dpaa_eth: oNIC

This is a new flavour of DPAA Ethernet Driver designed to be used in offload
scenarios similar to DPAA Offload Driver. It was developed on top of current
macless driver implementation adding 0-copy, CSUM offload and the ability to
manage its own buffer pools.

oNIC communicates with the underlying architecture by using two different O/H
ports, one for Rx and one for Tx.

Change-Id: Ifd59231470a62c272543ff4b0db1b6ab7e1893b1
Signed-off-by: Marian Rotariu <marian.rotariu@freescale.com>
Reviewed-on: http://git.am.freescale.net:8181/9023
Tested-by: Review Code-CDREVIEW <CDREVIEW@freescale.com>
Reviewed-by: Madalin-Cristian Bucur <madalin.bucur@freescale.com>
(cherry picked from commit bc625b9f52b9ba0734698cc74187475d333bf160)
Reviewed-on: http://git.am.freescale.net:8181/10258
Tested-by: Madalin-Cristian Bucur <madalin.bucur@freescale.com>

1 files changed, 201 insertions, 0 deletions

diff --git a/drivers/net/ethernet/freescale/dpa/dpaa_eth_generic_sysfs.c b/drivers/net/ethernet/freescale/dpa/dpaa_eth_generic_sysfs.c
new file mode 100644
index 0000000..912f615
--- /dev/null
+++ b/drivers/net/ethernet/freescale/dpa/dpaa_eth_generic_sysfs.c
@@ -0,0 +1,201 @@
+/* Copyright 2014 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_generic.h"
+#include "mac.h"		/* struct mac_device */
+
+static ssize_t dpaa_eth_generic_show_addr(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct dpa_generic_priv_s *priv = netdev_priv(to_net_dev(dev));
+	struct mac_device *mac_dev = priv->mac_dev;
+
+	if (mac_dev)
+		return sprintf(buf, "%llx\n",
+				(unsigned long long)mac_dev->res->start);
+	else
+		return sprintf(buf, "none\n");
+}
+
+static ssize_t dpaa_eth_generic_show_type(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	ssize_t res = 0;
+	res = sprintf(buf, "generic\n");
+
+	return res;
+}
+
+static ssize_t dpaa_eth_generic_show_fqids(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct dpa_generic_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_RX_PCD:
+			str = "Rx PCD";
+			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 = 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_generic_show_bpids(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	ssize_t bytes = 0;
+	struct dpa_generic_priv_s *priv = netdev_priv(to_net_dev(dev));
+	struct dpa_bp *rx_bp = priv->rx_bp;
+	struct dpa_bp *draining_tx_bp = priv->draining_tx_bp;
+	int i = 0;
+
+	bytes += snprintf(buf + bytes, PAGE_SIZE, "Rx buffer pools:\n");
+	for (i = 0; i < priv->rx_bp_count; i++)
+		bytes += snprintf(buf + bytes, PAGE_SIZE, "%u ",
+				rx_bp[i].bpid);
+
+	bytes += snprintf(buf + bytes, PAGE_SIZE, "\n");
+	bytes += snprintf(buf + bytes, PAGE_SIZE, "Draining buffer pool:\n");
+	bytes += snprintf(buf + bytes, PAGE_SIZE, "%u\n", draining_tx_bp->bpid);
+
+	return bytes;
+}
+
+static ssize_t dpaa_eth_generic_show_mac_regs(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct dpa_generic_priv_s *priv = netdev_priv(to_net_dev(dev));
+	struct mac_device *mac_dev = priv->mac_dev;
+	int n = 0;
+
+	if (mac_dev)
+		n = fm_mac_dump_regs(mac_dev, buf, n);
+	else
+		return sprintf(buf, "no mac control\n");
+
+	return n;
+}
+
+static struct device_attribute dpaa_eth_generic_attrs[] = {
+	__ATTR(device_addr, S_IRUGO, dpaa_eth_generic_show_addr, NULL),
+	__ATTR(device_type, S_IRUGO, dpaa_eth_generic_show_type, NULL),
+	__ATTR(fqids, S_IRUGO, dpaa_eth_generic_show_fqids, NULL),
+	__ATTR(bpids, S_IRUGO, dpaa_eth_generic_show_bpids, NULL),
+	__ATTR(mac_regs, S_IRUGO, dpaa_eth_generic_show_mac_regs, NULL),
+};
+
+void dpaa_eth_generic_sysfs_init(struct device *dev)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(dpaa_eth_generic_attrs); i++)
+		if (device_create_file(dev, &dpaa_eth_generic_attrs[i])) {
+			dev_err(dev, "Error creating sysfs file\n");
+			while (i > 0)
+				device_remove_file(dev,
+						&dpaa_eth_generic_attrs[--i]);
+			return;
+		}
+}
+
+void dpaa_eth_generic_sysfs_remove(struct device *dev)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(dpaa_eth_generic_attrs); i++)
+		device_remove_file(dev, &dpaa_eth_generic_attrs[i]);
+}