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 
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 	void (*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 */
121