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 struct mto mto; 49 } __attribute__((packed)); 50 51 struct msg_buf { 52 struct evbuf_header header; 53 struct mdb mdb; 54 } __attribute__((packed)); 55 56 /* The number of empty mto buffers that can be contained in a single sccb. */ 57 #define NR_EMPTY_MSG_PER_SCCB ((PAGE_SIZE - sizeof(struct sclp_buffer) - \ 58 sizeof(struct sccb_header)) / sizeof(struct msg_buf)) 59 60 /* 61 * data structure for information about list of SCCBs (only for writing), 62 * will be located at the end of a SCCBs page 63 */ 64 struct sclp_buffer { 65 struct list_head list; /* list_head for sccb_info chain */ 66 struct sclp_req request; 67 void *sccb; 68 struct msg_buf *current_msg; 69 char *current_line; 70 int current_length; 71 int retry_count; 72 /* output format settings */ 73 unsigned short columns; 74 unsigned short htab; 75 /* statistics about this buffer */ 76 unsigned int char_sum; /* # chars in sccb */ 77 unsigned int messages; /* # messages in sccb */ 78 /* Callback that is called after reaching final status. */ 79 void (*callback)(struct sclp_buffer *, int); 80 }; 81 82 int sclp_rw_init(void); 83 struct sclp_buffer *sclp_make_buffer(void *, unsigned short, unsigned short); 84 void *sclp_unmake_buffer(struct sclp_buffer *); 85 int sclp_buffer_space(struct sclp_buffer *); 86 int sclp_write(struct sclp_buffer *buffer, const unsigned char *, int); 87 int sclp_emit_buffer(struct sclp_buffer *,void (*)(struct sclp_buffer *,int)); 88 void sclp_set_columns(struct sclp_buffer *, unsigned short); 89 void sclp_set_htab(struct sclp_buffer *, unsigned short); 90 int sclp_chars_in_buffer(struct sclp_buffer *); 91 92 #ifdef CONFIG_SCLP_CONSOLE 93 void sclp_console_pm_event(enum sclp_pm_event sclp_pm_event); 94 #else 95 static inline void sclp_console_pm_event(enum sclp_pm_event sclp_pm_event) { } 96 #endif 97 98 #endif /* __SCLP_RW_H__ */ 99