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From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
To: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Heiko Stuebner <heiko@sntech.de>,
	Gustavo Pimentel <gustavo.pimentel@synopsys.com>,
	Shawn Lin <shawn.lin@rock-chips.com>,
	linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-rockchip@lists.infradead.org,
	Alan Douglas <adouglas@cadence.com>,
	Jingoo Han <jingoohan1@gmail.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 00/15] PCI: endpoint: Cleanup EPC features
Date: Fri, 15 Feb 2019 10:09:15 +0000
Message-ID: <20190215100915.GA26061@e107981-ln.cambridge.arm.com> (raw)
In-Reply-To: <20190114111513.21618-1-kishon@ti.com>

On Mon, Jan 14, 2019 at 04:44:58PM +0530, 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(-)

Applied to pci/endpoint for v5.1, thanks !

Lorenzo

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      parent reply index

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-14 11:14 Kishon Vijay Abraham I
2019-01-14 11:14 ` [PATCH v2 01/15] PCI: endpoint: Add new pci_epc_ops to get " Kishon Vijay Abraham I
2019-01-14 11:15 ` [PATCH v2 02/15] PCI: dwc: Add ->get_features() callback function in dw_pcie_ep_ops Kishon Vijay Abraham I
2019-01-14 11:15 ` [PATCH v2 03/15] PCI: designware-plat: Populate ->get_features() dw_pcie_ep_ops Kishon Vijay Abraham I
2019-01-14 11:15 ` [PATCH v2 04/15] PCI: pci-dra7xx: " Kishon Vijay Abraham I
2019-01-14 11:15 ` [PATCH v2 05/15] PCI: rockchip: " Kishon Vijay Abraham I
2019-01-14 11:15 ` [PATCH v2 06/15] PCI: cadence: Populate ->get_features() cdns_pcie_epc_ops Kishon Vijay Abraham I
2019-01-14 11:15 ` [PATCH v2 07/15] PCI: endpoint: Add helper to get first unreserved BAR Kishon Vijay Abraham I
2019-01-14 11:15 ` [PATCH v2 08/15] PCI: endpoint: Fix pci_epf_alloc_space to set correct MEM TYPE flags Kishon Vijay Abraham I
2019-02-11 17:37   ` Lorenzo Pieralisi
2019-02-13 13:47     ` Kishon Vijay Abraham I
2019-02-14 16:29       ` Lorenzo Pieralisi
2019-02-15  6:19         ` Kishon Vijay Abraham I
2019-02-15  9:52           ` Lorenzo Pieralisi
2019-01-14 11:15 ` [PATCH v2 09/15] PCI: pci-epf-test: Remove setting epf_bar flags in function driver Kishon Vijay Abraham I
2019-01-14 11:15 ` [PATCH v2 10/15] PCI: pci-epf-test: Do not allocate next BARs memory if current BAR is 64Bit Kishon Vijay Abraham I
2019-01-14 11:15 ` [PATCH v2 11/15] PCI: pci-epf-test: Use pci_epc_get_features to get EPC features Kishon Vijay Abraham I
2019-01-14 11:15 ` [PATCH v2 12/15] PCI: cadence: Remove pci_epf_linkup from Cadence EP driver Kishon Vijay Abraham I
2019-01-14 11:15 ` [PATCH v2 13/15] PCI: rockchip: Remove pci_epf_linkup from Rockchip " Kishon Vijay Abraham I
2019-01-14 11:15 ` [PATCH v2 14/15] PCI: designware-plat: Remove setting epc->features in Designware plat " Kishon Vijay Abraham I
2019-01-14 11:15 ` [PATCH v2 15/15] PCI: endpoint: Remove features member in struct pci_epc Kishon Vijay Abraham I
2019-01-15  1:52 ` [PATCH v2 00/15] PCI: endpoint: Cleanup EPC features Shawn Lin
2019-02-11 10:19 ` Gustavo Pimentel
2019-02-11 12:37   ` Kishon Vijay Abraham I
2019-02-15 10:09 ` Lorenzo Pieralisi [this message]

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