Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 145 insertions, 0 deletions

diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-ethtool.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-ethtool.c
new file mode 100644
index 0000000000..57eeb066a9
--- /dev/null
+++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-ethtool.c
@@ -0,0 +1,145 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// mcp251xfd - Microchip MCP251xFD Family CAN controller driver
+//
+// Copyright (c) 2021, 2022 Pengutronix,
+//               Marc Kleine-Budde <kernel@pengutronix.de>
+//
+
+#include <linux/ethtool.h>
+
+#include "mcp251xfd.h"
+#include "mcp251xfd-ram.h"
+
+static void
+mcp251xfd_ring_get_ringparam(struct net_device *ndev,
+			     struct ethtool_ringparam *ring,
+			     struct kernel_ethtool_ringparam *kernel_ring,
+			     struct netlink_ext_ack *extack)
+{
+	const struct mcp251xfd_priv *priv = netdev_priv(ndev);
+	const bool fd_mode = mcp251xfd_is_fd_mode(priv);
+	struct can_ram_layout layout;
+
+	can_ram_get_layout(&layout, &mcp251xfd_ram_config, NULL, NULL, fd_mode);
+	ring->rx_max_pending = layout.max_rx;
+	ring->tx_max_pending = layout.max_tx;
+
+	ring->rx_pending = priv->rx_obj_num;
+	ring->tx_pending = priv->tx->obj_num;
+}
+
+static int
+mcp251xfd_ring_set_ringparam(struct net_device *ndev,
+			     struct ethtool_ringparam *ring,
+			     struct kernel_ethtool_ringparam *kernel_ring,
+			     struct netlink_ext_ack *extack)
+{
+	struct mcp251xfd_priv *priv = netdev_priv(ndev);
+	const bool fd_mode = mcp251xfd_is_fd_mode(priv);
+	struct can_ram_layout layout;
+
+	can_ram_get_layout(&layout, &mcp251xfd_ram_config, ring, NULL, fd_mode);
+	if ((layout.cur_rx != priv->rx_obj_num ||
+	     layout.cur_tx != priv->tx->obj_num) &&
+	    netif_running(ndev))
+		return -EBUSY;
+
+	priv->rx_obj_num = layout.cur_rx;
+	priv->rx_obj_num_coalesce_irq = layout.rx_coalesce;
+	priv->tx->obj_num = layout.cur_tx;
+	priv->tx_obj_num_coalesce_irq = layout.tx_coalesce;
+
+	return 0;
+}
+
+static int mcp251xfd_ring_get_coalesce(struct net_device *ndev,
+				       struct ethtool_coalesce *ec,
+				       struct kernel_ethtool_coalesce *kec,
+				       struct netlink_ext_ack *ext_ack)
+{
+	struct mcp251xfd_priv *priv = netdev_priv(ndev);
+	u32 rx_max_frames, tx_max_frames;
+
+	/* The ethtool doc says:
+	 * To disable coalescing, set usecs = 0 and max_frames = 1.
+	 */
+	if (priv->rx_obj_num_coalesce_irq == 0)
+		rx_max_frames = 1;
+	else
+		rx_max_frames = priv->rx_obj_num_coalesce_irq;
+
+	ec->rx_max_coalesced_frames_irq = rx_max_frames;
+	ec->rx_coalesce_usecs_irq = priv->rx_coalesce_usecs_irq;
+
+	if (priv->tx_obj_num_coalesce_irq == 0)
+		tx_max_frames = 1;
+	else
+		tx_max_frames = priv->tx_obj_num_coalesce_irq;
+
+	ec->tx_max_coalesced_frames_irq = tx_max_frames;
+	ec->tx_coalesce_usecs_irq = priv->tx_coalesce_usecs_irq;
+
+	return 0;
+}
+
+static int mcp251xfd_ring_set_coalesce(struct net_device *ndev,
+				       struct ethtool_coalesce *ec,
+				       struct kernel_ethtool_coalesce *kec,
+				       struct netlink_ext_ack *ext_ack)
+{
+	struct mcp251xfd_priv *priv = netdev_priv(ndev);
+	const bool fd_mode = mcp251xfd_is_fd_mode(priv);
+	const struct ethtool_ringparam ring = {
+		.rx_pending = priv->rx_obj_num,
+		.tx_pending = priv->tx->obj_num,
+	};
+	struct can_ram_layout layout;
+
+	can_ram_get_layout(&layout, &mcp251xfd_ram_config, &ring, ec, fd_mode);
+
+	if ((layout.rx_coalesce != priv->rx_obj_num_coalesce_irq ||
+	     ec->rx_coalesce_usecs_irq != priv->rx_coalesce_usecs_irq ||
+	     layout.tx_coalesce != priv->tx_obj_num_coalesce_irq ||
+	     ec->tx_coalesce_usecs_irq != priv->tx_coalesce_usecs_irq) &&
+	    netif_running(ndev))
+		return -EBUSY;
+
+	priv->rx_obj_num = layout.cur_rx;
+	priv->rx_obj_num_coalesce_irq = layout.rx_coalesce;
+	priv->rx_coalesce_usecs_irq = ec->rx_coalesce_usecs_irq;
+
+	priv->tx->obj_num = layout.cur_tx;
+	priv->tx_obj_num_coalesce_irq = layout.tx_coalesce;
+	priv->tx_coalesce_usecs_irq = ec->tx_coalesce_usecs_irq;
+
+	return 0;
+}
+
+static const struct ethtool_ops mcp251xfd_ethtool_ops = {
+	.supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS_IRQ |
+		ETHTOOL_COALESCE_RX_MAX_FRAMES_IRQ |
+		ETHTOOL_COALESCE_TX_USECS_IRQ |
+		ETHTOOL_COALESCE_TX_MAX_FRAMES_IRQ,
+	.get_ringparam = mcp251xfd_ring_get_ringparam,
+	.set_ringparam = mcp251xfd_ring_set_ringparam,
+	.get_coalesce = mcp251xfd_ring_get_coalesce,
+	.set_coalesce = mcp251xfd_ring_set_coalesce,
+	.get_ts_info = can_ethtool_op_get_ts_info_hwts,
+};
+
+void mcp251xfd_ethtool_init(struct mcp251xfd_priv *priv)
+{
+	struct can_ram_layout layout;
+
+	priv->ndev->ethtool_ops = &mcp251xfd_ethtool_ops;
+
+	can_ram_get_layout(&layout, &mcp251xfd_ram_config, NULL, NULL, false);
+	priv->rx_obj_num = layout.default_rx;
+	priv->tx->obj_num = layout.default_tx;
+
+	priv->rx_obj_num_coalesce_irq = 0;
+	priv->tx_obj_num_coalesce_irq = 0;
+	priv->rx_coalesce_usecs_irq = 0;
+	priv->tx_coalesce_usecs_irq = 0;
+}