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PCI: show dma_mask bits in /sys

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So we can catch if the driver sets an incorrect dma_mask.

Reviewed-by: Grant Grundler <grundler@google.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Yinghai Lu 2009-11-24 18:21:21 -08:00 committed by Jesse Barnes
parent c6a415761c
commit bb965401fd
1 changed files with 17 additions and 0 deletions
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17
drivers/pci/pci-sysfs.c
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@ -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),