提交 bb965401 编写于 作者: Y Yinghai Lu 提交者: Jesse Barnes

PCI: show dma_mask bits in /sys

So we can catch if the driver sets an incorrect dma_mask.
Reviewed-by: NGrant Grundler <grundler@google.com>
Signed-off-by: NYinghai Lu <yinghai@kernel.org>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
上级 c6a41576
......@@ -183,6 +183,21 @@ numa_node_show(struct device *dev, struct device_attribute *attr, char *buf)
}
#endif
static ssize_t
dma_mask_bits_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct pci_dev *pdev = to_pci_dev(dev);
return sprintf (buf, "%d\n", fls64(pdev->dma_mask));
}
static ssize_t
consistent_dma_mask_bits_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
return sprintf (buf, "%d\n", fls64(dev->coherent_dma_mask));
}
static ssize_t
msi_bus_show(struct device *dev, struct device_attribute *attr, char *buf)
{
......@@ -314,6 +329,8 @@ struct device_attribute pci_dev_attrs[] = {
#ifdef CONFIG_NUMA
__ATTR_RO(numa_node),
#endif
__ATTR_RO(dma_mask_bits),
__ATTR_RO(consistent_dma_mask_bits),
__ATTR(enable, 0600, is_enabled_show, is_enabled_store),
__ATTR(broken_parity_status,(S_IRUGO|S_IWUSR),
broken_parity_status_show,broken_parity_status_store),
......
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