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Peter Oberparleitere6b6e102007-04-27 16:01:28 +02001/*
Heiko Carstensa53c8fa2012-07-20 11:15:04 +02002 * Copyright IBM Corp. 2007, 2010
Peter Oberparleitere6b6e102007-04-27 16:01:28 +02003 * Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
4 */
5
6#ifndef S390_CHP_H
Daniel van Gerpen99ec1112016-05-23 15:19:38 +02007#define S390_CHP_H
Peter Oberparleitere6b6e102007-04-27 16:01:28 +02008
9#include <linux/types.h>
10#include <linux/device.h>
Sebastian Ottb730f3a2010-10-25 16:10:27 +020011#include <linux/mutex.h>
Peter Oberparleitere5854a52007-04-27 16:01:31 +020012#include <asm/chpid.h>
Peter Oberparleitere6b6e102007-04-27 16:01:28 +020013#include "chsc.h"
Cornelia Huck0ae7a7b2008-07-14 09:58:43 +020014#include "css.h"
Peter Oberparleitere6b6e102007-04-27 16:01:28 +020015
Peter Oberparleitere5854a52007-04-27 16:01:31 +020016#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
Cornelia Huckc820de32008-07-14 09:58:45 +020021#define CHP_ONLINE 0
22#define CHP_OFFLINE 1
23#define CHP_VARY_ON 2
24#define CHP_VARY_OFF 3
25
Cornelia Huck99611f82008-07-14 09:59:02 +020026struct chp_link {
Cornelia Huckc820de32008-07-14 09:58:45 +020027 struct chp_id chpid;
28 u32 fla_mask;
29 u16 fla;
30};
31
Peter Oberparleitere5854a52007-04-27 16:01:31 +020032static 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
Peter Oberparleitere6b6e102007-04-27 16:01:28 +020041struct channel_path {
Sebastian Ottb730f3a2010-10-25 16:10:27 +020042 struct device dev;
Peter Oberparleitere6b6e102007-04-27 16:01:28 +020043 struct chp_id chpid;
Sebastian Ottb730f3a2010-10-25 16:10:27 +020044 struct mutex lock; /* Serialize access to below members. */
Peter Oberparleitere6b6e102007-04-27 16:01:28 +020045 int state;
46 struct channel_path_desc desc;
Peter Oberparleitercce0eac2013-03-11 12:58:18 +010047 struct channel_path_desc_fmt1 desc_fmt1;
Peter Oberparleitere6b6e102007-04-27 16:01:28 +020048 /* Channel-measurement related stuff: */
49 int cmg;
50 int shared;
Sebastian Ott0d9bfe92016-01-25 10:30:27 +010051 struct cmg_chars cmg_chars;
Peter Oberparleitere6b6e102007-04-27 16:01:28 +020052};
53
Sebastian Ottc38a90a2010-10-25 16:10:31 +020054/* Return channel_path struct for given chpid. */
55static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
56{
57 return channel_subsystems[chpid.cssid]->chps[chpid.id];
58}
59
Peter Oberparleitere6b6e102007-04-27 16:01:28 +020060int chp_get_status(struct chp_id chpid);
61u8 chp_get_sch_opm(struct subchannel *sch);
62int chp_is_registered(struct chp_id chpid);
Sebastian Ott2bf29df2014-05-07 13:27:21 +020063struct channel_path_desc *chp_get_chp_desc(struct chp_id chpid);
Peter Oberparleitere6b6e102007-04-27 16:01:28 +020064void chp_remove_cmg_attr(struct channel_path *chp);
65int chp_add_cmg_attr(struct channel_path *chp);
Peter Oberparleitercce0eac2013-03-11 12:58:18 +010066int chp_update_desc(struct channel_path *chp);
Peter Oberparleitere6b6e102007-04-27 16:01:28 +020067int chp_new(struct chp_id chpid);
Peter Oberparleitere5854a52007-04-27 16:01:31 +020068void 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);
Cornelia Huck99611f82008-07-14 09:59:02 +020071int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
Peter Oberparleitere6b6e102007-04-27 16:01:28 +020072#endif /* S390_CHP_H */