drivers/s390/cio/chp.h

   1 /*
   2  *  drivers/s390/cio/chp.h
   3  *
   4  *    Copyright IBM Corp. 2007,2010
   5  *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
   6  */
   7
   8 #ifndef S390_CHP_H
   9 #define S390_CHP_H S390_CHP_H
  10
  11 #include <linux/types.h>
  12 #include <linux/device.h>
  13 #include <linux/mutex.h>
  14 #include <asm/chpid.h>
  15 #include "chsc.h"
  16 #include "css.h"
  17
  18 #define CHP_STATUS_STANDBY              0
  19 #define CHP_STATUS_CONFIGURED           1
  20 #define CHP_STATUS_RESERVED             2
  21 #define CHP_STATUS_NOT_RECOGNIZED       3
  22
  23 #define CHP_ONLINE 0
  24 #define CHP_OFFLINE 1
  25 #define CHP_VARY_ON 2
  26 #define CHP_VARY_OFF 3
  27
  28 struct chp_link {
  29         struct chp_id chpid;
  30         u32 fla_mask;
  31         u16 fla;
  32 };
  33
  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 desc;
  49         /* Channel-measurement related stuff: */
  50         int cmg;
  51         int shared;
  52         void *cmg_chars;
  53 };
  54
  55 /* Return channel_path struct for given chpid. */
  56 static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
  57 {
  58         return channel_subsystems[chpid.cssid]->chps[chpid.id];
  59 }
  60
  61 int chp_get_status(struct chp_id chpid);
  62 u8 chp_get_sch_opm(struct subchannel *sch);
  63 int chp_is_registered(struct chp_id chpid);
  64 void *chp_get_chp_desc(struct chp_id chpid);
  65 void chp_remove_cmg_attr(struct channel_path *chp);
  66 int chp_add_cmg_attr(struct channel_path *chp);
  67 int chp_new(struct chp_id chpid);
  68 void chp_cfg_schedule(struct chp_id chpid, int configure);
  69 void chp_cfg_cancel_deconfigure(struct chp_id chpid);
  70 int chp_info_get_status(struct chp_id chpid);
  71 int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
  72 #endif /* S390_CHP_H */