Re: [PATCH v2 00/15] PCI: endpoint: Cleanup EPC features

[Shawn Lin]

On 2019/1/14 19:14, Kishon Vijay Abraham I wrote:
> Hi Lorenzo,
>
> The Endpoint controller driver uses features member in 'struct pci_epc'
> to advertise the list of supported features to the endpoint function
> driver.
>
> There are a few shortcomings with this approach.
>    *) Certain endpoint controllers support fixed size BAR (e.g. TI's
>       AM654 uses Designware configuration with fixed size BAR). The
>       size of each BARs cannot be passed to the endpoint function
>       driver.
>    *) Too many macros for handling EPC features.
>       (EPC_FEATURE_NO_LINKUP_NOTIFIER, EPC_FEATURE_BAR_MASK,
>        EPC_FEATURE_MSIX_AVAILABLE, EPC_FEATURE_SET_BAR,
>        EPC_FEATURE_GET_BAR)
>    *) Endpoint controllers are directly modifying struct pci_epc
>       members. (I have plans to move struct pci_epc to
>       drivers/pci/endpoint so that pci_epc members are referenced
>       only by endpoint core).
>
> To overcome the above shortcomings, introduced pci_epc_get_features()
> API, pci_epc_features structure and a ->get_features() callback.
>
> Also added a patch to set BAR flags in pci_epf_alloc_space and
> remove it from pci-epf-test function driver.
>
> Changes from v1:
> *) Fixed helper function to return '0' (or BAR_0) for any incorrect
>     values in reserved BAR.
> *) Do not set_bar or alloc space for BARs if the BARs are reserved
> *) Fix incorrect check of epc_features in pci_epf_test_bind
>
> Tested on TI's DRA7xx platform and AM654 platform. Support for PCIe
> in AM654 platform will be posted shortly.


----8<-----

>   drivers/pci/controller/pcie-rockchip-ep.c     | 16 +++-

Acked-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>