1  /* SPDX-License-Identifier: GPL-2.0 */
2  /*
3   *    Copyright IBM Corp. 2007, 2010
4   *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
5   */
6  
7  #ifndef S390_CHP_H
8  #define S390_CHP_H
9  
10  #include <linux/types.h>
11  #include <linux/device.h>
12  #include <linux/mutex.h>
13  #include <asm/chpid.h>
14  #include "chsc.h"
15  #include "css.h"
16  
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  
22  #define CHP_ONLINE 0
23  #define CHP_OFFLINE 1
24  #define CHP_VARY_ON 2
25  #define CHP_VARY_OFF 3
26  #define CHP_FCES_EVENT 4
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_fmt0 desc;
49  	struct channel_path_desc_fmt1 desc_fmt1;
50  	struct channel_path_desc_fmt3 desc_fmt3;
51  	/* Channel-measurement related stuff: */
52  	int cmg;
53  	int shared;
54  	int extended;
55  	unsigned long speed;
56  	struct cmg_chars cmg_chars;
57  };
58  
59  /* Return channel_path struct for given chpid. */
chpid_to_chp(struct chp_id chpid)60  static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
61  {
62  	return css_by_id(chpid.cssid)->chps[chpid.id];
63  }
64  
65  int chp_get_status(struct chp_id chpid);
66  u8 chp_get_sch_opm(struct subchannel *sch);
67  int chp_is_registered(struct chp_id chpid);
68  struct channel_path_desc_fmt0 *chp_get_chp_desc(struct chp_id chpid);
69  void chp_remove_cmg_attr(struct channel_path *chp);
70  int chp_add_cmg_attr(struct channel_path *chp);
71  int chp_update_desc(struct channel_path *chp);
72  int chp_new(struct chp_id chpid);
73  void chp_cfg_schedule(struct chp_id chpid, int configure);
74  void chp_cfg_cancel_deconfigure(struct chp_id chpid);
75  int chp_info_get_status(struct chp_id chpid);
76  int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
77  #endif /* S390_CHP_H */
78