arch/s390/include/asm/appldata.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright IBM Corp. 2006
   4  *
   5  * Author(s): Melissa Howland <melissah@us.ibm.com>
   6  */
   7
   8 #ifndef _ASM_S390_APPLDATA_H
   9 #define _ASM_S390_APPLDATA_H
  10
  11 #include <asm/diag.h>
  12 #include <asm/io.h>
  13
  14 #define APPLDATA_START_INTERVAL_REC     0x80
  15 #define APPLDATA_STOP_REC               0x81
  16 #define APPLDATA_GEN_EVENT_REC          0x82
  17 #define APPLDATA_START_CONFIG_REC       0x83
  18
  19 /*
  20  * Parameter list for DIAGNOSE X'DC'
  21  */
  22 struct appldata_parameter_list {
  23         u16 diag;
  24         u8  function;
  25         u8  parlist_length;
  26         u32 unused01;
  27         u16 reserved;
  28         u16 buffer_length;
  29         u32 unused02;
  30         u64 product_id_addr;
  31         u64 buffer_addr;
  32 } __attribute__ ((packed));
  33
  34 struct appldata_product_id {
  35         char prod_nr[7];        /* product number */
  36         u16  prod_fn;           /* product function */
  37         u8   record_nr;         /* record number */
  38         u16  version_nr;        /* version */
  39         u16  release_nr;        /* release */
  40         u16  mod_lvl;           /* modification level */
  41 } __attribute__ ((packed));
  42
  43 static inline int appldata_asm(struct appldata_product_id *id,
  44                                unsigned short fn, void *buffer,
  45                                unsigned short length)
  46 {
  47         struct appldata_parameter_list parm_list;
  48         int ry;
  49
  50         if (!MACHINE_IS_VM)
  51                 return -EOPNOTSUPP;
  52         parm_list.diag = 0xdc;
  53         parm_list.function = fn;
  54         parm_list.parlist_length = sizeof(parm_list);
  55         parm_list.buffer_length = length;
  56         parm_list.product_id_addr = (unsigned long) id;
  57         parm_list.buffer_addr = virt_to_phys(buffer);
  58         diag_stat_inc(DIAG_STAT_X0DC);
  59         asm volatile(
  60                 "       diag    %1,%0,0xdc"
  61                 : "=d" (ry)
  62                 : "d" (&parm_list), "m" (parm_list), "m" (*id)
  63                 : "cc");
  64         return ry;
  65 }
  66
  67 #endif /* _ASM_S390_APPLDATA_H */