Re: [PATCH v2 00/15] PCI: endpoint: Cleanup EPC features
From: Kishon Vijay Abraham I
Date: Mon Feb 11 2019 - 07:39:02 EST
On 11/02/19 3:49 PM, Gustavo Pimentel wrote:
> 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
>> 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
>> *) Too many macros for handling EPC features.
>> (EPC_FEATURE_NO_LINKUP_NOTIFIER, EPC_FEATURE_BAR_MASK,
>> EPC_FEATURE_MSIX_AVAILABLE, EPC_FEATURE_SET_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
>> 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!