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
  27struct chp_link {
  28        struct chp_id chpid;
  29        u32 fla_mask;
  30        u16 fla;
  31};
  32
  33static inline int chp_test_bit(u8 *bitmap, int num)
  34{
  35        int byte = num >> 3;
  36        int mask = 128 >> (num & 7);
  37
  38        return (bitmap[byte] & mask) ? 1 : 0;
  39}
  40
  41
  42struct channel_path {
  43        struct device dev;
  44        struct chp_id chpid;
  45        struct mutex lock; /* Serialize access to below members. */
  46        int state;
  47        struct channel_path_desc_fmt0 desc;
  48        struct channel_path_desc_fmt1 desc_fmt1;
  49        struct channel_path_desc_fmt3 desc_fmt3;
  50        /* Channel-measurement related stuff: */
  51        int cmg;
  52        int shared;
  53        struct cmg_chars cmg_chars;
  54};
  55
  56/* Return channel_path struct for given chpid. */
  57static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
  58{
  59        return css_by_id(chpid.cssid)->chps[chpid.id];
  60}
  61
  62int chp_get_status(struct chp_id chpid);
  63u8 chp_get_sch_opm(struct subchannel *sch);
  64int chp_is_registered(struct chp_id chpid);
  65struct channel_path_desc_fmt0 *chp_get_chp_desc(struct chp_id chpid);
  66void chp_remove_cmg_attr(struct channel_path *chp);
  67int chp_add_cmg_attr(struct channel_path *chp);
  68int chp_update_desc(struct channel_path *chp);
  69int chp_new(struct chp_id chpid);
  70void chp_cfg_schedule(struct chp_id chpid, int configure);
  71void chp_cfg_cancel_deconfigure(struct chp_id chpid);
  72int chp_info_get_status(struct chp_id chpid);
  73int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
  74#endif /* S390_CHP_H */
  75