[PATCH RFC 08/11] dpaa_eth: add sysfs exports

[Madalin Bucur]

Export Frame Queue and Buffer Pool IDs through sysfs.

Signed-off-by: Madalin Bucur <madalin.bucur@xxxxxxxxxxxxx>
---
 drivers/net/ethernet/freescale/dpaa/Makefile       |   2 +-
 drivers/net/ethernet/freescale/dpaa/dpaa_eth.c     |   2 +
 drivers/net/ethernet/freescale/dpaa/dpaa_eth.h     |   2 +
 .../net/ethernet/freescale/dpaa/dpaa_eth_common.c  |   2 +
 .../net/ethernet/freescale/dpaa/dpaa_eth_sysfs.c   | 168 +++++++++++++++++++++
 5 files changed, 175 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 fe9ba65..53e5dcc 100644
--- a/drivers/net/ethernet/freescale/dpaa/Makefile
+++ b/drivers/net/ethernet/freescale/dpaa/Makefile
@@ -11,4 +11,4 @@ ccflags-y += -I$(FMAN)/flib
 
 obj-$(CONFIG_FSL_DPAA_ETH) += fsl_dpa.o
 
-fsl_dpa-objs += dpaa_eth.o dpaa_eth_sg.o dpaa_eth_common.o dpaa_ethtool.o
+fsl_dpa-objs += dpaa_eth.o dpaa_eth_sg.o dpaa_eth_common.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 63d7e90..22c2e8b 100644
--- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
@@ -857,6 +857,8 @@ dpaa_eth_priv_probe(struct platform_device *pdev)
 	if (err < 0)
 		goto netdev_init_failed;
 
+	dpaa_eth_sysfs_init(&net_dev->dev);
+
 #ifdef CONFIG_PM
 	device_set_wakeup_capable(dev, true);
 #endif
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
index 0f216f6..08cda76 100644
--- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.h
@@ -353,6 +353,8 @@ static inline u16 dpa_get_headroom(struct dpa_buffer_layout_s *bl)
 	return bl->data_align ? ALIGN(headroom, bl->data_align) : headroom;
 }
 
+void dpaa_eth_sysfs_remove(struct device *dev);
+void dpaa_eth_sysfs_init(struct device *dev);
 
 void dpa_private_napi_del(struct net_device *net_dev);
 
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c
index acefc2b..7921b64 100644
--- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_common.c
@@ -294,6 +294,8 @@ int __cold dpa_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_sysfs.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_sysfs.c
new file mode 100644
index 0000000..c2b59b9
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth_sysfs.c
@@ -0,0 +1,168 @@
+/* Copyright 2008-2015 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/kthread.h>
+#include <linux/io.h>
+#include <linux/of_net.h>
+#include "dpaa_eth.h"
+#include "mac.h"		/* struct mac_device */
+
+static ssize_t dpaa_eth_show_addr(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct dpa_priv_s *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 dpa_priv_s *priv = netdev_priv(to_net_dev(dev));
+	ssize_t bytes = 0;
+	int i = 0;
+	char *str;
+	struct dpa_fq *fq;
+	struct dpa_fq *tmp;
+	struct dpa_fq *prev = NULL;
+	u32 first_fqid = 0;
+	u32 last_fqid = 0;
+	char *prevstr = NULL;
+
+	list_for_each_entry_safe(fq, tmp, &priv->dpa_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)
+{
+	ssize_t bytes = 0;
+	struct dpa_priv_s *priv = netdev_priv(to_net_dev(dev));
+	struct dpa_bp *dpa_bp = priv->dpa_bp;
+	int i = 0;
+
+	for (i = 0; i < priv->bp_count; i++)
+		bytes += snprintf(buf + bytes, PAGE_SIZE, "%u\n",
+				dpa_bp[i].bpid);
+
+	return bytes;
+}
+
+static struct device_attribute dpaa_eth_attrs[] = {
+	__ATTR(device_addr, S_IRUGO, dpaa_eth_show_addr, NULL),
+	__ATTR(fqids, S_IRUGO, dpaa_eth_show_fqids, NULL),
+	__ATTR(bpids, S_IRUGO, 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;
+		}
+}
+EXPORT_SYMBOL(dpaa_eth_sysfs_init);
+
+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]);
+}
-- 
1.7.11.7

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