diff mbox series

[net-next,12/13] can: mcp251xfd: add TX IRQ coalescing ethtool support

Message ID 20220313085138.507062-13-mkl@pengutronix.de (mailing list archive)
State Accepted
Commit 656fc12ddaf8fbd126c2a56d50a9e226379cb2b0
Delegated to: Netdev Maintainers
Headers show
Series [net-next,01/13] can: vxcan: vxcan_xmit(): use kfree_skb() instead of kfree() to free skb | expand

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Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Pull request is its own cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 3 maintainers not CCed: thomas.kopp@microchip.com wg@grandegger.com mani@kernel.org
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 73 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Marc Kleine-Budde March 13, 2022, 8:51 a.m. UTC 
This patch adds support ethtool based configuration for the TX IRQ
coalescing added in the previous patch.

Link: https://lore.kernel.org/20220313083640.501791-12-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
---
 .../net/can/spi/mcp251xfd/mcp251xfd-ethtool.c | 23 ++++++++++++++++---
 .../net/can/spi/mcp251xfd/mcp251xfd-ring.c    |  1 +
 drivers/net/can/spi/mcp251xfd/mcp251xfd.h     |  1 +
 3 files changed, 22 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-ethtool.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-ethtool.c
index 6e49cf3411a2..6c7a57f16cc6 100644
--- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-ethtool.c
+++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-ethtool.c
@@ -58,7 +58,7 @@  static int mcp251xfd_ring_get_coalesce(struct net_device *ndev,
 				       struct netlink_ext_ack *ext_ack)
 {
 	struct mcp251xfd_priv *priv = netdev_priv(ndev);
-	u32 rx_max_frames;
+	u32 rx_max_frames, tx_max_frames;
 
 	/* The ethtool doc says:
 	 * To disable coalescing, set usecs = 0 and max_frames = 1.
@@ -71,6 +71,14 @@  static int mcp251xfd_ring_get_coalesce(struct net_device *ndev,
 	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;
 }
 
@@ -90,21 +98,28 @@  static int mcp251xfd_ring_set_coalesce(struct net_device *ndev,
 	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) &&
+	     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_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,
@@ -122,5 +137,7 @@  void mcp251xfd_ethtool_init(struct mcp251xfd_priv *priv)
 	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;
 }
diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd-ring.c b/drivers/net/can/spi/mcp251xfd/mcp251xfd-ring.c
index 3037ad3dd46b..bf3f0f150199 100644
--- a/drivers/net/can/spi/mcp251xfd/mcp251xfd-ring.c
+++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd-ring.c
@@ -442,6 +442,7 @@  const struct can_ram_config mcp251xfd_ram_config = {
 		.def[CAN_RAM_MODE_CANFD] = MCP251XFD_TX_OBJ_NUM_CANFD_DEFAULT,
 		.fifo_num = MCP251XFD_FIFO_TX_NUM,
 		.fifo_depth_min = MCP251XFD_TX_FIFO_DEPTH_MIN,
+		.fifo_depth_coalesce_min = MCP251XFD_TX_FIFO_DEPTH_COALESCE_MIN,
 	},
 	.size = MCP251XFD_RAM_SIZE,
 	.fifo_depth = MCP251XFD_FIFO_DEPTH,
diff --git a/drivers/net/can/spi/mcp251xfd/mcp251xfd.h b/drivers/net/can/spi/mcp251xfd/mcp251xfd.h
index ee2c93ddc5ed..c6cb8c3391b3 100644
--- a/drivers/net/can/spi/mcp251xfd/mcp251xfd.h
+++ b/drivers/net/can/spi/mcp251xfd/mcp251xfd.h
@@ -413,6 +413,7 @@  static_assert(MCP251XFD_TIMESTAMP_WORK_DELAY_SEC <
 #define MCP251XFD_TX_OBJ_NUM_CAN_DEFAULT 8U
 #define MCP251XFD_TX_OBJ_NUM_CANFD_DEFAULT 4U
 #define MCP251XFD_TX_FIFO_DEPTH_MIN 2U
+#define MCP251XFD_TX_FIFO_DEPTH_COALESCE_MIN 2U
 
 static_assert(MCP251XFD_FIFO_TEF_NUM == 1U);
 static_assert(MCP251XFD_FIFO_TEF_NUM == MCP251XFD_FIFO_TX_NUM);