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
   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
  26 struct chp_link {
  27         struct chp_id chpid;
  28         u32 fla_mask;
  29         u16 fla;
  30 };
  31
  32 static 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
  41 struct 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         struct cmg_chars cmg_chars;
  52 };
  53
  54 /* Return channel_path struct for given chpid. */
  55 static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
  56 {
  57         return channel_subsystems[chpid.cssid]->chps[chpid.id];
  58 }
  59
  60 int chp_get_status(struct chp_id chpid);
  61 u8 chp_get_sch_opm(struct subchannel *sch);
  62 int chp_is_registered(struct chp_id chpid);
  63 struct channel_path_desc *chp_get_chp_desc(struct chp_id chpid);
  64 void chp_remove_cmg_attr(struct channel_path *chp);
  65 int chp_add_cmg_attr(struct channel_path *chp);
  66 int chp_update_desc(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 */