2 files changed, 90 insertions, 0 deletions

diff --git a/include/uapi/misc/Kbuild b/include/uapi/misc/Kbuild
new file mode 100644
index 000000000000..e96cae7d58c9
--- /dev/null
+++ b/include/uapi/misc/Kbuild
@@ -0,0 +1,2 @@
+# misc Header export list
+header-y += cxl.h
diff --git a/include/uapi/misc/cxl.h b/include/uapi/misc/cxl.h
new file mode 100644
index 000000000000..cd6d789b73ec
--- /dev/null
+++ b/include/uapi/misc/cxl.h
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2014 IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _UAPI_MISC_CXL_H
+#define _UAPI_MISC_CXL_H
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+
+
+struct cxl_ioctl_start_work {
+        __u64 flags;
+        __u64 work_element_descriptor;
+        __u64 amr;
+        __s16 num_interrupts;
+        __s16 reserved1;
+        __s32 reserved2;
+        __u64 reserved3;
+        __u64 reserved4;
+        __u64 reserved5;
+        __u64 reserved6;
+};
+
+#define CXL_START_WORK_AMR              0x0000000000000001ULL
+#define CXL_START_WORK_NUM_IRQS         0x0000000000000002ULL
+#define CXL_START_WORK_ALL              (CXL_START_WORK_AMR |\
+                                         CXL_START_WORK_NUM_IRQS)
+
+/* ioctl numbers */
+#define CXL_MAGIC 0xCA
+#define CXL_IOCTL_START_WORK            _IOW(CXL_MAGIC, 0x00, struct cxl_ioctl_start_work)
+#define CXL_IOCTL_GET_PROCESS_ELEMENT   _IOR(CXL_MAGIC, 0x01, __u32)
+
+#define CXL_READ_MIN_SIZE 0x1000 /* 4K */
+
+/* Events from read() */
+enum cxl_event_type {
+        CXL_EVENT_RESERVED      = 0,
+        CXL_EVENT_AFU_INTERRUPT = 1,
+        CXL_EVENT_DATA_STORAGE  = 2,
+        CXL_EVENT_AFU_ERROR     = 3,
+};
+
+struct cxl_event_header {
+        __u16 type;
+        __u16 size;
+        __u16 process_element;
+        __u16 reserved1;
+};
+
+struct cxl_event_afu_interrupt {
+        __u16 flags;
+        __u16 irq; /* Raised AFU interrupt number */
+        __u32 reserved1;
+};
+
+struct cxl_event_data_storage {
+        __u16 flags;
+        __u16 reserved1;
+        __u32 reserved2;
+        __u64 addr;
+        __u64 dsisr;
+        __u64 reserved3;
+};
+
+struct cxl_event_afu_error {
+        __u16 flags;
+        __u16 reserved1;
+        __u32 reserved2;
+        __u64 error;
+};
+
+struct cxl_event {
+        struct cxl_event_header header;
+        union {
+                struct cxl_event_afu_interrupt irq;
+                struct cxl_event_data_storage fault;
+                struct cxl_event_afu_error afu_error;
+        };
+};
+
+#endif /* _UAPI_MISC_CXL_H */