linux-kernel - Re: [PATCH v3 5/9] bus: fsl-mc: dpio: add global dpaa2 definitions

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Message-ID: <584166BA.9050805@nxp.com>
Date:   Fri, 2 Dec 2016 12:19:07 +0000
From:   Laurentiu Tudor <laurentiu.tudor@....com>
To:     Stuart Yoder <stuart.yoder@....com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC:     "devel@...verdev.osuosl.org" <devel@...verdev.osuosl.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "agraf@...e.de" <agraf@...e.de>, "arnd@...db.de" <arnd@...db.de>,
        Leo Li <leoyang.li@....com>,
        Ioana Ciornei <ioana.ciornei@....com>,
        "Catalin Horghidan" <catalin.horghidan@....com>,
        Ruxandra Ioana Radulescu <ruxandra.radulescu@....com>,
        Roy Pledge <roy.pledge@....com>
Subject: Re: [PATCH v3 5/9] bus: fsl-mc: dpio: add global dpaa2 definitions

On 12/02/2016 12:41 AM, Stuart Yoder wrote:
> From: Roy Pledge <Roy.Pledge@....com>
> 
> Create header for global dpaa2 definitions.  Add definitions
> for dequeue results.
> 
> Signed-off-by: Roy Pledge <Roy.Pledge@....com>
> Signed-off-by: Stuart Yoder <stuart.yoder@....com>
> ---
>  include/linux/fsl/dpaa2-global.h | 203 +++++++++++++++++++++++++++++++++++++++
>  1 file changed, 203 insertions(+)
>  create mode 100644 include/linux/fsl/dpaa2-global.h
> 
> diff --git a/include/linux/fsl/dpaa2-global.h b/include/linux/fsl/dpaa2-global.h
> new file mode 100644
> index 0000000..3ee3f29
> --- /dev/null
> +++ b/include/linux/fsl/dpaa2-global.h
> @@ -0,0 +1,203 @@
> +/*
> + * Copyright 2014-2016 Freescale Semiconductor Inc.
> + *
> + * 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_GLOBAL_H
> +#define __FSL_DPAA2_GLOBAL_H
> +
> +#include <linux/types.h>
> +#include <linux/cpumask.h>
> +#include <linux/fsl/dpaa2-fd.h>
> +
> +struct dpaa2_dq {
> +	union {
> +		struct common {
> +			u8 verb;
> +			u8 reserved[63];
> +		} common;
> +		struct dq {
> +			u8 verb;
> +			u8 stat;
> +			__le16 seqnum;
> +			__le16 oprid;
> +			u8 reserved;
> +			u8 tok;
> +			__le32 fqid;
> +			u32 reserved2;
> +			__le32 fq_byte_cnt;
> +			__le32 fq_frm_cnt;
> +			__le64 fqd_ctx;
> +			u8 fd[32];
> +		} dq;
> +		struct scn {
> +			u8 verb;
> +			u8 stat;
> +			u8 state;
> +			u8 reserved;
> +			__le32 rid_tok;
> +			__le64 ctx;
> +		} scn;
> +	};
> +};
> +
> +

Extra blank line.

> +/* Parsing frame dequeue results */
> +/* FQ empty */
> +#define DPAA2_DQ_STAT_FQEMPTY       0x80
> +/* FQ held active */
> +#define DPAA2_DQ_STAT_HELDACTIVE    0x40
> +/* FQ force eligible */
> +#define DPAA2_DQ_STAT_FORCEELIGIBLE 0x20
> +/* valid frame */
> +#define DPAA2_DQ_STAT_VALIDFRAME    0x10
> +/* FQ ODP enable */
> +#define DPAA2_DQ_STAT_ODPVALID      0x04
> +/* volatile dequeue */
> +#define DPAA2_DQ_STAT_VOLATILE      0x02
> +/* volatile dequeue command is expired */
> +#define DPAA2_DQ_STAT_EXPIRED       0x01
> +
> +#define DQ_FQID_MASK 0x00FFFFFF
> +#define DQ_FRAME_COUNT_MASK 0x00FFFFFF

We should have these 2 macro values aligned too.

> +/**
> + * dpaa2_dq_flags() - Get the stat field of dequeue response
> + * @dq: the dequeue result.
> + */
> +static inline u32 dpaa2_dq_flags(const struct dpaa2_dq *dq)
> +{
> +	return dq->dq.stat;
> +}
> +
> +/**
> + * dpaa2_dq_is_pull() - Check whether the dq response is from a pull
> + *                      command.
> + * @dq: the dequeue result
> + *
> + * Return 1 for volatile(pull) dequeue, 0 for static dequeue.
> + */
> +static inline int dpaa2_dq_is_pull(const struct dpaa2_dq *dq)
> +{
> +	return (int)(dpaa2_dq_flags(dq) & DPAA2_DQ_STAT_VOLATILE);
> +}
> +
> +/**
> + * dpaa2_dq_is_pull_complete() - Check whether the pull command is completed.
> + * @dq: the dequeue result
> + *
> + * Return boolean.

Why not use bool for the return type then?

> + */
> +static inline int dpaa2_dq_is_pull_complete(
> +					const struct dpaa2_dq *dq)
> +{
> +	return (int)(dpaa2_dq_flags(dq) & DPAA2_DQ_STAT_EXPIRED);
> +}
> +
> +/**
> + * dpaa2_dq_seqnum() - Get the seqnum field in dequeue response
> + * @dq: the dequeue result
> + *
> + * seqnum is valid only if VALIDFRAME flag is TRUE
> + *
> + * Return seqnum.
> + */
> +static inline u16 dpaa2_dq_seqnum(const struct dpaa2_dq *dq)
> +{
> +	return le16_to_cpu(dq->dq.seqnum);
> +}
> +
> +/**
> + * dpaa2_dq_odpid() - Get the odpid field in dequeue response
> + * @dq: the dequeue result
> + *
> + * odpid is valid only if ODPVAILD flag is TRUE.

s/ODPVAILD/ODPVALID/

---
Best Regards, Laurentiu