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 
28 struct chp_link {
29 	struct chp_id chpid;
30 	u32 fla_mask;
31 	u16 fla;
32 };
33 
chp_test_bit(u8 * bitmap,int num)34 static 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 
43 struct 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. */
chpid_to_chp(struct chp_id chpid)56 static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
57 {
58 	return channel_subsystems[chpid.cssid]->chps[chpid.id];
59 }
60 
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);
64 void *chp_get_chp_desc(struct chp_id chpid);
65 void chp_remove_cmg_attr(struct channel_path *chp);
66 int chp_add_cmg_attr(struct channel_path *chp);
67 int chp_new(struct chp_id chpid);
68 void chp_cfg_schedule(struct chp_id chpid, int configure);
69 void chp_cfg_cancel_deconfigure(struct chp_id chpid);
70 int chp_info_get_status(struct chp_id chpid);
71 int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
72 #endif /* S390_CHP_H */
73