drivers/s390/cio/chsc.h

   1 #ifndef S390_CHSC_H
   2 #define S390_CHSC_H
   3
   4 #include <linux/types.h>
   5 #include <linux/device.h>
   6 #include <asm/css_chars.h>
   7 #include <asm/chpid.h>
   8 #include <asm/chsc.h>
   9 #include <asm/schid.h>
  10
  11 #define CHSC_SDA_OC_MSS   0x2
  12
  13 struct chsc_header {
  14         u16 length;
  15         u16 code;
  16 } __attribute__ ((packed));
  17
  18 #define NR_MEASUREMENT_CHARS 5
  19 struct cmg_chars {
  20         u32 values[NR_MEASUREMENT_CHARS];
  21 } __attribute__ ((packed));
  22
  23 #define NR_MEASUREMENT_ENTRIES 8
  24 struct cmg_entry {
  25         u32 values[NR_MEASUREMENT_ENTRIES];
  26 } __attribute__ ((packed));
  27
  28 struct channel_path_desc {
  29         u8 flags;
  30         u8 lsn;
  31         u8 desc;
  32         u8 chpid;
  33         u8 swla;
  34         u8 zeroes;
  35         u8 chla;
  36         u8 chpp;
  37 } __attribute__ ((packed));
  38
  39 struct channel_path_desc_fmt1 {
  40         u8 flags;
  41         u8 lsn;
  42         u8 desc;
  43         u8 chpid;
  44         u32:24;
  45         u8 chpp;
  46         u32 unused[2];
  47         u16 chid;
  48         u32:16;
  49         u16 mdc;
  50         u16:13;
  51         u8 r:1;
  52         u8 s:1;
  53         u8 f:1;
  54         u32 zeros[2];
  55 } __attribute__ ((packed));
  56
  57 struct channel_path;
  58
  59 struct css_chsc_char {
  60         u64 res;
  61         u64 : 20;
  62         u32 secm : 1; /* bit 84 */
  63         u32 : 1;
  64         u32 scmc : 1; /* bit 86 */
  65         u32 : 20;
  66         u32 scssc : 1;  /* bit 107 */
  67         u32 scsscf : 1; /* bit 108 */
  68         u32 : 19;
  69 }__attribute__((packed));
  70
  71 extern struct css_chsc_char css_chsc_characteristics;
  72
  73 struct chsc_ssd_info {
  74         u8 path_mask;
  75         u8 fla_valid_mask;
  76         struct chp_id chpid[8];
  77         u16 fla[8];
  78 };
  79
  80 struct chsc_scpd {
  81         struct chsc_header request;
  82         u32:2;
  83         u32 m:1;
  84         u32 c:1;
  85         u32 fmt:4;
  86         u32 cssid:8;
  87         u32:4;
  88         u32 rfmt:4;
  89         u32 first_chpid:8;
  90         u32:24;
  91         u32 last_chpid:8;
  92         u32 zeroes1;
  93         struct chsc_header response;
  94         u8 data[PAGE_SIZE - 20];
  95 } __attribute__ ((packed));
  96
  97
  98 extern int chsc_get_ssd_info(struct subchannel_id schid,
  99                              struct chsc_ssd_info *ssd);
 100 extern int chsc_determine_css_characteristics(void);
 101 extern int chsc_init(void);
 102 extern void chsc_init_cleanup(void);
 103
 104 extern int chsc_enable_facility(int);
 105 struct channel_subsystem;
 106 extern int chsc_secm(struct channel_subsystem *, int);
 107 int __chsc_do_secm(struct channel_subsystem *css, int enable);
 108
 109 int chsc_chp_vary(struct chp_id chpid, int on);
 110 int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
 111                                      int c, int m, void *page);
 112 int chsc_determine_base_channel_path_desc(struct chp_id chpid,
 113                                           struct channel_path_desc *desc);
 114 int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid,
 115                                           struct channel_path_desc_fmt1 *desc);
 116 void chsc_chp_online(struct chp_id chpid);
 117 void chsc_chp_offline(struct chp_id chpid);
 118 int chsc_get_channel_measurement_chars(struct channel_path *chp);
 119
 120 int chsc_error_from_response(int response);
 121
 122 int chsc_siosl(struct subchannel_id schid);
 123
 124 /* Functions and definitions to query storage-class memory. */
 125 struct sale {
 126         u64 sa;
 127         u32 p:4;
 128         u32 op_state:4;
 129         u32 data_state:4;
 130         u32 rank:4;
 131         u32 r:1;
 132         u32:7;
 133         u32 rid:8;
 134         u32:32;
 135 } __packed;
 136
 137 struct chsc_scm_info {
 138         struct chsc_header request;
 139         u32:32;
 140         u64 reqtok;
 141         u32 reserved1[4];
 142         struct chsc_header response;
 143         u64:56;
 144         u8 rq;
 145         u32 mbc;
 146         u64 msa;
 147         u16 is;
 148         u16 mmc;
 149         u32 mci;
 150         u64 nr_scm_ini;
 151         u64 nr_scm_unini;
 152         u32 reserved2[10];
 153         u64 restok;
 154         struct sale scmal[248];
 155 } __packed;
 156
 157 int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token);
 158
 159 #ifdef CONFIG_SCM_BUS
 160 int scm_update_information(void);
 161 int scm_process_availability_information(void);
 162 #else /* CONFIG_SCM_BUS */
 163 static inline int scm_update_information(void) { return 0; }
 164 static inline int scm_process_availability_information(void) { return 0; }
 165 #endif /* CONFIG_SCM_BUS */
 166
 167
 168 #endif