/* * drivers/s390/char/sclp_rw.h * interface to the SCLP-read/write driver * * S390 version * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation * 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; } __attribute__((packed)); struct msg_buf { struct evbuf_header header; struct mdb mdb; } __attribute__((packed)); struct write_sccb { struct sccb_header header; struct msg_buf msg_buf; } __attribute__((packed)); /* The number of empty mto buffers that can be contained in a single sccb. */ #define NR_EMPTY_MTO_PER_SCCB ((PAGE_SIZE - sizeof(struct sclp_buffer) - \ sizeof(struct write_sccb)) / sizeof(struct mto)) /* * 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; struct write_sccb *sccb; char *current_line; int current_length; int retry_count; /* output format settings */ unsigned short columns; unsigned short htab; /* statistics about this buffer */ unsigned int mto_char_sum; /* # chars in sccb */ unsigned int mto_number; /* # mtos 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)); void sclp_set_columns(struct sclp_buffer *, unsigned short); void sclp_set_htab(struct sclp_buffer *, unsigned short); int sclp_chars_in_buffer(struct sclp_buffer *); #endif /* __SCLP_RW_H__ */