Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 156 insertions, 0 deletions

diff --git a/include/uapi/misc/cxl.h b/include/uapi/misc/cxl.h
new file mode 100644
index 000000000..56376d390
--- /dev/null
+++ b/include/uapi/misc/cxl.h
@@ -0,0 +1,156 @@
+/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
+/*
+ * 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;
+	__u16 tid;
+	__s32 reserved1;
+	__u64 reserved2;
+	__u64 reserved3;
+	__u64 reserved4;
+	__u64 reserved5;
+};
+
+#define CXL_START_WORK_AMR		0x0000000000000001ULL
+#define CXL_START_WORK_NUM_IRQS		0x0000000000000002ULL
+#define CXL_START_WORK_ERR_FF		0x0000000000000004ULL
+#define CXL_START_WORK_TID		0x0000000000000008ULL
+#define CXL_START_WORK_ALL		(CXL_START_WORK_AMR |\
+					 CXL_START_WORK_NUM_IRQS |\
+					 CXL_START_WORK_ERR_FF |\
+					 CXL_START_WORK_TID)
+
+
+/* Possible modes that an afu can be in */
+#define CXL_MODE_DEDICATED   0x1
+#define CXL_MODE_DIRECTED    0x2
+
+/* possible flags for the cxl_afu_id flags field */
+#define CXL_AFUID_FLAG_SLAVE    0x1  /* In directed-mode afu is in slave mode */
+
+struct cxl_afu_id {
+	__u64 flags;     /* One of CXL_AFUID_FLAG_X */
+	__u32 card_id;
+	__u32 afu_offset;
+	__u32 afu_mode;  /* one of the CXL_MODE_X */
+	__u32 reserved1;
+	__u64 reserved2;
+	__u64 reserved3;
+	__u64 reserved4;
+	__u64 reserved5;
+	__u64 reserved6;
+};
+
+/* base adapter image header is included in the image */
+#define CXL_AI_NEED_HEADER	0x0000000000000001ULL
+#define CXL_AI_ALL		CXL_AI_NEED_HEADER
+
+#define CXL_AI_HEADER_SIZE 128
+#define CXL_AI_BUFFER_SIZE 4096
+#define CXL_AI_MAX_ENTRIES 256
+#define CXL_AI_MAX_CHUNK_SIZE (CXL_AI_BUFFER_SIZE * CXL_AI_MAX_ENTRIES)
+
+struct cxl_adapter_image {
+	__u64 flags;
+	__u64 data;
+	__u64 len_data;
+	__u64 len_image;
+	__u64 reserved1;
+	__u64 reserved2;
+	__u64 reserved3;
+	__u64 reserved4;
+};
+
+/* ioctl numbers */
+#define CXL_MAGIC 0xCA
+/* AFU devices */
+#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_IOCTL_GET_AFU_ID            _IOR(CXL_MAGIC, 0x02, struct cxl_afu_id)
+/* adapter devices */
+#define CXL_IOCTL_DOWNLOAD_IMAGE        _IOW(CXL_MAGIC, 0x0A, struct cxl_adapter_image)
+#define CXL_IOCTL_VALIDATE_IMAGE        _IOW(CXL_MAGIC, 0x0B, struct cxl_adapter_image)
+
+#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,
+	CXL_EVENT_AFU_DRIVER    = 4,
+};
+
+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_afu_driver_reserved {
+	/*
+	 * Defines the buffer passed to the cxl driver by the AFU driver.
+	 *
+	 * This is not ABI since the event header.size passed to the user for
+	 * existing events is set in the read call to sizeof(cxl_event_header)
+	 * + sizeof(whatever event is being dispatched) and the user is already
+	 * required to use a 4K buffer on the read call.
+	 *
+	 * Of course the contents will be ABI, but that's up the AFU driver.
+	 */
+	__u32 data_size;
+	__u8 data[];
+};
+
+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;
+		struct cxl_event_afu_driver_reserved afu_driver_event;
+	};
+};
+
+#endif /* _UAPI_MISC_CXL_H */