rapidio/mport_cdev: fix uapi type definitions

Fix problems in uapi definitions reported by Gabriel Laskar: (see
https://lkml.org/lkml/2016/4/5/205 for details)

 - move public header file rio_mport_cdev.h to include/uapi/linux directory
 - change types in data structures passed as IOCTL parameters
 - improve parameter checking in some IOCTL service routines

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Reported-by: Gabriel Laskar <gabriel@lse.epita.fr>
Tested-by: Barry Wood <barry.wood@idt.com>
Cc: Gabriel Laskar <gabriel@lse.epita.fr>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Cc: Barry Wood <barry.wood@idt.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 277 insertions, 0 deletions

diff --git a/include/uapi/linux/rio_mport_cdev.h b/include/uapi/linux/rio_mport_cdev.h
new file mode 100644
index 000000000000..5796bf1d06ad
--- /dev/null
+++ b/include/uapi/linux/rio_mport_cdev.h
@@ -0,0 +1,277 @@
+/*
+ * Copyright (c) 2015-2016, Integrated Device Technology Inc.
+ * Copyright (c) 2015, Prodrive Technologies
+ * Copyright (c) 2015, Texas Instruments Incorporated
+ * Copyright (c) 2015, RapidIO Trade Association
+ * All rights reserved.
+ *
+ * This software is available to you under a choice of one of two licenses.
+ * You may choose to be licensed under the terms of the GNU General Public
+ * License(GPL) Version 2, or the BSD-3 Clause license below:
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its contributors
+ * may be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _RIO_MPORT_CDEV_H_
+#define _RIO_MPORT_CDEV_H_
+
+#include <linux/ioctl.h>
+#include <linux/types.h>
+
+struct rio_mport_maint_io {
+	__u16 rioid;		/* destID of remote device */
+	__u8  hopcount;		/* hopcount to remote device */
+	__u8  pad0[5];
+	__u32 offset;		/* offset in register space */
+	__u32 length;		/* length in bytes */
+	__u64 buffer;		/* pointer to data buffer */
+};
+
+/*
+ * Definitions for RapidIO data transfers:
+ * - memory mapped (MAPPED)
+ * - packet generation from memory (TRANSFER)
+ */
+#define RIO_TRANSFER_MODE_MAPPED	(1 << 0)
+#define RIO_TRANSFER_MODE_TRANSFER	(1 << 1)
+#define RIO_CAP_DBL_SEND		(1 << 2)
+#define RIO_CAP_DBL_RECV		(1 << 3)
+#define RIO_CAP_PW_SEND			(1 << 4)
+#define RIO_CAP_PW_RECV			(1 << 5)
+#define RIO_CAP_MAP_OUTB		(1 << 6)
+#define RIO_CAP_MAP_INB			(1 << 7)
+
+struct rio_mport_properties {
+	__u16 hdid;
+	__u8  id;			/* Physical port ID */
+	__u8  index;
+	__u32 flags;
+	__u32 sys_size;		/* Default addressing size */
+	__u8  port_ok;
+	__u8  link_speed;
+	__u8  link_width;
+	__u8  pad0;
+	__u32 dma_max_sge;
+	__u32 dma_max_size;
+	__u32 dma_align;
+	__u32 transfer_mode;		/* Default transfer mode */
+	__u32 cap_sys_size;		/* Capable system sizes */
+	__u32 cap_addr_size;		/* Capable addressing sizes */
+	__u32 cap_transfer_mode;	/* Capable transfer modes */
+	__u32 cap_mport;		/* Mport capabilities */
+};
+
+/*
+ * Definitions for RapidIO events;
+ * - incoming port-writes
+ * - incoming doorbells
+ */
+#define RIO_DOORBELL	(1 << 0)
+#define RIO_PORTWRITE	(1 << 1)
+
+struct rio_doorbell {
+	__u16 rioid;
+	__u16 payload;
+};
+
+struct rio_doorbell_filter {
+	__u16 rioid;	/* Use RIO_INVALID_DESTID to match all ids */
+	__u16 low;
+	__u16 high;
+	__u16 pad0;
+};
+
+
+struct rio_portwrite {
+	__u32 payload[16];
+};
+
+struct rio_pw_filter {
+	__u32 mask;
+	__u32 low;
+	__u32 high;
+	__u32 pad0;
+};
+
+/* RapidIO base address for inbound requests set to value defined below
+ * indicates that no specific RIO-to-local address translation is requested
+ * and driver should use direct (one-to-one) address mapping.
+*/
+#define RIO_MAP_ANY_ADDR	(__u64)(~((__u64) 0))
+
+struct rio_mmap {
+	__u16 rioid;
+	__u16 pad0[3];
+	__u64 rio_addr;
+	__u64 length;
+	__u64 handle;
+	__u64 address;
+};
+
+struct rio_dma_mem {
+	__u64 length;		/* length of DMA memory */
+	__u64 dma_handle;	/* handle associated with this memory */
+	__u64 address;
+};
+
+struct rio_event {
+	__u32 header;	/* event type RIO_DOORBELL or RIO_PORTWRITE */
+	union {
+		struct rio_doorbell doorbell;	/* header for RIO_DOORBELL */
+		struct rio_portwrite portwrite; /* header for RIO_PORTWRITE */
+	} u;
+	__u32 pad0;
+};
+
+enum rio_transfer_sync {
+	RIO_TRANSFER_SYNC,	/* synchronous transfer */
+	RIO_TRANSFER_ASYNC,	/* asynchronous transfer */
+	RIO_TRANSFER_FAF,	/* fire-and-forget transfer */
+};
+
+enum rio_transfer_dir {
+	RIO_TRANSFER_DIR_READ,	/* Read operation */
+	RIO_TRANSFER_DIR_WRITE,	/* Write operation */
+};
+
+/*
+ * RapidIO data exchange transactions are lists of individual transfers. Each
+ * transfer exchanges data between two RapidIO devices by remote direct memory
+ * access and has its own completion code.
+ *
+ * The RapidIO specification defines four types of data exchange requests:
+ * NREAD, NWRITE, SWRITE and NWRITE_R. The RapidIO DMA channel interface allows
+ * to specify the required type of write operation or combination of them when
+ * only the last data packet requires response.
+ *
+ * NREAD:    read up to 256 bytes from remote device memory into local memory
+ * NWRITE:   write up to 256 bytes from local memory to remote device memory
+ *           without confirmation
+ * SWRITE:   as NWRITE, but all addresses and payloads must be 64-bit aligned
+ * NWRITE_R: as NWRITE, but expect acknowledgment from remote device.
+ *
+ * The default exchange is chosen from NREAD and any of the WRITE modes as the
+ * driver sees fit. For write requests the user can explicitly choose between
+ * any of the write modes for each transaction.
+ */
+enum rio_exchange {
+	RIO_EXCHANGE_DEFAULT,	/* Default method */
+	RIO_EXCHANGE_NWRITE,	/* All packets using NWRITE */
+	RIO_EXCHANGE_SWRITE,	/* All packets using SWRITE */
+	RIO_EXCHANGE_NWRITE_R,	/* Last packet NWRITE_R, others NWRITE */
+	RIO_EXCHANGE_SWRITE_R,	/* Last packet NWRITE_R, others SWRITE */
+	RIO_EXCHANGE_NWRITE_R_ALL, /* All packets using NWRITE_R */
+};
+
+struct rio_transfer_io {
+	__u64 rio_addr;	/* Address in target's RIO mem space */
+	__u64 loc_addr;
+	__u64 handle;
+	__u64 offset;	/* Offset in buffer */
+	__u64 length;	/* Length in bytes */
+	__u16 rioid;	/* Target destID */
+	__u16 method;	/* Data exchange method, one of rio_exchange enum */
+	__u32 completion_code;	/* Completion code for this transfer */
+};
+
+struct rio_transaction {
+	__u64 block;	/* Pointer to array of <count> transfers */
+	__u32 count;	/* Number of transfers */
+	__u32 transfer_mode;	/* Data transfer mode */
+	__u16 sync;	/* Synch method, one of rio_transfer_sync enum */
+	__u16 dir;	/* Transfer direction, one of rio_transfer_dir enum */
+	__u32 pad0;
+};
+
+struct rio_async_tx_wait {
+	__u32 token;	/* DMA transaction ID token */
+	__u32 timeout;	/* Wait timeout in msec, if 0 use default TO */
+};
+
+#define RIO_MAX_DEVNAME_SZ	20
+
+struct rio_rdev_info {
+	__u16 destid;
+	__u8 hopcount;
+	__u8 pad0;
+	__u32 comptag;
+	char name[RIO_MAX_DEVNAME_SZ + 1];
+};
+
+/* Driver IOCTL codes */
+#define RIO_MPORT_DRV_MAGIC           'm'
+
+#define RIO_MPORT_MAINT_HDID_SET	\
+	_IOW(RIO_MPORT_DRV_MAGIC, 1, __u16)
+#define RIO_MPORT_MAINT_COMPTAG_SET	\
+	_IOW(RIO_MPORT_DRV_MAGIC, 2, __u32)
+#define RIO_MPORT_MAINT_PORT_IDX_GET	\
+	_IOR(RIO_MPORT_DRV_MAGIC, 3, __u32)
+#define RIO_MPORT_GET_PROPERTIES \
+	_IOR(RIO_MPORT_DRV_MAGIC, 4, struct rio_mport_properties)
+#define RIO_MPORT_MAINT_READ_LOCAL \
+	_IOR(RIO_MPORT_DRV_MAGIC, 5, struct rio_mport_maint_io)
+#define RIO_MPORT_MAINT_WRITE_LOCAL \
+	_IOW(RIO_MPORT_DRV_MAGIC, 6, struct rio_mport_maint_io)
+#define RIO_MPORT_MAINT_READ_REMOTE \
+	_IOR(RIO_MPORT_DRV_MAGIC, 7, struct rio_mport_maint_io)
+#define RIO_MPORT_MAINT_WRITE_REMOTE \
+	_IOW(RIO_MPORT_DRV_MAGIC, 8, struct rio_mport_maint_io)
+#define RIO_ENABLE_DOORBELL_RANGE	\
+	_IOW(RIO_MPORT_DRV_MAGIC, 9, struct rio_doorbell_filter)
+#define RIO_DISABLE_DOORBELL_RANGE	\
+	_IOW(RIO_MPORT_DRV_MAGIC, 10, struct rio_doorbell_filter)
+#define RIO_ENABLE_PORTWRITE_RANGE	\
+	_IOW(RIO_MPORT_DRV_MAGIC, 11, struct rio_pw_filter)
+#define RIO_DISABLE_PORTWRITE_RANGE	\
+	_IOW(RIO_MPORT_DRV_MAGIC, 12, struct rio_pw_filter)
+#define RIO_SET_EVENT_MASK		\
+	_IOW(RIO_MPORT_DRV_MAGIC, 13, __u32)
+#define RIO_GET_EVENT_MASK		\
+	_IOR(RIO_MPORT_DRV_MAGIC, 14, __u32)
+#define RIO_MAP_OUTBOUND \
+	_IOWR(RIO_MPORT_DRV_MAGIC, 15, struct rio_mmap)
+#define RIO_UNMAP_OUTBOUND \
+	_IOW(RIO_MPORT_DRV_MAGIC, 16, struct rio_mmap)
+#define RIO_MAP_INBOUND \
+	_IOWR(RIO_MPORT_DRV_MAGIC, 17, struct rio_mmap)
+#define RIO_UNMAP_INBOUND \
+	_IOW(RIO_MPORT_DRV_MAGIC, 18, __u64)
+#define RIO_ALLOC_DMA \
+	_IOWR(RIO_MPORT_DRV_MAGIC, 19, struct rio_dma_mem)
+#define RIO_FREE_DMA \
+	_IOW(RIO_MPORT_DRV_MAGIC, 20, __u64)
+#define RIO_TRANSFER \
+	_IOWR(RIO_MPORT_DRV_MAGIC, 21, struct rio_transaction)
+#define RIO_WAIT_FOR_ASYNC \
+	_IOW(RIO_MPORT_DRV_MAGIC, 22, struct rio_async_tx_wait)
+#define RIO_DEV_ADD \
+	_IOW(RIO_MPORT_DRV_MAGIC, 23, struct rio_rdev_info)
+#define RIO_DEV_DEL \
+	_IOW(RIO_MPORT_DRV_MAGIC, 24, struct rio_rdev_info)
+
+#endif /* _RIO_MPORT_CDEV_H_ */