Message ID | 1421179048-25370-2-git-send-email-l.stach@pengutronix.de (mailing list archive) |
---|---|
State | New, archived |
Delegated to: | Bjorn Helgaas |
Headers | show |
On Tue, Jan 13, 2015 at 08:57:28PM +0100, Lucas Stach wrote: > The fixup to enable relaxed ordering on all PCI devices was > executed unconditionally if the Tegra PCI host driver was > built into the kernel. This doesn't play nice with a > multiplatform kernel executed on other platforms which > may not need this fixup. > > Make sure to only apply the fixup if the root port is > a Tegra. > > Signed-off-by: Lucas Stach <l.stach@pengutronix.de> > Acked-by: Thierry Reding <treding@nvidia.com> > --- > v2: > - split out PCI hierarchy walk > - separate code from data by moving PCI IDs into own structure > v3: > - fixup for helper rename > - applied Thierry's ACK > --- > drivers/pci/host/pci-tegra.c | 34 +++++++++++++++++++++++++++++++++- > 1 file changed, 33 insertions(+), 1 deletion(-) > > diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c > index 6f9c29fa70e7..e87d79559723 100644 > --- a/drivers/pci/host/pci-tegra.c > +++ b/drivers/pci/host/pci-tegra.c > @@ -635,10 +635,42 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0bf1, tegra_pcie_fixup_class); > DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0e1c, tegra_pcie_fixup_class); > DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0e1d, tegra_pcie_fixup_class); > > +static const struct pci_device_id tegra_rootport_ids[] = { > + { > + /* Tegra20 4 lane root port */ > + .vendor = PCI_VENDOR_ID_NVIDIA, .device = 0x0bf0, > + .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID > + }, { > + /* Tegra20 2 lane root port */ > + .vendor = PCI_VENDOR_ID_NVIDIA, .device = 0x0bf1, > + .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID > + }, { > + /* Tegra30 4 lane root port */ > + .vendor = PCI_VENDOR_ID_NVIDIA, .device = 0x0e1c, > + .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID > + }, { > + /* Tegra30 2 lane root port */ > + .vendor = PCI_VENDOR_ID_NVIDIA, .device = 0x0e1d, > + .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID > + }, { > + /* Tegra124 4 lane root port */ > + .vendor = PCI_VENDOR_ID_NVIDIA, .device = 0x0e12, > + .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID > + }, { > + /* Tegra124 1 lane root port */ > + .vendor = PCI_VENDOR_ID_NVIDIA, .device = 0x0e13, > + .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID > + }, { > + /* sentinel */ > + } The table is OK and I'll apply it after we resolve the pci_find_root_port() thing, but it's unfortunate that we're signing up to the ongoing maintenance a table like this requires. I'm sure you've already tried other possibilities and resigned yourself to this one, though. > +}; > + > /* Tegra PCIE requires relaxed ordering */ > static void tegra_pcie_relax_enable(struct pci_dev *dev) > { > - pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_RELAX_EN); > + if (pci_match_id(tegra_rootport_ids, pci_find_root_port(dev))) > + pcie_capability_set_word(dev, PCI_EXP_DEVCTL, > + PCI_EXP_DEVCTL_RELAX_EN); > } > DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, tegra_pcie_relax_enable); > > -- > 2.1.4 > -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/pci/host/pci-tegra.c b/drivers/pci/host/pci-tegra.c index 6f9c29fa70e7..e87d79559723 100644 --- a/drivers/pci/host/pci-tegra.c +++ b/drivers/pci/host/pci-tegra.c @@ -635,10 +635,42 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0bf1, tegra_pcie_fixup_class); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0e1c, tegra_pcie_fixup_class); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_NVIDIA, 0x0e1d, tegra_pcie_fixup_class); +static const struct pci_device_id tegra_rootport_ids[] = { + { + /* Tegra20 4 lane root port */ + .vendor = PCI_VENDOR_ID_NVIDIA, .device = 0x0bf0, + .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID + }, { + /* Tegra20 2 lane root port */ + .vendor = PCI_VENDOR_ID_NVIDIA, .device = 0x0bf1, + .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID + }, { + /* Tegra30 4 lane root port */ + .vendor = PCI_VENDOR_ID_NVIDIA, .device = 0x0e1c, + .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID + }, { + /* Tegra30 2 lane root port */ + .vendor = PCI_VENDOR_ID_NVIDIA, .device = 0x0e1d, + .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID + }, { + /* Tegra124 4 lane root port */ + .vendor = PCI_VENDOR_ID_NVIDIA, .device = 0x0e12, + .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID + }, { + /* Tegra124 1 lane root port */ + .vendor = PCI_VENDOR_ID_NVIDIA, .device = 0x0e13, + .subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID + }, { + /* sentinel */ + } +}; + /* Tegra PCIE requires relaxed ordering */ static void tegra_pcie_relax_enable(struct pci_dev *dev) { - pcie_capability_set_word(dev, PCI_EXP_DEVCTL, PCI_EXP_DEVCTL_RELAX_EN); + if (pci_match_id(tegra_rootport_ids, pci_find_root_port(dev))) + pcie_capability_set_word(dev, PCI_EXP_DEVCTL, + PCI_EXP_DEVCTL_RELAX_EN); } DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, tegra_pcie_relax_enable);