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