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
  27 struct chp_link {
  28         struct chp_id chpid;
  29         u32 fla_mask;
  30         u16 fla;
  31 };
  32
  33 static 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
  42 struct 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. */
  57 static inline struct channel_path *chpid_to_chp(struct chp_id chpid)
  58 {
  59         return css_by_id(chpid.cssid)->chps[chpid.id];
  60 }
  61
  62 int chp_get_status(struct chp_id chpid);
  63 u8 chp_get_sch_opm(struct subchannel *sch);
  64 int chp_is_registered(struct chp_id chpid);
  65 struct channel_path_desc_fmt0 *chp_get_chp_desc(struct chp_id chpid);
  66 void chp_remove_cmg_attr(struct channel_path *chp);
  67 int chp_add_cmg_attr(struct channel_path *chp);
  68 int chp_update_desc(struct channel_path *chp);
  69 int chp_new(struct chp_id chpid);
  70 void chp_cfg_schedule(struct chp_id chpid, int configure);
  71 void chp_cfg_cancel_deconfigure(struct chp_id chpid);
  72 int chp_info_get_status(struct chp_id chpid);
  73 int chp_ssd_get_mask(struct chsc_ssd_info *, struct chp_link *);
  74 #endif /* S390_CHP_H */