next = entry->next;
		new.depth = old.depth - 1;
	} while (cmpxchg8b(&head->align, old.align, new.align) != old.align);
	TRACE4("%p, %p", head, entry);
	return entry;
}

#endif

#define sleep_hz(n)					\
do {							\
	set_current_state(TASK_INTERRUPTIBLE);		\
	schedule_timeout(n);				\
} while (0)

#endif // _NTOSKERNEL_H_