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authorFrederic Barrat <fbarrat@linux.vnet.ibm.com>2018-01-23 12:31:41 +0100
committerMichael Ellerman <mpe@ellerman.id.au>2018-01-24 11:42:58 +1100
commit5ef3166e8a32d78dfa985a323aa45ed485ff663a (patch)
treee1321e75dc2f802294f94d71aff7509057d01077 /include/uapi/misc
parent2cb3d64b26984703a6bb80e66adcc3727ad37f9f (diff)
ocxl: Driver code for 'generic' opencapi devices
Add an ocxl driver to handle generic opencapi devices. Of course, it's not meant to be the only opencapi driver, any device is free to implement its own. But if a host application only needs basic services like attaching to an opencapi adapter, have translation faults handled or allocate AFU interrupts, it should suffice. The AFU config space must follow the opencapi specification and use the expected vendor/device ID to be seen by the generic driver. The driver exposes the device AFUs as a char device in /dev/ocxl/ Note that the driver currently doesn't handle memory attached to the opencapi device. Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com> Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Alastair D'Silva <alastair@d-silva.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'include/uapi/misc')
-rw-r--r--include/uapi/misc/ocxl.h40
1 files changed, 40 insertions, 0 deletions
diff --git a/include/uapi/misc/ocxl.h b/include/uapi/misc/ocxl.h
new file mode 100644
index 000000000000..a37e34edf52f
--- /dev/null
+++ b/include/uapi/misc/ocxl.h
@@ -0,0 +1,40 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/* Copyright 2017 IBM Corp. */
+#ifndef _UAPI_MISC_OCXL_H
+#define _UAPI_MISC_OCXL_H
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+
+enum ocxl_event_type {
+ OCXL_AFU_EVENT_XSL_FAULT_ERROR = 0,
+};
+
+#define OCXL_KERNEL_EVENT_FLAG_LAST 0x0001 /* This is the last event pending */
+
+struct ocxl_kernel_event_header {
+ __u16 type;
+ __u16 flags;
+ __u32 reserved;
+};
+
+struct ocxl_kernel_event_xsl_fault_error {
+ __u64 addr;
+ __u64 dsisr;
+ __u64 count;
+ __u64 reserved;
+};
+
+struct ocxl_ioctl_attach {
+ __u64 amr;
+ __u64 reserved1;
+ __u64 reserved2;
+ __u64 reserved3;
+};
+
+/* ioctl numbers */
+#define OCXL_MAGIC 0xCA
+/* AFU devices */
+#define OCXL_IOCTL_ATTACH _IOW(OCXL_MAGIC, 0x10, struct ocxl_ioctl_attach)
+
+#endif /* _UAPI_MISC_OCXL_H */

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