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 17struct 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_ERR_FF 0x0000000000000004ULL 33#define CXL_START_WORK_ALL (CXL_START_WORK_AMR |\ 34 CXL_START_WORK_NUM_IRQS |\ 35 CXL_START_WORK_ERR_FF) 36 37 38/* Possible modes that an afu can be in */ 39#define CXL_MODE_DEDICATED 0x1 40#define CXL_MODE_DIRECTED 0x2 41 42/* possible flags for the cxl_afu_id flags field */ 43#define CXL_AFUID_FLAG_SLAVE 0x1 /* In directed-mode afu is in slave mode */ 44 45struct cxl_afu_id { 46 __u64 flags; /* One of CXL_AFUID_FLAG_X */ 47 __u32 card_id; 48 __u32 afu_offset; 49 __u32 afu_mode; /* one of the CXL_MODE_X */ 50 __u32 reserved1; 51 __u64 reserved2; 52 __u64 reserved3; 53 __u64 reserved4; 54 __u64 reserved5; 55 __u64 reserved6; 56}; 57 58/* ioctl numbers */ 59#define CXL_MAGIC 0xCA 60#define CXL_IOCTL_START_WORK _IOW(CXL_MAGIC, 0x00, struct cxl_ioctl_start_work) 61#define CXL_IOCTL_GET_PROCESS_ELEMENT _IOR(CXL_MAGIC, 0x01, __u32) 62#define CXL_IOCTL_GET_AFU_ID _IOR(CXL_MAGIC, 0x02, struct cxl_afu_id) 63 64#define CXL_READ_MIN_SIZE 0x1000 /* 4K */ 65 66/* Events from read() */ 67enum cxl_event_type { 68 CXL_EVENT_RESERVED = 0, 69 CXL_EVENT_AFU_INTERRUPT = 1, 70 CXL_EVENT_DATA_STORAGE = 2, 71 CXL_EVENT_AFU_ERROR = 3, 72}; 73 74struct cxl_event_header { 75 __u16 type; 76 __u16 size; 77 __u16 process_element; 78 __u16 reserved1; 79}; 80 81struct cxl_event_afu_interrupt { 82 __u16 flags; 83 __u16 irq; /* Raised AFU interrupt number */ 84 __u32 reserved1; 85}; 86 87struct cxl_event_data_storage { 88 __u16 flags; 89 __u16 reserved1; 90 __u32 reserved2; 91 __u64 addr; 92 __u64 dsisr; 93 __u64 reserved3; 94}; 95 96struct cxl_event_afu_error { 97 __u16 flags; 98 __u16 reserved1; 99 __u32 reserved2; 100 __u64 error; 101}; 102 103struct cxl_event { 104 struct cxl_event_header header; 105 union { 106 struct cxl_event_afu_interrupt irq; 107 struct cxl_event_data_storage fault; 108 struct cxl_event_afu_error afu_error; 109 }; 110}; 111 112#endif /* _UAPI_MISC_CXL_H */ 113