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- /* SPDX-License-Identifier: GPL-2.0 */
- /*
- * interface to the SCLP-read/write driver
- *
- * Copyright IBM Corporation 1999, 2009
- *
- * Author(s): Martin Peschke <mpeschke@de.ibm.com>
- * Martin Schwidefsky <schwidefsky@de.ibm.com>
- */
- #ifndef __SCLP_RW_H__
- #define __SCLP_RW_H__
- #include <linux/list.h>
- struct mto {
- u16 length;
- u16 type;
- u16 line_type_flags;
- u8 alarm_control;
- u8 _reserved[3];
- } __attribute__((packed));
- struct go {
- u16 length;
- u16 type;
- u32 domid;
- u8 hhmmss_time[8];
- u8 th_time[3];
- u8 reserved_0;
- u8 dddyyyy_date[7];
- u8 _reserved_1;
- u16 general_msg_flags;
- u8 _reserved_2[10];
- u8 originating_system_name[8];
- u8 job_guest_name[8];
- } __attribute__((packed));
- struct mdb_header {
- u16 length;
- u16 type;
- u32 tag;
- u32 revision_code;
- } __attribute__((packed));
- struct mdb {
- struct mdb_header header;
- struct go go;
- struct mto mto;
- } __attribute__((packed));
- struct msg_buf {
- struct evbuf_header header;
- struct mdb mdb;
- } __attribute__((packed));
- /* The number of empty mto buffers that can be contained in a single sccb. */
- #define NR_EMPTY_MSG_PER_SCCB ((PAGE_SIZE - sizeof(struct sclp_buffer) - \
- sizeof(struct sccb_header)) / sizeof(struct msg_buf))
- /*
- * data structure for information about list of SCCBs (only for writing),
- * will be located at the end of a SCCBs page
- */
- struct sclp_buffer {
- struct list_head list; /* list_head for sccb_info chain */
- struct sclp_req request;
- void *sccb;
- struct msg_buf *current_msg;
- char *current_line;
- int current_length;
- int retry_count;
- /* output format settings */
- unsigned short columns;
- unsigned short htab;
- /* statistics about this buffer */
- unsigned int char_sum; /* # chars in sccb */
- unsigned int messages; /* # messages in sccb */
- /* Callback that is called after reaching final status. */
- void (*callback)(struct sclp_buffer *, int);
- };
- int sclp_rw_init(void);
- struct sclp_buffer *sclp_make_buffer(void *, unsigned short, unsigned short);
- void *sclp_unmake_buffer(struct sclp_buffer *);
- int sclp_buffer_space(struct sclp_buffer *);
- int sclp_write(struct sclp_buffer *buffer, const unsigned char *, int);
- int sclp_emit_buffer(struct sclp_buffer *,void (*)(struct sclp_buffer *,int));
- unsigned int sclp_chars_in_buffer(struct sclp_buffer *);
- #endif /* __SCLP_RW_H__ */
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