netdev - [PATCH net-next 4/8] net: eth: altera: tse: add optional function to start tx dma

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Date:   Wed, 14 Nov 2018 16:50:43 -0800
From:   Dalon Westergreen <dwesterg@...il.com>
To:     netdev@...r.kernel.org, dinguyen@...nel.org,
        thor.thayer@...ux.intel.com
Cc:     Dalon Westergreen <dalon.westergreen@...el.com>
Subject: [PATCH net-next 4/8] net: eth: altera: tse: add optional function to start tx dma

From: Dalon Westergreen <dalon.westergreen@...el.com>

Allow for optional start up of tx dma if the start_txdma
function is defined in altera_dmaops.

Signed-off-by: Dalon Westergreen <dalon.westergreen@...el.com>
---
 drivers/net/ethernet/altera/altera_tse.h      | 1 +
 drivers/net/ethernet/altera/altera_tse_main.c | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/altera/altera_tse.h b/drivers/net/ethernet/altera/altera_tse.h
index d5b97e02e6d6..7f246040135d 100644
--- a/drivers/net/ethernet/altera/altera_tse.h
+++ b/drivers/net/ethernet/altera/altera_tse.h
@@ -412,6 +412,7 @@ struct altera_dmaops {
 	int (*init_dma)(struct altera_tse_private *priv);
 	void (*uninit_dma)(struct altera_tse_private *priv);
 	void (*start_rxdma)(struct altera_tse_private *priv);
+	void (*start_txdma)(struct altera_tse_private *priv);
 };
 
 /* This structure is private to each device.
diff --git a/drivers/net/ethernet/altera/altera_tse_main.c b/drivers/net/ethernet/altera/altera_tse_main.c
index 0c0e8f9bba9b..f6b6a14b1ce9 100644
--- a/drivers/net/ethernet/altera/altera_tse_main.c
+++ b/drivers/net/ethernet/altera/altera_tse_main.c
@@ -1256,6 +1256,9 @@ static int tse_open(struct net_device *dev)
 
 	priv->dmaops->start_rxdma(priv);
 
+	if (priv->dmaops->start_txdma)
+		priv->dmaops->start_txdma(priv);
+
 	/* Start MAC Rx/Tx */
 	spin_lock(&priv->mac_cfg_lock);
 	tse_set_mac(priv, true);
@@ -1658,6 +1661,7 @@ static const struct altera_dmaops altera_dtype_sgdma = {
 	.init_dma = sgdma_initialize,
 	.uninit_dma = sgdma_uninitialize,
 	.start_rxdma = sgdma_start_rxdma,
+	.start_txdma = NULL,
 };
 
 static const struct altera_dmaops altera_dtype_msgdma = {
@@ -1677,6 +1681,7 @@ static const struct altera_dmaops altera_dtype_msgdma = {
 	.init_dma = msgdma_initialize,
 	.uninit_dma = msgdma_uninitialize,
 	.start_rxdma = msgdma_start_rxdma,
+	.start_txdma = NULL,
 };
 
 static const struct of_device_id altera_tse_ids[] = {
-- 
2.19.1