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1/*
2 * drivers/s390/cio/chp.h
3 *
4 * Copyright IBM Corp. 2007,2010
5 * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
6 */
7
8#ifndef S390_CHP_H
9#define S390_CHP_H S390_CHP_H
10
11#include <linux/types.h>
12#include <linux/device.h>
13#include <linux/mutex.h>
14#include <asm/chpid.h>
15#include "chsc.h"
16#include "css.h"
17
18#define CHP_STATUS_STANDBY 0
19#define CHP_STATUS_CONFIGURED 1
20#define CHP_STATUS_RESERVED 2
21#define CHP_STATUS_NOT_RECOGNIZED 3
22
23#define CHP_ONLINE 0
24#define CHP_OFFLINE 1
25#define CHP_VARY_ON 2
26#define CHP_VARY_OFF 3
27
28struct chp_link {
29 struct chp_id chpid;
30 u32 fla_mask;
31 u16 fla;
32};
33
34static inline int chp_test_bit(u8 *bitmap, int num)
35{
36 int byte = num >> 3;
37 int mask = 128 >> (num & 7);
38
39 return (bitmap[byte] & mask) ? 1 : 0;
40}
41
42
43struct channel_path {
44 struct device dev;
45 struct chp_id chpid;
46 struct mutex lock; /* Serialize access to below members. */
47 int state;
48 struct channel_path_desc desc;
49 /* Channel-measurement related stuff: */
50 int cmg;
51 int shared;
52 void *cmg_chars;
53};
54
55/* Return channel_path struct for given chpid. */
56static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
57{
58 return channel_subsystems[chpid.cssid]->chps[chpid.id];
59}
60
61int chp_get_status(struct chp_id chpid);
62u8 chp_get_sch_opm(struct subchannel *sch);
63int chp_is_registered(struct chp_id chpid);
64void *chp_get_chp_desc(struct chp_id chpid);
65void chp_remove_cmg_attr(struct channel_path *chp);
66int chp_add_cmg_attr(struct channel_path *chp);
67int chp_new(struct chp_id chpid);
68void chp_cfg_schedule(struct chp_id chpid, int configure);
69void chp_cfg_cancel_deconfigure(struct chp_id chpid);
70int chp_info_get_status(struct chp_id chpid);
71int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
72#endif /* S390_CHP_H */