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SubjectRe: [PATCH v6 02/10] PCI/RCEC: Bind RCEC devices to the Root Port driver
On Tue, Sep 22, 2020 at 02:38:51PM -0700, Sean V Kelley wrote:
> From: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
>
> If a Root Complex Integrated Endpoint (RCiEP) is implemented, errors may
> optionally be sent to a corresponding Root Complex Event Collector (RCEC).
> Each RCiEP must be associated with no more than one RCEC. Interface errors
> are reported to the OS by RCECs.
>
> For an RCEC (technically not a Bridge), error messages "received" from
> associated RCiEPs must be enabled for "transmission" in order to cause a
> System Error via the Root Control register or (when the Advanced Error
> Reporting Capability is present) reporting via the Root Error Command
> register and logging in the Root Error Status register and Error Source
> Identification register.
>
> Given the commonality with Root Ports and the need to also support AER
> and PME services for RCECs, extend the Root Port driver to support RCEC
> devices through the addition of the RCEC Class ID to the driver
> structure.
>
> Co-developed-by: Sean V Kelley <sean.v.kelley@intel.com>
> Signed-off-by: Sean V Kelley <sean.v.kelley@intel.com>
> Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> ---
> drivers/pci/pcie/portdrv_core.c | 8 ++++----
> drivers/pci/pcie/portdrv_pci.c | 5 ++++-
> 2 files changed, 8 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
> index 50a9522ab07d..99769c636775 100644
> --- a/drivers/pci/pcie/portdrv_core.c
> +++ b/drivers/pci/pcie/portdrv_core.c
> @@ -234,11 +234,11 @@ static int get_port_device_capability(struct pci_dev *dev)
> #endif
>
> /*
> - * Root ports are capable of generating PME too. Root Complex
> - * Event Collectors can also generate PMEs, but we don't handle
> - * those yet.
> + * Root ports and Root Complex Event Collectors are capable
> + * of generating PME.
> */
> - if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT &&
> + if ((pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT ||
> + pci_pcie_type(dev) == PCI_EXP_TYPE_RC_EC) &&

It seems like this change belongs in patch 09/10, where we change
pme.c so it claims both Root Ports and RCECs. Does this hunk
accomplish anything before 09/10?

> (pcie_ports_native || host->native_pme)) {
> services |= PCIE_PORT_SERVICE_PME;
>
> diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c
> index 3a3ce40ae1ab..4d880679b9b1 100644
> --- a/drivers/pci/pcie/portdrv_pci.c
> +++ b/drivers/pci/pcie/portdrv_pci.c
> @@ -106,7 +106,8 @@ static int pcie_portdrv_probe(struct pci_dev *dev,
> if (!pci_is_pcie(dev) ||
> ((pci_pcie_type(dev) != PCI_EXP_TYPE_ROOT_PORT) &&
> (pci_pcie_type(dev) != PCI_EXP_TYPE_UPSTREAM) &&
> - (pci_pcie_type(dev) != PCI_EXP_TYPE_DOWNSTREAM)))
> + (pci_pcie_type(dev) != PCI_EXP_TYPE_DOWNSTREAM) &&
> + (pci_pcie_type(dev) != PCI_EXP_TYPE_RC_EC)))
> return -ENODEV;
>
> status = pcie_port_device_register(dev);
> @@ -195,6 +196,8 @@ static const struct pci_device_id port_pci_ids[] = {
> { PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0) },
> /* subtractive decode PCI-to-PCI bridge, class type is 060401h */
> { PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x01), ~0) },
> + /* handle any Root Complex Event Collector */
> + { PCI_DEVICE_CLASS(((PCI_CLASS_SYSTEM_RCEC << 8) | 0x00), ~0) },
> { },
> };
>
> --
> 2.28.0
>

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