arch/s390/include/asm/eadm.h

   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/blkdev.h>
   8
   9 struct 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
  21 struct 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
  41 struct 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
  53 struct 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
  73 struct aob {
  74         struct arqb request;
  75         struct arsb response;
  76         struct msb msb[AOB_NR_MSB];
  77 } __packed __aligned(PAGE_SIZE);
  78
  79 struct aob_rq_header {
  80         struct scm_device *scmdev;
  81         char data[0];
  82 };
  83
  84 struct 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
 103 enum scm_event {SCM_CHANGE, SCM_AVAIL};
 104
 105 struct 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
 114 int scm_driver_register(struct scm_driver *scmdrv);
 115 void scm_driver_unregister(struct scm_driver *scmdrv);
 116
 117 int eadm_start_aob(struct aob *aob);
 118 void scm_irq_handler(struct aob *aob, blk_status_t error);
 119
 120 #endif /* _ASM_S390_EADM_H */