[PATCH net-next v3 3/9] ravb: Add aligned_tx to struct ravb_hw_info
From: Biju Das <biju.das.jz@bp.renesas.com>
Date: 2021-08-18 19:08:39
Also in:
linux-renesas-soc
Subsystem:
networking drivers, renesas ethernet avb driver, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Niklas Söderlund, Linus Torvalds
R-Car Gen2 needs a 4byte aligned address for the transmission buffer, whereas R-Car Gen3 doesn't have any such restriction. Add aligned_tx to struct ravb_hw_info to select the driver to choose between aligned and unaligned tx buffers. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> --- v3: * New patch --- drivers/net/ethernet/renesas/ravb.h | 1 + drivers/net/ethernet/renesas/ravb_main.c | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/renesas/ravb.h b/drivers/net/ethernet/renesas/ravb.h
index 6ff0b2626708..4f71e5699ca1 100644
--- a/drivers/net/ethernet/renesas/ravb.h
+++ b/drivers/net/ethernet/renesas/ravb.h@@ -990,6 +990,7 @@ enum ravb_chip_id { struct ravb_hw_info { enum ravb_chip_id chip_id; + unsigned aligned_tx: 1; }; struct ravb_private {
diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index b6554e5e13af..dbccf2cd89b2 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c@@ -1930,6 +1930,7 @@ static const struct ravb_hw_info ravb_gen3_hw_info = { static const struct ravb_hw_info ravb_gen2_hw_info = { .chip_id = RCAR_GEN2, + .aligned_tx = 1, }; static const struct of_device_id ravb_match_table[] = {
@@ -2140,7 +2141,7 @@ static int ravb_probe(struct platform_device *pdev) ndev->max_mtu = 2048 - (ETH_HLEN + VLAN_HLEN + ETH_FCS_LEN); ndev->min_mtu = ETH_MIN_MTU; - priv->num_tx_desc = info->chip_id == RCAR_GEN2 ? + priv->num_tx_desc = info->aligned_tx ? NUM_TX_DESC_GEN2 : NUM_TX_DESC_GEN3; /* Set function */
--
2.17.1