[linux-2.6-block.git] / drivers / s390 / cio / chp.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 *    Copyright IBM Corp. 2007, 2010
 *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
 */

#ifndef S390_CHP_H
#define S390_CHP_H

#include <linux/types.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <asm/chpid.h>
#include "chsc.h"
#include "css.h"

#define CHP_STATUS_STANDBY		0
#define CHP_STATUS_CONFIGURED		1
#define CHP_STATUS_RESERVED		2
#define CHP_STATUS_NOT_RECOGNIZED	3

#define CHP_ONLINE 0
#define CHP_OFFLINE 1
#define CHP_VARY_ON 2
#define CHP_VARY_OFF 3

struct chp_link {
	struct chp_id chpid;
	u32 fla_mask;
	u16 fla;
};

static inline int chp_test_bit(u8 *bitmap, int num)
{
	int byte = num >> 3;
	int mask = 128 >> (num & 7);

	return (bitmap[byte] & mask) ? 1 : 0;
}


struct channel_path {
	struct device dev;
	struct chp_id chpid;
	struct mutex lock; /* Serialize access to below members. */
	int state;
	struct channel_path_desc desc;
	struct channel_path_desc_fmt1 desc_fmt1;
	/* Channel-measurement related stuff: */
	int cmg;
	int shared;
	struct cmg_chars cmg_chars;
};

/* Return channel_path struct for given chpid. */
static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
{
	return css_by_id(chpid.cssid)->chps[chpid.id];
}

int chp_get_status(struct chp_id chpid);
u8 chp_get_sch_opm(struct subchannel *sch);
int chp_is_registered(struct chp_id chpid);
struct channel_path_desc *chp_get_chp_desc(struct chp_id chpid);
void chp_remove_cmg_attr(struct channel_path *chp);
int chp_add_cmg_attr(struct channel_path *chp);
int chp_update_desc(struct channel_path *chp);
int chp_new(struct chp_id chpid);
void chp_cfg_schedule(struct chp_id chpid, int configure);
void chp_cfg_cancel_deconfigure(struct chp_id chpid);
int chp_info_get_status(struct chp_id chpid);
int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
#endif /* S390_CHP_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
e6b6e10a	2	/*
a53c8fab	3	* Copyright IBM Corp. 2007, 2010
e6b6e10a PO	4	* Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
	5	*/
	6
	7	#ifndef S390_CHP_H
99ec1112	8	#define S390_CHP_H
e6b6e10a PO	9
	10	#include <linux/types.h>
	11	#include <linux/device.h>
b730f3a9	12	#include <linux/mutex.h>
e5854a58	13	#include <asm/chpid.h>
e6b6e10a	14	#include "chsc.h"
0ae7a7b2	15	#include "css.h"
e6b6e10a	16
e5854a58 PO	17	#define CHP_STATUS_STANDBY 0
	18	#define CHP_STATUS_CONFIGURED 1
	19	#define CHP_STATUS_RESERVED 2
	20	#define CHP_STATUS_NOT_RECOGNIZED 3
	21
c820de39 CH	22	#define CHP_ONLINE 0
	23	#define CHP_OFFLINE 1
	24	#define CHP_VARY_ON 2
	25	#define CHP_VARY_OFF 3
	26
99611f87	27	struct chp_link {
c820de39 CH	28	struct chp_id chpid;
	29	u32 fla_mask;
	30	u16 fla;
	31	};
	32
e5854a58 PO	33	static inline int chp_test_bit(u8 *bitmap, int num)
	34	{
	35	int byte = num >> 3;
	36	int mask = 128 >> (num & 7);
	37
	38	return (bitmap[byte] & mask) ? 1 : 0;
	39	}
	40
	41
e6b6e10a	42	struct channel_path {
b730f3a9	43	struct device dev;
e6b6e10a	44	struct chp_id chpid;
b730f3a9	45	struct mutex lock; /* Serialize access to below members. */
e6b6e10a PO	46	int state;
e6b6e10a PO	47	struct channel_path_desc desc;
cce0eacc	48	struct channel_path_desc_fmt1 desc_fmt1;
e6b6e10a PO	49	/* Channel-measurement related stuff: */
	50	int cmg;
	51	int shared;
0d9bfe91	52	struct cmg_chars cmg_chars;
e6b6e10a PO	53	};
e6b6e10a PO	54
c38a90a3 SO	55	/* Return channel_path struct for given chpid. */
	56	static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
	57	{
98cc43ab	58	return css_by_id(chpid.cssid)->chps[chpid.id];
c38a90a3 SO	59	}
c38a90a3 SO	60
e6b6e10a PO	61	int chp_get_status(struct chp_id chpid);
	62	u8 chp_get_sch_opm(struct subchannel *sch);
	63	int chp_is_registered(struct chp_id chpid);
2bf29df7	64	struct channel_path_desc *chp_get_chp_desc(struct chp_id chpid);
e6b6e10a PO	65	void chp_remove_cmg_attr(struct channel_path *chp);
e6b6e10a PO	66	int chp_add_cmg_attr(struct channel_path *chp);
cce0eacc	67	int chp_update_desc(struct channel_path *chp);
e6b6e10a	68	int chp_new(struct chp_id chpid);
e5854a58 PO	69	void chp_cfg_schedule(struct chp_id chpid, int configure);
	70	void chp_cfg_cancel_deconfigure(struct chp_id chpid);
	71	int chp_info_get_status(struct chp_id chpid);
99611f87	72	int chp_ssd_get_mask(struct chsc_ssd_info , struct chp_link );
e6b6e10a	73	#endif /* S390_CHP_H */