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