/* 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/bitops.h> #include <linux/genalloc.h> #include <asm/dma-types.h> #include <asm/types.h> #include <asm/tpi.h> #define LPM_ANYPATH 0xff #define __MAX_CSSID 0 #define __MAX_SUBCHANNEL 65535 #define __MAX_SSID 3 #include <asm/scsw.h> #define CCW_MAX_BYTE_COUNT 65535 /** * 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; dma32_t 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; dma32_t faddr[2]; dma32_t 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 sense 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 */ /* * Node Descriptor as defined in SA22-7204, "Common I/O-Device Commands" */ #define ND_VALIDITY_VALID 0 #define ND_VALIDITY_OUTDATED 1 #define ND_VALIDITY_INVALID 2 struct node_descriptor { /* Flags. */ union { struct { u32 validity:3; u32 reserved:5; } __packed; u8 byte0; } __packed; /* Node parameters. */ u32 params:24; /* Node ID. */ char type[6]; char model[3]; char manufacturer[3]; char plant[2]; char seq[12]; u16 tag; } __packed; /* * 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_dev_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); } extern void css_schedule_reprobe(void); extern void *cio_dma_zalloc(size_t size); extern void cio_dma_free(void *cpu_addr, size_t size); extern struct device *cio_get_dma_css_dev(void); void *cio_gp_dma_zalloc(struct gen_pool *gp_dma, struct device *dma_dev, size_t size); void *__cio_gp_dma_zalloc(struct gen_pool *gp_dma, struct device *dma_dev, size_t size, dma32_t *dma_handle); void cio_gp_dma_free(struct gen_pool *gp_dma, void *cpu_addr, size_t size); void cio_gp_dma_destroy(struct gen_pool *gp_dma, struct device *dma_dev); struct gen_pool *cio_gp_dma_create(struct device *dma_dev, int nr_pages); /* Function from drivers/s390/cio/chsc.c */ int chsc_sstpc(void *page, unsigned int op, u16 ctrl, long *clock_delta); int chsc_sstpi(void *page, void *result, size_t size); int chsc_stzi(void *page, void *result, size_t size); int chsc_sgib(u32 origin); int chsc_scud(u16 cu, u64 *esm, u8 *esm_valid); #endif
