include/asm/eadm.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef _ASM_S390_EADM_H
0003 #define _ASM_S390_EADM_H
0004
0005 #include <linux/types.h>
0006 #include <linux/device.h>
0007 #include <linux/blk_types.h>
0008
0009 struct arqb {
0010     u64 data;
0011     u16 fmt:4;
0012     u16:12;
0013     u16 cmd_code;
0014     u16:16;
0015     u16 msb_count;
0016     u32 reserved[12];
0017 } __packed;
0018
0019 #define ARQB_CMD_MOVE   1
0020
0021 struct arsb {
0022     u16 fmt:4;
0023     u32:28;
0024     u8 ef;
0025     u8:8;
0026     u8 ecbi;
0027     u8:8;
0028     u8 fvf;
0029     u16:16;
0030     u8 eqc;
0031     u32:32;
0032     u64 fail_msb;
0033     u64 fail_aidaw;
0034     u64 fail_ms;
0035     u64 fail_scm;
0036     u32 reserved[4];
0037 } __packed;
0038
0039 #define EQC_WR_PROHIBIT 22
0040
0041 struct msb {
0042     u8 fmt:4;
0043     u8 oc:4;
0044     u8 flags;
0045     u16:12;
0046     u16 bs:4;
0047     u32 blk_count;
0048     u64 data_addr;
0049     u64 scm_addr;
0050     u64:64;
0051 } __packed;
0052
0053 struct aidaw {
0054     u8 flags;
0055     u32 :24;
0056     u32 :32;
0057     u64 data_addr;
0058 } __packed;
0059
0060 #define MSB_OC_CLEAR    0
0061 #define MSB_OC_READ 1
0062 #define MSB_OC_WRITE    2
0063 #define MSB_OC_RELEASE  3
0064
0065 #define MSB_FLAG_BNM    0x80
0066 #define MSB_FLAG_IDA    0x40
0067
0068 #define MSB_BS_4K   0
0069 #define MSB_BS_1M   1
0070
0071 #define AOB_NR_MSB  124
0072
0073 struct aob {
0074     struct arqb request;
0075     struct arsb response;
0076     struct msb msb[AOB_NR_MSB];
0077 } __packed __aligned(PAGE_SIZE);
0078
0079 struct aob_rq_header {
0080     struct scm_device *scmdev;
0081     char data[];
0082 };
0083
0084 struct scm_device {
0085     u64 address;
0086     u64 size;
0087     unsigned int nr_max_block;
0088     struct device dev;
0089     struct {
0090         unsigned int persistence:4;
0091         unsigned int oper_state:4;
0092         unsigned int data_state:4;
0093         unsigned int rank:4;
0094         unsigned int release:1;
0095         unsigned int res_id:8;
0096     } __packed attrs;
0097 };
0098
0099 #define OP_STATE_GOOD       1
0100 #define OP_STATE_TEMP_ERR   2
0101 #define OP_STATE_PERM_ERR   3
0102
0103 enum scm_event {SCM_CHANGE, SCM_AVAIL};
0104
0105 struct scm_driver {
0106     struct device_driver drv;
0107     int (*probe) (struct scm_device *scmdev);
0108     void (*remove) (struct scm_device *scmdev);
0109     void (*notify) (struct scm_device *scmdev, enum scm_event event);
0110     void (*handler) (struct scm_device *scmdev, void *data,
0111             blk_status_t error);
0112 };
0113
0114 int scm_driver_register(struct scm_driver *scmdrv);
0115 void scm_driver_unregister(struct scm_driver *scmdrv);
0116
0117 int eadm_start_aob(struct aob *aob);
0118 void scm_irq_handler(struct aob *aob, blk_status_t error);
0119
0120 #endif /* _ASM_S390_EADM_H */