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eadm.h
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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 struct msb {
38  u8 fmt:4;
39  u8 oc:4;
40  u8 flags;
41  u16:12;
42  u16 bs:4;
43  u32 blk_count;
44  u64 data_addr;
45  u64 scm_addr;
46  u64:64;
47 } __packed;
48 
49 struct aidaw {
50  u8 flags;
51  u32 :24;
52  u32 :32;
53  u64 data_addr;
54 } __packed;
55 
56 #define MSB_OC_CLEAR 0
57 #define MSB_OC_READ 1
58 #define MSB_OC_WRITE 2
59 #define MSB_OC_RELEASE 3
60 
61 #define MSB_FLAG_BNM 0x80
62 #define MSB_FLAG_IDA 0x40
63 
64 #define MSB_BS_4K 0
65 #define MSB_BS_1M 1
66 
67 #define AOB_NR_MSB 124
68 
69 struct aob {
70  struct arqb request;
71  struct arsb response;
72  struct msb msb[AOB_NR_MSB];
73 } __packed __aligned(PAGE_SIZE);
74 
75 struct aob_rq_header {
76  struct scm_device *scmdev;
77  char data[0];
78 };
79 
80 struct scm_device {
81  u64 address;
82  u64 size;
83  unsigned int nr_max_block;
84  struct device dev;
85  struct {
86  unsigned int persistence:4;
87  unsigned int oper_state:4;
88  unsigned int data_state:4;
89  unsigned int rank:4;
90  unsigned int release:1;
91  unsigned int res_id:8;
92  } __packed attrs;
93 };
94 
95 #define OP_STATE_GOOD 1
96 #define OP_STATE_TEMP_ERR 2
97 #define OP_STATE_PERM_ERR 3
98 
99 struct scm_driver {
100  struct device_driver drv;
101  int (*probe) (struct scm_device *scmdev);
102  int (*remove) (struct scm_device *scmdev);
103  void (*notify) (struct scm_device *scmdev);
104  void (*handler) (struct scm_device *scmdev, void *data, int error);
105 };
106 
107 int scm_driver_register(struct scm_driver *scmdrv);
108 void scm_driver_unregister(struct scm_driver *scmdrv);
109 
110 int scm_start_aob(struct aob *aob);
111 void scm_irq_handler(struct aob *aob, int error);
112 
113 struct eadm_ops {
114  int (*eadm_start) (struct aob *aob);
115  struct module *owner;
116 };
117 
118 int scm_get_ref(void);
119 void scm_put_ref(void);
120 
121 void register_eadm_ops(struct eadm_ops *ops);
122 void unregister_eadm_ops(struct eadm_ops *ops);
123 
124 #endif /* _ASM_S390_EADM_H */
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