| Message ID | 1533141889-19962-3-git-send-email-bharat.kumar.gogada@xilinx.com (mailing list archive) |
|---|---|
| State | New, archived |
| Delegated to: | Bjorn Helgaas |
| Headers | show |
| Series | Use xilinx controller irq for AER handler | expand |
On Wed, Aug 01, 2018 at 10:14:48PM +0530, Bharat Kumar Gogada wrote: > Xilinx ZynqMP PS PCIe does not report AER interrupts using Advanced > Error Interrupt Message Number. The controller has dedicated interrupt line > for reporting PCIe errors along with AER. > > Using pci_dev->sysdata of root port to save controller irq number, which > will be used for registering AER irq handler. > > Signed-off-by: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com> > --- > drivers/pci/quirks.c | 29 +++++++++++++++++++++++++++++ > 1 files changed, 29 insertions(+), 0 deletions(-) > > diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c > index f439de8..e666373 100644 > --- a/drivers/pci/quirks.c > +++ b/drivers/pci/quirks.c > @@ -4753,3 +4753,32 @@ static void quirk_gpu_hda(struct pci_dev *hda) > PCI_CLASS_MULTIMEDIA_HD_AUDIO, 8, quirk_gpu_hda); > DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, > PCI_CLASS_MULTIMEDIA_HD_AUDIO, 8, quirk_gpu_hda); > + > +#if defined(CONFIG_ARCH_ZYNQMP) && defined(CONFIG_PCIE_XILINX_NWL) && \ > + defined(CONFIG_PCIEAER) > +/* > + * Xilinx ZynqMP PS PCIe does not report AER interrupts using Advanced > + * Error Interrupt Message Number. The controller has dedicated interrupt line > + * for reporting PCIe errors along with AER. Your comment says "PCIe errors along with AER", but your ifdef tests CONFIG_PCIEAER. Per PCIe r4.0, sec 6.2.6, interrupts can be generated even if AER isn't supported. Don't we want to allow that? > + */ > +#include <linux/of.h> > +#include <linux/of_irq.h> > + > +static void quirk_xilinx_aer_irq(struct pci_dev *dev) > +{ > + struct device_node *dev_node; > + > + if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT && > + pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR)) { > + dev_node = of_find_compatible_node(NULL, NULL, > + "xlnx,nwl-pcie-2.11"); > + if (!dev_node) { > + dev_err(&dev->dev, "Error could not find ZynqMP PS PCIe node\n"); Use pci_err(). Doesn't arm64 support generic kernels that may contain support for several platforms? We don't want a warning if a generic kernel happens to be running on a non-ZynqMP system. > + return; > + } > + > + dev->sysdata = dev_node->data; > + } > +} > +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_XILINX, PCI_ANY_ID, quirk_xilinx_aer_irq); > +#endif > -- > 1.7.1 >
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index f439de8..e666373 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4753,3 +4753,32 @@ static void quirk_gpu_hda(struct pci_dev *hda) PCI_CLASS_MULTIMEDIA_HD_AUDIO, 8, quirk_gpu_hda); DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_NVIDIA, PCI_ANY_ID, PCI_CLASS_MULTIMEDIA_HD_AUDIO, 8, quirk_gpu_hda); + +#if defined(CONFIG_ARCH_ZYNQMP) && defined(CONFIG_PCIE_XILINX_NWL) && \ + defined(CONFIG_PCIEAER) +/* + * Xilinx ZynqMP PS PCIe does not report AER interrupts using Advanced + * Error Interrupt Message Number. The controller has dedicated interrupt line + * for reporting PCIe errors along with AER. + */ +#include <linux/of.h> +#include <linux/of_irq.h> + +static void quirk_xilinx_aer_irq(struct pci_dev *dev) +{ + struct device_node *dev_node; + + if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT && + pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ERR)) { + dev_node = of_find_compatible_node(NULL, NULL, + "xlnx,nwl-pcie-2.11"); + if (!dev_node) { + dev_err(&dev->dev, "Error could not find ZynqMP PS PCIe node\n"); + return; + } + + dev->sysdata = dev_node->data; + } +} +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_XILINX, PCI_ANY_ID, quirk_xilinx_aer_irq); +#endif
Xilinx ZynqMP PS PCIe does not report AER interrupts using Advanced Error Interrupt Message Number. The controller has dedicated interrupt line for reporting PCIe errors along with AER. Using pci_dev->sysdata of root port to save controller irq number, which will be used for registering AER irq handler. Signed-off-by: Bharat Kumar Gogada <bharat.kumar.gogada@xilinx.com> --- drivers/pci/quirks.c | 29 +++++++++++++++++++++++++++++ 1 files changed, 29 insertions(+), 0 deletions(-)