drivers: eth_mcux allow network buffers to be cached

danieldegrasse · carlescufi · commit f595279bd70b · 2022-08-09T12:29:18.000+02:00
Do not force network buffers into noncacheable memory, as these buffers
are internal to the driver and not used by the hardware.

Performance change (as tested with iperf on RT1050):
TCP RX: 23.7Mbps-&gt;40.6Mbps
TCP TX: 22.3Mbps-&gt;36.8Mbps

Signed-off-by: Daniel DeGrasse &lt;daniel.degrasse@nxp.com&gt;
diff --git a/drivers/ethernet/eth_mcux.c b/drivers/ethernet/eth_mcux.c
@@ -1576,9 +1576,9 @@ static void eth_mcux_err_isr(const struct device *dev)
 	ETH_MCUX_PINCTRL_DEFINE(n)					\
 									\
 	static void eth##n##_config_func(void);				\
-	static NOCACHE uint8_t						\
+	static uint8_t							\
 		tx_enet_frame_##n##_buf[NET_ETH_MAX_FRAME_SIZE];	\
-	static NOCACHE uint8_t						\
+	static uint8_t							\
 		rx_enet_frame_##n##_buf[NET_ETH_MAX_FRAME_SIZE];	\
 									\
 	static mdio_handle_t eth##n##_mdio_handle = {			\

Original file line number	Diff line number	Diff line change
`@@ -1576,9 +1576,9 @@ static void eth_mcux_err_isr(const struct device *dev)`
`1576`	`1576`	`ETH_MCUX_PINCTRL_DEFINE(n) \`
`1577`	`1577`	`\`
`1578`	`1578`	`static void eth##n##_config_func(void); \`
`1579`		`- static NOCACHE uint8_t \`
	`1579`	`+ static uint8_t \`
`1580`	`1580`	`tx_enet_frame_##n##_buf[NET_ETH_MAX_FRAME_SIZE]; \`
`1581`		`- static NOCACHE uint8_t \`
	`1581`	`+ static uint8_t \`
`1582`	`1582`	`rx_enet_frame_##n##_buf[NET_ETH_MAX_FRAME_SIZE]; \`
`1583`	`1583`	`\`
`1584`	`1584`	`static mdio_handle_t eth##n##_mdio_handle = { \`