drivers/staging/fsl-mc/include/dpaa2-fd.h - arm/linux - Git at Google

 /*
  * Copyright 2014-2016 Freescale Semiconductor Inc.
  * Copyright 2016 NXP
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *     * Redistributions of source code must retain the above copyright
  *       notice, this list of conditions and the following disclaimer.
  *     * 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.
  *     * Neither the name of Freescale Semiconductor nor the
  *       names of its contributors may be used to endorse or promote products
  *       derived from this software without specific prior written permission.
  *
  * ALTERNATIVELY, this software may be distributed under the terms of the
  * GNU General Public License ("GPL") as published by the Free Software
  * Foundation, either version 2 of that License or (at your option) any
  * later version.
  *
  * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``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 Freescale Semiconductor 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 __FSL_DPAA2_FD_H
 #define __FSL_DPAA2_FD_H

 #include <linux/kernel.h>

 /**
  * DOC: DPAA2 FD - Frame Descriptor APIs for DPAA2
  *
  * Frame Descriptors (FDs) are used to describe frame data in the DPAA2.
  * Frames can be enqueued and dequeued to Frame Queues (FQs) which are consumed
  * by the various DPAA accelerators (WRIOP, SEC, PME, DCE)
  *
  * There are three types of frames: single, scatter gather, and frame lists.
  *
  * The set of APIs in this file must be used to create, manipulate and
  * query Frame Descriptors.
  */

 /**
  * struct dpaa2_fd - Struct describing FDs
  * @words:         for easier/faster copying the whole FD structure
  * @addr:          address in the FD
  * @len:           length in the FD
  * @bpid:          buffer pool ID
  * @format_offset: format, offset, and short-length fields
  * @frc:           frame context
  * @ctrl:          control bits...including dd, sc, va, err, etc
  * @flc:           flow context address
  *
  * This structure represents the basic Frame Descriptor used in the system.
  */
 struct dpaa2_fd {
 	union {
 		u32 words[8];
 		struct dpaa2_fd_simple {
 			__le64 addr;
 			__le32 len;
 			__le16 bpid;
 			__le16 format_offset;
 			__le32 frc;
 			__le32 ctrl;
 			__le64 flc;
 		} simple;
 	};
 };

 #define FD_SHORT_LEN_FLAG_MASK	0x1
 #define FD_SHORT_LEN_FLAG_SHIFT	14
 #define FD_SHORT_LEN_MASK	0x3FFFF
 #define FD_OFFSET_MASK		0x0FFF
 #define FD_FORMAT_MASK		0x3
 #define FD_FORMAT_SHIFT		12
 #define FD_BPID_MASK		0x3FFF
 #define SG_SHORT_LEN_FLAG_MASK	0x1
 #define SG_SHORT_LEN_FLAG_SHIFT	14
 #define SG_SHORT_LEN_MASK	0x1FFFF
 #define SG_OFFSET_MASK		0x0FFF
 #define SG_FORMAT_MASK		0x3
 #define SG_FORMAT_SHIFT		12
 #define SG_BPID_MASK		0x3FFF
 #define SG_FINAL_FLAG_MASK	0x1
 #define SG_FINAL_FLAG_SHIFT	15

 enum dpaa2_fd_format {
 	dpaa2_fd_single = 0,
 	dpaa2_fd_list,
 	dpaa2_fd_sg
 };

 /**
  * dpaa2_fd_get_addr() - get the addr field of frame descriptor
  * @fd: the given frame descriptor
  *
  * Return the address in the frame descriptor.
  */
 static inline dma_addr_t dpaa2_fd_get_addr(const struct dpaa2_fd *fd)
 {
 	return (dma_addr_t)le64_to_cpu(fd->simple.addr);
 }

 /**
  * dpaa2_fd_set_addr() - Set the addr field of frame descriptor
  * @fd: the given frame descriptor
  * @addr: the address needs to be set in frame descriptor
  */
 static inline void dpaa2_fd_set_addr(struct dpaa2_fd *fd, dma_addr_t addr)
 {
 	fd->simple.addr = cpu_to_le64(addr);
 }

 /**
  * dpaa2_fd_get_frc() - Get the frame context in the frame descriptor
  * @fd: the given frame descriptor
  *
  * Return the frame context field in the frame descriptor.
  */
 static inline u32 dpaa2_fd_get_frc(const struct dpaa2_fd *fd)
 {
 	return le32_to_cpu(fd->simple.frc);
 }

 /**
  * dpaa2_fd_set_frc() - Set the frame context in the frame descriptor
  * @fd: the given frame descriptor
  * @frc: the frame context needs to be set in frame descriptor
  */
 static inline void dpaa2_fd_set_frc(struct dpaa2_fd *fd, u32 frc)
 {
 	fd->simple.frc = cpu_to_le32(frc);
 }

 /**
  * dpaa2_fd_get_ctrl() - Get the control bits in the frame descriptor
  * @fd: the given frame descriptor
  *
  * Return the control bits field in the frame descriptor.
  */
 static inline u32 dpaa2_fd_get_ctrl(const struct dpaa2_fd *fd)
 {
 	return le32_to_cpu(fd->simple.ctrl);
 }

 /**
  * dpaa2_fd_set_ctrl() - Set the control bits in the frame descriptor
  * @fd: the given frame descriptor
  * @ctrl: the control bits to be set in the frame descriptor
  */
 static inline void dpaa2_fd_set_ctrl(struct dpaa2_fd *fd, u32 ctrl)
 {
 	fd->simple.ctrl = cpu_to_le32(ctrl);
 }

 /**
  * dpaa2_fd_get_flc() - Get the flow context in the frame descriptor
  * @fd: the given frame descriptor
  *
  * Return the flow context in the frame descriptor.
  */
 static inline dma_addr_t dpaa2_fd_get_flc(const struct dpaa2_fd *fd)
 {
 	return (dma_addr_t)le64_to_cpu(fd->simple.flc);
 }

 /**
  * dpaa2_fd_set_flc() - Set the flow context field of frame descriptor
  * @fd: the given frame descriptor
  * @flc_addr: the flow context needs to be set in frame descriptor
  */
 static inline void dpaa2_fd_set_flc(struct dpaa2_fd *fd,  dma_addr_t flc_addr)
 {
 	fd->simple.flc = cpu_to_le64(flc_addr);
 }

 static inline bool dpaa2_fd_short_len(const struct dpaa2_fd *fd)
 {
 	return !!((le16_to_cpu(fd->simple.format_offset) >>
 		  FD_SHORT_LEN_FLAG_SHIFT) & FD_SHORT_LEN_FLAG_MASK);
 }

 /**
  * dpaa2_fd_get_len() - Get the length in the frame descriptor
  * @fd: the given frame descriptor
  *
  * Return the length field in the frame descriptor.
  */
 static inline u32 dpaa2_fd_get_len(const struct dpaa2_fd *fd)
 {
 	if (dpaa2_fd_short_len(fd))
 		return le32_to_cpu(fd->simple.len) & FD_SHORT_LEN_MASK;

 	return le32_to_cpu(fd->simple.len);
 }

 /**
  * dpaa2_fd_set_len() - Set the length field of frame descriptor
  * @fd: the given frame descriptor
  * @len: the length needs to be set in frame descriptor
  */
 static inline void dpaa2_fd_set_len(struct dpaa2_fd *fd, u32 len)
 {
 	fd->simple.len = cpu_to_le32(len);
 }

 /**
  * dpaa2_fd_get_offset() - Get the offset field in the frame descriptor
  * @fd: the given frame descriptor
  *
  * Return the offset.
  */
 static inline uint16_t dpaa2_fd_get_offset(const struct dpaa2_fd *fd)
 {
 	return le16_to_cpu(fd->simple.format_offset) & FD_OFFSET_MASK;
 }

 /**
  * dpaa2_fd_set_offset() - Set the offset field of frame descriptor
  * @fd: the given frame descriptor
  * @offset: the offset needs to be set in frame descriptor
  */
 static inline void dpaa2_fd_set_offset(struct dpaa2_fd *fd, uint16_t offset)
 {
 	fd->simple.format_offset &= cpu_to_le16(~FD_OFFSET_MASK);
 	fd->simple.format_offset |= cpu_to_le16(offset);
 }

 /**
  * dpaa2_fd_get_format() - Get the format field in the frame descriptor
  * @fd: the given frame descriptor
  *
  * Return the format.
  */
 static inline enum dpaa2_fd_format dpaa2_fd_get_format(
 						const struct dpaa2_fd *fd)
 {
 	return (enum dpaa2_fd_format)((le16_to_cpu(fd->simple.format_offset)
 				      >> FD_FORMAT_SHIFT) & FD_FORMAT_MASK);
 }

 /**
  * dpaa2_fd_set_format() - Set the format field of frame descriptor
  * @fd: the given frame descriptor
  * @format: the format needs to be set in frame descriptor
  */
 static inline void dpaa2_fd_set_format(struct dpaa2_fd *fd,
 				       enum dpaa2_fd_format format)
 {
 	fd->simple.format_offset &=
 		cpu_to_le16(~(FD_FORMAT_MASK << FD_FORMAT_SHIFT));
 	fd->simple.format_offset |= cpu_to_le16(format << FD_FORMAT_SHIFT);
 }

 /**
  * dpaa2_fd_get_bpid() - Get the bpid field in the frame descriptor
  * @fd: the given frame descriptor
  *
  * Return the buffer pool id.
  */
 static inline uint16_t dpaa2_fd_get_bpid(const struct dpaa2_fd *fd)
 {
 	return le16_to_cpu(fd->simple.bpid) & FD_BPID_MASK;
 }

 /**
  * dpaa2_fd_set_bpid() - Set the bpid field of frame descriptor
  * @fd: the given frame descriptor
  * @bpid: buffer pool id to be set
  */
 static inline void dpaa2_fd_set_bpid(struct dpaa2_fd *fd, uint16_t bpid)
 {
 	fd->simple.bpid &= cpu_to_le16(~(FD_BPID_MASK));
 	fd->simple.bpid |= cpu_to_le16(bpid);
 }

 /**
  * struct dpaa2_sg_entry - the scatter-gathering structure
  * @addr: address of the sg entry
  * @len: length in this sg entry
  * @bpid: buffer pool id
  * @format_offset: format and offset fields
  */
 struct dpaa2_sg_entry {
 	__le64 addr;
 	__le32 len;
 	__le16 bpid;
 	__le16 format_offset;
 };

 enum dpaa2_sg_format {
 	dpaa2_sg_single = 0,
 	dpaa2_sg_frame_data,
 	dpaa2_sg_sgt_ext
 };

 /* Accessors for SG entry fields */

 /**
  * dpaa2_sg_get_addr() - Get the address from SG entry
  * @sg: the given scatter-gathering object
  *
  * Return the address.
  */
 static inline dma_addr_t dpaa2_sg_get_addr(const struct dpaa2_sg_entry *sg)
 {
 	return le64_to_cpu((dma_addr_t)sg->addr);
 }

 /**
  * dpaa2_sg_set_addr() - Set the address in SG entry
  * @sg: the given scatter-gathering object
  * @addr: the address to be set
  */
 static inline void dpaa2_sg_set_addr(struct dpaa2_sg_entry *sg, dma_addr_t addr)
 {
 	sg->addr = cpu_to_le64(addr);
 }

 static inline bool dpaa2_sg_short_len(const struct dpaa2_sg_entry *sg)
 {
 	return !!((le16_to_cpu(sg->format_offset) >> SG_SHORT_LEN_FLAG_SHIFT)
 		& SG_SHORT_LEN_FLAG_MASK);
 }

 /**
  * dpaa2_sg_get_len() - Get the length in SG entry
  * @sg: the given scatter-gathering object
  *
  * Return the length.
  */
 static inline u32 dpaa2_sg_get_len(const struct dpaa2_sg_entry *sg)
 {
 	if (dpaa2_sg_short_len(sg))
 		return le32_to_cpu(sg->len) & SG_SHORT_LEN_MASK;

 	return le32_to_cpu(sg->len);
 }

 /**
  * dpaa2_sg_set_len() - Set the length in SG entry
  * @sg: the given scatter-gathering object
  * @len: the length to be set
  */
 static inline void dpaa2_sg_set_len(struct dpaa2_sg_entry *sg, u32 len)
 {
 	sg->len = cpu_to_le32(len);
 }

 /**
  * dpaa2_sg_get_offset() - Get the offset in SG entry
  * @sg: the given scatter-gathering object
  *
  * Return the offset.
  */
 static inline u16 dpaa2_sg_get_offset(const struct dpaa2_sg_entry *sg)
 {
 	return le16_to_cpu(sg->format_offset) & SG_OFFSET_MASK;
 }

 /**
  * dpaa2_sg_set_offset() - Set the offset in SG entry
  * @sg: the given scatter-gathering object
  * @offset: the offset to be set
  */
 static inline void dpaa2_sg_set_offset(struct dpaa2_sg_entry *sg,
 				       u16 offset)
 {
 	sg->format_offset &= cpu_to_le16(~SG_OFFSET_MASK);
 	sg->format_offset |= cpu_to_le16(offset);
 }

 /**
  * dpaa2_sg_get_format() - Get the SG format in SG entry
  * @sg: the given scatter-gathering object
  *
  * Return the format.
  */
 static inline enum dpaa2_sg_format
 	dpaa2_sg_get_format(const struct dpaa2_sg_entry *sg)
 {
 	return (enum dpaa2_sg_format)((le16_to_cpu(sg->format_offset)
 				       >> SG_FORMAT_SHIFT) & SG_FORMAT_MASK);
 }

 /**
  * dpaa2_sg_set_format() - Set the SG format in SG entry
  * @sg: the given scatter-gathering object
  * @format: the format to be set
  */
 static inline void dpaa2_sg_set_format(struct dpaa2_sg_entry *sg,
 				       enum dpaa2_sg_format format)
 {
 	sg->format_offset &= cpu_to_le16(~(SG_FORMAT_MASK << SG_FORMAT_SHIFT));
 	sg->format_offset |= cpu_to_le16(format << SG_FORMAT_SHIFT);
 }

 /**
  * dpaa2_sg_get_bpid() - Get the buffer pool id in SG entry
  * @sg: the given scatter-gathering object
  *
  * Return the bpid.
  */
 static inline u16 dpaa2_sg_get_bpid(const struct dpaa2_sg_entry *sg)
 {
 	return le16_to_cpu(sg->bpid) & SG_BPID_MASK;
 }

 /**
  * dpaa2_sg_set_bpid() - Set the buffer pool id in SG entry
  * @sg: the given scatter-gathering object
  * @bpid: the bpid to be set
  */
 static inline void dpaa2_sg_set_bpid(struct dpaa2_sg_entry *sg, u16 bpid)
 {
 	sg->bpid &= cpu_to_le16(~(SG_BPID_MASK));
 	sg->bpid |= cpu_to_le16(bpid);
 }

 /**
  * dpaa2_sg_is_final() - Check final bit in SG entry
  * @sg: the given scatter-gathering object
  *
  * Return bool.
  */
 static inline bool dpaa2_sg_is_final(const struct dpaa2_sg_entry *sg)
 {
 	return !!(le16_to_cpu(sg->format_offset) >> SG_FINAL_FLAG_SHIFT);
 }

 /**
  * dpaa2_sg_set_final() - Set the final bit in SG entry
  * @sg: the given scatter-gathering object
  * @final: the final boolean to be set
  */
 static inline void dpaa2_sg_set_final(struct dpaa2_sg_entry *sg, bool final)
 {
 	sg->format_offset &= cpu_to_le16(~(SG_FINAL_FLAG_MASK
 					 << SG_FINAL_FLAG_SHIFT));
 	sg->format_offset |= cpu_to_le16(final << SG_FINAL_FLAG_SHIFT);
 }

 #endif /* __FSL_DPAA2_FD_H */
	/*
	* Copyright 2014-2016 Freescale Semiconductor Inc.
	* Copyright 2016 NXP
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions are met:
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * 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.
	* * Neither the name of Freescale Semiconductor nor the
	* names of its contributors may be used to endorse or promote products
	* derived from this software without specific prior written permission.
	*
	* ALTERNATIVELY, this software may be distributed under the terms of the
	* GNU General Public License ("GPL") as published by the Free Software
	* Foundation, either version 2 of that License or (at your option) any
	* later version.
	*
	* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``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 Freescale Semiconductor 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 __FSL_DPAA2_FD_H
	#define __FSL_DPAA2_FD_H

	#include <linux/kernel.h>

	/**
	* DOC: DPAA2 FD - Frame Descriptor APIs for DPAA2
	*
	* Frame Descriptors (FDs) are used to describe frame data in the DPAA2.
	* Frames can be enqueued and dequeued to Frame Queues (FQs) which are consumed
	* by the various DPAA accelerators (WRIOP, SEC, PME, DCE)
	*
	* There are three types of frames: single, scatter gather, and frame lists.
	*
	* The set of APIs in this file must be used to create, manipulate and
	* query Frame Descriptors.
	*/

	/**
	* struct dpaa2_fd - Struct describing FDs
	* @words: for easier/faster copying the whole FD structure
	* @addr: address in the FD
	* @len: length in the FD
	* @bpid: buffer pool ID
	* @format_offset: format, offset, and short-length fields
	* @frc: frame context
	* @ctrl: control bits...including dd, sc, va, err, etc
	* @flc: flow context address
	*
	* This structure represents the basic Frame Descriptor used in the system.
	*/
	struct dpaa2_fd {
	union {
	u32 words[8];
	struct dpaa2_fd_simple {
	__le64 addr;
	__le32 len;
	__le16 bpid;
	__le16 format_offset;
	__le32 frc;
	__le32 ctrl;
	__le64 flc;
	} simple;
	};
	};

	#define FD_SHORT_LEN_FLAG_MASK 0x1
	#define FD_SHORT_LEN_FLAG_SHIFT 14
	#define FD_SHORT_LEN_MASK 0x3FFFF
	#define FD_OFFSET_MASK 0x0FFF
	#define FD_FORMAT_MASK 0x3
	#define FD_FORMAT_SHIFT 12
	#define FD_BPID_MASK 0x3FFF
	#define SG_SHORT_LEN_FLAG_MASK 0x1
	#define SG_SHORT_LEN_FLAG_SHIFT 14
	#define SG_SHORT_LEN_MASK 0x1FFFF
	#define SG_OFFSET_MASK 0x0FFF
	#define SG_FORMAT_MASK 0x3
	#define SG_FORMAT_SHIFT 12
	#define SG_BPID_MASK 0x3FFF
	#define SG_FINAL_FLAG_MASK 0x1
	#define SG_FINAL_FLAG_SHIFT 15

	enum dpaa2_fd_format {
	dpaa2_fd_single = 0,
	dpaa2_fd_list,
	dpaa2_fd_sg
	};

	/**
	* dpaa2_fd_get_addr() - get the addr field of frame descriptor
	* @fd: the given frame descriptor
	*
	* Return the address in the frame descriptor.
	*/
	static inline dma_addr_t dpaa2_fd_get_addr(const struct dpaa2_fd *fd)
	{
	return (dma_addr_t)le64_to_cpu(fd->simple.addr);
	}

	/**
	* dpaa2_fd_set_addr() - Set the addr field of frame descriptor
	* @fd: the given frame descriptor
	* @addr: the address needs to be set in frame descriptor
	*/
	static inline void dpaa2_fd_set_addr(struct dpaa2_fd *fd, dma_addr_t addr)
	{
	fd->simple.addr = cpu_to_le64(addr);
	}

	/**
	* dpaa2_fd_get_frc() - Get the frame context in the frame descriptor
	* @fd: the given frame descriptor
	*
	* Return the frame context field in the frame descriptor.
	*/
	static inline u32 dpaa2_fd_get_frc(const struct dpaa2_fd *fd)
	{
	return le32_to_cpu(fd->simple.frc);
	}

	/**
	* dpaa2_fd_set_frc() - Set the frame context in the frame descriptor
	* @fd: the given frame descriptor
	* @frc: the frame context needs to be set in frame descriptor
	*/
	static inline void dpaa2_fd_set_frc(struct dpaa2_fd *fd, u32 frc)
	{
	fd->simple.frc = cpu_to_le32(frc);
	}

	/**
	* dpaa2_fd_get_ctrl() - Get the control bits in the frame descriptor
	* @fd: the given frame descriptor
	*
	* Return the control bits field in the frame descriptor.
	*/
	static inline u32 dpaa2_fd_get_ctrl(const struct dpaa2_fd *fd)
	{
	return le32_to_cpu(fd->simple.ctrl);
	}

	/**
	* dpaa2_fd_set_ctrl() - Set the control bits in the frame descriptor
	* @fd: the given frame descriptor
	* @ctrl: the control bits to be set in the frame descriptor
	*/
	static inline void dpaa2_fd_set_ctrl(struct dpaa2_fd *fd, u32 ctrl)
	{
	fd->simple.ctrl = cpu_to_le32(ctrl);
	}

	/**
	* dpaa2_fd_get_flc() - Get the flow context in the frame descriptor
	* @fd: the given frame descriptor
	*
	* Return the flow context in the frame descriptor.
	*/
	static inline dma_addr_t dpaa2_fd_get_flc(const struct dpaa2_fd *fd)
	{
	return (dma_addr_t)le64_to_cpu(fd->simple.flc);
	}

	/**
	* dpaa2_fd_set_flc() - Set the flow context field of frame descriptor
	* @fd: the given frame descriptor
	* @flc_addr: the flow context needs to be set in frame descriptor
	*/
	static inline void dpaa2_fd_set_flc(struct dpaa2_fd *fd, dma_addr_t flc_addr)
	{
	fd->simple.flc = cpu_to_le64(flc_addr);
	}

	static inline bool dpaa2_fd_short_len(const struct dpaa2_fd *fd)
	{
	return !!((le16_to_cpu(fd->simple.format_offset) >>
	FD_SHORT_LEN_FLAG_SHIFT) & FD_SHORT_LEN_FLAG_MASK);
	}

	/**
	* dpaa2_fd_get_len() - Get the length in the frame descriptor
	* @fd: the given frame descriptor
	*
	* Return the length field in the frame descriptor.
	*/
	static inline u32 dpaa2_fd_get_len(const struct dpaa2_fd *fd)
	{
	if (dpaa2_fd_short_len(fd))
	return le32_to_cpu(fd->simple.len) & FD_SHORT_LEN_MASK;

	return le32_to_cpu(fd->simple.len);
	}

	/**
	* dpaa2_fd_set_len() - Set the length field of frame descriptor
	* @fd: the given frame descriptor
	* @len: the length needs to be set in frame descriptor
	*/
	static inline void dpaa2_fd_set_len(struct dpaa2_fd *fd, u32 len)
	{
	fd->simple.len = cpu_to_le32(len);
	}

	/**
	* dpaa2_fd_get_offset() - Get the offset field in the frame descriptor
	* @fd: the given frame descriptor
	*
	* Return the offset.
	*/
	static inline uint16_t dpaa2_fd_get_offset(const struct dpaa2_fd *fd)
	{
	return le16_to_cpu(fd->simple.format_offset) & FD_OFFSET_MASK;
	}

	/**
	* dpaa2_fd_set_offset() - Set the offset field of frame descriptor
	* @fd: the given frame descriptor
	* @offset: the offset needs to be set in frame descriptor
	*/
	static inline void dpaa2_fd_set_offset(struct dpaa2_fd *fd, uint16_t offset)
	{
	fd->simple.format_offset &= cpu_to_le16(~FD_OFFSET_MASK);
	fd->simple.format_offset \|= cpu_to_le16(offset);
	}

	/**
	* dpaa2_fd_get_format() - Get the format field in the frame descriptor
	* @fd: the given frame descriptor
	*
	* Return the format.
	*/
	static inline enum dpaa2_fd_format dpaa2_fd_get_format(
	const struct dpaa2_fd *fd)
	{
	return (enum dpaa2_fd_format)((le16_to_cpu(fd->simple.format_offset)
	>> FD_FORMAT_SHIFT) & FD_FORMAT_MASK);
	}

	/**
	* dpaa2_fd_set_format() - Set the format field of frame descriptor
	* @fd: the given frame descriptor
	* @format: the format needs to be set in frame descriptor
	*/
	static inline void dpaa2_fd_set_format(struct dpaa2_fd *fd,
	enum dpaa2_fd_format format)
	{
	fd->simple.format_offset &=
	cpu_to_le16(~(FD_FORMAT_MASK << FD_FORMAT_SHIFT));
	fd->simple.format_offset \|= cpu_to_le16(format << FD_FORMAT_SHIFT);
	}

	/**
	* dpaa2_fd_get_bpid() - Get the bpid field in the frame descriptor
	* @fd: the given frame descriptor
	*
	* Return the buffer pool id.
	*/
	static inline uint16_t dpaa2_fd_get_bpid(const struct dpaa2_fd *fd)
	{
	return le16_to_cpu(fd->simple.bpid) & FD_BPID_MASK;
	}

	/**
	* dpaa2_fd_set_bpid() - Set the bpid field of frame descriptor
	* @fd: the given frame descriptor
	* @bpid: buffer pool id to be set
	*/
	static inline void dpaa2_fd_set_bpid(struct dpaa2_fd *fd, uint16_t bpid)
	{
	fd->simple.bpid &= cpu_to_le16(~(FD_BPID_MASK));
	fd->simple.bpid \|= cpu_to_le16(bpid);
	}

	/**
	* struct dpaa2_sg_entry - the scatter-gathering structure
	* @addr: address of the sg entry
	* @len: length in this sg entry
	* @bpid: buffer pool id
	* @format_offset: format and offset fields
	*/
	struct dpaa2_sg_entry {
	__le64 addr;
	__le32 len;
	__le16 bpid;
	__le16 format_offset;
	};

	enum dpaa2_sg_format {
	dpaa2_sg_single = 0,
	dpaa2_sg_frame_data,
	dpaa2_sg_sgt_ext
	};

	/* Accessors for SG entry fields */

	/**
	* dpaa2_sg_get_addr() - Get the address from SG entry
	* @sg: the given scatter-gathering object
	*
	* Return the address.
	*/
	static inline dma_addr_t dpaa2_sg_get_addr(const struct dpaa2_sg_entry *sg)
	{
	return le64_to_cpu((dma_addr_t)sg->addr);
	}

	/**
	* dpaa2_sg_set_addr() - Set the address in SG entry
	* @sg: the given scatter-gathering object
	* @addr: the address to be set
	*/
	static inline void dpaa2_sg_set_addr(struct dpaa2_sg_entry *sg, dma_addr_t addr)
	{
	sg->addr = cpu_to_le64(addr);
	}

	static inline bool dpaa2_sg_short_len(const struct dpaa2_sg_entry *sg)
	{
	return !!((le16_to_cpu(sg->format_offset) >> SG_SHORT_LEN_FLAG_SHIFT)
	& SG_SHORT_LEN_FLAG_MASK);
	}

	/**
	* dpaa2_sg_get_len() - Get the length in SG entry
	* @sg: the given scatter-gathering object
	*
	* Return the length.
	*/
	static inline u32 dpaa2_sg_get_len(const struct dpaa2_sg_entry *sg)
	{
	if (dpaa2_sg_short_len(sg))
	return le32_to_cpu(sg->len) & SG_SHORT_LEN_MASK;

	return le32_to_cpu(sg->len);
	}

	/**
	* dpaa2_sg_set_len() - Set the length in SG entry
	* @sg: the given scatter-gathering object
	* @len: the length to be set
	*/
	static inline void dpaa2_sg_set_len(struct dpaa2_sg_entry *sg, u32 len)
	{
	sg->len = cpu_to_le32(len);
	}

	/**
	* dpaa2_sg_get_offset() - Get the offset in SG entry
	* @sg: the given scatter-gathering object
	*
	* Return the offset.
	*/
	static inline u16 dpaa2_sg_get_offset(const struct dpaa2_sg_entry *sg)
	{
	return le16_to_cpu(sg->format_offset) & SG_OFFSET_MASK;
	}

	/**
	* dpaa2_sg_set_offset() - Set the offset in SG entry
	* @sg: the given scatter-gathering object
	* @offset: the offset to be set
	*/
	static inline void dpaa2_sg_set_offset(struct dpaa2_sg_entry *sg,
	u16 offset)
	{
	sg->format_offset &= cpu_to_le16(~SG_OFFSET_MASK);
	sg->format_offset \|= cpu_to_le16(offset);
	}

	/**
	* dpaa2_sg_get_format() - Get the SG format in SG entry
	* @sg: the given scatter-gathering object
	*
	* Return the format.
	*/
	static inline enum dpaa2_sg_format
	dpaa2_sg_get_format(const struct dpaa2_sg_entry *sg)
	{
	return (enum dpaa2_sg_format)((le16_to_cpu(sg->format_offset)
	>> SG_FORMAT_SHIFT) & SG_FORMAT_MASK);
	}

	/**
	* dpaa2_sg_set_format() - Set the SG format in SG entry
	* @sg: the given scatter-gathering object
	* @format: the format to be set
	*/
	static inline void dpaa2_sg_set_format(struct dpaa2_sg_entry *sg,
	enum dpaa2_sg_format format)
	{
	sg->format_offset &= cpu_to_le16(~(SG_FORMAT_MASK << SG_FORMAT_SHIFT));
	sg->format_offset \|= cpu_to_le16(format << SG_FORMAT_SHIFT);
	}

	/**
	* dpaa2_sg_get_bpid() - Get the buffer pool id in SG entry
	* @sg: the given scatter-gathering object
	*
	* Return the bpid.
	*/
	static inline u16 dpaa2_sg_get_bpid(const struct dpaa2_sg_entry *sg)
	{
	return le16_to_cpu(sg->bpid) & SG_BPID_MASK;
	}

	/**
	* dpaa2_sg_set_bpid() - Set the buffer pool id in SG entry
	* @sg: the given scatter-gathering object
	* @bpid: the bpid to be set
	*/
	static inline void dpaa2_sg_set_bpid(struct dpaa2_sg_entry *sg, u16 bpid)
	{
	sg->bpid &= cpu_to_le16(~(SG_BPID_MASK));
	sg->bpid \|= cpu_to_le16(bpid);
	}

	/**
	* dpaa2_sg_is_final() - Check final bit in SG entry
	* @sg: the given scatter-gathering object
	*
	* Return bool.
	*/
	static inline bool dpaa2_sg_is_final(const struct dpaa2_sg_entry *sg)
	{
	return !!(le16_to_cpu(sg->format_offset) >> SG_FINAL_FLAG_SHIFT);
	}

	/**
	* dpaa2_sg_set_final() - Set the final bit in SG entry
	* @sg: the given scatter-gathering object
	* @final: the final boolean to be set
	*/
	static inline void dpaa2_sg_set_final(struct dpaa2_sg_entry *sg, bool final)
	{
	sg->format_offset &= cpu_to_le16(~(SG_FINAL_FLAG_MASK
	<< SG_FINAL_FLAG_SHIFT));
	sg->format_offset \|= cpu_to_le16(final << SG_FINAL_FLAG_SHIFT);
	}

	#endif /* __FSL_DPAA2_FD_H */