amd-xgbe: Initial AMD 10GbE platform driver

This patch provides the initial platform driver for the AMD
10GbE device.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 375 insertions, 0 deletions

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c b/drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c
new file mode 100644
index 000000000000..6bb76d5c817b
--- /dev/null
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-debugfs.c
@@ -0,0 +1,375 @@
+/*
+ * AMD 10Gb Ethernet driver
+ *
+ * This file is available to you under your choice of the following two
+ * licenses:
+ *
+ * License 1: GPLv2
+ *
+ * Copyright (c) 2014 Advanced Micro Devices, Inc.
+ *
+ * This file is free software; you may copy, redistribute and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This file is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
+ *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
+ *     Inc. unless otherwise expressly agreed to in writing between Synopsys
+ *     and you.
+ *
+ *     The Software IS NOT an item of Licensed Software or Licensed Product
+ *     under any End User Software License Agreement or Agreement for Licensed
+ *     Product with Synopsys or any supplement thereto.  Permission is hereby
+ *     granted, free of charge, to any person obtaining a copy of this software
+ *     annotated with this license and the Software, to deal in the Software
+ *     without restriction, including without limitation the rights to use,
+ *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ *     of the Software, and to permit persons to whom the Software is furnished
+ *     to do so, subject to the following conditions:
+ *
+ *     The above copyright notice and this permission notice shall be included
+ *     in all copies or substantial portions of the Software.
+ *
+ *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
+ *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
+ *     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.
+ *
+ *
+ * License 2: Modified BSD
+ *
+ * Copyright (c) 2014 Advanced Micro Devices, Inc.
+ * All rights reserved.
+ *
+ * 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 Advanced Micro Devices, Inc. nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 <COPYRIGHT HOLDER> 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.
+ *
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *     The Synopsys DWC ETHER XGMAC Software Driver and documentation
+ *     (hereinafter "Software") is an unsupported proprietary work of Synopsys,
+ *     Inc. unless otherwise expressly agreed to in writing between Synopsys
+ *     and you.
+ *
+ *     The Software IS NOT an item of Licensed Software or Licensed Product
+ *     under any End User Software License Agreement or Agreement for Licensed
+ *     Product with Synopsys or any supplement thereto.  Permission is hereby
+ *     granted, free of charge, to any person obtaining a copy of this software
+ *     annotated with this license and the Software, to deal in the Software
+ *     without restriction, including without limitation the rights to use,
+ *     copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+ *     of the Software, and to permit persons to whom the Software is furnished
+ *     to do so, subject to the following conditions:
+ *
+ *     The above copyright notice and this permission notice shall be included
+ *     in all copies or substantial portions of the Software.
+ *
+ *     THIS SOFTWARE IS BEING DISTRIBUTED BY SYNOPSYS SOLELY ON AN "AS IS"
+ *     BASIS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ *     TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ *     PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. IN NO EVENT SHALL SYNOPSYS
+ *     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/debugfs.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include "xgbe.h"
+#include "xgbe-common.h"
+
+
+static ssize_t xgbe_common_read(char __user *buffer, size_t count,
+				loff_t *ppos, unsigned int value)
+{
+	char *buf;
+	ssize_t len;
+
+	if (*ppos != 0)
+		return 0;
+
+	buf = kasprintf(GFP_KERNEL, "0x%08x\n", value);
+	if (!buf)
+		return -ENOMEM;
+
+	if (count < strlen(buf)) {
+		kfree(buf);
+		return -ENOSPC;
+	}
+
+	len = simple_read_from_buffer(buffer, count, ppos, buf, strlen(buf));
+	kfree(buf);
+
+	return len;
+}
+
+static ssize_t xgbe_common_write(const char __user *buffer, size_t count,
+				 loff_t *ppos, unsigned int *value)
+{
+	char workarea[32];
+	ssize_t len;
+	unsigned int scan_value;
+
+	if (*ppos != 0)
+		return 0;
+
+	if (count >= sizeof(workarea))
+		return -ENOSPC;
+
+	len = simple_write_to_buffer(workarea, sizeof(workarea) - 1, ppos,
+				     buffer, count);
+	if (len < 0)
+		return len;
+
+	workarea[len] = '\0';
+	if (sscanf(workarea, "%x", &scan_value) == 1)
+		*value = scan_value;
+	else
+		return -EIO;
+
+	return len;
+}
+
+static ssize_t xgmac_reg_addr_read(struct file *filp, char __user *buffer,
+				   size_t count, loff_t *ppos)
+{
+	struct xgbe_prv_data *pdata = filp->private_data;
+
+	return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xgmac_reg);
+}
+
+static ssize_t xgmac_reg_addr_write(struct file *filp,
+				    const char __user *buffer,
+				    size_t count, loff_t *ppos)
+{
+	struct xgbe_prv_data *pdata = filp->private_data;
+
+	return xgbe_common_write(buffer, count, ppos,
+				 &pdata->debugfs_xgmac_reg);
+}
+
+static ssize_t xgmac_reg_value_read(struct file *filp, char __user *buffer,
+				    size_t count, loff_t *ppos)
+{
+	struct xgbe_prv_data *pdata = filp->private_data;
+	unsigned int value;
+
+	value = XGMAC_IOREAD(pdata, pdata->debugfs_xgmac_reg);
+
+	return xgbe_common_read(buffer, count, ppos, value);
+}
+
+static ssize_t xgmac_reg_value_write(struct file *filp,
+				     const char __user *buffer,
+				     size_t count, loff_t *ppos)
+{
+	struct xgbe_prv_data *pdata = filp->private_data;
+	unsigned int value;
+	ssize_t len;
+
+	len = xgbe_common_write(buffer, count, ppos, &value);
+	if (len < 0)
+		return len;
+
+	XGMAC_IOWRITE(pdata, pdata->debugfs_xgmac_reg, value);
+
+	return len;
+}
+
+static const struct file_operations xgmac_reg_addr_fops = {
+	.owner = THIS_MODULE,
+	.open = simple_open,
+	.read =  xgmac_reg_addr_read,
+	.write = xgmac_reg_addr_write,
+};
+
+static const struct file_operations xgmac_reg_value_fops = {
+	.owner = THIS_MODULE,
+	.open = simple_open,
+	.read =  xgmac_reg_value_read,
+	.write = xgmac_reg_value_write,
+};
+
+static ssize_t xpcs_mmd_read(struct file *filp, char __user *buffer,
+			     size_t count, loff_t *ppos)
+{
+	struct xgbe_prv_data *pdata = filp->private_data;
+
+	return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xpcs_mmd);
+}
+
+static ssize_t xpcs_mmd_write(struct file *filp, const char __user *buffer,
+			      size_t count, loff_t *ppos)
+{
+	struct xgbe_prv_data *pdata = filp->private_data;
+
+	return xgbe_common_write(buffer, count, ppos,
+				 &pdata->debugfs_xpcs_mmd);
+}
+
+static ssize_t xpcs_reg_addr_read(struct file *filp, char __user *buffer,
+				  size_t count, loff_t *ppos)
+{
+	struct xgbe_prv_data *pdata = filp->private_data;
+
+	return xgbe_common_read(buffer, count, ppos, pdata->debugfs_xpcs_reg);
+}
+
+static ssize_t xpcs_reg_addr_write(struct file *filp, const char __user *buffer,
+				   size_t count, loff_t *ppos)
+{
+	struct xgbe_prv_data *pdata = filp->private_data;
+
+	return xgbe_common_write(buffer, count, ppos,
+				 &pdata->debugfs_xpcs_reg);
+}
+
+static ssize_t xpcs_reg_value_read(struct file *filp, char __user *buffer,
+				   size_t count, loff_t *ppos)
+{
+	struct xgbe_prv_data *pdata = filp->private_data;
+	unsigned int value;
+
+	value = pdata->hw_if.read_mmd_regs(pdata, pdata->debugfs_xpcs_mmd,
+					   pdata->debugfs_xpcs_reg);
+
+	return xgbe_common_read(buffer, count, ppos, value);
+}
+
+static ssize_t xpcs_reg_value_write(struct file *filp,
+				    const char __user *buffer,
+				    size_t count, loff_t *ppos)
+{
+	struct xgbe_prv_data *pdata = filp->private_data;
+	unsigned int value;
+	ssize_t len;
+
+	len = xgbe_common_write(buffer, count, ppos, &value);
+	if (len < 0)
+		return len;
+
+	pdata->hw_if.write_mmd_regs(pdata, pdata->debugfs_xpcs_mmd,
+				    pdata->debugfs_xpcs_reg, value);
+
+	return len;
+}
+
+static const struct file_operations xpcs_mmd_fops = {
+	.owner = THIS_MODULE,
+	.open = simple_open,
+	.read =  xpcs_mmd_read,
+	.write = xpcs_mmd_write,
+};
+
+static const struct file_operations xpcs_reg_addr_fops = {
+	.owner = THIS_MODULE,
+	.open = simple_open,
+	.read =  xpcs_reg_addr_read,
+	.write = xpcs_reg_addr_write,
+};
+
+static const struct file_operations xpcs_reg_value_fops = {
+	.owner = THIS_MODULE,
+	.open = simple_open,
+	.read =  xpcs_reg_value_read,
+	.write = xpcs_reg_value_write,
+};
+
+void xgbe_debugfs_init(struct xgbe_prv_data *pdata)
+{
+	struct dentry *pfile;
+	char *buf;
+
+	/* Set defaults */
+	pdata->debugfs_xgmac_reg = 0;
+	pdata->debugfs_xpcs_mmd = 1;
+	pdata->debugfs_xpcs_reg = 0;
+
+	buf = kasprintf(GFP_KERNEL, "amd-xgbe-%s", pdata->netdev->name);
+	pdata->xgbe_debugfs = debugfs_create_dir(buf, NULL);
+	if (pdata->xgbe_debugfs == NULL) {
+		netdev_err(pdata->netdev, "debugfs_create_dir failed\n");
+		return;
+	}
+
+	pfile = debugfs_create_file("xgmac_register", 0600,
+				    pdata->xgbe_debugfs, pdata,
+				    &xgmac_reg_addr_fops);
+	if (!pfile)
+		netdev_err(pdata->netdev, "debugfs_create_file failed\n");
+
+	pfile = debugfs_create_file("xgmac_register_value", 0600,
+				    pdata->xgbe_debugfs, pdata,
+				    &xgmac_reg_value_fops);
+	if (!pfile)
+		netdev_err(pdata->netdev, "debugfs_create_file failed\n");
+
+	pfile = debugfs_create_file("xpcs_mmd", 0600,
+				    pdata->xgbe_debugfs, pdata,
+				    &xpcs_mmd_fops);
+	if (!pfile)
+		netdev_err(pdata->netdev, "debugfs_create_file failed\n");
+
+	pfile = debugfs_create_file("xpcs_register", 0600,
+				    pdata->xgbe_debugfs, pdata,
+				    &xpcs_reg_addr_fops);
+	if (!pfile)
+		netdev_err(pdata->netdev, "debugfs_create_file failed\n");
+
+	pfile = debugfs_create_file("xpcs_register_value", 0600,
+				    pdata->xgbe_debugfs, pdata,
+				    &xpcs_reg_value_fops);
+	if (!pfile)
+		netdev_err(pdata->netdev, "debugfs_create_file failed\n");
+
+	kfree(buf);
+}
+
+void xgbe_debugfs_exit(struct xgbe_prv_data *pdata)
+{
+	debugfs_remove_recursive(pdata->xgbe_debugfs);
+	pdata->xgbe_debugfs = NULL;
+}