arch/s390/include/asm/fcx.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  *  Functions for assembling fcx enabled I/O control blocks.
   4  *
   5  *    Copyright IBM Corp. 2008
   6  *    Author(s): Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
   7  */
   8
   9 #ifndef _ASM_S390_FCX_H
  10 #define _ASM_S390_FCX_H
  11
  12 #include <linux/types.h>
  13
  14 #define TCW_FORMAT_DEFAULT              0
  15 #define TCW_TIDAW_FORMAT_DEFAULT        0
  16 #define TCW_FLAGS_INPUT_TIDA            (1 << (23 - 5))
  17 #define TCW_FLAGS_TCCB_TIDA             (1 << (23 - 6))
  18 #define TCW_FLAGS_OUTPUT_TIDA           (1 << (23 - 7))
  19 #define TCW_FLAGS_TIDAW_FORMAT(x)       ((x) & 3) << (23 - 9)
  20 #define TCW_FLAGS_GET_TIDAW_FORMAT(x)   (((x) >> (23 - 9)) & 3)
  21
  22 /**
  23  * struct tcw - Transport Control Word (TCW)
  24  * @format: TCW format
  25  * @flags: TCW flags
  26  * @tccbl: Transport-Command-Control-Block Length
  27  * @r: Read Operations
  28  * @w: Write Operations
  29  * @output: Output-Data Address
  30  * @input: Input-Data Address
  31  * @tsb: Transport-Status-Block Address
  32  * @tccb: Transport-Command-Control-Block Address
  33  * @output_count: Output Count
  34  * @input_count: Input Count
  35  * @intrg: Interrogate TCW Address
  36  */
  37 struct tcw {
  38         u32 format:2;
  39         u32 :6;
  40         u32 flags:24;
  41         u32 :8;
  42         u32 tccbl:6;
  43         u32 r:1;
  44         u32 w:1;
  45         u32 :16;
  46         u64 output;
  47         u64 input;
  48         u64 tsb;
  49         u64 tccb;
  50         u32 output_count;
  51         u32 input_count;
  52         u32 :32;
  53         u32 :32;
  54         u32 :32;
  55         u32 intrg;
  56 } __attribute__ ((packed, aligned(64)));
  57
  58 #define TIDAW_FLAGS_LAST                (1 << (7 - 0))
  59 #define TIDAW_FLAGS_SKIP                (1 << (7 - 1))
  60 #define TIDAW_FLAGS_DATA_INT            (1 << (7 - 2))
  61 #define TIDAW_FLAGS_TTIC                (1 << (7 - 3))
  62 #define TIDAW_FLAGS_INSERT_CBC          (1 << (7 - 4))
  63
  64 /**
  65  * struct tidaw - Transport-Indirect-Addressing Word (TIDAW)
  66  * @flags: TIDAW flags. Can be an arithmetic OR of the following constants:
  67  * %TIDAW_FLAGS_LAST, %TIDAW_FLAGS_SKIP, %TIDAW_FLAGS_DATA_INT,
  68  * %TIDAW_FLAGS_TTIC, %TIDAW_FLAGS_INSERT_CBC
  69  * @count: Count
  70  * @addr: Address
  71  */
  72 struct tidaw {
  73         u32 flags:8;
  74         u32 :24;
  75         u32 count;
  76         u64 addr;
  77 } __attribute__ ((packed, aligned(16)));
  78
  79 /**
  80  * struct tsa_iostat - I/O-Status Transport-Status Area (IO-Stat TSA)
  81  * @dev_time: Device Time
  82  * @def_time: Defer Time
  83  * @queue_time: Queue Time
  84  * @dev_busy_time: Device-Busy Time
  85  * @dev_act_time: Device-Active-Only Time
  86  * @sense: Sense Data (if present)
  87  */
  88 struct tsa_iostat {
  89         u32 dev_time;
  90         u32 def_time;
  91         u32 queue_time;
  92         u32 dev_busy_time;
  93         u32 dev_act_time;
  94         u8 sense[32];
  95 } __attribute__ ((packed));
  96
  97 /**
  98  * struct tsa_ddpcs - Device-Detected-Program-Check Transport-Status Area (DDPC TSA)
  99  * @rc: Reason Code
 100  * @rcq: Reason Code Qualifier
 101  * @sense: Sense Data (if present)
 102  */
 103 struct tsa_ddpc {
 104         u32 :24;
 105         u32 rc:8;
 106         u8 rcq[16];
 107         u8 sense[32];
 108 } __attribute__ ((packed));
 109
 110 #define TSA_INTRG_FLAGS_CU_STATE_VALID          (1 << (7 - 0))
 111 #define TSA_INTRG_FLAGS_DEV_STATE_VALID         (1 << (7 - 1))
 112 #define TSA_INTRG_FLAGS_OP_STATE_VALID          (1 << (7 - 2))
 113
 114 /**
 115  * struct tsa_intrg - Interrogate Transport-Status Area (Intrg. TSA)
 116  * @format: Format
 117  * @flags: Flags. Can be an arithmetic OR of the following constants:
 118  * %TSA_INTRG_FLAGS_CU_STATE_VALID, %TSA_INTRG_FLAGS_DEV_STATE_VALID,
 119  * %TSA_INTRG_FLAGS_OP_STATE_VALID
 120  * @cu_state: Controle-Unit State
 121  * @dev_state: Device State
 122  * @op_state: Operation State
 123  * @sd_info: State-Dependent Information
 124  * @dl_id: Device-Level Identifier
 125  * @dd_data: Device-Dependent Data
 126  */
 127 struct tsa_intrg {
 128         u32 format:8;
 129         u32 flags:8;
 130         u32 cu_state:8;
 131         u32 dev_state:8;
 132         u32 op_state:8;
 133         u32 :24;
 134         u8 sd_info[12];
 135         u32 dl_id;
 136         u8 dd_data[28];
 137 } __attribute__ ((packed));
 138
 139 #define TSB_FORMAT_NONE         0
 140 #define TSB_FORMAT_IOSTAT       1
 141 #define TSB_FORMAT_DDPC         2
 142 #define TSB_FORMAT_INTRG        3
 143
 144 #define TSB_FLAGS_DCW_OFFSET_VALID      (1 << (7 - 0))
 145 #define TSB_FLAGS_COUNT_VALID           (1 << (7 - 1))
 146 #define TSB_FLAGS_CACHE_MISS            (1 << (7 - 2))
 147 #define TSB_FLAGS_TIME_VALID            (1 << (7 - 3))
 148 #define TSB_FLAGS_FORMAT(x)             ((x) & 7)
 149 #define TSB_FORMAT(t)                   ((t)->flags & 7)
 150
 151 /**
 152  * struct tsb - Transport-Status Block (TSB)
 153  * @length: Length
 154  * @flags: Flags. Can be an arithmetic OR of the following constants:
 155  * %TSB_FLAGS_DCW_OFFSET_VALID, %TSB_FLAGS_COUNT_VALID, %TSB_FLAGS_CACHE_MISS,
 156  * %TSB_FLAGS_TIME_VALID
 157  * @dcw_offset: DCW Offset
 158  * @count: Count
 159  * @tsa: Transport-Status-Area
 160  */
 161 struct tsb {
 162         u32 length:8;
 163         u32 flags:8;
 164         u32 dcw_offset:16;
 165         u32 count;
 166         u32 :32;
 167         union {
 168                 struct tsa_iostat iostat;
 169                 struct tsa_ddpc ddpc;
 170                 struct tsa_intrg intrg;
 171         } __attribute__ ((packed)) tsa;
 172 } __attribute__ ((packed, aligned(8)));
 173
 174 #define DCW_INTRG_FORMAT_DEFAULT        0
 175
 176 #define DCW_INTRG_RC_UNSPECIFIED        0
 177 #define DCW_INTRG_RC_TIMEOUT            1
 178
 179 #define DCW_INTRG_RCQ_UNSPECIFIED       0
 180 #define DCW_INTRG_RCQ_PRIMARY           1
 181 #define DCW_INTRG_RCQ_SECONDARY         2
 182
 183 #define DCW_INTRG_FLAGS_MPM             (1 << (7 - 0))
 184 #define DCW_INTRG_FLAGS_PPR             (1 << (7 - 1))
 185 #define DCW_INTRG_FLAGS_CRIT            (1 << (7 - 2))
 186
 187 /**
 188  * struct dcw_intrg_data - Interrogate DCW data
 189  * @format: Format. Should be %DCW_INTRG_FORMAT_DEFAULT
 190  * @rc: Reason Code. Can be one of %DCW_INTRG_RC_UNSPECIFIED,
 191  * %DCW_INTRG_RC_TIMEOUT
 192  * @rcq: Reason Code Qualifier: Can be one of %DCW_INTRG_RCQ_UNSPECIFIED,
 193  * %DCW_INTRG_RCQ_PRIMARY, %DCW_INTRG_RCQ_SECONDARY
 194  * @lpm: Logical-Path Mask
 195  * @pam: Path-Available Mask
 196  * @pim: Path-Installed Mask
 197  * @timeout: Timeout
 198  * @flags: Flags. Can be an arithmetic OR of %DCW_INTRG_FLAGS_MPM,
 199  * %DCW_INTRG_FLAGS_PPR, %DCW_INTRG_FLAGS_CRIT
 200  * @time: Time
 201  * @prog_id: Program Identifier
 202  * @prog_data: Program-Dependent Data
 203  */
 204 struct dcw_intrg_data {
 205         u32 format:8;
 206         u32 rc:8;
 207         u32 rcq:8;
 208         u32 lpm:8;
 209         u32 pam:8;
 210         u32 pim:8;
 211         u32 timeout:16;
 212         u32 flags:8;
 213         u32 :24;
 214         u32 :32;
 215         u64 time;
 216         u64 prog_id;
 217         u8  prog_data[0];
 218 } __attribute__ ((packed));
 219
 220 #define DCW_FLAGS_CC            (1 << (7 - 1))
 221
 222 #define DCW_CMD_WRITE           0x01
 223 #define DCW_CMD_READ            0x02
 224 #define DCW_CMD_CONTROL         0x03
 225 #define DCW_CMD_SENSE           0x04
 226 #define DCW_CMD_SENSE_ID        0xe4
 227 #define DCW_CMD_INTRG           0x40
 228
 229 /**
 230  * struct dcw - Device-Command Word (DCW)
 231  * @cmd: Command Code. Can be one of %DCW_CMD_WRITE, %DCW_CMD_READ,
 232  * %DCW_CMD_CONTROL, %DCW_CMD_SENSE, %DCW_CMD_SENSE_ID, %DCW_CMD_INTRG
 233  * @flags: Flags. Can be an arithmetic OR of %DCW_FLAGS_CC
 234  * @cd_count: Control-Data Count
 235  * @count: Count
 236  * @cd: Control Data
 237  */
 238 struct dcw {
 239         u32 cmd:8;
 240         u32 flags:8;
 241         u32 :8;
 242         u32 cd_count:8;
 243         u32 count;
 244         u8 cd[0];
 245 } __attribute__ ((packed));
 246
 247 #define TCCB_FORMAT_DEFAULT     0x7f
 248 #define TCCB_MAX_DCW            30
 249 #define TCCB_MAX_SIZE           (sizeof(struct tccb_tcah) + \
 250                                  TCCB_MAX_DCW * sizeof(struct dcw) + \
 251                                  sizeof(struct tccb_tcat))
 252 #define TCCB_SAC_DEFAULT        0x1ffe
 253 #define TCCB_SAC_INTRG          0x1fff
 254
 255 /**
 256  * struct tccb_tcah - Transport-Command-Area Header (TCAH)
 257  * @format: Format. Should be %TCCB_FORMAT_DEFAULT
 258  * @tcal: Transport-Command-Area Length
 259  * @sac: Service-Action Code. Can be one of %TCCB_SAC_DEFAULT, %TCCB_SAC_INTRG
 260  * @prio: Priority
 261  */
 262 struct tccb_tcah {
 263         u32 format:8;
 264         u32 :24;
 265         u32 :24;
 266         u32 tcal:8;
 267         u32 sac:16;
 268         u32 :8;
 269         u32 prio:8;
 270         u32 :32;
 271 } __attribute__ ((packed));
 272
 273 /**
 274  * struct tccb_tcat - Transport-Command-Area Trailer (TCAT)
 275  * @count: Transport Count
 276  */
 277 struct tccb_tcat {
 278         u32 :32;
 279         u32 count;
 280 } __attribute__ ((packed));
 281
 282 /**
 283  * struct tccb - (partial) Transport-Command-Control Block (TCCB)
 284  * @tcah: TCAH
 285  * @tca: Transport-Command Area
 286  */
 287 struct tccb {
 288         struct tccb_tcah tcah;
 289         u8 tca[0];
 290 } __attribute__ ((packed, aligned(8)));
 291
 292 struct tcw *tcw_get_intrg(struct tcw *tcw);
 293 void *tcw_get_data(struct tcw *tcw);
 294 struct tccb *tcw_get_tccb(struct tcw *tcw);
 295 struct tsb *tcw_get_tsb(struct tcw *tcw);
 296
 297 void tcw_init(struct tcw *tcw, int r, int w);
 298 void tcw_finalize(struct tcw *tcw, int num_tidaws);
 299
 300 void tcw_set_intrg(struct tcw *tcw, struct tcw *intrg_tcw);
 301 void tcw_set_data(struct tcw *tcw, void *data, int use_tidal);
 302 void tcw_set_tccb(struct tcw *tcw, struct tccb *tccb);
 303 void tcw_set_tsb(struct tcw *tcw, struct tsb *tsb);
 304
 305 void tccb_init(struct tccb *tccb, size_t tccb_size, u32 sac);
 306 void tsb_init(struct tsb *tsb);
 307 struct dcw *tccb_add_dcw(struct tccb *tccb, size_t tccb_size, u8 cmd, u8 flags,
 308                          void *cd, u8 cd_count, u32 count);
 309 struct tidaw *tcw_add_tidaw(struct tcw *tcw, int num_tidaws, u8 flags,
 310                             void *addr, u32 count);
 311
 312 #endif /* _ASM_S390_FCX_H */