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spi: sh-msiof: Use correct device for DMA mapping with IOMMU

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To function correctly in the presence of an IOMMU, the DMA buffers must be
mapped using the DMA channel's device instead of the MSIOF platform
device's device.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Geert Uytterhoeven 2014-07-11 17:56:22 +02:00 committed by Mark Brown
parent 279d2378c9
commit 5dabcf2f27
1 changed files with 16 additions and 10 deletions
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26
drivers/spi/spi-sh-msiof.c
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@ -638,8 +638,8 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx,
if (tx) {
ier_bits |= IER_TDREQE | IER_TDMAE;
dma_sync_single_for_device(&p->pdev->dev, p->tx_dma_addr, len,
DMA_TO_DEVICE);
dma_sync_single_for_device(p->master->dma_tx->device->dev,
p->tx_dma_addr, len, DMA_TO_DEVICE);
desc_tx = dmaengine_prep_slave_single(p->master->dma_tx,
p->tx_dma_addr, len, DMA_TO_DEVICE,
DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
@ -717,7 +717,8 @@ static int sh_msiof_dma_once(struct sh_msiof_spi_priv *p, const void *tx,
}
if (rx)
dma_sync_single_for_cpu(&p->pdev->dev, p->rx_dma_addr, len,
dma_sync_single_for_cpu(p->master->dma_rx->device->dev,
p->rx_dma_addr, len,
DMA_FROM_DEVICE);
return 0;
@ -1003,6 +1004,7 @@ static int sh_msiof_request_dma(struct sh_msiof_spi_priv *p)
const struct sh_msiof_spi_info *info = dev_get_platdata(dev);
const struct resource *res;
struct spi_master *master;
struct device *tx_dev, *rx_dev;
if (!info || !info->dma_tx_id || !info->dma_rx_id)
return 0; /* The driver assumes no error */
@ -1033,21 +1035,23 @@ static int sh_msiof_request_dma(struct sh_msiof_spi_priv *p)
if (!p->rx_dma_page)
goto free_tx_page;
p->tx_dma_addr = dma_map_single(dev, p->tx_dma_page, PAGE_SIZE,
tx_dev = master->dma_tx->device->dev;
p->tx_dma_addr = dma_map_single(tx_dev, p->tx_dma_page, PAGE_SIZE,
DMA_TO_DEVICE);
if (dma_mapping_error(dev, p->tx_dma_addr))
if (dma_mapping_error(tx_dev, p->tx_dma_addr))
goto free_rx_page;
p->rx_dma_addr = dma_map_single(dev, p->rx_dma_page, PAGE_SIZE,
rx_dev = master->dma_rx->device->dev;
p->rx_dma_addr = dma_map_single(rx_dev, p->rx_dma_page, PAGE_SIZE,
DMA_FROM_DEVICE);
if (dma_mapping_error(dev, p->rx_dma_addr))
if (dma_mapping_error(rx_dev, p->rx_dma_addr))
goto unmap_tx_page;
dev_info(dev, "DMA available");
return 0;
unmap_tx_page:
dma_unmap_single(dev, p->tx_dma_addr, PAGE_SIZE, DMA_TO_DEVICE);
dma_unmap_single(tx_dev, p->tx_dma_addr, PAGE_SIZE, DMA_TO_DEVICE);
free_rx_page:
free_page((unsigned long)p->rx_dma_page);
free_tx_page:
@ -1069,8 +1073,10 @@ static void sh_msiof_release_dma(struct sh_msiof_spi_priv *p)
return;
dev = &p->pdev->dev;
dma_unmap_single(dev, p->rx_dma_addr, PAGE_SIZE, DMA_FROM_DEVICE);
dma_unmap_single(dev, p->tx_dma_addr, PAGE_SIZE, DMA_TO_DEVICE);
dma_unmap_single(master->dma_rx->device->dev, p->rx_dma_addr,
PAGE_SIZE, DMA_FROM_DEVICE);
dma_unmap_single(master->dma_tx->device->dev, p->tx_dma_addr,
PAGE_SIZE, DMA_TO_DEVICE);
free_page((unsigned long)p->rx_dma_page);
free_page((unsigned long)p->tx_dma_page);
dma_release_channel(master->dma_rx);