0x10000040
     ˆÀÈƒ­µ¿ÆÅ Ú    /* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) 2013-2014 Linaro Ltd.
 * Author: Jassi Brar <jassisinghbrar@gmail.com>
 */

#ifndef __MAILBOX_CLIENT_H
#define __MAILBOX_CLIENT_H

#include <linux/of.h>
#include <linux/device.h>

struct mbox_chan;

/**
 * struct mbox_client - User of a mailbox
 * @dev:		The client device
 * @tx_block:		If the mbox_send_message should block until data is
 *			transmitted.
 * @tx_tout:		Max block period in ms before TX is assumed failure
 * @knows_txdone:	If the client could run the TX state machine. Usually
 *			if the client receives some ACK packet for transmission.
 *			Unused if the controller already has TX_Done/RTR IRQ.
 * @rx_callback:	Atomic callback to provide client the data received
 * @tx_prepare: 	Atomic callback to ask client to prepare the payload
 *			before initiating the transmission if required.
 * @tx_done:		Atomic callback to tell client of data transmission
 */
struct mbox_client {
	struct device *dev;
	bool tx_block;
	unsigned long tx_tout;
	bool knows_txdone;

	void (*rx_callback)(struct mbox_client *cl, void *mssg);
	void (*tx_prepare)(struct mbox_client *cl, void *mssg);
	void (*tx_done)(struct mbox_client *cl, void *mssg, int r);
};

struct mbox_chan *mbox_request_channel_byname(struct mbox_client *cl,
					      const char *name);
struct mbox_chan *mbox_request_channel(struct mbox_client *cl, int index);
int mbox_send_message(struct mbox_chan *chan, void *mssg);
int mbox_flush(struct mbox_chan *chan, unsigned long timeout);
void mbox_client_txdone(struct mbox_chan *chan, int r); /* atomic */
bool mbox_client_peek_data(struct mbox_chan *chan); /* atomic */
void mbox_free_channel(struct mbox_chan *chan); /* may sleep */

#endif /* __MAILBOX_CLIENT_H */
  $   ˆÀÈ„yï¿a–Ým_J*j"Tâ€~ãM\ ”Å£Æ *ì    /* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_MINMAX_H
#define _LINUX_MINMAX_H

#include <linux/build_bug.h>
#include <linux/compiler.h>
#include <linux/const.h>
#include <linux/types.h>

/*
 * min()/max()/clamp() macros must accomplish three things:
 *
 * - Avoid multiple evaluations of the arguments (so side-effects like
 *   "x++" happen only once) when non-constant.
 * - Retain result as a constant expressions when called with only
 *   constant expressions (to avoid tripping VLA warnings in stack
 *   allocation usage).
 * - Perform signed v unsigned type-checking (to generate compile
 *   errors instead of nasty runtime surprises).
 * - Unsigned char/short are always promoted to signed int and can be
 *   compared against signed or unsigned arguments.
 * - Unsigned arguments can be compared against non-negative signed constants.
 * - Comparison of a signed argument against an unsigned constant fails
 *   even if the constant is below __INT_MAX__ and could be cast to int.
 */
#define __typecheck(x, y) \
	(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))

/*
 * __sign_use for integer expressions:
 *   bit #0 set if ok for unsigned comparisons
 *   bit #1 set if ok for signed comparisons
 *
 * In particular, statically non-negative signed integer
 * expressions are ok for both.
 *
 * NOTE! Unsigned types smaller than 'int' are implicitly
 * converted to 'int' in expressions, and are accepted for
 * signed conversions for now. This is debatable.
 *
 * Note that 'x' is the original expression, and 'ux' is
 * the unique variable that contains the value.
 *
 * We use 'ux' for pure type checking, and 'x' for when
 * we need to look at the value (but without evaluating
 * it for side effects! Careful to only ever evaluate it
 * with sizeof() or __builtin_constant_p() etc).
 *
 * Pointers end up being checked by the normal C type
 * rules at the actual comparison, and these expressions
 * only need to be careful to not cause warnings for
 * pointer use.
 */
#define __signed_type_use(x,ux) (2+__is_nonneg(x,ux))
#define __unsigned_type_use(x,ux) (1+2*(sizeof(ux)<4))
#define __sign_use(x,ux) (is_signed_type(typeof(ux))? \
	__signed_type_use(x,ux):__unsigned_type_use(x,ux))

/*
 * To avoid warnings about castin