| /* |
| * include/asm-s390/cio.h |
| * include/asm-s390x/cio.h |
| * |
| * Common interface for I/O on S/390 |
| */ |
| #ifndef _ASM_S390_CIO_H_ |
| #define _ASM_S390_CIO_H_ |
| |
| #include <linux/spinlock.h> |
| #include <asm/types.h> |
| |
| #ifdef __KERNEL__ |
| |
| #define LPM_ANYPATH 0xff |
| #define __MAX_CSSID 0 |
| |
| /** |
| * struct cmd_scsw - command-mode subchannel status word |
| * @key: subchannel key |
| * @sctl: suspend control |
| * @eswf: esw format |
| * @cc: deferred condition code |
| * @fmt: format |
| * @pfch: prefetch |
| * @isic: initial-status interruption control |
| * @alcc: address-limit checking control |
| * @ssi: suppress-suspended interruption |
| * @zcc: zero condition code |
| * @ectl: extended control |
| * @pno: path not operational |
| * @res: reserved |
| * @fctl: function control |
| * @actl: activity control |
| * @stctl: status control |
| * @cpa: channel program address |
| * @dstat: device status |
| * @cstat: subchannel status |
| * @count: residual count |
| */ |
| struct cmd_scsw { |
| __u32 key : 4; |
| __u32 sctl : 1; |
| __u32 eswf : 1; |
| __u32 cc : 2; |
| __u32 fmt : 1; |
| __u32 pfch : 1; |
| __u32 isic : 1; |
| __u32 alcc : 1; |
| __u32 ssi : 1; |
| __u32 zcc : 1; |
| __u32 ectl : 1; |
| __u32 pno : 1; |
| __u32 res : 1; |
| __u32 fctl : 3; |
| __u32 actl : 7; |
| __u32 stctl : 5; |
| __u32 cpa; |
| __u32 dstat : 8; |
| __u32 cstat : 8; |
| __u32 count : 16; |
| } __attribute__ ((packed)); |
| |
| /** |
| * struct tm_scsw - transport-mode subchannel status word |
| * @key: subchannel key |
| * @eswf: esw format |
| * @cc: deferred condition code |
| * @fmt: format |
| * @x: IRB-format control |
| * @q: interrogate-complete |
| * @ectl: extended control |
| * @pno: path not operational |
| * @fctl: function control |
| * @actl: activity control |
| * @stctl: status control |
| * @tcw: TCW address |
| * @dstat: device status |
| * @cstat: subchannel status |
| * @fcxs: FCX status |
| * @schxs: subchannel-extended status |
| */ |
| struct tm_scsw { |
| u32 key:4; |
| u32 :1; |
| u32 eswf:1; |
| u32 cc:2; |
| u32 fmt:3; |
| u32 x:1; |
| u32 q:1; |
| u32 :1; |
| u32 ectl:1; |
| u32 pno:1; |
| u32 :1; |
| u32 fctl:3; |
| u32 actl:7; |
| u32 stctl:5; |
| u32 tcw; |
| u32 dstat:8; |
| u32 cstat:8; |
| u32 fcxs:8; |
| u32 schxs:8; |
| } __attribute__ ((packed)); |
| |
| /** |
| * union scsw - subchannel status word |
| * @cmd: command-mode SCSW |
| * @tm: transport-mode SCSW |
| */ |
| union scsw { |
| struct cmd_scsw cmd; |
| struct tm_scsw tm; |
| } __attribute__ ((packed)); |
| |
| int scsw_is_tm(union scsw *scsw); |
| u32 scsw_key(union scsw *scsw); |
| u32 scsw_eswf(union scsw *scsw); |
| u32 scsw_cc(union scsw *scsw); |
| u32 scsw_ectl(union scsw *scsw); |
| u32 scsw_pno(union scsw *scsw); |
| u32 scsw_fctl(union scsw *scsw); |
| u32 scsw_actl(union scsw *scsw); |
| u32 scsw_stctl(union scsw *scsw); |
| u32 scsw_dstat(union scsw *scsw); |
| u32 scsw_cstat(union scsw *scsw); |
| int scsw_is_solicited(union scsw *scsw); |
| int scsw_is_valid_key(union scsw *scsw); |
| int scsw_is_valid_eswf(union scsw *scsw); |
| int scsw_is_valid_cc(union scsw *scsw); |
| int scsw_is_valid_ectl(union scsw *scsw); |
| int scsw_is_valid_pno(union scsw *scsw); |
| int scsw_is_valid_fctl(union scsw *scsw); |
| int scsw_is_valid_actl(union scsw *scsw); |
| int scsw_is_valid_stctl(union scsw *scsw); |
| int scsw_is_valid_dstat(union scsw *scsw); |
| int scsw_is_valid_cstat(union scsw *scsw); |
| int scsw_cmd_is_valid_key(union scsw *scsw); |
| int scsw_cmd_is_valid_sctl(union scsw *scsw); |
| int scsw_cmd_is_valid_eswf(union scsw *scsw); |
| int scsw_cmd_is_valid_cc(union scsw *scsw); |
| int scsw_cmd_is_valid_fmt(union scsw *scsw); |
| int scsw_cmd_is_valid_pfch(union scsw *scsw); |
| int scsw_cmd_is_valid_isic(union scsw *scsw); |
| int scsw_cmd_is_valid_alcc(union scsw *scsw); |
| int scsw_cmd_is_valid_ssi(union scsw *scsw); |
| int scsw_cmd_is_valid_zcc(union scsw *scsw); |
| int scsw_cmd_is_valid_ectl(union scsw *scsw); |
| int scsw_cmd_is_valid_pno(union scsw *scsw); |
| int scsw_cmd_is_valid_fctl(union scsw *scsw); |
| int scsw_cmd_is_valid_actl(union scsw *scsw); |
| int scsw_cmd_is_valid_stctl(union scsw *scsw); |
| int scsw_cmd_is_valid_dstat(union scsw *scsw); |
| int scsw_cmd_is_valid_cstat(union scsw *scsw); |
| int scsw_cmd_is_solicited(union scsw *scsw); |
| int scsw_tm_is_valid_key(union scsw *scsw); |
| int scsw_tm_is_valid_eswf(union scsw *scsw); |
| int scsw_tm_is_valid_cc(union scsw *scsw); |
| int scsw_tm_is_valid_fmt(union scsw *scsw); |
| int scsw_tm_is_valid_x(union scsw *scsw); |
| int scsw_tm_is_valid_q(union scsw *scsw); |
| int scsw_tm_is_valid_ectl(union scsw *scsw); |
| int scsw_tm_is_valid_pno(union scsw *scsw); |
| int scsw_tm_is_valid_fctl(union scsw *scsw); |
| int scsw_tm_is_valid_actl(union scsw *scsw); |
| int scsw_tm_is_valid_stctl(union scsw *scsw); |
| int scsw_tm_is_valid_dstat(union scsw *scsw); |
| int scsw_tm_is_valid_cstat(union scsw *scsw); |
| int scsw_tm_is_valid_fcxs(union scsw *scsw); |
| int scsw_tm_is_valid_schxs(union scsw *scsw); |
| int scsw_tm_is_solicited(union scsw *scsw); |
| |
| #define SCSW_FCTL_CLEAR_FUNC 0x1 |
| #define SCSW_FCTL_HALT_FUNC 0x2 |
| #define SCSW_FCTL_START_FUNC 0x4 |
| |
| #define SCSW_ACTL_SUSPENDED 0x1 |
| #define SCSW_ACTL_DEVACT 0x2 |
| #define SCSW_ACTL_SCHACT 0x4 |
| #define SCSW_ACTL_CLEAR_PEND 0x8 |
| #define SCSW_ACTL_HALT_PEND 0x10 |
| #define SCSW_ACTL_START_PEND 0x20 |
| #define SCSW_ACTL_RESUME_PEND 0x40 |
| |
| #define SCSW_STCTL_STATUS_PEND 0x1 |
| #define SCSW_STCTL_SEC_STATUS 0x2 |
| #define SCSW_STCTL_PRIM_STATUS 0x4 |
| #define SCSW_STCTL_INTER_STATUS 0x8 |
| #define SCSW_STCTL_ALERT_STATUS 0x10 |
| |
| #define DEV_STAT_ATTENTION 0x80 |
| #define DEV_STAT_STAT_MOD 0x40 |
| #define DEV_STAT_CU_END 0x20 |
| #define DEV_STAT_BUSY 0x10 |
| #define DEV_STAT_CHN_END 0x08 |
| #define DEV_STAT_DEV_END 0x04 |
| #define DEV_STAT_UNIT_CHECK 0x02 |
| #define DEV_STAT_UNIT_EXCEP 0x01 |
| |
| #define SCHN_STAT_PCI 0x80 |
| #define SCHN_STAT_INCORR_LEN 0x40 |
| #define SCHN_STAT_PROG_CHECK 0x20 |
| #define SCHN_STAT_PROT_CHECK 0x10 |
| #define SCHN_STAT_CHN_DATA_CHK 0x08 |
| #define SCHN_STAT_CHN_CTRL_CHK 0x04 |
| #define SCHN_STAT_INTF_CTRL_CHK 0x02 |
| #define SCHN_STAT_CHAIN_CHECK 0x01 |
| |
| /* |
| * architectured values for first sense byte |
| */ |
| #define SNS0_CMD_REJECT 0x80 |
| #define SNS_CMD_REJECT SNS0_CMD_REJEC |
| #define SNS0_INTERVENTION_REQ 0x40 |
| #define SNS0_BUS_OUT_CHECK 0x20 |
| #define SNS0_EQUIPMENT_CHECK 0x10 |
| #define SNS0_DATA_CHECK 0x08 |
| #define SNS0_OVERRUN 0x04 |
| #define SNS0_INCOMPL_DOMAIN 0x01 |
| |
| /* |
| * architectured values for second sense byte |
| */ |
| #define SNS1_PERM_ERR 0x80 |
| #define SNS1_INV_TRACK_FORMAT 0x40 |
| #define SNS1_EOC 0x20 |
| #define SNS1_MESSAGE_TO_OPER 0x10 |
| #define SNS1_NO_REC_FOUND 0x08 |
| #define SNS1_FILE_PROTECTED 0x04 |
| #define SNS1_WRITE_INHIBITED 0x02 |
| #define SNS1_INPRECISE_END 0x01 |
| |
| /* |
| * architectured values for third sense byte |
| */ |
| #define SNS2_REQ_INH_WRITE 0x80 |
| #define SNS2_CORRECTABLE 0x40 |
| #define SNS2_FIRST_LOG_ERR 0x20 |
| #define SNS2_ENV_DATA_PRESENT 0x10 |
| #define SNS2_INPRECISE_END 0x04 |
| |
| /** |
| * struct ccw1 - channel command word |
| * @cmd_code: command code |
| * @flags: flags, like IDA adressing, etc. |
| * @count: byte count |
| * @cda: data address |
| * |
| * The ccw is the basic structure to build channel programs that perform |
| * operations with the device or the control unit. Only Format-1 channel |
| * command words are supported. |
| */ |
| struct ccw1 { |
| __u8 cmd_code; |
| __u8 flags; |
| __u16 count; |
| __u32 cda; |
| } __attribute__ ((packed,aligned(8))); |
| |
| #define CCW_FLAG_DC 0x80 |
| #define CCW_FLAG_CC 0x40 |
| #define CCW_FLAG_SLI 0x20 |
| #define CCW_FLAG_SKIP 0x10 |
| #define CCW_FLAG_PCI 0x08 |
| #define CCW_FLAG_IDA 0x04 |
| #define CCW_FLAG_SUSPEND 0x02 |
| |
| #define CCW_CMD_READ_IPL 0x02 |
| #define CCW_CMD_NOOP 0x03 |
| #define CCW_CMD_BASIC_SENSE 0x04 |
| #define CCW_CMD_TIC 0x08 |
| #define CCW_CMD_STLCK 0x14 |
| #define CCW_CMD_SENSE_PGID 0x34 |
| #define CCW_CMD_SUSPEND_RECONN 0x5B |
| #define CCW_CMD_RDC 0x64 |
| #define CCW_CMD_RELEASE 0x94 |
| #define CCW_CMD_SET_PGID 0xAF |
| #define CCW_CMD_SENSE_ID 0xE4 |
| #define CCW_CMD_DCTL 0xF3 |
| |
| #define SENSE_MAX_COUNT 0x20 |
| |
| /** |
| * struct erw - extended report word |
| * @res0: reserved |
| * @auth: authorization check |
| * @pvrf: path-verification-required flag |
| * @cpt: channel-path timeout |
| * @fsavf: failing storage address validity flag |
| * @cons: concurrent sense |
| * @scavf: secondary ccw address validity flag |
| * @fsaf: failing storage address format |
| * @scnt: sense count, if @cons == %1 |
| * @res16: reserved |
| */ |
| struct erw { |
| __u32 res0 : 3; |
| __u32 auth : 1; |
| __u32 pvrf : 1; |
| __u32 cpt : 1; |
| __u32 fsavf : 1; |
| __u32 cons : 1; |
| __u32 scavf : 1; |
| __u32 fsaf : 1; |
| __u32 scnt : 6; |
| __u32 res16 : 16; |
| } __attribute__ ((packed)); |
| |
| /** |
| * struct sublog - subchannel logout area |
| * @res0: reserved |
| * @esf: extended status flags |
| * @lpum: last path used mask |
| * @arep: ancillary report |
| * @fvf: field-validity flags |
| * @sacc: storage access code |
| * @termc: termination code |
| * @devsc: device-status check |
| * @serr: secondary error |
| * @ioerr: i/o-error alert |
| * @seqc: sequence code |
| */ |
| struct sublog { |
| __u32 res0 : 1; |
| __u32 esf : 7; |
| __u32 lpum : 8; |
| __u32 arep : 1; |
| __u32 fvf : 5; |
| __u32 sacc : 2; |
| __u32 termc : 2; |
| __u32 devsc : 1; |
| __u32 serr : 1; |
| __u32 ioerr : 1; |
| __u32 seqc : 3; |
| } __attribute__ ((packed)); |
| |
| /** |
| * struct esw0 - Format 0 Extended Status Word (ESW) |
| * @sublog: subchannel logout |
| * @erw: extended report word |
| * @faddr: failing storage address |
| * @saddr: secondary ccw address |
| */ |
| struct esw0 { |
| struct sublog sublog; |
| struct erw erw; |
| __u32 faddr[2]; |
| __u32 saddr; |
| } __attribute__ ((packed)); |
| |
| /** |
| * struct esw1 - Format 1 Extended Status Word (ESW) |
| * @zero0: reserved zeros |
| * @lpum: last path used mask |
| * @zero16: reserved zeros |
| * @erw: extended report word |
| * @zeros: three fullwords of zeros |
| */ |
| struct esw1 { |
| __u8 zero0; |
| __u8 lpum; |
| __u16 zero16; |
| struct erw erw; |
| __u32 zeros[3]; |
| } __attribute__ ((packed)); |
| |
| /** |
| * struct esw2 - Format 2 Extended Status Word (ESW) |
| * @zero0: reserved zeros |
| * @lpum: last path used mask |
| * @dcti: device-connect-time interval |
| * @erw: extended report word |
| * @zeros: three fullwords of zeros |
| */ |
| struct esw2 { |
| __u8 zero0; |
| __u8 lpum; |
| __u16 dcti; |
| struct erw erw; |
| __u32 zeros[3]; |
| } __attribute__ ((packed)); |
| |
| /** |
| * struct esw3 - Format 3 Extended Status Word (ESW) |
| * @zero0: reserved zeros |
| * @lpum: last path used mask |
| * @res: reserved |
| * @erw: extended report word |
| * @zeros: three fullwords of zeros |
| */ |
| struct esw3 { |
| __u8 zero0; |
| __u8 lpum; |
| __u16 res; |
| struct erw erw; |
| __u32 zeros[3]; |
| } __attribute__ ((packed)); |
| |
| /** |
| * struct irb - interruption response block |
| * @scsw: subchannel status word |
| * @esw: extened status word, 4 formats |
| * @ecw: extended control word |
| * |
| * The irb that is handed to the device driver when an interrupt occurs. For |
| * solicited interrupts, the common I/O layer already performs checks whether |
| * a field is valid; a field not being valid is always passed as %0. |
| * If a unit check occured, @ecw may contain sense data; this is retrieved |
| * by the common I/O layer itself if the device doesn't support concurrent |
| * sense (so that the device driver never needs to perform basic sene itself). |
| * For unsolicited interrupts, the irb is passed as-is (expect for sense data, |
| * if applicable). |
| */ |
| struct irb { |
| union scsw scsw; |
| union { |
| struct esw0 esw0; |
| struct esw1 esw1; |
| struct esw2 esw2; |
| struct esw3 esw3; |
| } esw; |
| __u8 ecw[32]; |
| } __attribute__ ((packed,aligned(4))); |
| |
| /** |
| * struct ciw - command information word (CIW) layout |
| * @et: entry type |
| * @reserved: reserved bits |
| * @ct: command type |
| * @cmd: command code |
| * @count: command count |
| */ |
| struct ciw { |
| __u32 et : 2; |
| __u32 reserved : 2; |
| __u32 ct : 4; |
| __u32 cmd : 8; |
| __u32 count : 16; |
| } __attribute__ ((packed)); |
| |
| #define CIW_TYPE_RCD 0x0 /* read configuration data */ |
| #define CIW_TYPE_SII 0x1 /* set interface identifier */ |
| #define CIW_TYPE_RNI 0x2 /* read node identifier */ |
| |
| /* |
| * Flags used as input parameters for do_IO() |
| */ |
| #define DOIO_ALLOW_SUSPEND 0x0001 /* allow for channel prog. suspend */ |
| #define DOIO_DENY_PREFETCH 0x0002 /* don't allow for CCW prefetch */ |
| #define DOIO_SUPPRESS_INTER 0x0004 /* suppress intermediate inter. */ |
| /* ... for suspended CCWs */ |
| /* Device or subchannel gone. */ |
| #define CIO_GONE 0x0001 |
| /* No path to device. */ |
| #define CIO_NO_PATH 0x0002 |
| /* Device has appeared. */ |
| #define CIO_OPER 0x0004 |
| /* Sick revalidation of device. */ |
| #define CIO_REVALIDATE 0x0008 |
| |
| /** |
| * struct ccw_dev_id - unique identifier for ccw devices |
| * @ssid: subchannel set id |
| * @devno: device number |
| * |
| * This structure is not directly based on any hardware structure. The |
| * hardware identifies a device by its device number and its subchannel, |
| * which is in turn identified by its id. In order to get a unique identifier |
| * for ccw devices across subchannel sets, @struct ccw_dev_id has been |
| * introduced. |
| */ |
| struct ccw_dev_id { |
| u8 ssid; |
| u16 devno; |
| }; |
| |
| /** |
| * ccw_device_id_is_equal() - compare two ccw_dev_ids |
| * @dev_id1: a ccw_dev_id |
| * @dev_id2: another ccw_dev_id |
| * Returns: |
| * %1 if the two structures are equal field-by-field, |
| * %0 if not. |
| * Context: |
| * any |
| */ |
| static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1, |
| struct ccw_dev_id *dev_id2) |
| { |
| if ((dev_id1->ssid == dev_id2->ssid) && |
| (dev_id1->devno == dev_id2->devno)) |
| return 1; |
| return 0; |
| } |
| |
| extern void wait_cons_dev(void); |
| |
| extern void css_schedule_reprobe(void); |
| |
| extern void reipl_ccw_dev(struct ccw_dev_id *id); |
| |
| struct cio_iplinfo { |
| u16 devno; |
| int is_qdio; |
| }; |
| |
| extern int cio_get_iplinfo(struct cio_iplinfo *iplinfo); |
| |
| /* Function from drivers/s390/cio/chsc.c */ |
| int chsc_sstpc(void *page, unsigned int op, u16 ctrl); |
| int chsc_sstpi(void *page, void *result, size_t size); |
| |
| #endif |
| |
| #endif |
