1 /* 2 * Copyright 2014 IBM Corp. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 */ 9 10 #ifndef _UAPI_MISC_CXL_H 11 #define _UAPI_MISC_CXL_H 12 13 #include <linux/types.h> 14 #include <linux/ioctl.h> 15 16 17 struct cxl_ioctl_start_work { 18 __u64 flags; 19 __u64 work_element_descriptor; 20 __u64 amr; 21 __s16 num_interrupts; 22 __s16 reserved1; 23 __s32 reserved2; 24 __u64 reserved3; 25 __u64 reserved4; 26 __u64 reserved5; 27 __u64 reserved6; 28 }; 29 30 #define CXL_START_WORK_AMR 0x0000000000000001ULL 31 #define CXL_START_WORK_NUM_IRQS 0x0000000000000002ULL 32 #define CXL_START_WORK_ALL (CXL_START_WORK_AMR |\ 33 CXL_START_WORK_NUM_IRQS) 34 35 36 /* Possible modes that an afu can be in */ 37 #define CXL_MODE_DEDICATED 0x1 38 #define CXL_MODE_DIRECTED 0x2 39 40 /* possible flags for the cxl_afu_id flags field */ 41 #define CXL_AFUID_FLAG_SLAVE 0x1 /* In directed-mode afu is in slave mode */ 42 43 struct cxl_afu_id { 44 __u64 flags; /* One of CXL_AFUID_FLAG_X */ 45 __u32 card_id; 46 __u32 afu_offset; 47 __u32 afu_mode; /* one of the CXL_MODE_X */ 48 __u32 reserved1; 49 __u64 reserved2; 50 __u64 reserved3; 51 __u64 reserved4; 52 __u64 reserved5; 53 __u64 reserved6; 54 }; 55 56 /* ioctl numbers */ 57 #define CXL_MAGIC 0xCA 58 #define CXL_IOCTL_START_WORK _IOW(CXL_MAGIC, 0x00, struct cxl_ioctl_start_work) 59 #define CXL_IOCTL_GET_PROCESS_ELEMENT _IOR(CXL_MAGIC, 0x01, __u32) 60 #define CXL_IOCTL_GET_AFU_ID _IOR(CXL_MAGIC, 0x02, struct cxl_afu_id) 61 62 #define CXL_READ_MIN_SIZE 0x1000 /* 4K */ 63 64 /* Events from read() */ 65 enum cxl_event_type { 66 CXL_EVENT_RESERVED = 0, 67 CXL_EVENT_AFU_INTERRUPT = 1, 68 CXL_EVENT_DATA_STORAGE = 2, 69 CXL_EVENT_AFU_ERROR = 3, 70 }; 71 72 struct cxl_event_header { 73 __u16 type; 74 __u16 size; 75 __u16 process_element; 76 __u16 reserved1; 77 }; 78 79 struct cxl_event_afu_interrupt { 80 __u16 flags; 81 __u16 irq; /* Raised AFU interrupt number */ 82 __u32 reserved1; 83 }; 84 85 struct cxl_event_data_storage { 86 __u16 flags; 87 __u16 reserved1; 88 __u32 reserved2; 89 __u64 addr; 90 __u64 dsisr; 91 __u64 reserved3; 92 }; 93 94 struct cxl_event_afu_error { 95 __u16 flags; 96 __u16 reserved1; 97 __u32 reserved2; 98 __u64 error; 99 }; 100 101 struct cxl_event { 102 struct cxl_event_header header; 103 union { 104 struct cxl_event_afu_interrupt irq; 105 struct cxl_event_data_storage fault; 106 struct cxl_event_afu_error afu_error; 107 }; 108 }; 109 110 #endif /* _UAPI_MISC_CXL_H */ 111