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[3]; 47 u16 mdc; 48 u16:13; 49 u8 r:1; 50 u8 s:1; 51 u8 f:1; 52 u32 zeros[2]; 53 } __attribute__ ((packed)); 54 55 struct channel_path; 56 57 struct css_chsc_char { 58 u64 res; 59 u64 : 20; 60 u32 secm : 1; /* bit 84 */ 61 u32 : 1; 62 u32 scmc : 1; /* bit 86 */ 63 u32 : 20; 64 u32 scssc : 1; /* bit 107 */ 65 u32 scsscf : 1; /* bit 108 */ 66 u32 : 19; 67 }__attribute__((packed)); 68 69 extern struct css_chsc_char css_chsc_characteristics; 70 71 struct chsc_ssd_info { 72 u8 path_mask; 73 u8 fla_valid_mask; 74 struct chp_id chpid[8]; 75 u16 fla[8]; 76 }; 77 78 struct chsc_scpd { 79 struct chsc_header request; 80 u32:2; 81 u32 m:1; 82 u32 c:1; 83 u32 fmt:4; 84 u32 cssid:8; 85 u32:4; 86 u32 rfmt:4; 87 u32 first_chpid:8; 88 u32:24; 89 u32 last_chpid:8; 90 u32 zeroes1; 91 struct chsc_header response; 92 u8 data[PAGE_SIZE - 20]; 93 } __attribute__ ((packed)); 94 95 96 extern int chsc_get_ssd_info(struct subchannel_id schid, 97 struct chsc_ssd_info *ssd); 98 extern int chsc_determine_css_characteristics(void); 99 extern int chsc_init(void); 100 extern void chsc_init_cleanup(void); 101 102 extern int chsc_enable_facility(int); 103 struct channel_subsystem; 104 extern int chsc_secm(struct channel_subsystem *, int); 105 int __chsc_do_secm(struct channel_subsystem *css, int enable); 106 107 int chsc_chp_vary(struct chp_id chpid, int on); 108 int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt, 109 int c, int m, void *page); 110 int chsc_determine_base_channel_path_desc(struct chp_id chpid, 111 struct channel_path_desc *desc); 112 int chsc_determine_fmt1_channel_path_desc(struct chp_id chpid, 113 struct channel_path_desc_fmt1 *desc); 114 void chsc_chp_online(struct chp_id chpid); 115 void chsc_chp_offline(struct chp_id chpid); 116 int chsc_get_channel_measurement_chars(struct channel_path *chp); 117 118 int chsc_error_from_response(int response); 119 120 int chsc_siosl(struct subchannel_id schid); 121 122 /* Functions and definitions to query storage-class memory. */ 123 struct sale { 124 u64 sa; 125 u32 p:4; 126 u32 op_state:4; 127 u32 data_state:4; 128 u32 rank:4; 129 u32 r:1; 130 u32:7; 131 u32 rid:8; 132 u32:32; 133 } __packed; 134 135 struct chsc_scm_info { 136 struct chsc_header request; 137 u32:32; 138 u64 reqtok; 139 u32 reserved1[4]; 140 struct chsc_header response; 141 u64:56; 142 u8 rq; 143 u32 mbc; 144 u64 msa; 145 u16 is; 146 u16 mmc; 147 u32 mci; 148 u64 nr_scm_ini; 149 u64 nr_scm_unini; 150 u32 reserved2[10]; 151 u64 restok; 152 struct sale scmal[248]; 153 } __packed; 154 155 int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token); 156 157 #ifdef CONFIG_SCM_BUS 158 int scm_update_information(void); 159 #else /* CONFIG_SCM_BUS */ 160 #define scm_update_information() 0 161 #endif /* CONFIG_SCM_BUS */ 162 163 164 #endif 165