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    Subject[PATCH net-next v7 06/10] dpaa_eth: add sysfs exports
    Date
    Export Frame Queue and Buffer Pool IDs through sysfs.

    Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com>
    ---
    drivers/net/ethernet/freescale/dpaa/Makefile | 2 +-
    drivers/net/ethernet/freescale/dpaa/dpaa_eth.c | 4 +
    drivers/net/ethernet/freescale/dpaa/dpaa_eth.h | 4 +
    .../net/ethernet/freescale/dpaa/dpaa_eth_sysfs.c | 165 +++++++++++++++++++++
    4 files changed, 174 insertions(+), 1 deletion(-)
    create mode 100644 drivers/net/ethernet/freescale/dpaa/dpaa_eth_sysfs.c

    diff --git a/drivers/net/ethernet/freescale/dpaa/Makefile b/drivers/net/ethernet/freescale/dpaa/Makefile
    index 43a4cfd..bfb03d4 100644
    --- a/drivers/net/ethernet/freescale/dpaa/Makefile
    +++ b/drivers/net/ethernet/freescale/dpaa/Makefile
    @@ -8,4 +8,4 @@ ccflags-y += -I$(FMAN)

    obj-$(CONFIG_FSL_DPAA_ETH) += fsl_dpa.o

    -fsl_dpa-objs += dpaa_eth.o dpaa_ethtool.o
    +fsl_dpa-objs += dpaa_eth.o dpaa_ethtool.o dpaa_eth_sysfs.o
    diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
    index d59a08c..3a610fd 100644
    --- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
    +++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
    @@ -2635,6 +2635,8 @@ static int dpaa_eth_probe(struct platform_device *pdev)
    if (err < 0)
    goto netdev_init_failed;

    + dpaa_eth_sysfs_init(&net_dev->dev);
    +
    netif_info(priv, probe, net_dev, "Probed interface %s\n",
    net_dev->name);

    @@ -2680,6 +2682,8 @@ static int dpaa_remove(struct platform_device *pdev)

    priv = netdev_priv(net_dev);

    + dpaa_eth_sysfs_remove(dev);
    +
    dev_set_drvdata(dev, NULL);
    unregister_netdev(net_dev);

    diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
    index 711fb06..44323e2 100644
    --- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
    +++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
    @@ -177,4 +177,8 @@ struct dpaa_priv {

    /* from dpaa_ethtool.c */
    extern const struct ethtool_ops dpaa_ethtool_ops;
    +
    +/* from dpaa_eth_sysfs.c */
    +void dpaa_eth_sysfs_remove(struct device *dev);
    +void dpaa_eth_sysfs_init(struct device *dev);
    #endif /* __DPAA_H */
    diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth_sysfs.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_sysfs.c
    new file mode 100644
    index 0000000..ec75d1c
    --- /dev/null
    +++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_sysfs.c
    @@ -0,0 +1,165 @@
    +/* Copyright 2008-2016 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.
    + */
    +
    +#include <linux/init.h>
    +#include <linux/module.h>
    +#include <linux/io.h>
    +#include <linux/of_net.h>
    +#include "dpaa_eth.h"
    +#include "mac.h"
    +
    +static ssize_t dpaa_eth_show_addr(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct dpaa_priv *priv = netdev_priv(to_net_dev(dev));
    + struct mac_device *mac_dev = priv->mac_dev;
    +
    + if (mac_dev)
    + return sprintf(buf, "%llx",
    + (unsigned long long)mac_dev->res->start);
    + else
    + return sprintf(buf, "none");
    +}
    +
    +static ssize_t dpaa_eth_show_fqids(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct dpaa_priv *priv = netdev_priv(to_net_dev(dev));
    + struct dpaa_fq *prev = NULL;
    + char *prevstr = NULL;
    + struct dpaa_fq *tmp;
    + struct dpaa_fq *fq;
    + u32 first_fqid = 0;
    + u32 last_fqid = 0;
    + ssize_t bytes = 0;
    + char *str;
    + int i = 0;
    +
    + list_for_each_entry_safe(fq, tmp, &priv->dpaa_fq_list, list) {
    + switch (fq->fq_type) {
    + case FQ_TYPE_RX_DEFAULT:
    + str = "Rx default";
    + break;
    + case FQ_TYPE_RX_ERROR:
    + str = "Rx error";
    + break;
    + case FQ_TYPE_TX_CONFIRM:
    + str = "Tx default confirmation";
    + break;
    + case FQ_TYPE_TX_CONF_MQ:
    + str = "Tx confirmation (mq)";
    + break;
    + case FQ_TYPE_TX_ERROR:
    + str = "Tx error";
    + break;
    + case FQ_TYPE_TX:
    + str = "Tx";
    + break;
    + default:
    + str = "Unknown";
    + }
    +
    + if (prev && (abs(fq->fqid - prev->fqid) != 1 ||
    + str != prevstr)) {
    + if (last_fqid == first_fqid)
    + bytes += sprintf(buf + bytes,
    + "%s: %d\n", prevstr, prev->fqid);
    + else
    + bytes += sprintf(buf + bytes,
    + "%s: %d - %d\n", prevstr,
    + first_fqid, last_fqid);
    + }
    +
    + if (prev && abs(fq->fqid - prev->fqid) == 1 &&
    + str == prevstr) {
    + last_fqid = fq->fqid;
    + } else {
    + first_fqid = fq->fqid;
    + last_fqid = fq->fqid;
    + }
    +
    + prev = fq;
    + prevstr = str;
    + i++;
    + }
    +
    + if (prev) {
    + if (last_fqid == first_fqid)
    + bytes += sprintf(buf + bytes, "%s: %d\n", prevstr,
    + prev->fqid);
    + else
    + bytes += sprintf(buf + bytes, "%s: %d - %d\n", prevstr,
    + first_fqid, last_fqid);
    + }
    +
    + return bytes;
    +}
    +
    +static ssize_t dpaa_eth_show_bpids(struct device *dev,
    + struct device_attribute *attr, char *buf)
    +{
    + struct dpaa_priv *priv = netdev_priv(to_net_dev(dev));
    + ssize_t bytes = 0;
    + int i = 0;
    +
    + for (i = 0; i < DPAA_BPS_NUM; i++)
    + bytes += snprintf(buf + bytes, PAGE_SIZE - bytes, "%u\n",
    + priv->dpaa_bps[i]->bpid);
    +
    + return bytes;
    +}
    +
    +static struct device_attribute dpaa_eth_attrs[] = {
    + __ATTR(device_addr, 0444, dpaa_eth_show_addr, NULL),
    + __ATTR(fqids, 0444, dpaa_eth_show_fqids, NULL),
    + __ATTR(bpids, 0444, dpaa_eth_show_bpids, NULL),
    +};
    +
    +void dpaa_eth_sysfs_init(struct device *dev)
    +{
    + int i;
    +
    + for (i = 0; i < ARRAY_SIZE(dpaa_eth_attrs); i++)
    + if (device_create_file(dev, &dpaa_eth_attrs[i])) {
    + dev_err(dev, "Error creating sysfs file\n");
    + while (i > 0)
    + device_remove_file(dev, &dpaa_eth_attrs[--i]);
    + return;
    + }
    +}
    +
    +void dpaa_eth_sysfs_remove(struct device *dev)
    +{
    + int i;
    +
    + for (i = 0; i < ARRAY_SIZE(dpaa_eth_attrs); i++)
    + device_remove_file(dev, &dpaa_eth_attrs[i]);
    +}
    --
    2.1.0
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