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 #include <asm/dma-types.h>
9
10 struct arqb {
11 u64 data;
12 u16 fmt:4;
13 u16:12;
14 u16 cmd_code;
15 u16:16;
16 u16 msb_count;
17 u32 reserved[12];
18 } __packed;
19
20 #define ARQB_CMD_MOVE 1
21
22 struct arsb {
23 u16 fmt:4;
24 u32:28;
25 u8 ef;
26 u8:8;
27 u8 ecbi;
28 u8:8;
29 u8 fvf;
30 u16:16;
31 u8 eqc;
32 u32:32;
33 u64 fail_msb;
34 u64 fail_aidaw;
35 u64 fail_ms;
36 u64 fail_scm;
37 u32 reserved[4];
38 } __packed;
39
40 #define EQC_WR_PROHIBIT 22
41
42 struct msb {
43 u8 fmt:4;
44 u8 oc:4;
45 u8 flags;
46 u16:12;
47 u16 bs:4;
48 u32 blk_count;
49 dma64_t data_addr;
50 u64 scm_addr;
51 u64:64;
52 } __packed;
53
54 struct aidaw {
55 u8 flags;
56 u32 :24;
57 u32 :32;
58 dma64_t data_addr;
59 } __packed;
60
61 #define MSB_OC_CLEAR 0
62 #define MSB_OC_READ 1
63 #define MSB_OC_WRITE 2
64 #define MSB_OC_RELEASE 3
65
66 #define MSB_FLAG_BNM 0x80
67 #define MSB_FLAG_IDA 0x40
68
69 #define MSB_BS_4K 0
70 #define MSB_BS_1M 1
71
72 #define AOB_NR_MSB 124
73
74 struct aob {
75 struct arqb request;
76 struct arsb response;
77 struct msb msb[AOB_NR_MSB];
78 } __packed __aligned(PAGE_SIZE);
79
80 struct aob_rq_header {
81 struct scm_device *scmdev;
82 char data[];
83 };
84
85 struct scm_device {
86 u64 address;
87 u64 size;
88 unsigned int nr_max_block;
89 struct device dev;
90 struct {
91 unsigned int persistence:4;
92 unsigned int oper_state:4;
93 unsigned int data_state:4;
94 unsigned int rank:4;
95 unsigned int release:1;
96 unsigned int res_id:8;
97 } __packed attrs;
98 };
99
100 #define OP_STATE_GOOD 1
101 #define OP_STATE_TEMP_ERR 2
102 #define OP_STATE_PERM_ERR 3
103
104 enum scm_event {SCM_CHANGE, SCM_AVAIL};
105
106 struct scm_driver {
107 struct device_driver drv;
108 int (*probe) (struct scm_device *scmdev);
109 void (*remove) (struct scm_device *scmdev);
110 void (*notify) (struct scm_device *scmdev, enum scm_event event);
111 void (*handler) (struct scm_device *scmdev, void *data,
112 blk_status_t error);
113 };
114
115 int scm_driver_register(struct scm_driver *scmdrv);
116 void scm_driver_unregister(struct scm_driver *scmdrv);
117
118 int eadm_start_aob(struct aob *aob);
119 void scm_irq_handler(struct aob *aob, blk_status_t error);
120
121 #endif /* _ASM_S390_EADM_H */
122
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