diff mbox series

[net-next,v9,08/14] xsc: Add ethernet interface

Message ID 20250318151508.1376756-9-tianx@yunsilicon.com (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series xsc: ADD Yunsilicon XSC Ethernet Driver | expand

Commit Message

Xin Tian March 18, 2025, 3:15 p.m. UTC 
Implement an auxiliary driver for ethernet and initialize the
netdevice simply.

Co-developed-by: Honggang Wei <weihg@yunsilicon.com>
Signed-off-by: Honggang Wei <weihg@yunsilicon.com>
Co-developed-by: Lei Yan <jacky@yunsilicon.com>
Signed-off-by: Lei Yan <jacky@yunsilicon.com>
Signed-off-by: Xin Tian <tianx@yunsilicon.com>
---
 drivers/net/ethernet/yunsilicon/Makefile      |  1 +
 .../net/ethernet/yunsilicon/xsc/net/main.c    | 98 +++++++++++++++++++
 .../net/ethernet/yunsilicon/xsc/net/xsc_eth.h | 16 +++
 .../yunsilicon/xsc/net/xsc_eth_common.h       | 15 +++
 4 files changed, 130 insertions(+)
 create mode 100644 drivers/net/ethernet/yunsilicon/xsc/net/main.c
 create mode 100644 drivers/net/ethernet/yunsilicon/xsc/net/xsc_eth.h
 create mode 100644 drivers/net/ethernet/yunsilicon/xsc/net/xsc_eth_common.h
diff mbox series

Patch

diff --git a/drivers/net/ethernet/yunsilicon/Makefile b/drivers/net/ethernet/yunsilicon/Makefile
index 05aa35c3c..86e241b01 100644
--- a/drivers/net/ethernet/yunsilicon/Makefile
+++ b/drivers/net/ethernet/yunsilicon/Makefile
@@ -4,4 +4,5 @@ 
 # Makefile for the Yunsilicon device drivers.
 #
 
+obj-$(CONFIG_YUNSILICON_XSC_ETH) += xsc/net/
 obj-$(CONFIG_YUNSILICON_XSC_PCI) += xsc/pci/
diff --git a/drivers/net/ethernet/yunsilicon/xsc/net/main.c b/drivers/net/ethernet/yunsilicon/xsc/net/main.c
new file mode 100644
index 000000000..f5e247864
--- /dev/null
+++ b/drivers/net/ethernet/yunsilicon/xsc/net/main.c
@@ -0,0 +1,98 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (C) 2021-2025, Shanghai Yunsilicon Technology Co., Ltd.
+ * All rights reserved.
+ */
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/auxiliary_bus.h>
+
+#include "common/xsc_core.h"
+#include "xsc_eth_common.h"
+#include "xsc_eth.h"
+
+static int xsc_get_max_num_channels(struct xsc_core_device *xdev)
+{
+	return min_t(int, xdev->dev_res->eq_table.num_comp_vectors,
+		     XSC_ETH_MAX_NUM_CHANNELS);
+}
+
+static int xsc_eth_probe(struct auxiliary_device *adev,
+			 const struct auxiliary_device_id *adev_id)
+{
+	struct xsc_adev *xsc_adev = container_of(adev, struct xsc_adev, adev);
+	struct xsc_core_device *xdev = xsc_adev->xdev;
+	struct xsc_adapter *adapter;
+	struct net_device *netdev;
+	int num_chl, num_tc;
+	int err;
+
+	num_chl = xsc_get_max_num_channels(xdev);
+	num_tc = xdev->caps.max_tc;
+
+	netdev = alloc_etherdev_mqs(sizeof(struct xsc_adapter),
+				    num_chl * num_tc, num_chl);
+	if (!netdev) {
+		pr_err("alloc_etherdev_mqs failed, txq=%d, rxq=%d\n",
+		       (num_chl * num_tc), num_chl);
+		return -ENOMEM;
+	}
+
+	netdev->dev.parent = &xdev->pdev->dev;
+	adapter = netdev_priv(netdev);
+	adapter->netdev = netdev;
+	adapter->pdev = xdev->pdev;
+	adapter->dev = &adapter->pdev->dev;
+	adapter->xdev = xdev;
+	xdev->eth_priv = adapter;
+
+	err = register_netdev(netdev);
+	if (err) {
+		netdev_err(netdev, "register_netdev failed, err=%d\n", err);
+		goto err_free_netdev;
+	}
+
+	return 0;
+
+err_free_netdev:
+	free_netdev(netdev);
+
+	return err;
+}
+
+static void xsc_eth_remove(struct auxiliary_device *adev)
+{
+	struct xsc_adev *xsc_adev = container_of(adev, struct xsc_adev, adev);
+	struct xsc_core_device *xdev = xsc_adev->xdev;
+	struct xsc_adapter *adapter;
+
+	if (!xdev)
+		return;
+
+	adapter = xdev->eth_priv;
+	if (!adapter)
+		return;
+
+	unregister_netdev(adapter->netdev);
+
+	free_netdev(adapter->netdev);
+
+	xdev->eth_priv = NULL;
+}
+
+static const struct auxiliary_device_id xsc_eth_id_table[] = {
+	{ .name = XSC_PCI_DRV_NAME "." XSC_ETH_ADEV_NAME },
+	{},
+};
+MODULE_DEVICE_TABLE(auxiliary, xsc_eth_id_table);
+
+static struct auxiliary_driver xsc_eth_driver = {
+	.name = "eth",
+	.probe = xsc_eth_probe,
+	.remove = xsc_eth_remove,
+	.id_table = xsc_eth_id_table,
+};
+module_auxiliary_driver(xsc_eth_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Yunsilicon XSC ethernet driver");
diff --git a/drivers/net/ethernet/yunsilicon/xsc/net/xsc_eth.h b/drivers/net/ethernet/yunsilicon/xsc/net/xsc_eth.h
new file mode 100644
index 000000000..0c70c0d59
--- /dev/null
+++ b/drivers/net/ethernet/yunsilicon/xsc/net/xsc_eth.h
@@ -0,0 +1,16 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2021-2025, Shanghai Yunsilicon Technology Co., Ltd.
+ * All rights reserved.
+ */
+
+#ifndef __XSC_ETH_H
+#define __XSC_ETH_H
+
+struct xsc_adapter {
+	struct net_device	*netdev;
+	struct pci_dev		*pdev;
+	struct device		*dev;
+	struct xsc_core_device	*xdev;
+};
+
+#endif /* __XSC_ETH_H */
diff --git a/drivers/net/ethernet/yunsilicon/xsc/net/xsc_eth_common.h b/drivers/net/ethernet/yunsilicon/xsc/net/xsc_eth_common.h
new file mode 100644
index 000000000..b5640f05d
--- /dev/null
+++ b/drivers/net/ethernet/yunsilicon/xsc/net/xsc_eth_common.h
@@ -0,0 +1,15 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copyright (C) 2021-2025, Shanghai Yunsilicon Technology Co., Ltd.
+ * All rights reserved.
+ */
+
+#ifndef __XSC_ETH_COMMON_H
+#define __XSC_ETH_COMMON_H
+
+#define XSC_LOG_INDIR_RQT_SIZE		0x8
+
+#define XSC_INDIR_RQT_SIZE		BIT(XSC_LOG_INDIR_RQT_SIZE)
+#define XSC_ETH_MIN_NUM_CHANNELS	2
+#define XSC_ETH_MAX_NUM_CHANNELS	XSC_INDIR_RQT_SIZE
+
+#endif