LXR linux/drivers/s390/cio/chp.h

   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
  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_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        struct cmg_chars cmg_chars;
  55};
  56
  57/* Return channel_path struct for given chpid. */
  58static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
  59{
  60        return css_by_id(chpid.cssid)->chps[chpid.id];
  61}
  62
  63int chp_get_status(struct chp_id chpid);
  64u8 chp_get_sch_opm(struct subchannel *sch);
  65int chp_is_registered(struct chp_id chpid);
  66struct channel_path_desc_fmt0 *chp_get_chp_desc(struct chp_id chpid);
  67void chp_remove_cmg_attr(struct channel_path *chp);
  68int chp_add_cmg_attr(struct channel_path *chp);
  69int chp_update_desc(struct channel_path *chp);
  70int chp_new(struct chp_id chpid);
  71void chp_cfg_schedule(struct chp_id chpid, int configure);
  72void chp_cfg_cancel_deconfigure(struct chp_id chpid);
  73int chp_info_get_status(struct chp_id chpid);
  74int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
  75#endif /* S390_CHP_H */
  76