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chp.h
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1 /*
2  * Copyright IBM Corp. 2007, 2010
3  * Author(s): Peter Oberparleiter <[email protected]>
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 
26 struct chp_link {
27  struct chp_id chpid;
30 };
31 
32 static 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 
41 struct channel_path {
42  struct device dev;
43  struct chp_id chpid;
44  struct mutex lock; /* Serialize access to below members. */
45  int state;
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. */
54 static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
55 {
56  return channel_subsystems[chpid.cssid]->chps[chpid.id];
57 }
58 
59 int chp_get_status(struct chp_id chpid);
61 int chp_is_registered(struct chp_id chpid);
62 void *chp_get_chp_desc(struct chp_id chpid);
63 void chp_remove_cmg_attr(struct channel_path *chp);
64 int chp_add_cmg_attr(struct channel_path *chp);
65 int chp_new(struct chp_id chpid);
66 void chp_cfg_schedule(struct chp_id chpid, int configure);
68 int chp_info_get_status(struct chp_id chpid);
69 int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
70 #endif /* S390_CHP_H */