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dpaa_eth: fix the RX headroom size alignment

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The headroom reserved for received frames needs to be aligned to an
RX specific value. There is currently a discrepancy between the values
used in the Ethernet driver and the values passed to the FMan.
Coincidentally, the resulting aligned values are identical.

Fixes: 3c68b8fffb ("dpaa_eth: FMan erratum A050385 workaround")
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Camelia Groza <camelia.groza@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Camelia Groza 2020-11-02 20:34:36 +02:00 committed by Jakub Kicinski
parent acef159a0c
commit 7834e494f4
1 changed files with 9 additions and 5 deletions
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14
drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
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@ -2845,7 +2845,8 @@ out_error:
return err;
}
static inline u16 dpaa_get_headroom(struct dpaa_buffer_layout *bl)
static u16 dpaa_get_headroom(struct dpaa_buffer_layout *bl,
enum port_type port)
{
u16 headroom;
@ -2859,9 +2860,12 @@ static inline u16 dpaa_get_headroom(struct dpaa_buffer_layout *bl)
*
* Also make sure the headroom is a multiple of data_align bytes
*/
headroom = (u16)(bl->priv_data_size + DPAA_HWA_SIZE);
headroom = (u16)(bl[port].priv_data_size + DPAA_HWA_SIZE);
return ALIGN(headroom, DPAA_FD_DATA_ALIGNMENT);
if (port == RX)
return ALIGN(headroom, DPAA_FD_RX_DATA_ALIGNMENT);
else
return ALIGN(headroom, DPAA_FD_DATA_ALIGNMENT);
}
static int dpaa_eth_probe(struct platform_device *pdev)
@ -3029,8 +3033,8 @@ static int dpaa_eth_probe(struct platform_device *pdev)
goto free_dpaa_fqs;
}
priv->tx_headroom = dpaa_get_headroom(&priv->buf_layout[TX]);
priv->rx_headroom = dpaa_get_headroom(&priv->buf_layout[RX]);
priv->tx_headroom = dpaa_get_headroom(priv->buf_layout, TX);
priv->rx_headroom = dpaa_get_headroom(priv->buf_layout, RX);
/* All real interfaces need their ports initialized */
err = dpaa_eth_init_ports(mac_dev, dpaa_bp, &port_fqs,