| Message ID | 1445442731-28819-9-git-send-email-Suravee.Suthikulpanit@amd.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
On 2015/10/21 23:52, Suravee Suthikulpanit wrote: > This patch adds support for setting up PCI device DMA coherency from > ACPI _CCA object that should normally be specified in the DSDT node > of its PCI host bridge. > > Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> > CC: Bjorn Helgaas <bhelgaas@google.com> > CC: Catalin Marinas <catalin.marinas@arm.com> > CC: Rob Herring <robh+dt@kernel.org> > CC: Will Deacon <will.deacon@arm.com> > CC: Rafael J. Wysocki <rjw@rjwysocki.net> > CC: Murali Karicheri <m-karicheri2@ti.com> > --- > drivers/pci/probe.c | 19 ++++++++++++++----- > 1 file changed, 14 insertions(+), 5 deletions(-) > > diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c > index 09264f8..6e9f7e6 100644 > --- a/drivers/pci/probe.c > +++ b/drivers/pci/probe.c > @@ -1642,17 +1642,26 @@ static void pci_set_msi_domain(struct pci_dev *dev) > * @dev: ptr to pci_dev struct of the PCI device > * > * Function to update PCI devices's DMA configuration using the same > - * info from the OF node of host bridge's parent (if any). > + * info from the OF node or ACPI node of host bridge's parent (if any). > */ > static void pci_dma_configure(struct pci_dev *dev) > { > struct device *bridge = pci_get_host_bridge_device(dev); > > if (IS_ENABLED(CONFIG_OF) && dev->dev.of_node) { > - if (!bridge->parent) > - return; > - > - of_dma_configure(&dev->dev, bridge->parent->of_node); > + if (bridge->parent) > + of_dma_configure(&dev->dev, > + bridge->parent->of_node); > + } else if (has_acpi_companion(bridge)) { > + struct acpi_device *adev = to_acpi_node(bridge->fwnode); It's to_acpi_device_node() now in Rafael's tree. Thanks Hanjun -- 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
On Wed, Oct 21, 2015 at 08:52:11AM -0700, Suravee Suthikulpanit wrote: > This patch adds support for setting up PCI device DMA coherency from > ACPI _CCA object that should normally be specified in the DSDT node > of its PCI host bridge. > > Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> > CC: Bjorn Helgaas <bhelgaas@google.com> > CC: Catalin Marinas <catalin.marinas@arm.com> > CC: Rob Herring <robh+dt@kernel.org> > CC: Will Deacon <will.deacon@arm.com> > CC: Rafael J. Wysocki <rjw@rjwysocki.net> > CC: Murali Karicheri <m-karicheri2@ti.com> > --- > drivers/pci/probe.c | 19 ++++++++++++++----- > 1 file changed, 14 insertions(+), 5 deletions(-) > > diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c > index 09264f8..6e9f7e6 100644 > --- a/drivers/pci/probe.c > +++ b/drivers/pci/probe.c > @@ -1642,17 +1642,26 @@ static void pci_set_msi_domain(struct pci_dev *dev) > * @dev: ptr to pci_dev struct of the PCI device > * > * Function to update PCI devices's DMA configuration using the same > - * info from the OF node of host bridge's parent (if any). > + * info from the OF node or ACPI node of host bridge's parent (if any). > */ > static void pci_dma_configure(struct pci_dev *dev) > { > struct device *bridge = pci_get_host_bridge_device(dev); > > if (IS_ENABLED(CONFIG_OF) && dev->dev.of_node) { > - if (!bridge->parent) > - return; > - > - of_dma_configure(&dev->dev, bridge->parent->of_node); > + if (bridge->parent) > + of_dma_configure(&dev->dev, > + bridge->parent->of_node); This fixes the leak I mentioned earlier, since we now put the bridge device before returning. But I guess I'd still prefer to see the leak fix as a patch by itself instead of fixing it incidentally here. > + } else if (has_acpi_companion(bridge)) { > + struct acpi_device *adev = to_acpi_node(bridge->fwnode); > + enum dev_dma_attr attr = acpi_get_dma_attr(adev); > + > + if (attr != DEV_DMA_NOT_SUPPORTED) > + arch_setup_dma_ops(&dev->dev, 0, 0, NULL, > + attr == DEV_DMA_COHERENT); > + else > + WARN(1, FW_BUG "PCI device %s fail to setup DMA.\n", > + pci_name(dev)); This should use dev_warn() so the format is the same as for other messages related to "dev". Personally, I would write this as: if (attr == DEV_DMA_NOT_SUPPORTED) dev_warn(&dev->dev, "DMA not supported\n"); else arch_setup_dma_ops(...); to avoid the double negative in the conditional. > } > > pci_put_host_bridge_device(bridge); > -- > 2.1.0 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- 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/probe.c b/drivers/pci/probe.c index 09264f8..6e9f7e6 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1642,17 +1642,26 @@ static void pci_set_msi_domain(struct pci_dev *dev) * @dev: ptr to pci_dev struct of the PCI device * * Function to update PCI devices's DMA configuration using the same - * info from the OF node of host bridge's parent (if any). + * info from the OF node or ACPI node of host bridge's parent (if any). */ static void pci_dma_configure(struct pci_dev *dev) { struct device *bridge = pci_get_host_bridge_device(dev); if (IS_ENABLED(CONFIG_OF) && dev->dev.of_node) { - if (!bridge->parent) - return; - - of_dma_configure(&dev->dev, bridge->parent->of_node); + if (bridge->parent) + of_dma_configure(&dev->dev, + bridge->parent->of_node); + } else if (has_acpi_companion(bridge)) { + struct acpi_device *adev = to_acpi_node(bridge->fwnode); + enum dev_dma_attr attr = acpi_get_dma_attr(adev); + + if (attr != DEV_DMA_NOT_SUPPORTED) + arch_setup_dma_ops(&dev->dev, 0, 0, NULL, + attr == DEV_DMA_COHERENT); + else + WARN(1, FW_BUG "PCI device %s fail to setup DMA.\n", + pci_name(dev)); } pci_put_host_bridge_device(bridge);
This patch adds support for setting up PCI device DMA coherency from ACPI _CCA object that should normally be specified in the DSDT node of its PCI host bridge. Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> CC: Bjorn Helgaas <bhelgaas@google.com> CC: Catalin Marinas <catalin.marinas@arm.com> CC: Rob Herring <robh+dt@kernel.org> CC: Will Deacon <will.deacon@arm.com> CC: Rafael J. Wysocki <rjw@rjwysocki.net> CC: Murali Karicheri <m-karicheri2@ti.com> --- drivers/pci/probe.c | 19 ++++++++++++++----- 1 file changed, 14 insertions(+), 5 deletions(-)