eadm.h

  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 */