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

   1/*
   2 *    Copyright IBM Corp. 2007, 2010
   3 *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
   4 */
   5
   6#ifndef S390_CHP_H
   7#define S390_CHP_H S390_CHP_H
   8
   9#include <linux/types.h>
  10#include <linux/device.h>
  11#include <linux/mutex.h>
  12#include <asm/chpid.h>
  13#include "chsc.h"
  14#include "css.h"
  15
  16#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
  21#define CHP_ONLINE 0
  22#define CHP_OFFLINE 1
  23#define CHP_VARY_ON 2
  24#define CHP_VARY_OFF 3
  25
  26struct chp_link {
  27        struct chp_id chpid;
  28        u32 fla_mask;
  29        u16 fla;
  30};
  31
  32static 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
  41struct channel_path {
  42        struct device dev;
  43        struct chp_id chpid;
  44        struct mutex lock; /* Serialize access to below members. */
  45        int state;
  46        struct channel_path_desc desc;
  47        struct channel_path_desc_fmt1 desc_fmt1;
  48        /* Channel-measurement related stuff: */
  49        int cmg;
  50        int shared;
  51        void *cmg_chars;
  52};
  53
  54/* 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
  60int chp_get_status(struct chp_id chpid);
  61u8 chp_get_sch_opm(struct subchannel *sch);
  62int chp_is_registered(struct chp_id chpid);
  63void *chp_get_chp_desc(struct chp_id chpid);
  64void chp_remove_cmg_attr(struct channel_path *chp);
  65int chp_add_cmg_attr(struct channel_path *chp);
  66int chp_update_desc(struct channel_path *chp);
  67int chp_new(struct chp_id chpid);
  68void 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);
  71int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
  72#endif /* S390_CHP_H */
  73