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amd-xgbe: Set DMA mask based on hardware register value

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The hardware supplies a value that indicates the DMA range that it
is capable of using. Use this value rather than hard-coding it in
the driver.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lendacky, Thomas
2015-03-20 11:50:22 -05:00
committed by David S. Miller
parent ceb8f6be7e
commit 386d325dbd
4 changed files with 29 additions and 9 deletions
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19
drivers/net/ethernet/amd/xgbe/xgbe-main.c
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@@ -374,15 +374,6 @@ static int xgbe_probe(struct platform_device *pdev)
pdata->awcache = XGBE_DMA_SYS_AWCACHE;
}
/* Set the DMA mask */
if (!dev->dma_mask)
dev->dma_mask = &dev->coherent_dma_mask;
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(40));
if (ret) {
dev_err(dev, "dma_set_mask_and_coherent failed\n");
goto err_io;
}
/* Get the device interrupt */
ret = platform_get_irq(pdev, 0);
if (ret < 0) {
@@ -409,6 +400,16 @@ static int xgbe_probe(struct platform_device *pdev)
/* Set default configuration data */
xgbe_default_config(pdata);
/* Set the DMA mask */
if (!dev->dma_mask)
dev->dma_mask = &dev->coherent_dma_mask;
ret = dma_set_mask_and_coherent(dev,
DMA_BIT_MASK(pdata->hw_feat.dma_width));
if (ret) {
dev_err(dev, "dma_set_mask_and_coherent failed\n");
goto err_io;
}
/* Calculate the number of Tx and Rx rings to be created
* -Tx (DMA) Channels map 1-to-1 to Tx Queues so set
* the number of Tx queues to the number of Tx channels