1/* 2 * include/asm-s390/cio.h 3 * include/asm-s390x/cio.h 4 * 5 * Common interface for I/O on S/390 6 */ 7#ifndef _ASM_S390_CIO_H_ 8#define _ASM_S390_CIO_H_ 9 10#include <linux/spinlock.h> 11#include <asm/types.h> 12 13#ifdef __KERNEL__ 14 15#define LPM_ANYPATH 0xff 16#define __MAX_CSSID 0 17 18#include <asm/scsw.h> 19 20/** 21 * struct ccw1 - channel command word 22 * @cmd_code: command code 23 * @flags: flags, like IDA addressing, etc. 24 * @count: byte count 25 * @cda: data address 26 * 27 * The ccw is the basic structure to build channel programs that perform 28 * operations with the device or the control unit. Only Format-1 channel 29 * command words are supported. 30 */ 31struct ccw1 { 32 __u8 cmd_code; 33 __u8 flags; 34 __u16 count; 35 __u32 cda; 36} __attribute__ ((packed,aligned(8))); 37 38#define CCW_FLAG_DC 0x80 39#define CCW_FLAG_CC 0x40 40#define CCW_FLAG_SLI 0x20 41#define CCW_FLAG_SKIP 0x10 42#define CCW_FLAG_PCI 0x08 43#define CCW_FLAG_IDA 0x04 44#define CCW_FLAG_SUSPEND 0x02 45 46#define CCW_CMD_READ_IPL 0x02 47#define CCW_CMD_NOOP 0x03 48#define CCW_CMD_BASIC_SENSE 0x04 49#define CCW_CMD_TIC 0x08 50#define CCW_CMD_STLCK 0x14 51#define CCW_CMD_SENSE_PGID 0x34 52#define CCW_CMD_SUSPEND_RECONN 0x5B 53#define CCW_CMD_RDC 0x64 54#define CCW_CMD_RELEASE 0x94 55#define CCW_CMD_SET_PGID 0xAF 56#define CCW_CMD_SENSE_ID 0xE4 57#define CCW_CMD_DCTL 0xF3 58 59#define SENSE_MAX_COUNT 0x20 60 61/** 62 * struct erw - extended report word 63 * @res0: reserved 64 * @auth: authorization check 65 * @pvrf: path-verification-required flag 66 * @cpt: channel-path timeout 67 * @fsavf: failing storage address validity flag 68 * @cons: concurrent sense 69 * @scavf: secondary ccw address validity flag 70 * @fsaf: failing storage address format 71 * @scnt: sense count, if @cons == %1 72 * @res16: reserved 73 */ 74struct erw { 75 __u32 res0 : 3; 76 __u32 auth : 1; 77 __u32 pvrf : 1; 78 __u32 cpt : 1; 79 __u32 fsavf : 1; 80 __u32 cons : 1; 81 __u32 scavf : 1; 82 __u32 fsaf : 1; 83 __u32 scnt : 6; 84 __u32 res16 : 16; 85} __attribute__ ((packed)); 86 87/** 88 * struct sublog - subchannel logout area 89 * @res0: reserved 90 * @esf: extended status flags 91 * @lpum: last path used mask 92 * @arep: ancillary report 93 * @fvf: field-validity flags 94 * @sacc: storage access code 95 * @termc: termination code 96 * @devsc: device-status check 97 * @serr: secondary error 98 * @ioerr: i/o-error alert 99 * @seqc: sequence code 100 */ 101struct sublog { 102 __u32 res0 : 1; 103 __u32 esf : 7; 104 __u32 lpum : 8; 105 __u32 arep : 1; 106 __u32 fvf : 5; 107 __u32 sacc : 2; 108 __u32 termc : 2; 109 __u32 devsc : 1; 110 __u32 serr : 1; 111 __u32 ioerr : 1; 112 __u32 seqc : 3; 113} __attribute__ ((packed)); 114 115/** 116 * struct esw0 - Format 0 Extended Status Word (ESW) 117 * @sublog: subchannel logout 118 * @erw: extended report word 119 * @faddr: failing storage address 120 * @saddr: secondary ccw address 121 */ 122struct esw0 { 123 struct sublog sublog; 124 struct erw erw; 125 __u32 faddr[2]; 126 __u32 saddr; 127} __attribute__ ((packed)); 128 129/** 130 * struct esw1 - Format 1 Extended Status Word (ESW) 131 * @zero0: reserved zeros 132 * @lpum: last path used mask 133 * @zero16: reserved zeros 134 * @erw: extended report word 135 * @zeros: three fullwords of zeros 136 */ 137struct esw1 { 138 __u8 zero0; 139 __u8 lpum; 140 __u16 zero16; 141 struct erw erw; 142 __u32 zeros[3]; 143} __attribute__ ((packed)); 144 145/** 146 * struct esw2 - Format 2 Extended Status Word (ESW) 147 * @zero0: reserved zeros 148 * @lpum: last path used mask 149 * @dcti: device-connect-time interval 150 * @erw: extended report word 151 * @zeros: three fullwords of zeros 152 */ 153struct esw2 { 154 __u8 zero0; 155 __u8 lpum; 156 __u16 dcti; 157 struct erw erw; 158 __u32 zeros[3]; 159} __attribute__ ((packed)); 160 161/** 162 * struct esw3 - Format 3 Extended Status Word (ESW) 163 * @zero0: reserved zeros 164 * @lpum: last path used mask 165 * @res: reserved 166 * @erw: extended report word 167 * @zeros: three fullwords of zeros 168 */ 169struct esw3 { 170 __u8 zero0; 171 __u8 lpum; 172 __u16 res; 173 struct erw erw; 174 __u32 zeros[3]; 175} __attribute__ ((packed)); 176 177/** 178 * struct irb - interruption response block 179 * @scsw: subchannel status word 180 * @esw: extened status word, 4 formats 181 * @ecw: extended control word 182 * 183 * The irb that is handed to the device driver when an interrupt occurs. For 184 * solicited interrupts, the common I/O layer already performs checks whether 185 * a field is valid; a field not being valid is always passed as %0. 186 * If a unit check occured, @ecw may contain sense data; this is retrieved 187 * by the common I/O layer itself if the device doesn't support concurrent 188 * sense (so that the device driver never needs to perform basic sene itself). 189 * For unsolicited interrupts, the irb is passed as-is (expect for sense data, 190 * if applicable). 191 */ 192struct irb { 193 union scsw scsw; 194 union { 195 struct esw0 esw0; 196 struct esw1 esw1; 197 struct esw2 esw2; 198 struct esw3 esw3; 199 } esw; 200 __u8 ecw[32]; 201} __attribute__ ((packed,aligned(4))); 202 203/** 204 * struct ciw - command information word (CIW) layout 205 * @et: entry type 206 * @reserved: reserved bits 207 * @ct: command type 208 * @cmd: command code 209 * @count: command count 210 */ 211struct ciw { 212 __u32 et : 2; 213 __u32 reserved : 2; 214 __u32 ct : 4; 215 __u32 cmd : 8; 216 __u32 count : 16; 217} __attribute__ ((packed)); 218 219#define CIW_TYPE_RCD 0x0 /* read configuration data */ 220#define CIW_TYPE_SII 0x1 /* set interface identifier */ 221#define CIW_TYPE_RNI 0x2 /* read node identifier */ 222 223/* 224 * Flags used as input parameters for do_IO() 225 */ 226#define DOIO_ALLOW_SUSPEND 0x0001 /* allow for channel prog. suspend */ 227#define DOIO_DENY_PREFETCH 0x0002 /* don't allow for CCW prefetch */ 228#define DOIO_SUPPRESS_INTER 0x0004 /* suppress intermediate inter. */ 229 /* ... for suspended CCWs */ 230/* Device or subchannel gone. */ 231#define CIO_GONE 0x0001 232/* No path to device. */ 233#define CIO_NO_PATH 0x0002 234/* Device has appeared. */ 235#define CIO_OPER 0x0004 236/* Sick revalidation of device. */ 237#define CIO_REVALIDATE 0x0008 238/* Device did not respond in time. */ 239#define CIO_BOXED 0x0010 240 241/** 242 * struct ccw_dev_id - unique identifier for ccw devices 243 * @ssid: subchannel set id 244 * @devno: device number 245 * 246 * This structure is not directly based on any hardware structure. The 247 * hardware identifies a device by its device number and its subchannel, 248 * which is in turn identified by its id. In order to get a unique identifier 249 * for ccw devices across subchannel sets, @struct ccw_dev_id has been 250 * introduced. 251 */ 252struct ccw_dev_id { 253 u8 ssid; 254 u16 devno; 255}; 256 257/** 258 * ccw_device_id_is_equal() - compare two ccw_dev_ids 259 * @dev_id1: a ccw_dev_id 260 * @dev_id2: another ccw_dev_id 261 * Returns: 262 * %1 if the two structures are equal field-by-field, 263 * %0 if not. 264 * Context: 265 * any 266 */ 267static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1, 268 struct ccw_dev_id *dev_id2) 269{ 270 if ((dev_id1->ssid == dev_id2->ssid) && 271 (dev_id1->devno == dev_id2->devno)) 272 return 1; 273 return 0; 274} 275 276extern void wait_cons_dev(void); 277 278extern void css_schedule_reprobe(void); 279 280extern void reipl_ccw_dev(struct ccw_dev_id *id); 281 282struct cio_iplinfo { 283 u16 devno; 284 int is_qdio; 285}; 286 287extern int cio_get_iplinfo(struct cio_iplinfo *iplinfo); 288 289/* Function from drivers/s390/cio/chsc.c */ 290int chsc_sstpc(void *page, unsigned int op, u16 ctrl); 291int chsc_sstpi(void *page, void *result, size_t size); 292 293#endif 294 295#endif 296