diff mbox series

[12/18] sgiseeq: convert to dma_alloc_noncoherent

Message ID 20200915155122.1768241-13-hch@lst.de (mailing list archive)
State Awaiting Upstream
Headers show
Series [01/18] media/v4l2: remove V4L2-FLAG-MEMORY-NON-CONSISTENT flag | expand

Commit Message

Christoph Hellwig Sept. 15, 2020, 3:51 p.m. UTC 
Use the new non-coherent DMA API including proper ownership transfers.
This includes adding additional calls to dma_sync_desc_dev as the
old syncing was rather ad-hoc.

Thanks to Thomas Bogendoerfer for debugging the ownership transfer
issues.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/net/ethernet/seeq/sgiseeq.c | 28 ++++++++++++++++++----------
 1 file changed, 18 insertions(+), 10 deletions(-)

Comments

Thomas Bogendoerfer Sept. 22, 2020, 8:51 a.m. UTC | #1 
On Tue, Sep 15, 2020 at 05:51:16PM +0200, Christoph Hellwig wrote:
> Use the new non-coherent DMA API including proper ownership transfers.
> This includes adding additional calls to dma_sync_desc_dev as the
> old syncing was rather ad-hoc.
> 
> Thanks to Thomas Bogendoerfer for debugging the ownership transfer
> issues.
> 
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
>  drivers/net/ethernet/seeq/sgiseeq.c | 28 ++++++++++++++++++----------
>  1 file changed, 18 insertions(+), 10 deletions(-)

Tested-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
diff mbox series

Patch

diff --git a/drivers/net/ethernet/seeq/sgiseeq.c b/drivers/net/ethernet/seeq/sgiseeq.c
index 8507ff2420143a..37ff25a84030eb 100644
--- a/drivers/net/ethernet/seeq/sgiseeq.c
+++ b/drivers/net/ethernet/seeq/sgiseeq.c
@@ -112,14 +112,18 @@  struct sgiseeq_private {
 
 static inline void dma_sync_desc_cpu(struct net_device *dev, void *addr)
 {
-	dma_cache_sync(dev->dev.parent, addr, sizeof(struct sgiseeq_rx_desc),
-		       DMA_FROM_DEVICE);
+	struct sgiseeq_private *sp = netdev_priv(dev);
+
+	dma_sync_single_for_cpu(dev->dev.parent, VIRT_TO_DMA(sp, addr),
+			sizeof(struct sgiseeq_rx_desc), DMA_BIDIRECTIONAL);
 }
 
 static inline void dma_sync_desc_dev(struct net_device *dev, void *addr)
 {
-	dma_cache_sync(dev->dev.parent, addr, sizeof(struct sgiseeq_rx_desc),
-		       DMA_TO_DEVICE);
+	struct sgiseeq_private *sp = netdev_priv(dev);
+
+	dma_sync_single_for_device(dev->dev.parent, VIRT_TO_DMA(sp, addr),
+			sizeof(struct sgiseeq_rx_desc), DMA_BIDIRECTIONAL);
 }
 
 static inline void hpc3_eth_reset(struct hpc3_ethregs *hregs)
@@ -403,6 +407,8 @@  static inline void sgiseeq_rx(struct net_device *dev, struct sgiseeq_private *sp
 		rd = &sp->rx_desc[sp->rx_new];
 		dma_sync_desc_cpu(dev, rd);
 	}
+	dma_sync_desc_dev(dev, rd);
+
 	dma_sync_desc_cpu(dev, &sp->rx_desc[orig_end]);
 	sp->rx_desc[orig_end].rdma.cntinfo &= ~(HPCDMA_EOR);
 	dma_sync_desc_dev(dev, &sp->rx_desc[orig_end]);
@@ -443,6 +449,7 @@  static inline void kick_tx(struct net_device *dev,
 		dma_sync_desc_cpu(dev, td);
 	}
 	if (td->tdma.cntinfo & HPCDMA_XIU) {
+		dma_sync_desc_dev(dev, td);
 		hregs->tx_ndptr = VIRT_TO_DMA(sp, td);
 		hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE;
 	}
@@ -476,6 +483,7 @@  static inline void sgiseeq_tx(struct net_device *dev, struct sgiseeq_private *sp
 		if (!(td->tdma.cntinfo & (HPCDMA_XIU)))
 			break;
 		if (!(td->tdma.cntinfo & (HPCDMA_ETXD))) {
+			dma_sync_desc_dev(dev, td);
 			if (!(status & HPC3_ETXCTRL_ACTIVE)) {
 				hregs->tx_ndptr = VIRT_TO_DMA(sp, td);
 				hregs->tx_ctrl = HPC3_ETXCTRL_ACTIVE;
@@ -740,8 +748,8 @@  static int sgiseeq_probe(struct platform_device *pdev)
 	sp = netdev_priv(dev);
 
 	/* Make private data page aligned */
-	sr = dma_alloc_attrs(&pdev->dev, sizeof(*sp->srings), &sp->srings_dma,
-			     GFP_KERNEL, DMA_ATTR_NON_CONSISTENT);
+	sr = dma_alloc_noncoherent(&pdev->dev, sizeof(*sp->srings),
+			&sp->srings_dma, DMA_BIDIRECTIONAL, GFP_KERNEL);
 	if (!sr) {
 		printk(KERN_ERR "Sgiseeq: Page alloc failed, aborting.\n");
 		err = -ENOMEM;
@@ -802,8 +810,8 @@  static int sgiseeq_probe(struct platform_device *pdev)
 	return 0;
 
 err_out_free_attrs:
-	dma_free_attrs(&pdev->dev, sizeof(*sp->srings), sp->srings,
-		       sp->srings_dma, DMA_ATTR_NON_CONSISTENT);
+	dma_free_noncoherent(&pdev->dev, sizeof(*sp->srings), sp->srings,
+		       sp->srings_dma, DMA_BIDIRECTIONAL);
 err_out_free_dev:
 	free_netdev(dev);
 
@@ -817,8 +825,8 @@  static int sgiseeq_remove(struct platform_device *pdev)
 	struct sgiseeq_private *sp = netdev_priv(dev);
 
 	unregister_netdev(dev);
-	dma_free_attrs(&pdev->dev, sizeof(*sp->srings), sp->srings,
-		       sp->srings_dma, DMA_ATTR_NON_CONSISTENT);
+	dma_free_noncoherent(&pdev->dev, sizeof(*sp->srings), sp->srings,
+		       sp->srings_dma, DMA_BIDIRECTIONAL);
 	free_netdev(dev);
 
 	return 0;