^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Common interface for I/O on S/390
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #ifndef _ASM_S390_CIO_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #define _ASM_S390_CIO_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/genalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <asm/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define LPM_ANYPATH 0xff
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #define __MAX_CSSID 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #define __MAX_SUBCHANNEL 65535
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #define __MAX_SSID 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/scsw.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * struct ccw1 - channel command word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * @cmd_code: command code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * @flags: flags, like IDA addressing, etc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * @count: byte count
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * @cda: data address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * The ccw is the basic structure to build channel programs that perform
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * operations with the device or the control unit. Only Format-1 channel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * command words are supported.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct ccw1 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) __u8 cmd_code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) __u8 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) __u16 count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) __u32 cda;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) } __attribute__ ((packed,aligned(8)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * struct ccw0 - channel command word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * @cmd_code: command code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * @cda: data address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * @flags: flags, like IDA addressing, etc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * @reserved: will be ignored
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * @count: byte count
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * The format-0 ccw structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) struct ccw0 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) __u8 cmd_code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) __u32 cda : 24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) __u8 flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) __u8 reserved;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) __u16 count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) } __packed __aligned(8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define CCW_FLAG_DC 0x80
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define CCW_FLAG_CC 0x40
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) #define CCW_FLAG_SLI 0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) #define CCW_FLAG_SKIP 0x10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define CCW_FLAG_PCI 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) #define CCW_FLAG_IDA 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) #define CCW_FLAG_SUSPEND 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) #define CCW_CMD_READ_IPL 0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) #define CCW_CMD_NOOP 0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) #define CCW_CMD_BASIC_SENSE 0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define CCW_CMD_TIC 0x08
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define CCW_CMD_STLCK 0x14
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #define CCW_CMD_SENSE_PGID 0x34
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) #define CCW_CMD_SUSPEND_RECONN 0x5B
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #define CCW_CMD_RDC 0x64
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #define CCW_CMD_RELEASE 0x94
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) #define CCW_CMD_SET_PGID 0xAF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) #define CCW_CMD_SENSE_ID 0xE4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) #define CCW_CMD_DCTL 0xF3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) #define SENSE_MAX_COUNT 0x20
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * struct erw - extended report word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) * @res0: reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) * @auth: authorization check
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * @pvrf: path-verification-required flag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * @cpt: channel-path timeout
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * @fsavf: failing storage address validity flag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * @cons: concurrent sense
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) * @scavf: secondary ccw address validity flag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * @fsaf: failing storage address format
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) * @scnt: sense count, if @cons == %1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) * @res16: reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct erw {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) __u32 res0 : 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) __u32 auth : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) __u32 pvrf : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) __u32 cpt : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) __u32 fsavf : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) __u32 cons : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) __u32 scavf : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) __u32 fsaf : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) __u32 scnt : 6;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) __u32 res16 : 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) } __attribute__ ((packed));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) * struct erw_eadm - EADM Subchannel extended report word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) * @b: aob error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) * @r: arsb error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) struct erw_eadm {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) __u32 : 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) __u32 b : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) __u32 r : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) __u32 : 14;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * struct sublog - subchannel logout area
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * @res0: reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) * @esf: extended status flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) * @lpum: last path used mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) * @arep: ancillary report
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) * @fvf: field-validity flags
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) * @sacc: storage access code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) * @termc: termination code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) * @devsc: device-status check
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * @serr: secondary error
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * @ioerr: i/o-error alert
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * @seqc: sequence code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct sublog {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) __u32 res0 : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) __u32 esf : 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) __u32 lpum : 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) __u32 arep : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) __u32 fvf : 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) __u32 sacc : 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) __u32 termc : 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) __u32 devsc : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) __u32 serr : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) __u32 ioerr : 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) __u32 seqc : 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) } __attribute__ ((packed));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * struct esw0 - Format 0 Extended Status Word (ESW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * @sublog: subchannel logout
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * @erw: extended report word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * @faddr: failing storage address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * @saddr: secondary ccw address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct esw0 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) struct sublog sublog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) struct erw erw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) __u32 faddr[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) __u32 saddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) } __attribute__ ((packed));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * struct esw1 - Format 1 Extended Status Word (ESW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) * @zero0: reserved zeros
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) * @lpum: last path used mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) * @zero16: reserved zeros
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) * @erw: extended report word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) * @zeros: three fullwords of zeros
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct esw1 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) __u8 zero0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) __u8 lpum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) __u16 zero16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) struct erw erw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) __u32 zeros[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) } __attribute__ ((packed));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) * struct esw2 - Format 2 Extended Status Word (ESW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) * @zero0: reserved zeros
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) * @lpum: last path used mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) * @dcti: device-connect-time interval
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) * @erw: extended report word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) * @zeros: three fullwords of zeros
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) struct esw2 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) __u8 zero0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) __u8 lpum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) __u16 dcti;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) struct erw erw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) __u32 zeros[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) } __attribute__ ((packed));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) * struct esw3 - Format 3 Extended Status Word (ESW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) * @zero0: reserved zeros
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) * @lpum: last path used mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * @res: reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * @erw: extended report word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * @zeros: three fullwords of zeros
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) struct esw3 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) __u8 zero0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) __u8 lpum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) __u16 res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) struct erw erw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) __u32 zeros[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) } __attribute__ ((packed));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * struct esw_eadm - EADM Subchannel Extended Status Word (ESW)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * @sublog: subchannel logout
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) * @erw: extended report word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) struct esw_eadm {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) __u32 sublog;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) struct erw_eadm erw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) __u32 : 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) __u32 : 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) __u32 : 32;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) * struct irb - interruption response block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) * @scsw: subchannel status word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * @esw: extended status word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) * @ecw: extended control word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) * The irb that is handed to the device driver when an interrupt occurs. For
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) * solicited interrupts, the common I/O layer already performs checks whether
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * a field is valid; a field not being valid is always passed as %0.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * If a unit check occurred, @ecw may contain sense data; this is retrieved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * by the common I/O layer itself if the device doesn't support concurrent
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * sense (so that the device driver never needs to perform basic sense itself).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * For unsolicited interrupts, the irb is passed as-is (expect for sense data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * if applicable).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) struct irb {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) union scsw scsw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) struct esw0 esw0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) struct esw1 esw1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) struct esw2 esw2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) struct esw3 esw3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) struct esw_eadm eadm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) } esw;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) __u8 ecw[32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) } __attribute__ ((packed,aligned(4)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) * struct ciw - command information word (CIW) layout
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) * @et: entry type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) * @reserved: reserved bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) * @ct: command type
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) * @cmd: command code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) * @count: command count
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) struct ciw {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) __u32 et : 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) __u32 reserved : 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) __u32 ct : 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) __u32 cmd : 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) __u32 count : 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) } __attribute__ ((packed));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) #define CIW_TYPE_RCD 0x0 /* read configuration data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) #define CIW_TYPE_SII 0x1 /* set interface identifier */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) #define CIW_TYPE_RNI 0x2 /* read node identifier */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) * Node Descriptor as defined in SA22-7204, "Common I/O-Device Commands"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) #define ND_VALIDITY_VALID 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) #define ND_VALIDITY_OUTDATED 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) #define ND_VALIDITY_INVALID 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) struct node_descriptor {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) /* Flags. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) u32 validity:3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) u32 reserved:5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) u8 byte0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) /* Node parameters. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) u32 params:24;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) /* Node ID. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) char type[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) char model[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) char manufacturer[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) char plant[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) char seq[12];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) u16 tag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) } __packed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) * Flags used as input parameters for do_IO()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) #define DOIO_ALLOW_SUSPEND 0x0001 /* allow for channel prog. suspend */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) #define DOIO_DENY_PREFETCH 0x0002 /* don't allow for CCW prefetch */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) #define DOIO_SUPPRESS_INTER 0x0004 /* suppress intermediate inter. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) /* ... for suspended CCWs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) /* Device or subchannel gone. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) #define CIO_GONE 0x0001
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) /* No path to device. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) #define CIO_NO_PATH 0x0002
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) /* Device has appeared. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) #define CIO_OPER 0x0004
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) /* Sick revalidation of device. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) #define CIO_REVALIDATE 0x0008
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) /* Device did not respond in time. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) #define CIO_BOXED 0x0010
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) * struct ccw_dev_id - unique identifier for ccw devices
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) * @ssid: subchannel set id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) * @devno: device number
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) * This structure is not directly based on any hardware structure. The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) * hardware identifies a device by its device number and its subchannel,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) * which is in turn identified by its id. In order to get a unique identifier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) * for ccw devices across subchannel sets, @struct ccw_dev_id has been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) * introduced.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) struct ccw_dev_id {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) u8 ssid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) u16 devno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) * ccw_device_id_is_equal() - compare two ccw_dev_ids
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) * @dev_id1: a ccw_dev_id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) * @dev_id2: another ccw_dev_id
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) * Returns:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) * %1 if the two structures are equal field-by-field,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) * %0 if not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) * Context:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) * any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) struct ccw_dev_id *dev_id2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) if ((dev_id1->ssid == dev_id2->ssid) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) (dev_id1->devno == dev_id2->devno))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) * pathmask_to_pos() - find the position of the left-most bit in a pathmask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) * @mask: pathmask with at least one bit set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) static inline u8 pathmask_to_pos(u8 mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) return 8 - ffs(mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) extern void css_schedule_reprobe(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) extern void *cio_dma_zalloc(size_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) extern void cio_dma_free(void *cpu_addr, size_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) extern struct device *cio_get_dma_css_dev(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) void *cio_gp_dma_zalloc(struct gen_pool *gp_dma, struct device *dma_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) size_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) void cio_gp_dma_free(struct gen_pool *gp_dma, void *cpu_addr, size_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) void cio_gp_dma_destroy(struct gen_pool *gp_dma, struct device *dma_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) struct gen_pool *cio_gp_dma_create(struct device *dma_dev, int nr_pages);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) /* Function from drivers/s390/cio/chsc.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) int chsc_sstpc(void *page, unsigned int op, u16 ctrl, u64 *clock_delta);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) int chsc_sstpi(void *page, void *result, size_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) int chsc_stzi(void *page, void *result, size_t size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) int chsc_sgib(u32 origin);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) #endif
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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