chp.h revision a53c8fab3f87c995c30ac226a03af95361243144 
1/*
2 *    Copyright IBM Corp. 2007, 2010
3 *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
4 */
5
6#ifndef S390_CHP_H
7#define S390_CHP_H S390_CHP_H
8
9#include <linux/types.h>
10#include <linux/device.h>
11#include <linux/mutex.h>
12#include <asm/chpid.h>
13#include "chsc.h"
14#include "css.h"
15
16#define CHP_STATUS_STANDBY		0
17#define CHP_STATUS_CONFIGURED		1
18#define CHP_STATUS_RESERVED		2
19#define CHP_STATUS_NOT_RECOGNIZED	3
20
21#define CHP_ONLINE 0
22#define CHP_OFFLINE 1
23#define CHP_VARY_ON 2
24#define CHP_VARY_OFF 3
25
26struct chp_link {
27	struct chp_id chpid;
28	u32 fla_mask;
29	u16 fla;
30};
31
32static inline int chp_test_bit(u8 *bitmap, int num)
33{
34	int byte = num >> 3;
35	int mask = 128 >> (num & 7);
36
37	return (bitmap[byte] & mask) ? 1 : 0;
38}
39
40
41struct channel_path {
42	struct device dev;
43	struct chp_id chpid;
44	struct mutex lock; /* Serialize access to below members. */
45	int state;
46	struct channel_path_desc desc;
47	/* Channel-measurement related stuff: */
48	int cmg;
49	int shared;
50	void *cmg_chars;
51};
52
53/* Return channel_path struct for given chpid. */
54static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
55{
56	return channel_subsystems[chpid.cssid]->chps[chpid.id];
57}
58
59int chp_get_status(struct chp_id chpid);
60u8 chp_get_sch_opm(struct subchannel *sch);
61int chp_is_registered(struct chp_id chpid);
62void *chp_get_chp_desc(struct chp_id chpid);
63void chp_remove_cmg_attr(struct channel_path *chp);
64int chp_add_cmg_attr(struct channel_path *chp);
65int chp_new(struct chp_id chpid);
66void chp_cfg_schedule(struct chp_id chpid, int configure);
67void chp_cfg_cancel_deconfigure(struct chp_id chpid);
68int chp_info_get_status(struct chp_id chpid);
69int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
70#endif /* S390_CHP_H */
71