forked from Minki/linux
83b3370c79
Use a bitmap for indicating which subchannels require evaluation instead of allocating memory for each evaluation request. This approach reduces memory consumption during recovery in case of massive evaluation request occurrence and removes the need for memory allocation failure handling. Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
87 lines
1.8 KiB
C
87 lines
1.8 KiB
C
#ifndef S390_CHSC_H
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#define S390_CHSC_H
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#include <linux/types.h>
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#include <linux/device.h>
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#include <asm/chpid.h>
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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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} __attribute__ ((packed));
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#define NR_MEASUREMENT_CHARS 5
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struct cmg_chars {
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u32 values[NR_MEASUREMENT_CHARS];
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} __attribute__ ((packed));
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#define NR_MEASUREMENT_ENTRIES 8
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struct cmg_entry {
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u32 values[NR_MEASUREMENT_ENTRIES];
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} __attribute__ ((packed));
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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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} __attribute__ ((packed));
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struct channel_path;
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extern int css_get_ssd_info(struct subchannel *);
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extern void chsc_process_crw(void);
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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 : 20;
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u32 secm : 1; /* bit 84 */
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u32 : 1;
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u32 scmc : 1; /* bit 86 */
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u32 : 20;
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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 int chsc_enable_facility(int);
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struct channel_subsystem;
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extern int chsc_secm(struct channel_subsystem *, int);
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int chsc_chp_vary(struct chp_id chpid, int on);
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int chsc_determine_channel_path_description(struct chp_id chpid,
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struct channel_path_desc *desc);
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void chsc_chp_online(struct chp_id chpid);
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void chsc_chp_offline(struct chp_id chpid);
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int chsc_get_channel_measurement_chars(struct channel_path *chp);
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#endif
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