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Subject[PATCH net-next 1/8] net: bcmgenet: enable NETIF_F_HIGHDMA flag
Date
This commit configures the DMA masks for the GENET driver and
sets the NETIF_F_HIGHDMA flag to report support of the feature.

Signed-off-by: Doug Berger <opendmb@gmail.com>
---
drivers/net/ethernet/broadcom/genet/bcmgenet.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index 32f1245a69e2..d9defb8b1e5f 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -2,7 +2,7 @@
/*
* Broadcom GENET (Gigabit Ethernet) controller driver
*
- * Copyright (c) 2014-2017 Broadcom
+ * Copyright (c) 2014-2019 Broadcom
*/

#define pr_fmt(fmt) "bcmgenet: " fmt
@@ -3537,7 +3537,7 @@ static int bcmgenet_probe(struct platform_device *pdev)

/* Set hardware features */
dev->hw_features |= NETIF_F_SG | NETIF_F_IP_CSUM |
- NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
+ NETIF_F_IPV6_CSUM | NETIF_F_HIGHDMA | NETIF_F_RXCSUM;

/* Request the WOL interrupt and advertise suspend if available */
priv->wol_irq_disabled = true;
@@ -3574,6 +3574,14 @@ static int bcmgenet_probe(struct platform_device *pdev)

bcmgenet_set_hw_params(priv);

+ err = -EIO;
+ if (priv->hw_params->flags & GENET_HAS_40BITS)
+ err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40));
+ if (err)
+ err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+ if (err)
+ goto err;
+
/* Mii wait queue */
init_waitqueue_head(&priv->wq);
/* Always use RX_BUF_LENGTH (2KB) buffer for all chips */
--
2.7.4
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