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
10struct 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
22struct 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
42struct 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
54struct 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
74struct aob {
75	struct arqb request;
76	struct arsb response;
77	struct msb msb[AOB_NR_MSB];
78} __packed __aligned(PAGE_SIZE);
79
80struct aob_rq_header {
81	struct scm_device *scmdev;
82	char data[];
83};
84
85struct 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
104enum scm_event {SCM_CHANGE, SCM_AVAIL};
105
106struct 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
115int scm_driver_register(struct scm_driver *scmdrv);
116void scm_driver_unregister(struct scm_driver *scmdrv);
117
118int eadm_start_aob(struct aob *aob);
119void scm_irq_handler(struct aob *aob, blk_status_t error);
120
121#endif /* _ASM_S390_EADM_H */
122