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 10 struct 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 22 struct 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 42 struct 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 54 struct 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 74 struct aob { 75 struct arqb request; 76 struct arsb response; 77 struct msb msb[AOB_NR_MSB]; 78 } __packed __aligned(PAGE_SIZE); 79 80 struct aob_rq_header { 81 struct scm_device *scmdev; 82 char data[]; 83 }; 84 85 struct 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 3 103 104 enum scm_event {SCM_CHANGE, SCM_AVAIL}; 105 106 struct 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 }; 114 115 int scm_driver_register(struct scm_driver *scmdrv); 116 void scm_driver_unregister(struct scm_driver *scmdrv); 117 118 int eadm_start_aob(struct aob *aob); 119 void scm_irq_handler(struct aob *aob, blk_status_t error); 120 121 #endif /* _ASM_S390_EADM_H */ 122