linux/arch/s390/include/asm/eadm.h
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   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _ASM_S390_EADM_H
   3#define _ASM_S390_EADM_H
   4
   5#include <linux/types.h>
   6#include <linux/device.h>
   7#include <linux/blk_types.h>
   8
   9struct arqb {
  10        u64 data;
  11        u16 fmt:4;
  12        u16:12;
  13        u16 cmd_code;
  14        u16:16;
  15        u16 msb_count;
  16        u32 reserved[12];
  17} __packed;
  18
  19#define ARQB_CMD_MOVE   1
  20
  21struct arsb {
  22        u16 fmt:4;
  23        u32:28;
  24        u8 ef;
  25        u8:8;
  26        u8 ecbi;
  27        u8:8;
  28        u8 fvf;
  29        u16:16;
  30        u8 eqc;
  31        u32:32;
  32        u64 fail_msb;
  33        u64 fail_aidaw;
  34        u64 fail_ms;
  35        u64 fail_scm;
  36        u32 reserved[4];
  37} __packed;
  38
  39#define EQC_WR_PROHIBIT 22
  40
  41struct msb {
  42        u8 fmt:4;
  43        u8 oc:4;
  44        u8 flags;
  45        u16:12;
  46        u16 bs:4;
  47        u32 blk_count;
  48        u64 data_addr;
  49        u64 scm_addr;
  50        u64:64;
  51} __packed;
  52
  53struct aidaw {
  54        u8 flags;
  55        u32 :24;
  56        u32 :32;
  57        u64 data_addr;
  58} __packed;
  59
  60#define MSB_OC_CLEAR    0
  61#define MSB_OC_READ     1
  62#define MSB_OC_WRITE    2
  63#define MSB_OC_RELEASE  3
  64
  65#define MSB_FLAG_BNM    0x80
  66#define MSB_FLAG_IDA    0x40
  67
  68#define MSB_BS_4K       0
  69#define MSB_BS_1M       1
  70
  71#define AOB_NR_MSB      124
  72
  73struct aob {
  74        struct arqb request;
  75        struct arsb response;
  76        struct msb msb[AOB_NR_MSB];
  77} __packed __aligned(PAGE_SIZE);
  78
  79struct aob_rq_header {
  80        struct scm_device *scmdev;
  81        char data[0];
  82};
  83
  84struct scm_device {
  85        u64 address;
  86        u64 size;
  87        unsigned int nr_max_block;
  88        struct device dev;
  89        struct {
  90                unsigned int persistence:4;
  91                unsigned int oper_state:4;
  92                unsigned int data_state:4;
  93                unsigned int rank:4;
  94                unsigned int release:1;
  95                unsigned int res_id:8;
  96        } __packed attrs;
  97};
  98
  99#define OP_STATE_GOOD           1
 100#define OP_STATE_TEMP_ERR       2
 101#define OP_STATE_PERM_ERR       3
 102
 103enum scm_event {SCM_CHANGE, SCM_AVAIL};
 104
 105struct scm_driver {
 106        struct device_driver drv;
 107        int (*probe) (struct scm_device *scmdev);
 108        int (*remove) (struct scm_device *scmdev);
 109        void (*notify) (struct scm_device *scmdev, enum scm_event event);
 110        void (*handler) (struct scm_device *scmdev, void *data,
 111                        blk_status_t error);
 112};
 113
 114int scm_driver_register(struct scm_driver *scmdrv);
 115void scm_driver_unregister(struct scm_driver *scmdrv);
 116
 117int eadm_start_aob(struct aob *aob);
 118void scm_irq_handler(struct aob *aob, blk_status_t error);
 119
 120#endif /* _ASM_S390_EADM_H */
 121
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