On Wed, Aug 19, 2020 at 08:55:49AM +0200, Christoph Hellwig wrote:
> Use the proper modern API to transfer cache ownership for incoherent DMA.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> ---
> drivers/net/ethernet/seeq/sgiseeq.c | 12 ++++++++----
> 1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/net/ethernet/seeq/sgiseeq.c b/drivers/net/ethernet/seeq/sgiseeq.c
> index 39599bbb5d45b6..f91dae16d69a19 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);
> }
this breaks ethernet on IP22 completely, but I haven't figured out why, yet.
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
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