arch/s390/include/asm/eadm.h

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