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bus: fsl-mc: dpio: add frame descriptor and scatter/gather APIs
Add global definitions for DPAA2 frame descriptors and scatter gather entries. Signed-off-by: Roy Pledge <Roy.Pledge@nxp.com> Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Roy Pledge
Greg Kroah-Hartman
parent
2704aedb5c
commit
d3269bdc7e
448
drivers/staging/fsl-mc/include/dpaa2-fd.h
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448
drivers/staging/fsl-mc/include/dpaa2-fd.h
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/*
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* Copyright 2014-2016 Freescale Semiconductor Inc.
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* Copyright 2016 NXP
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Freescale Semiconductor nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* ALTERNATIVELY, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") as published by the Free Software
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* Foundation, either version 2 of that License or (at your option) any
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* later version.
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*
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* THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __FSL_DPAA2_FD_H
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#define __FSL_DPAA2_FD_H
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#include <linux/kernel.h>
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/**
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* DOC: DPAA2 FD - Frame Descriptor APIs for DPAA2
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*
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* Frame Descriptors (FDs) are used to describe frame data in the DPAA2.
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* Frames can be enqueued and dequeued to Frame Queues (FQs) which are consumed
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* by the various DPAA accelerators (WRIOP, SEC, PME, DCE)
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*
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* There are three types of frames: single, scatter gather, and frame lists.
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*
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* The set of APIs in this file must be used to create, manipulate and
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* query Frame Descriptors.
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*/
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/**
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* struct dpaa2_fd - Struct describing FDs
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* @words: for easier/faster copying the whole FD structure
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* @addr: address in the FD
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* @len: length in the FD
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* @bpid: buffer pool ID
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* @format_offset: format, offset, and short-length fields
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* @frc: frame context
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* @ctrl: control bits...including dd, sc, va, err, etc
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* @flc: flow context address
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*
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* This structure represents the basic Frame Descriptor used in the system.
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*/
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struct dpaa2_fd {
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union {
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u32 words[8];
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struct dpaa2_fd_simple {
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__le64 addr;
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__le32 len;
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__le16 bpid;
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__le16 format_offset;
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__le32 frc;
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__le32 ctrl;
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__le64 flc;
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} simple;
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};
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};
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#define FD_SHORT_LEN_FLAG_MASK 0x1
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#define FD_SHORT_LEN_FLAG_SHIFT 14
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#define FD_SHORT_LEN_MASK 0x3FFFF
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#define FD_OFFSET_MASK 0x0FFF
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#define FD_FORMAT_MASK 0x3
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#define FD_FORMAT_SHIFT 12
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#define SG_SHORT_LEN_FLAG_MASK 0x1
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#define SG_SHORT_LEN_FLAG_SHIFT 14
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#define SG_SHORT_LEN_MASK 0x1FFFF
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#define SG_OFFSET_MASK 0x0FFF
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#define SG_FORMAT_MASK 0x3
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#define SG_FORMAT_SHIFT 12
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#define SG_BPID_MASK 0x3FFF
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#define SG_FINAL_FLAG_MASK 0x1
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#define SG_FINAL_FLAG_SHIFT 15
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enum dpaa2_fd_format {
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dpaa2_fd_single = 0,
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dpaa2_fd_list,
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dpaa2_fd_sg
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};
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/**
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* dpaa2_fd_get_addr() - get the addr field of frame descriptor
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* @fd: the given frame descriptor
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*
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* Return the address in the frame descriptor.
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*/
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static inline dma_addr_t dpaa2_fd_get_addr(const struct dpaa2_fd *fd)
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{
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return (dma_addr_t)fd->simple.addr;
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}
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/**
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* dpaa2_fd_set_addr() - Set the addr field of frame descriptor
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* @fd: the given frame descriptor
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* @addr: the address needs to be set in frame descriptor
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*/
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static inline void dpaa2_fd_set_addr(struct dpaa2_fd *fd, dma_addr_t addr)
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{
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fd->simple.addr = addr;
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}
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/**
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* dpaa2_fd_get_frc() - Get the frame context in the frame descriptor
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* @fd: the given frame descriptor
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*
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* Return the frame context field in the frame descriptor.
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*/
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static inline u32 dpaa2_fd_get_frc(const struct dpaa2_fd *fd)
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{
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return fd->simple.frc;
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}
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/**
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* dpaa2_fd_set_frc() - Set the frame context in the frame descriptor
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* @fd: the given frame descriptor
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* @frc: the frame context needs to be set in frame descriptor
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*/
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static inline void dpaa2_fd_set_frc(struct dpaa2_fd *fd, u32 frc)
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{
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fd->simple.frc = frc;
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}
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/**
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* dpaa2_fd_get_ctrl() - Get the control bits in the frame descriptor
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* @fd: the given frame descriptor
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*
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* Return the control bits field in the frame descriptor.
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*/
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static inline u32 dpaa2_fd_get_ctrl(const struct dpaa2_fd *fd)
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{
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return fd->simple.ctrl;
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}
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/**
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* dpaa2_fd_set_ctrl() - Set the control bits in the frame descriptor
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* @fd: the given frame descriptor
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* @ctrl: the control bits to be set in the frame descriptor
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*/
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static inline void dpaa2_fd_set_ctrl(struct dpaa2_fd *fd, u32 ctrl)
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{
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fd->simple.ctrl = ctrl;
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}
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/**
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* dpaa2_fd_get_flc() - Get the flow context in the frame descriptor
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* @fd: the given frame descriptor
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*
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* Return the flow context in the frame descriptor.
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*/
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static inline dma_addr_t dpaa2_fd_get_flc(const struct dpaa2_fd *fd)
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{
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return (dma_addr_t)fd->simple.flc;
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}
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/**
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* dpaa2_fd_set_flc() - Set the flow context field of frame descriptor
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* @fd: the given frame descriptor
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* @flc_addr: the flow context needs to be set in frame descriptor
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*/
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static inline void dpaa2_fd_set_flc(struct dpaa2_fd *fd, dma_addr_t flc_addr)
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{
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fd->simple.flc = flc_addr;
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}
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static inline bool dpaa2_fd_short_len(const struct dpaa2_fd *fd)
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{
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return !!((fd->simple.format_offset >> FD_SHORT_LEN_FLAG_SHIFT)
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& FD_SHORT_LEN_FLAG_MASK);
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}
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/**
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* dpaa2_fd_get_len() - Get the length in the frame descriptor
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* @fd: the given frame descriptor
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*
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* Return the length field in the frame descriptor.
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*/
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static inline u32 dpaa2_fd_get_len(const struct dpaa2_fd *fd)
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{
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if (dpaa2_fd_short_len(fd))
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return fd->simple.len & FD_SHORT_LEN_MASK;
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return fd->simple.len;
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}
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/**
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* dpaa2_fd_set_len() - Set the length field of frame descriptor
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* @fd: the given frame descriptor
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* @len: the length needs to be set in frame descriptor
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*/
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static inline void dpaa2_fd_set_len(struct dpaa2_fd *fd, u32 len)
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{
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fd->simple.len = len;
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}
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/**
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* dpaa2_fd_get_offset() - Get the offset field in the frame descriptor
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* @fd: the given frame descriptor
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*
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* Return the offset.
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*/
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static inline uint16_t dpaa2_fd_get_offset(const struct dpaa2_fd *fd)
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{
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return fd->simple.format_offset & FD_OFFSET_MASK;
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}
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/**
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* dpaa2_fd_set_offset() - Set the offset field of frame descriptor
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* @fd: the given frame descriptor
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* @offset: the offset needs to be set in frame descriptor
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*/
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static inline void dpaa2_fd_set_offset(struct dpaa2_fd *fd, uint16_t offset)
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{
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fd->simple.format_offset &= ~FD_OFFSET_MASK;
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fd->simple.format_offset |= offset;
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}
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/**
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* dpaa2_fd_get_format() - Get the format field in the frame descriptor
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* @fd: the given frame descriptor
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*
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* Return the format.
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*/
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static inline enum dpaa2_fd_format dpaa2_fd_get_format(
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const struct dpaa2_fd *fd)
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{
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return (enum dpaa2_fd_format)((fd->simple.format_offset
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>> FD_FORMAT_SHIFT) & FD_FORMAT_MASK);
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}
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/**
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* dpaa2_fd_set_format() - Set the format field of frame descriptor
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* @fd: the given frame descriptor
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* @format: the format needs to be set in frame descriptor
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*/
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static inline void dpaa2_fd_set_format(struct dpaa2_fd *fd,
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enum dpaa2_fd_format format)
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{
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fd->simple.format_offset &= ~(FD_FORMAT_MASK << FD_FORMAT_SHIFT);
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fd->simple.format_offset |= format << FD_FORMAT_SHIFT;
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}
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/**
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* dpaa2_fd_get_bpid() - Get the bpid field in the frame descriptor
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* @fd: the given frame descriptor
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*
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* Return the buffer pool id.
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*/
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static inline uint16_t dpaa2_fd_get_bpid(const struct dpaa2_fd *fd)
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{
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return fd->simple.bpid;
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}
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/**
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* dpaa2_fd_set_bpid() - Set the bpid field of frame descriptor
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* @fd: the given frame descriptor
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* @bpid: buffer pool id to be set
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*/
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static inline void dpaa2_fd_set_bpid(struct dpaa2_fd *fd, uint16_t bpid)
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{
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fd->simple.bpid = bpid;
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}
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/**
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* struct dpaa2_sg_entry - the scatter-gathering structure
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* @addr: address of the sg entry
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* @len: length in this sg entry
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* @bpid: buffer pool id
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* @format_offset: format and offset fields
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*/
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struct dpaa2_sg_entry {
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__le64 addr;
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__le32 len;
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__le16 bpid;
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__le16 format_offset;
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};
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enum dpaa2_sg_format {
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dpaa2_sg_single = 0,
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dpaa2_sg_frame_data,
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dpaa2_sg_sgt_ext
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};
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/* Accessors for SG entry fields */
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/**
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* dpaa2_sg_get_addr() - Get the address from SG entry
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* @sg: the given scatter-gathering object
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*
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* Return the address.
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*/
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static inline dma_addr_t dpaa2_sg_get_addr(const struct dpaa2_sg_entry *sg)
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{
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return le64_to_cpu((dma_addr_t)sg->addr);
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}
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/**
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* dpaa2_sg_set_addr() - Set the address in SG entry
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* @sg: the given scatter-gathering object
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* @addr: the address to be set
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*/
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static inline void dpaa2_sg_set_addr(struct dpaa2_sg_entry *sg, dma_addr_t addr)
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{
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sg->addr = cpu_to_le64(addr);
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}
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static inline bool dpaa2_sg_short_len(const struct dpaa2_sg_entry *sg)
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{
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return !!((le16_to_cpu(sg->format_offset) >> SG_SHORT_LEN_FLAG_SHIFT)
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& SG_SHORT_LEN_FLAG_MASK);
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}
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/**
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* dpaa2_sg_get_len() - Get the length in SG entry
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* @sg: the given scatter-gathering object
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*
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* Return the length.
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*/
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static inline u32 dpaa2_sg_get_len(const struct dpaa2_sg_entry *sg)
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{
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if (dpaa2_sg_short_len(sg))
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return le32_to_cpu(sg->len) & SG_SHORT_LEN_MASK;
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return le32_to_cpu(sg->len);
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}
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/**
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* dpaa2_sg_set_len() - Set the length in SG entry
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* @sg: the given scatter-gathering object
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* @len: the length to be set
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*/
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static inline void dpaa2_sg_set_len(struct dpaa2_sg_entry *sg, u32 len)
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{
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sg->len = cpu_to_le32(len);
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}
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/**
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* dpaa2_sg_get_offset() - Get the offset in SG entry
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* @sg: the given scatter-gathering object
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*
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* Return the offset.
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*/
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static inline u16 dpaa2_sg_get_offset(const struct dpaa2_sg_entry *sg)
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{
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return le16_to_cpu(sg->format_offset) & SG_OFFSET_MASK;
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}
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/**
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* dpaa2_sg_set_offset() - Set the offset in SG entry
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* @sg: the given scatter-gathering object
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* @offset: the offset to be set
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*/
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static inline void dpaa2_sg_set_offset(struct dpaa2_sg_entry *sg,
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u16 offset)
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{
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sg->format_offset &= cpu_to_le16(~SG_OFFSET_MASK);
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sg->format_offset |= cpu_to_le16(offset);
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}
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/**
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* dpaa2_sg_get_format() - Get the SG format in SG entry
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* @sg: the given scatter-gathering object
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*
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* Return the format.
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*/
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static inline enum dpaa2_sg_format
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dpaa2_sg_get_format(const struct dpaa2_sg_entry *sg)
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{
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return (enum dpaa2_sg_format)((le16_to_cpu(sg->format_offset)
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>> SG_FORMAT_SHIFT) & SG_FORMAT_MASK);
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}
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/**
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* dpaa2_sg_set_format() - Set the SG format in SG entry
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* @sg: the given scatter-gathering object
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* @format: the format to be set
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*/
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static inline void dpaa2_sg_set_format(struct dpaa2_sg_entry *sg,
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enum dpaa2_sg_format format)
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{
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sg->format_offset &= cpu_to_le16(~(SG_FORMAT_MASK << SG_FORMAT_SHIFT));
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sg->format_offset |= cpu_to_le16(format << SG_FORMAT_SHIFT);
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}
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/**
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* dpaa2_sg_get_bpid() - Get the buffer pool id in SG entry
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* @sg: the given scatter-gathering object
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*
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* Return the bpid.
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*/
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static inline u16 dpaa2_sg_get_bpid(const struct dpaa2_sg_entry *sg)
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{
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return le16_to_cpu(sg->bpid) & SG_BPID_MASK;
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}
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/**
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* dpaa2_sg_set_bpid() - Set the buffer pool id in SG entry
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* @sg: the given scatter-gathering object
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* @bpid: the bpid to be set
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*/
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static inline void dpaa2_sg_set_bpid(struct dpaa2_sg_entry *sg, u16 bpid)
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{
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sg->bpid &= cpu_to_le16(~(SG_BPID_MASK));
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sg->bpid |= cpu_to_le16(bpid);
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}
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/**
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* dpaa2_sg_is_final() - Check final bit in SG entry
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* @sg: the given scatter-gathering object
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*
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* Return bool.
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*/
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static inline bool dpaa2_sg_is_final(const struct dpaa2_sg_entry *sg)
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{
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return !!(le16_to_cpu(sg->format_offset) >> SG_FINAL_FLAG_SHIFT);
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}
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/**
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* dpaa2_sg_set_final() - Set the final bit in SG entry
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* @sg: the given scatter-gathering object
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* @final: the final boolean to be set
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*/
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static inline void dpaa2_sg_set_final(struct dpaa2_sg_entry *sg, bool final)
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{
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sg->format_offset &= cpu_to_le16(~(SG_FINAL_FLAG_MASK
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<< SG_FINAL_FLAG_SHIFT));
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sg->format_offset |= cpu_to_le16(final << SG_FINAL_FLAG_SHIFT);
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}
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#endif /* __FSL_DPAA2_FD_H */
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