1 /* 2 * Common interface for I/O on S/390 3 */ 4 #ifndef _ASM_S390_CIO_H_ 5 #define _ASM_S390_CIO_H_ 6 7 #include <linux/spinlock.h> 8 #include <asm/types.h> 9 10 #define LPM_ANYPATH 0xff 11 #define __MAX_CSSID 0 12 #define __MAX_SUBCHANNEL 65535 13 #define __MAX_SSID 3 14 15 #include <asm/scsw.h> 16 17 /** 18 * struct ccw1 - channel command word 19 * @cmd_code: command code 20 * @flags: flags, like IDA addressing, etc. 21 * @count: byte count 22 * @cda: data address 23 * 24 * The ccw is the basic structure to build channel programs that perform 25 * operations with the device or the control unit. Only Format-1 channel 26 * command words are supported. 27 */ 28 struct ccw1 { 29 __u8 cmd_code; 30 __u8 flags; 31 __u16 count; 32 __u32 cda; 33 } __attribute__ ((packed,aligned(8))); 34 35 #define CCW_FLAG_DC 0x80 36 #define CCW_FLAG_CC 0x40 37 #define CCW_FLAG_SLI 0x20 38 #define CCW_FLAG_SKIP 0x10 39 #define CCW_FLAG_PCI 0x08 40 #define CCW_FLAG_IDA 0x04 41 #define CCW_FLAG_SUSPEND 0x02 42 43 #define CCW_CMD_READ_IPL 0x02 44 #define CCW_CMD_NOOP 0x03 45 #define CCW_CMD_BASIC_SENSE 0x04 46 #define CCW_CMD_TIC 0x08 47 #define CCW_CMD_STLCK 0x14 48 #define CCW_CMD_SENSE_PGID 0x34 49 #define CCW_CMD_SUSPEND_RECONN 0x5B 50 #define CCW_CMD_RDC 0x64 51 #define CCW_CMD_RELEASE 0x94 52 #define CCW_CMD_SET_PGID 0xAF 53 #define CCW_CMD_SENSE_ID 0xE4 54 #define CCW_CMD_DCTL 0xF3 55 56 #define SENSE_MAX_COUNT 0x20 57 58 /** 59 * struct erw - extended report word 60 * @res0: reserved 61 * @auth: authorization check 62 * @pvrf: path-verification-required flag 63 * @cpt: channel-path timeout 64 * @fsavf: failing storage address validity flag 65 * @cons: concurrent sense 66 * @scavf: secondary ccw address validity flag 67 * @fsaf: failing storage address format 68 * @scnt: sense count, if @cons == %1 69 * @res16: reserved 70 */ 71 struct erw { 72 __u32 res0 : 3; 73 __u32 auth : 1; 74 __u32 pvrf : 1; 75 __u32 cpt : 1; 76 __u32 fsavf : 1; 77 __u32 cons : 1; 78 __u32 scavf : 1; 79 __u32 fsaf : 1; 80 __u32 scnt : 6; 81 __u32 res16 : 16; 82 } __attribute__ ((packed)); 83 84 /** 85 * struct erw_eadm - EADM Subchannel extended report word 86 * @b: aob error 87 * @r: arsb error 88 */ 89 struct erw_eadm { 90 __u32 : 16; 91 __u32 b : 1; 92 __u32 r : 1; 93 __u32 : 14; 94 } __packed; 95 96 /** 97 * struct sublog - subchannel logout area 98 * @res0: reserved 99 * @esf: extended status flags 100 * @lpum: last path used mask 101 * @arep: ancillary report 102 * @fvf: field-validity flags 103 * @sacc: storage access code 104 * @termc: termination code 105 * @devsc: device-status check 106 * @serr: secondary error 107 * @ioerr: i/o-error alert 108 * @seqc: sequence code 109 */ 110 struct sublog { 111 __u32 res0 : 1; 112 __u32 esf : 7; 113 __u32 lpum : 8; 114 __u32 arep : 1; 115 __u32 fvf : 5; 116 __u32 sacc : 2; 117 __u32 termc : 2; 118 __u32 devsc : 1; 119 __u32 serr : 1; 120 __u32 ioerr : 1; 121 __u32 seqc : 3; 122 } __attribute__ ((packed)); 123 124 /** 125 * struct esw0 - Format 0 Extended Status Word (ESW) 126 * @sublog: subchannel logout 127 * @erw: extended report word 128 * @faddr: failing storage address 129 * @saddr: secondary ccw address 130 */ 131 struct esw0 { 132 struct sublog sublog; 133 struct erw erw; 134 __u32 faddr[2]; 135 __u32 saddr; 136 } __attribute__ ((packed)); 137 138 /** 139 * struct esw1 - Format 1 Extended Status Word (ESW) 140 * @zero0: reserved zeros 141 * @lpum: last path used mask 142 * @zero16: reserved zeros 143 * @erw: extended report word 144 * @zeros: three fullwords of zeros 145 */ 146 struct esw1 { 147 __u8 zero0; 148 __u8 lpum; 149 __u16 zero16; 150 struct erw erw; 151 __u32 zeros[3]; 152 } __attribute__ ((packed)); 153 154 /** 155 * struct esw2 - Format 2 Extended Status Word (ESW) 156 * @zero0: reserved zeros 157 * @lpum: last path used mask 158 * @dcti: device-connect-time interval 159 * @erw: extended report word 160 * @zeros: three fullwords of zeros 161 */ 162 struct esw2 { 163 __u8 zero0; 164 __u8 lpum; 165 __u16 dcti; 166 struct erw erw; 167 __u32 zeros[3]; 168 } __attribute__ ((packed)); 169 170 /** 171 * struct esw3 - Format 3 Extended Status Word (ESW) 172 * @zero0: reserved zeros 173 * @lpum: last path used mask 174 * @res: reserved 175 * @erw: extended report word 176 * @zeros: three fullwords of zeros 177 */ 178 struct esw3 { 179 __u8 zero0; 180 __u8 lpum; 181 __u16 res; 182 struct erw erw; 183 __u32 zeros[3]; 184 } __attribute__ ((packed)); 185 186 /** 187 * struct esw_eadm - EADM Subchannel Extended Status Word (ESW) 188 * @sublog: subchannel logout 189 * @erw: extended report word 190 */ 191 struct esw_eadm { 192 __u32 sublog; 193 struct erw_eadm erw; 194 __u32 : 32; 195 __u32 : 32; 196 __u32 : 32; 197 } __packed; 198 199 /** 200 * struct irb - interruption response block 201 * @scsw: subchannel status word 202 * @esw: extended status word 203 * @ecw: extended control word 204 * 205 * The irb that is handed to the device driver when an interrupt occurs. For 206 * solicited interrupts, the common I/O layer already performs checks whether 207 * a field is valid; a field not being valid is always passed as %0. 208 * If a unit check occurred, @ecw may contain sense data; this is retrieved 209 * by the common I/O layer itself if the device doesn't support concurrent 210 * sense (so that the device driver never needs to perform basic sene itself). 211 * For unsolicited interrupts, the irb is passed as-is (expect for sense data, 212 * if applicable). 213 */ 214 struct irb { 215 union scsw scsw; 216 union { 217 struct esw0 esw0; 218 struct esw1 esw1; 219 struct esw2 esw2; 220 struct esw3 esw3; 221 struct esw_eadm eadm; 222 } esw; 223 __u8 ecw[32]; 224 } __attribute__ ((packed,aligned(4))); 225 226 /** 227 * struct ciw - command information word (CIW) layout 228 * @et: entry type 229 * @reserved: reserved bits 230 * @ct: command type 231 * @cmd: command code 232 * @count: command count 233 */ 234 struct ciw { 235 __u32 et : 2; 236 __u32 reserved : 2; 237 __u32 ct : 4; 238 __u32 cmd : 8; 239 __u32 count : 16; 240 } __attribute__ ((packed)); 241 242 #define CIW_TYPE_RCD 0x0 /* read configuration data */ 243 #define CIW_TYPE_SII 0x1 /* set interface identifier */ 244 #define CIW_TYPE_RNI 0x2 /* read node identifier */ 245 246 /* 247 * Flags used as input parameters for do_IO() 248 */ 249 #define DOIO_ALLOW_SUSPEND 0x0001 /* allow for channel prog. suspend */ 250 #define DOIO_DENY_PREFETCH 0x0002 /* don't allow for CCW prefetch */ 251 #define DOIO_SUPPRESS_INTER 0x0004 /* suppress intermediate inter. */ 252 /* ... for suspended CCWs */ 253 /* Device or subchannel gone. */ 254 #define CIO_GONE 0x0001 255 /* No path to device. */ 256 #define CIO_NO_PATH 0x0002 257 /* Device has appeared. */ 258 #define CIO_OPER 0x0004 259 /* Sick revalidation of device. */ 260 #define CIO_REVALIDATE 0x0008 261 /* Device did not respond in time. */ 262 #define CIO_BOXED 0x0010 263 264 /** 265 * struct ccw_dev_id - unique identifier for ccw devices 266 * @ssid: subchannel set id 267 * @devno: device number 268 * 269 * This structure is not directly based on any hardware structure. The 270 * hardware identifies a device by its device number and its subchannel, 271 * which is in turn identified by its id. In order to get a unique identifier 272 * for ccw devices across subchannel sets, @struct ccw_dev_id has been 273 * introduced. 274 */ 275 struct ccw_dev_id { 276 u8 ssid; 277 u16 devno; 278 }; 279 280 /** 281 * ccw_device_id_is_equal() - compare two ccw_dev_ids 282 * @dev_id1: a ccw_dev_id 283 * @dev_id2: another ccw_dev_id 284 * Returns: 285 * %1 if the two structures are equal field-by-field, 286 * %0 if not. 287 * Context: 288 * any 289 */ 290 static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1, 291 struct ccw_dev_id *dev_id2) 292 { 293 if ((dev_id1->ssid == dev_id2->ssid) && 294 (dev_id1->devno == dev_id2->devno)) 295 return 1; 296 return 0; 297 } 298 299 void channel_subsystem_reinit(void); 300 extern void css_schedule_reprobe(void); 301 302 extern void reipl_ccw_dev(struct ccw_dev_id *id); 303 304 struct cio_iplinfo { 305 u16 devno; 306 int is_qdio; 307 }; 308 309 extern int cio_get_iplinfo(struct cio_iplinfo *iplinfo); 310 311 /* Function from drivers/s390/cio/chsc.c */ 312 int chsc_sstpc(void *page, unsigned int op, u16 ctrl); 313 int chsc_sstpi(void *page, void *result, size_t size); 314 315 #endif 316