mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 19:26:51 +07:00
96e5aaf914
This allows device drivers (eg. qeth) to use the struct when processing information retrieved via RCD. Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com> Acked-by: Sebastian Ott <sebott@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
378 lines
8.8 KiB
C
378 lines
8.8 KiB
C
/* 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 <linux/genalloc.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 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_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 *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_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, u64 *clock_delta);
|
|
int chsc_sstpi(void *page, void *result, size_t size);
|
|
int chsc_sgib(u32 origin);
|
|
|
|
#endif
|