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

[Kishon Vijay Abraham I]

On 11/02/19 3:49 PM, Gustavo Pimentel wrote:
> Hi,
> 
> On 14/01/2019 11:14, 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.
>>
>> Kishon Vijay Abraham I (15):
>>   PCI: endpoint: Add new pci_epc_ops to get EPC features
>>   PCI: dwc: Add ->get_features() callback function in dw_pcie_ep_ops
>>   PCI: designware-plat: Populate ->get_features() dw_pcie_ep_ops
>>   PCI: pci-dra7xx: Populate ->get_features() dw_pcie_ep_ops
>>   PCI: rockchip: Populate ->get_features() dw_pcie_ep_ops
>>   PCI: cadence: Populate ->get_features() cdns_pcie_epc_ops
>>   PCI: endpoint: Add helper to get first unreserved BAR
>>   PCI: endpoint: Fix pci_epf_alloc_space to set correct MEM TYPE flags
>>   PCI: pci-epf-test: Remove setting epf_bar flags in function driver
>>   PCI: pci-epf-test: Do not allocate next BARs memory if current BAR is
>>     64Bit
>>   PCI: pci-epf-test: Use pci_epc_get_features to get EPC features
>>   PCI: cadence: Remove pci_epf_linkup from Cadence EP driver
>>   PCI: rockchip: Remove pci_epf_linkup from Rockchip EP driver
>>   PCI: designware-plat: Remove setting epc->features in Designware plat
>>     EP driver
>>   PCI: endpoint: Remove features member in struct pci_epc
>>
>>  drivers/pci/controller/dwc/pci-dra7xx.c       | 13 +++
>>  .../pci/controller/dwc/pcie-designware-ep.c   | 12 +++
>>  .../pci/controller/dwc/pcie-designware-plat.c | 17 +++-
>>  drivers/pci/controller/dwc/pcie-designware.h  |  1 +
>>  drivers/pci/controller/pcie-cadence-ep.c      | 25 ++---
>>  drivers/pci/controller/pcie-rockchip-ep.c     | 16 +++-
>>  drivers/pci/endpoint/functions/pci-epf-test.c | 93 ++++++++++++-------
>>  drivers/pci/endpoint/pci-epc-core.c           | 53 +++++++++++
>>  drivers/pci/endpoint/pci-epf-core.c           |  4 +-
>>  include/linux/pci-epc.h                       | 31 +++++--
>>  10 files changed, 201 insertions(+), 64 deletions(-)
>>
> 
> Sorry for the delay, I had a problem with my setup.
> 
> Tested-by: Gustavo Pimentel <gustavo.pimentel@xxxxxxxxxxxx>

Thank you Gustavo!

-Kishon