1 /* 2 * interface to the SCLP-read/write driver 3 * 4 * Copyright IBM Corporation 1999, 2009 5 * 6 * Author(s): Martin Peschke <mpeschke@de.ibm.com> 7 * Martin Schwidefsky <schwidefsky@de.ibm.com> 8 */ 9 10 #ifndef __SCLP_RW_H__ 11 #define __SCLP_RW_H__ 12 13 #include <linux/list.h> 14 15 struct mto { 16 u16 length; 17 u16 type; 18 u16 line_type_flags; 19 u8 alarm_control; 20 u8 _reserved[3]; 21 } __attribute__((packed)); 22 23 struct go { 24 u16 length; 25 u16 type; 26 u32 domid; 27 u8 hhmmss_time[8]; 28 u8 th_time[3]; 29 u8 reserved_0; 30 u8 dddyyyy_date[7]; 31 u8 _reserved_1; 32 u16 general_msg_flags; 33 u8 _reserved_2[10]; 34 u8 originating_system_name[8]; 35 u8 job_guest_name[8]; 36 } __attribute__((packed)); 37 38 struct mdb_header { 39 u16 length; 40 u16 type; 41 u32 tag; 42 u32 revision_code; 43 } __attribute__((packed)); 44 45 struct mdb { 46 struct mdb_header header; 47 struct go go; 48 } __attribute__((packed)); 49 50 struct msg_buf { 51 struct evbuf_header header; 52 struct mdb mdb; 53 } __attribute__((packed)); 54 55 struct write_sccb { 56 struct sccb_header header; 57 struct msg_buf msg_buf; 58 } __attribute__((packed)); 59 60 /* The number of empty mto buffers that can be contained in a single sccb. */ 61 #define NR_EMPTY_MTO_PER_SCCB ((PAGE_SIZE - sizeof(struct sclp_buffer) - \ 62 sizeof(struct write_sccb)) / sizeof(struct mto)) 63 64 /* 65 * data structure for information about list of SCCBs (only for writing), 66 * will be located at the end of a SCCBs page 67 */ 68 struct sclp_buffer { 69 struct list_head list; /* list_head for sccb_info chain */ 70 struct sclp_req request; 71 struct write_sccb *sccb; 72 char *current_line; 73 int current_length; 74 int retry_count; 75 /* output format settings */ 76 unsigned short columns; 77 unsigned short htab; 78 /* statistics about this buffer */ 79 unsigned int mto_char_sum; /* # chars in sccb */ 80 unsigned int mto_number; /* # mtos in sccb */ 81 /* Callback that is called after reaching final status. */ 82 void (*callback)(struct sclp_buffer *, int); 83 }; 84 85 int sclp_rw_init(void); 86 struct sclp_buffer *sclp_make_buffer(void *, unsigned short, unsigned short); 87 void *sclp_unmake_buffer(struct sclp_buffer *); 88 int sclp_buffer_space(struct sclp_buffer *); 89 int sclp_write(struct sclp_buffer *buffer, const unsigned char *, int); 90 int sclp_emit_buffer(struct sclp_buffer *,void (*)(struct sclp_buffer *,int)); 91 void sclp_set_columns(struct sclp_buffer *, unsigned short); 92 void sclp_set_htab(struct sclp_buffer *, unsigned short); 93 int sclp_chars_in_buffer(struct sclp_buffer *); 94 95 #ifdef CONFIG_SCLP_CONSOLE 96 void sclp_console_pm_event(enum sclp_pm_event sclp_pm_event); 97 #else 98 static inline void sclp_console_pm_event(enum sclp_pm_event sclp_pm_event) { } 99 #endif 100 101 #endif /* __SCLP_RW_H__ */ 102