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| author | Alex Williamson <alex.williamson@redhat.com> | 2014-05-22 17:07:49 -0600 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2014-05-28 15:20:45 -0600 |
| commit | ec637fb2d4f7a7167c323dc1d22837d1270a21bc (patch) | |
| tree | c8c30293f6674351b9b9b53adac763fbc673ff7d /drivers/pci/quirks.c | |
| parent | 31c2b8153c58f11ddb80dfd392c16f13c2d709c6 (diff) | |
| download | talos-op-linux-ec637fb2d4f7a7167c323dc1d22837d1270a21bc.tar.gz talos-op-linux-ec637fb2d4f7a7167c323dc1d22837d1270a21bc.zip | |
PCI: Add function 0 DMA alias quirk for Ricoh devices
The existing quirk for these devices (pci_get_dma_source()) doesn't really
solve the problem; re-implement it using the DMA alias iterator. We'll
come back later and remove the existing quirk and dma_source interface.
Note that device ID 0xe822 is typically function 0 and 0xe230 has been
tested to not need the quirk and are therefore removed versus the
equivalent dma_source quirk. If there exist in other configurations we can
re-add them.
Link: https://bugzilla.redhat.com/show_bug.cgi?id=605888
Tested-by: Pat Erley <pat-lkml@erley.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/quirks.c')
| -rw-r--r-- | drivers/pci/quirks.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index e7292065a1b1..bc8ebd945612 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -3333,6 +3333,22 @@ int pci_dev_specific_reset(struct pci_dev *dev, int probe) return -ENOTTY; } +static void quirk_dma_func0_alias(struct pci_dev *dev) +{ + if (PCI_FUNC(dev->devfn) != 0) { + dev->dma_alias_devfn = PCI_DEVFN(PCI_SLOT(dev->devfn), 0); + dev->dev_flags |= PCI_DEV_FLAGS_DMA_ALIAS_DEVFN; + } +} + +/* + * https://bugzilla.redhat.com/show_bug.cgi?id=605888 + * + * Some Ricoh devices use function 0 as the PCIe requester ID for DMA. + */ +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_RICOH, 0xe832, quirk_dma_func0_alias); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_RICOH, 0xe476, quirk_dma_func0_alias); + static struct pci_dev *pci_func_0_dma_source(struct pci_dev *dev) { if (!PCI_FUNC(dev->devfn)) |
