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Date: Thu, 23 Sep 2021 20:41:08 +0300
From: Sergey Shtylyov <s.shtylyov@....ru>
To: Biju Das <biju.das.jz@...renesas.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>
CC: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
Andrew Lunn <andrew@...n.ch>,
Sergei Shtylyov <sergei.shtylyov@...il.com>,
"Geert Uytterhoeven" <geert+renesas@...der.be>,
Adam Ford <aford173@...il.com>,
Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
<netdev@...r.kernel.org>, <linux-renesas-soc@...r.kernel.org>,
Chris Paterson <Chris.Paterson2@...esas.com>,
Biju Das <biju.das@...renesas.com>
Subject: Re: [RFC/PATCH 03/18] ravb: Initialize GbEthernet dmac
On 9/23/21 5:07 PM, Biju Das wrote:
> Initialize GbEthernet dmac found on RZ/G2L SoC.
DMAC (or AVB-DMAC).
> This patch also renames ravb_rcar_dmac_init to ravb_dmac_init_rcar
> to be consistent with the naming convention used in sh_eth driver.
>
> Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
> ---
> drivers/net/ethernet/renesas/ravb.h | 4 ++
> drivers/net/ethernet/renesas/ravb_main.c | 84 +++++++++++++++++++++++-
> 2 files changed, 85 insertions(+), 3 deletions(-)
[...]
> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index 2422e74d9b4f..54c4d31a6950 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
> @@ -83,6 +83,11 @@ static int ravb_config(struct net_device *ndev)
> return error;
> }
>
> +static void ravb_rgeth_set_rate(struct net_device *ndev)
What does 'rgeth' stand for? And why not the trailing part of the name, like the other cases?
> +{
> + /* Place holder */
> +}
> +
> static void ravb_set_rate(struct net_device *ndev)
> {
> struct ravb_private *priv = netdev_priv(ndev);
> @@ -217,6 +222,11 @@ static int ravb_tx_free(struct net_device *ndev, int q, bool free_txed_only)
> return free_num;
> }
>
> +static void ravb_rx_ring_free_rgeth(struct net_device *ndev, int q)
rgeth?
> +{
> + /* Place holder */
> +}
> +
> static void ravb_rx_ring_free(struct net_device *ndev, int q)
> {
> struct ravb_private *priv = netdev_priv(ndev);
> @@ -283,6 +293,11 @@ static void ravb_ring_free(struct net_device *ndev, int q)
> priv->tx_skb[q] = NULL;
> }
>
> +static void ravb_rx_ring_format_rgeth(struct net_device *ndev, int q)
rgeth?
> +{
> + /* Place holder */
> +}
> +
> static void ravb_rx_ring_format(struct net_device *ndev, int q)
> {
> struct ravb_private *priv = netdev_priv(ndev);
> @@ -356,6 +371,12 @@ static void ravb_ring_format(struct net_device *ndev, int q)
> desc->dptr = cpu_to_le32((u32)priv->tx_desc_dma[q]);
> }
>
> +static void *ravb_rgeth_alloc_rx_desc(struct net_device *ndev, int q)
Again, why rgeth is not in the symbol's tail?
> +{
> + /* Place holder */
> + return NULL;
> +}
> +
> static void *ravb_alloc_rx_desc(struct net_device *ndev, int q)
> {
> struct ravb_private *priv = netdev_priv(ndev);
> @@ -426,6 +447,11 @@ static int ravb_ring_init(struct net_device *ndev, int q)
> return -ENOMEM;
> }
>
> +static void ravb_rgeth_emac_init(struct net_device *ndev)
Same here...
> +{
> + /* Place holder */
> +}
> +
> static void ravb_rcar_emac_init(struct net_device *ndev)
> {
> /* Receive frame limit set register */
> @@ -461,7 +487,32 @@ static void ravb_emac_init(struct net_device *ndev)
> info->emac_init(ndev);
> }
>
> -static void ravb_rcar_dmac_init(struct net_device *ndev)
> +static void ravb_dmac_init_rgeth(struct net_device *ndev)
> +{
> + /* Set AVB RX */
> + ravb_write(ndev, 0x60000000, RCR);
> +
> + /* Set Max Frame Length (RTC) */
> + ravb_write(ndev, 0x7ffc0000 | RGETH_RX_BUFF_MAX, RTC);
> +
> + /* Set FIFO size */
> + ravb_write(ndev, 0x00222200, TGC);
> +
> + ravb_write(ndev, 0, TCCR);
> +
> + /* Frame receive */
> + ravb_write(ndev, RIC0_FRE0, RIC0);
> + /* Disable FIFO full warning */
> + ravb_write(ndev, 0x0, RIC1);
> + /* Receive FIFO full error, descriptor empty */
> + ravb_write(ndev, RIC2_QFE0 | RIC2_RFFE, RIC2);
> +
> + ravb_write(ndev, 0x0, RIC3);
> +
> + ravb_write(ndev, TIC_FTE0, TIC);
> +}
Ah, so 'rgeth' stands for GbEthernet... why not 'gbeth' then?
[...]
> @@ -579,6 +630,14 @@ static void ravb_rx_csum(struct sk_buff *skb)
> skb_trim(skb, skb->len - sizeof(__sum16));
> }
>
> +/* Packet receive function for Gigabit Ethernet */
> +static bool ravb_rgeth_rx(struct net_device *ndev, int *quota, int q)
> +{
> + /* Place holder */
> + return true;
> +}
> +
> +/* Packet receive function for Ethernet AVB */
> static bool ravb_rcar_rx(struct net_device *ndev, int *quota, int q)
> {
> struct ravb_private *priv = netdev_priv(ndev);
> @@ -1918,6 +1977,13 @@ static void ravb_set_rx_csum(struct net_device *ndev, bool enable)
> spin_unlock_irqrestore(&priv->lock, flags);
> }
>
> +static int ravb_set_features_rgeth(struct net_device *ndev,
> + netdev_features_t features)
> +{
> + /* Place holder */
> + return 0;
> +}
> +
> static int ravb_set_features_rcar(struct net_device *ndev,
> netdev_features_t features)
> {
> @@ -2007,7 +2073,7 @@ static const struct ravb_hw_info ravb_gen3_hw_info = {
> .receive = ravb_rcar_rx,
> .set_rate = ravb_set_rate,
> .set_feature = ravb_set_features_rcar,
> - .dmac_init = ravb_rcar_dmac_init,
> + .dmac_init = ravb_dmac_init_rcar,
> .emac_init = ravb_rcar_emac_init,
> .gstrings_stats = ravb_gstrings_stats,
> .gstrings_size = sizeof(ravb_gstrings_stats),
> @@ -2028,7 +2094,7 @@ static const struct ravb_hw_info ravb_gen2_hw_info = {
> .receive = ravb_rcar_rx,
> .set_rate = ravb_set_rate,
> .set_feature = ravb_set_features_rcar,
> - .dmac_init = ravb_rcar_dmac_init,
> + .dmac_init = ravb_dmac_init_rcar,
> .emac_init = ravb_rcar_emac_init,
> .gstrings_stats = ravb_gstrings_stats,
> .gstrings_size = sizeof(ravb_gstrings_stats),
> @@ -2039,12 +2105,24 @@ static const struct ravb_hw_info ravb_gen2_hw_info = {
> .aligned_tx = 1,
> };
>
> +static const struct ravb_hw_info rgeth_hw_info = {
> + .rx_ring_free = ravb_rx_ring_free_rgeth,
> + .rx_ring_format = ravb_rx_ring_format_rgeth,
> + .alloc_rx_desc = ravb_rgeth_alloc_rx_desc,
> + .receive = ravb_rgeth_rx,
> + .set_rate = ravb_rgeth_set_rate,
> + .set_feature = ravb_set_features_rgeth,
> + .dmac_init = ravb_dmac_init_rgeth,
> + .emac_init = ravb_rgeth_emac_init,
> +};
> +> static const struct of_device_id ravb_match_table[] = {
> { .compatible = "renesas,etheravb-r8a7790", .data = &ravb_gen2_hw_info },
> { .compatible = "renesas,etheravb-r8a7794", .data = &ravb_gen2_hw_info },
> { .compatible = "renesas,etheravb-rcar-gen2", .data = &ravb_gen2_hw_info },
> { .compatible = "renesas,etheravb-r8a7795", .data = &ravb_gen3_hw_info },
> { .compatible = "renesas,etheravb-rcar-gen3", .data = &ravb_gen3_hw_info },
> + { .compatible = "renesas,rzg2l-gbeth", .data = &rgeth_hw_info },
Mhm, I thought this parch should come lst of the series, without any placeholders...
[...]
MBR, Sergey
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