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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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906c9768c7
chsc_determine_channel_path_desc is called by a wrapper who allocates a response struct. The response data is then memcpy'ed to this response struct by chsc_determine_channel_path_desc. Change chsc_determine_base_channel_path_desc to use the global chsc_page and deliver it to the function doing the actual chsc call. The channel path desriptor is then directly read from the response data. As a result we get rid of the additional allocation for the response struct. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
104 lines
2.2 KiB
C
104 lines
2.2 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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#include <asm/chsc.h>
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#include <asm/schid.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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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_chsc_char css_chsc_characteristics;
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struct chsc_ssd_info {
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u8 path_mask;
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u8 fla_valid_mask;
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struct chp_id chpid[8];
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u16 fla[8];
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};
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struct chsc_scpd {
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struct chsc_header request;
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u32:2;
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u32 m:1;
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u32 c:1;
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u32 fmt:4;
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u32 cssid:8;
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u32:4;
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u32 rfmt:4;
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u32 first_chpid:8;
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u32:24;
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u32 last_chpid:8;
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u32 zeroes1;
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struct chsc_header response;
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u8 data[PAGE_SIZE - 20];
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} __attribute__ ((packed));
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extern int chsc_get_ssd_info(struct subchannel_id schid,
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struct chsc_ssd_info *ssd);
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extern int chsc_determine_css_characteristics(void);
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extern int chsc_init(void);
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extern void chsc_init_cleanup(void);
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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_do_secm(struct channel_subsystem *css, int enable);
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int chsc_chp_vary(struct chp_id chpid, int on);
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int chsc_determine_channel_path_desc(struct chp_id chpid, int fmt, int rfmt,
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int c, int m, void *page);
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int chsc_determine_base_channel_path_desc(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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int chsc_error_from_response(int response);
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int chsc_siosl(struct subchannel_id schid);
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#endif
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