appldata.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Copyright IBM Corp. 2006
 *
 * Author(s): Melissa Howland <[email protected]>
 */

#ifndef _ASM_S390_APPLDATA_H
#define _ASM_S390_APPLDATA_H

#include <linux/io.h>
#include <asm/machine.h>
#include <asm/diag.h>

#define APPLDATA_START_INTERVAL_REC	0x80
#define APPLDATA_STOP_REC		0x81
#define APPLDATA_GEN_EVENT_REC		0x82
#define APPLDATA_START_CONFIG_REC	0x83

/*
 * Parameter list for DIAGNOSE X'DC'
 */
struct appldata_parameter_list {
	u16 diag;
	u8  function;
	u8  parlist_length;
	u32 unused01;
	u16 reserved;
	u16 buffer_length;
	u32 unused02;
	u64 product_id_addr;
	u64 buffer_addr;
} __attribute__ ((packed));

struct appldata_product_id {
	char prod_nr[7];	/* product number */
	u16  prod_fn;		/* product function */
	u8   record_nr; 	/* record number */
	u16  version_nr;	/* version */
	u16  release_nr;	/* release */
	u16  mod_lvl;		/* modification level */
} __attribute__ ((packed));


static inline int appldata_asm(struct appldata_parameter_list *parm_list,
			       struct appldata_product_id *id,
			       unsigned short fn, void *buffer,
			       unsigned short length)
{
	int ry;

	if (!machine_is_vm())
		return -EOPNOTSUPP;
	parm_list->diag = 0xdc;
	parm_list->function = fn;
	parm_list->parlist_length = sizeof(*parm_list);
	parm_list->buffer_length = length;
	parm_list->product_id_addr = virt_to_phys(id);
	parm_list->buffer_addr = virt_to_phys(buffer);
	diag_stat_inc(DIAG_STAT_X0DC);
	asm volatile(
		"	diag	%1,%0,0xdc"
		: "=d" (ry)
		: "d" (virt_to_phys(parm_list)), "m" (*parm_list), "m" (*id)
		: "cc");
	return ry;
}

#endif /* _ASM_S390_APPLDATA_H */