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authorIan Munsie <imunsie@au1.ibm.com>2014-10-08 19:55:05 +1100
committerMichael Ellerman <mpe@ellerman.id.au>2014-10-08 20:16:19 +1100
commita9282d01cf357379ce29103cec5e7651a53c634d (patch)
treeefbc02a23f5dbc8453cdb4584c0ac2cef1316ba0 /include/uapi/misc
parent881632c905f29fd7173250fd1d5b3a9a769d02be (diff)
cxl: Add documentation for userspace APIs
This documentation gives an overview of the hardware architecture, userspace APIs via /dev/cxl/afuM.N and the syfs files. It also adds a MAINTAINERS file entry for cxl. Signed-off-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'include/uapi/misc')
-rw-r--r--include/uapi/misc/cxl.h7
1 files changed, 4 insertions, 3 deletions
diff --git a/include/uapi/misc/cxl.h b/include/uapi/misc/cxl.h
index c232be6ae21f..cd6d789b73ec 100644
--- a/include/uapi/misc/cxl.h
+++ b/include/uapi/misc/cxl.h
@@ -13,7 +13,7 @@
#include <linux/types.h>
#include <linux/ioctl.h>
-/* Structs for IOCTLS for userspace to talk to the kernel */
+
struct cxl_ioctl_start_work {
__u64 flags;
__u64 work_element_descriptor;
@@ -26,19 +26,20 @@ struct cxl_ioctl_start_work {
__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 */
+/* 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)
-/* Events from read() */
#define CXL_READ_MIN_SIZE 0x1000 /* 4K */
+/* Events from read() */
enum cxl_event_type {
CXL_EVENT_RESERVED = 0,
CXL_EVENT_AFU_INTERRUPT = 1,

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