fb6958a594
Add support for multiple subchannel sets. Works with arbitrary devices in subchannel set 1 and is transparent to device drivers. Although currently only two subchannel sets are available, this will work with the architectured maximum number of subchannel sets as well. Signed-off-by: Cornelia Huck <cohuck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
74 lines
1.4 KiB
C
74 lines
1.4 KiB
C
#ifndef S390_CHSC_H
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#define S390_CHSC_H
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#define CHSC_SEI_ACC_CHPID 1
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#define CHSC_SEI_ACC_LINKADDR 2
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#define CHSC_SEI_ACC_FULLLINKADDR 3
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#define CHSC_SDA_OC_MSS 0x2
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struct chsc_header {
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u16 length;
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u16 code;
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};
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struct channel_path_desc {
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u8 flags;
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u8 lsn;
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u8 desc;
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u8 chpid;
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u8 swla;
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u8 zeroes;
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u8 chla;
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u8 chpp;
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};
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struct channel_path {
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int id;
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int state;
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struct channel_path_desc desc;
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struct device dev;
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};
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extern void s390_process_css( void );
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extern void chsc_validate_chpids(struct subchannel *);
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extern void chpid_is_actually_online(int);
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struct css_general_char {
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u64 : 41;
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u32 aif : 1; /* bit 41 */
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u32 : 3;
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u32 mcss : 1; /* bit 45 */
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u32 : 2;
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u32 ext_mb : 1; /* bit 48 */
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u32 : 7;
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u32 aif_tdd : 1; /* bit 56 */
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u32 : 1;
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u32 qebsm : 1; /* bit 58 */
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u32 : 8;
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u32 aif_osa : 1; /* bit 67 */
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u32 : 28;
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}__attribute__((packed));
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struct css_chsc_char {
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u64 res;
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u64 : 43;
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u32 scssc : 1; /* bit 107 */
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u32 scsscf : 1; /* bit 108 */
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u32 : 19;
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}__attribute__((packed));
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extern struct css_general_char css_general_characteristics;
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extern struct css_chsc_char css_chsc_characteristics;
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extern int chsc_determine_css_characteristics(void);
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extern int css_characteristics_avail;
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extern void *chsc_get_chp_desc(struct subchannel*, int);
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extern int chsc_enable_facility(int);
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#define to_channelpath(dev) container_of(dev, struct channel_path, dev)
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#endif
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