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
  9struct 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
 21struct 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
 41struct 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
 53struct 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
 73struct aob {
 74	struct arqb request;
 75	struct arsb response;
 76	struct msb msb[AOB_NR_MSB];
 77} __packed __aligned(PAGE_SIZE);
 78
 79struct aob_rq_header {
 80	struct scm_device *scmdev;
 81	char data[];
 82};
 83
 84struct 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
103enum scm_event {SCM_CHANGE, SCM_AVAIL};
104
105struct 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
114int scm_driver_register(struct scm_driver *scmdrv);
115void scm_driver_unregister(struct scm_driver *scmdrv);
116
117int eadm_start_aob(struct aob *aob);
118void scm_irq_handler(struct aob *aob, blk_status_t error);
119
120#endif /* _ASM_S390_EADM_H */