/* SPDX-License-Identifier: GPL-2.0 */ /* * Common interface for I/O on S/390 */ #ifndef _ASM_S390_CIO_H_ #define _ASM_S390_CIO_H_ #include <linux/spinlock.h> #include <linux/bitops.h> #include <asm/types.h> #define LPM_ANYPATH 0xff #define __MAX_CSSID 0 #define __MAX_SUBCHANNEL 65535 #define __MAX_SSID 3 #include <asm/scsw.h> /** * struct ccw1 - channel command word * @cmd_code: command code * @flags: flags, like IDA addressing, 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))); /** * struct ccw0 - channel command word * @cmd_code: command code * @cda: data address * @flags: flags, like IDA addressing, etc. * @reserved: will be ignored * @count: byte count * * The format-0 ccw structure. */ struct ccw0 { __u8 cmd_code; __u32 cda : 24; __u8 flags; __u8 reserved; __u16 count; } __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 erw_eadm - EADM Subchannel extended report word * @b: aob error * @r: arsb error */ struct erw_eadm { __u32 : 16; __u32 b : 1; __u32 r : 1; __u32 : 14; } __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 esw_eadm - EADM Subchannel Extended Status Word (ESW) * @sublog: subchannel logout * @erw: extended report word */ struct esw_eadm { __u32 sublog; struct erw_eadm erw; __u32 : 32; __u32 : 32; __u32 : 32; } __packed; /** * struct irb - interruption response block * @scsw: subchannel status word * @esw: extended status word * @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 occurred, @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; struct esw_eadm eadm; } 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 /* Device did not respond in time. */ #define CIO_BOXED 0x0010 /** * 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; } /** * pathmask_to_pos() - find the position of the left-most bit in a pathmask * @mask: pathmask with at least one bit set */ static inline u8 pathmask_to_pos(u8 mask) { return 8 - ffs(mask); } void channel_subsystem_reinit(void); extern void css_schedule_reprobe(void); extern void reipl_ccw_dev(struct ccw_dev_id *id); struct cio_iplinfo { u8 ssid; 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, u64 *clock_delta); int chsc_sstpi(void *page, void *result, size_t size); #endif
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fpu | Folder | 0755 |
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trace | Folder | 0755 |
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Kbuild | File | 557 B | 0644 |
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airq.h | File | 3.02 KB | 0644 |
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alternative-asm.h | File | 3.07 KB | 0644 |
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alternative.h | File | 4.99 KB | 0644 |
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ap.h | File | 9.9 KB | 0644 |
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appldata.h | File | 1.54 KB | 0644 |
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archrandom.h | File | 1.17 KB | 0644 |
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asm-prototypes.h | File | 227 B | 0644 |
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atomic.h | File | 5.1 KB | 0644 |
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atomic_ops.h | File | 4.02 KB | 0644 |
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barrier.h | File | 1.84 KB | 0644 |
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bitops.h | File | 10.13 KB | 0644 |
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bug.h | File | 1.49 KB | 0644 |
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bugs.h | File | 441 B | 0644 |
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cache.h | File | 387 B | 0644 |
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ccwdev.h | File | 7.99 KB | 0644 |
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ccwgroup.h | File | 2.53 KB | 0644 |
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checksum.h | File | 3.24 KB | 0644 |
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chpid.h | File | 974 B | 0644 |
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cio.h | File | 8.01 KB | 0644 |
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clp.h | File | 1.32 KB | 0644 |
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cmb.h | File | 425 B | 0644 |
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cmpxchg.h | File | 1.76 KB | 0644 |
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compat.h | File | 7.9 KB | 0644 |
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cpacf.h | File | 16.8 KB | 0644 |
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cpcmd.h | File | 1.11 KB | 0644 |
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cpu.h | File | 549 B | 0644 |
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cpu_mf.h | File | 8.99 KB | 0644 |
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cpufeature.h | File | 963 B | 0644 |
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cputime.h | File | 805 B | 0644 |
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crw.h | File | 1.86 KB | 0644 |
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css_chars.h | File | 769 B | 0644 |
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ctl_reg.h | File | 2.89 KB | 0644 |
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current.h | File | 405 B | 0644 |
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debug.h | File | 8.1 KB | 0644 |
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delay.h | File | 721 B | 0644 |
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diag.h | File | 5.94 KB | 0644 |
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dis.h | File | 637 B | 0644 |
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dma-mapping.h | File | 621 B | 0644 |
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dma.h | File | 456 B | 0644 |
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eadm.h | File | 2.03 KB | 0644 |
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ebcdic.h | File | 1.41 KB | 0644 |
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elf.h | File | 10.36 KB | 0644 |
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exec.h | File | 269 B | 0644 |
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extable.h | File | 875 B | 0644 |
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extmem.h | File | 804 B | 0644 |
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facility.h | File | 2.44 KB | 0644 |
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fcx.h | File | 7.91 KB | 0644 |
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ftrace.h | File | 1.66 KB | 0644 |
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futex.h | File | 2.09 KB | 0644 |
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gmap.h | File | 4.93 KB | 0644 |
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hardirq.h | File | 670 B | 0644 |
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hugetlb.h | File | 2.87 KB | 0644 |
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hw_irq.h | File | 249 B | 0644 |
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idals.h | File | 5.22 KB | 0644 |
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idle.h | File | 709 B | 0644 |
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io.h | File | 2.03 KB | 0644 |
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ipl.h | File | 3.6 KB | 0644 |
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irq.h | File | 2.55 KB | 0644 |
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irqflags.h | File | 1.76 KB | 0644 |
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isc.h | File | 1000 B | 0644 |
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itcw.h | File | 950 B | 0644 |
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jump_label.h | File | 1.36 KB | 0644 |
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kdebug.h | File | 386 B | 0644 |
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kexec.h | File | 1.32 KB | 0644 |
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kprobes.h | File | 2.24 KB | 0644 |
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kvm_host.h | File | 22.24 KB | 0644 |
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kvm_para.h | File | 5.78 KB | 0644 |
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linkage.h | File | 633 B | 0644 |
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livepatch.h | File | 461 B | 0644 |
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lowcore.h | File | 6.29 KB | 0644 |
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mmu.h | File | 1.19 KB | 0644 |
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mmu_context.h | File | 3.84 KB | 0644 |
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mmzone.h | File | 316 B | 0644 |
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module.h | File | 802 B | 0644 |
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nmi.h | File | 3.44 KB | 0644 |
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nospec-branch.h | File | 342 B | 0644 |
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nospec-insn.h | File | 3.81 KB | 0644 |
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numa.h | File | 730 B | 0644 |
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os_info.h | File | 1.1 KB | 0644 |
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page-states.h | File | 486 B | 0644 |
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page.h | File | 5.12 KB | 0644 |
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pci.h | File | 6.26 KB | 0644 |
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pci_clp.h | File | 4.25 KB | 0644 |
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pci_debug.h | File | 608 B | 0644 |
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pci_dma.h | File | 5.7 KB | 0644 |
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pci_insn.h | File | 2.59 KB | 0644 |
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pci_io.h | File | 4.58 KB | 0644 |
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percpu.h | File | 6.44 KB | 0644 |
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perf_event.h | File | 2.71 KB | 0644 |
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pgalloc.h | File | 4.32 KB | 0644 |
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pgtable.h | File | 47.7 KB | 0644 |
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pkey.h | File | 4.23 KB | 0644 |
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preempt.h | File | 3.25 KB | 0644 |
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processor.h | File | 10.42 KB | 0644 |
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ptrace.h | File | 5.27 KB | 0644 |
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qdio.h | File | 11.67 KB | 0644 |
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reset.h | File | 471 B | 0644 |
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runtime_instr.h | File | 1.76 KB | 0644 |
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schid.h | File | 525 B | 0644 |
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sclp.h | File | 3.38 KB | 0644 |
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scsw.h | File | 24.1 KB | 0644 |
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seccomp.h | File | 516 B | 0644 |
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sections.h | File | 155 B | 0644 |
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segment.h | File | 93 B | 0644 |
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serial.h | File | 147 B | 0644 |
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set_memory.h | File | 779 B | 0644 |
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setup.h | File | 4.44 KB | 0644 |
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shmparam.h | File | 285 B | 0644 |
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signal.h | File | 644 B | 0644 |
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sigp.h | File | 1.8 KB | 0644 |
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smp.h | File | 2.45 KB | 0644 |
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sparsemem.h | File | 214 B | 0644 |
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spinlock.h | File | 3.53 KB | 0644 |
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spinlock_types.h | File | 437 B | 0644 |
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stp.h | File | 1.26 KB | 0644 |
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string.h | File | 4.5 KB | 0644 |
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switch_to.h | File | 1.37 KB | 0644 |
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syscall.h | File | 2.63 KB | 0644 |
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sysinfo.h | File | 4.22 KB | 0644 |
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termios.h | File | 685 B | 0644 |
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thread_info.h | File | 3.15 KB | 0644 |
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timex.h | File | 6.15 KB | 0644 |
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tlb.h | File | 5.71 KB | 0644 |
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tlbflush.h | File | 3.52 KB | 0644 |
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topology.h | File | 2.69 KB | 0644 |
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uaccess.h | File | 6.57 KB | 0644 |
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unistd.h | File | 1.03 KB | 0644 |
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uprobes.h | File | 588 B | 0644 |
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user.h | File | 3.3 KB | 0644 |
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vdso.h | File | 1.8 KB | 0644 |
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vga.h | File | 170 B | 0644 |
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vtime.h | File | 182 B | 0644 |
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vtimer.h | File | 866 B | 0644 |
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vx-insn.h | File | 10.66 KB | 0644 |
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xor.h | File | 454 B | 0644 |
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