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net: ethernet: oa_tc6: add helper function to enable zero align rx frame

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Zero align receive frame feature can be enabled to align all receive
ethernet frames data to start at the beginning of any receive data chunk
payload with a start word offset (SWO) of zero. Receive frames may begin
anywhere within the receive data chunk payload when this feature is not
enabled.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Parthiban Veerasooran <Parthiban.Veerasooran@microchip.com>
Link: https://patch.msgid.link/20240909082514.262942-13-Parthiban.Veerasooran@microchip.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Parthiban Veerasooran 2024-09-09 13:55:12 +05:30 committed by Jakub Kicinski
parent 2c6ce53544
commit afd42170c8
2 changed files with 25 additions and 0 deletions
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24
drivers/net/ethernet/oa_tc6.c
View File

@ -23,6 +23,7 @@
/* Configuration Register #0 */
#define OA_TC6_REG_CONFIG0 0x0004
#define CONFIG0_SYNC BIT(15)
#define CONFIG0_ZARFE_ENABLE BIT(12)
/* Status Register #0 */
#define OA_TC6_REG_STATUS0 0x0008
@ -1163,6 +1164,29 @@ static irqreturn_t oa_tc6_macphy_isr(int irq, void *data)
return IRQ_HANDLED;
}
/**
* oa_tc6_zero_align_receive_frame_enable - function to enable zero align
* receive frame feature.
* @tc6: oa_tc6 struct.
*
* Return: 0 on success otherwise failed.
*/
int oa_tc6_zero_align_receive_frame_enable(struct oa_tc6 *tc6)
{
u32 regval;
int ret;
ret = oa_tc6_read_register(tc6, OA_TC6_REG_CONFIG0, &regval);
if (ret)
return ret;
/* Set Zero-Align Receive Frame Enable */
regval |= CONFIG0_ZARFE_ENABLE;
return oa_tc6_write_register(tc6, OA_TC6_REG_CONFIG0, regval);
}
EXPORT_SYMBOL_GPL(oa_tc6_zero_align_receive_frame_enable);
/**
* oa_tc6_start_xmit - function for sending the tx skb which consists ethernet
* frame.

1
include/linux/oa_tc6.h
View File

@ -21,3 +21,4 @@ int oa_tc6_read_register(struct oa_tc6 *tc6, u32 address, u32 *value);
int oa_tc6_read_registers(struct oa_tc6 *tc6, u32 address, u32 value[],
u8 length);
netdev_tx_t oa_tc6_start_xmit(struct oa_tc6 *tc6, struct sk_buff *skb);
int oa_tc6_zero_align_receive_frame_enable(struct oa_tc6 *tc6);