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