net: bcmgenet: Add BCM2711 support

The BCM2711 needs a different maximum DMA burst length. If not set
accordingly a timeout in the transmit queue happens and no package
can be sent. So use the new compatible to derive this value.

Until now the GENET HW version was used as the platform identifier.
This doesn't work with SoC-specific modifications, so introduce a proper
platform data structure.

Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Matthias Brugger <mbrugger@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index ee4d8ef66f38bea2aa52a2898ad0c8f8de345768..120fa05a39ff201f40baa53559de9a54c50304e0 100644 (file)
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -2576,7 +2576,8 @@ static int bcmgenet_init_dma(struct bcmgenet_priv *priv)
        }
 
        /* Init rDma */
-       bcmgenet_rdma_writel(priv, DMA_MAX_BURST_LENGTH, DMA_SCB_BURST_SIZE);
+       bcmgenet_rdma_writel(priv, priv->dma_max_burst_length,
+                            DMA_SCB_BURST_SIZE);
 
        /* Initialize Rx queues */
        ret = bcmgenet_init_rx_queues(priv->dev);
@@ -2589,7 +2590,8 @@ static int bcmgenet_init_dma(struct bcmgenet_priv *priv)
        }
 
        /* Init tDma */
-       bcmgenet_tdma_writel(priv, DMA_MAX_BURST_LENGTH, DMA_SCB_BURST_SIZE);
+       bcmgenet_tdma_writel(priv, priv->dma_max_burst_length,
+                            DMA_SCB_BURST_SIZE);
 
        /* Initialize Tx queues */
        bcmgenet_init_tx_queues(priv->dev);
@@ -3420,12 +3422,48 @@ static void bcmgenet_set_hw_params(struct bcmgenet_priv *priv)
                params->words_per_bd);
 }
 
+struct bcmgenet_plat_data {
+       enum bcmgenet_version version;
+       u32 dma_max_burst_length;
+};
+
+static const struct bcmgenet_plat_data v1_plat_data = {
+       .version = GENET_V1,
+       .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
+};
+
+static const struct bcmgenet_plat_data v2_plat_data = {
+       .version = GENET_V2,
+       .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
+};
+
+static const struct bcmgenet_plat_data v3_plat_data = {
+       .version = GENET_V3,
+       .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
+};
+
+static const struct bcmgenet_plat_data v4_plat_data = {
+       .version = GENET_V4,
+       .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
+};
+
+static const struct bcmgenet_plat_data v5_plat_data = {
+       .version = GENET_V5,
+       .dma_max_burst_length = DMA_MAX_BURST_LENGTH,
+};
+
+static const struct bcmgenet_plat_data bcm2711_plat_data = {
+       .version = GENET_V5,
+       .dma_max_burst_length = 0x08,
+};
+
 static const struct of_device_id bcmgenet_match[] = {
-       { .compatible = "brcm,genet-v1", .data = (void *)GENET_V1 },
-       { .compatible = "brcm,genet-v2", .data = (void *)GENET_V2 },
-       { .compatible = "brcm,genet-v3", .data = (void *)GENET_V3 },
-       { .compatible = "brcm,genet-v4", .data = (void *)GENET_V4 },
-       { .compatible = "brcm,genet-v5", .data = (void *)GENET_V5 },
+       { .compatible = "brcm,genet-v1", .data = &v1_plat_data },
+       { .compatible = "brcm,genet-v2", .data = &v2_plat_data },
+       { .compatible = "brcm,genet-v3", .data = &v3_plat_data },
+       { .compatible = "brcm,genet-v4", .data = &v4_plat_data },
+       { .compatible = "brcm,genet-v5", .data = &v5_plat_data },
+       { .compatible = "brcm,bcm2711-genet-v5", .data = &bcm2711_plat_data },
        { },
 };
 MODULE_DEVICE_TABLE(of, bcmgenet_match);
@@ -3435,6 +3473,7 @@ static int bcmgenet_probe(struct platform_device *pdev)
        struct bcmgenet_platform_data *pd = pdev->dev.platform_data;
        struct device_node *dn = pdev->dev.of_node;
        const struct of_device_id *of_id = NULL;
+       const struct bcmgenet_plat_data *pdata;
        struct bcmgenet_priv *priv;
        struct net_device *dev;
        const void *macaddr;
@@ -3516,10 +3555,14 @@ static int bcmgenet_probe(struct platform_device *pdev)
 
        priv->dev = dev;
        priv->pdev = pdev;
-       if (of_id)
-               priv->version = (enum bcmgenet_version)of_id->data;
-       else
+       if (of_id) {
+               pdata = of_id->data;
+               priv->version = pdata->version;
+               priv->dma_max_burst_length = pdata->dma_max_burst_length;
+       } else {
                priv->version = pd->genet_version;
+               priv->dma_max_burst_length = DMA_MAX_BURST_LENGTH;
+       }
 
        priv->clk = devm_clk_get(&priv->pdev->dev, "enet");
        if (IS_ERR(priv->clk)) {

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.h b/drivers/net/ethernet/broadcom/genet/bcmgenet.h
index dbc69d8fa05f510a5e504bd4a91282f6c94e5c3b..a5659197598f5346f2cc557e1688707ec9c6ee1b 100644 (file)
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.h
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.h
@@ -664,6 +664,7 @@ struct bcmgenet_priv {
        bool crc_fwd_en;
 
        unsigned int dma_rx_chk_bit;
+       u32 dma_max_burst_length;
 
        u32 msg_enable;