linux-kernel - Re: [PATCH v7 00/14] Add PCIe support to TI's J721E SoC

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Message-ID: <f5811855-976e-ef66-4711-6880ddcbf57b@ti.com>
Date:   Mon, 20 Jul 2020 15:38:42 +0530
From:   Kishon Vijay Abraham I <kishon@...com>
To:     Tom Joseph <tjoseph@...ence.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Arnd Bergmann <arnd@...db.de>
CC:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        <linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v7 00/14] Add PCIe support to TI's J721E SoC

Hi Rob/Lorenzo,

On 7/13/2020 4:31 PM, Kishon Vijay Abraham I wrote:
> TI's J721E SoC uses Cadence PCIe core to implement both RC mode
> and EP mode.

Any comments on this series?

Thanks
Kishon

> 
> The high level features are:
>   *) Supports Legacy, MSI and MSI-X interrupt
>   *) Supports upto GEN4 speed mode
>   *) Supports SR-IOV
>   *) Supports multiple physical function
>   *) Ability to route all transactions via SMMU
> 
> This patch series
>   *) Add support in Cadence PCIe core to be used for TI's J721E SoC
>   *) Add a driver for J721E PCIe wrapper
> 
> v1 of the series can be found @ [1]
> v2 of the series can be found @ [2]
> v3 of the series can be found @ [5]
> v4 of the series can be found @ [6]
> v5 of the series can be found @ [7]
> v6 of the series can be found @ [8]
> 
> Changes from v6:
> 1) Fixed bot found errors running 'make dt_binding_check'
> 
> Changes from v5:
> 1) Added Reviewed-by: for PATCH #6
> 2) Protect writes to PCI_STATUS with spin_lock during raising interrupts
>    in EP mode to reduce the time between read and write of RMW.
> 
> Changes from v4:
> 1) Added Reviewed-by: & Acked-by: tags from RobH
> 2) Removed un-used accessors for pcie-cadence.h and removed having ops
>    for read/write accessors
> 3) Updated cdns,cdns-pcie-host.yaml to remove "mem" from reg
> 
> Changes from v3:
> 1) Changed the order of files in MAINTAINTERS file to fix Joe's comments
> 2) Fixed indentation and added Reviewed-by: Rob Herring <robh@...nel.org>
> 3) Cleaned up computing msix_tbl
> 4) Fixed RobH's comment on J721E driver
> 
> Changes from v2:
> 1) Converting Cadence binding to YAML schema was done as a
>    separate series [3] & [4]. [3] is merged and [4] is
>    pending.
> 2) Included MSI-X support in this series
> 3) Added link down interrupt handling (only error message)
> 4) Rebased to latest 5.7-rc1
> 5) Adapted TI J721E binding to [3] & [4]
> 
> Changes from v1:
> 1) Added DT schemas cdns-pcie-host.yaml, cdns-pcie-ep.yaml and
>    cdns-pcie.yaml for Cadence PCIe core and included it in
>    TI's PCIe DT schema.
> 2) Added cpu_addr_fixup() for Cadence Platform driver.
> 3) Fixed subject/description/renamed functions as commented by
>    Andrew Murray.
> 
> [1] -> http://lore.kernel.org/r/20191209092147.22901-1-kishon@ti.com
> [2] -> http://lore.kernel.org/r/20200106102058.19183-1-kishon@ti.com
> [3] -> http://lore.kernel.org/r/20200305103017.16706-1-kishon@ti.com
> [4] -> http://lore.kernel.org/r/20200417114322.31111-1-kishon@ti.com
> [5] -> http://lore.kernel.org/r/20200417125753.13021-1-kishon@ti.com
> [6] -> http://lore.kernel.org/r/20200506151429.12255-1-kishon@ti.com
> [7] -> http://lore.kernel.org/r/20200522033631.32574-1-kishon@ti.com
> [8] -> http://lore.kernel.org/r/20200708093018.28474-1-kishon@ti.com
> 
> Alan Douglas (1):
>   PCI: cadence: Add MSI-X support to Endpoint driver
> 
> Kishon Vijay Abraham I (13):
>   PCI: cadence: Fix cdns_pcie_{host|ep}_setup() error path
>   linux/kernel.h: Add PTR_ALIGN_DOWN macro
>   PCI: cadence: Convert all r/w accessors to perform only 32-bit
>     accesses
>   PCI: cadence: Add support to start link and verify link status
>   PCI: cadence: Allow pci_host_bridge to have custom pci_ops
>   dt-bindings: PCI: cadence: Remove "mem" from reg binding
>   PCI: cadence: Add new *ops* for CPU addr fixup
>   PCI: cadence: Fix updating Vendor ID and Subsystem Vendor ID register
>   dt-bindings: PCI: Add host mode dt-bindings for TI's J721E SoC
>   dt-bindings: PCI: Add EP mode dt-bindings for TI's J721E SoC
>   PCI: j721e: Add TI J721E PCIe driver
>   misc: pci_endpoint_test: Add J721E in pci_device_id table
>   MAINTAINERS: Add Kishon Vijay Abraham I for TI J721E SoC PCIe
> 
>  .../bindings/pci/cdns,cdns-pcie-host.yaml     |   8 +-
>  .../bindings/pci/ti,j721e-pci-ep.yaml         |  94 ++++
>  .../bindings/pci/ti,j721e-pci-host.yaml       | 113 ++++
>  MAINTAINERS                                   |   4 +-
>  drivers/misc/pci_endpoint_test.c              |   9 +
>  drivers/pci/controller/cadence/Kconfig        |  23 +
>  drivers/pci/controller/cadence/Makefile       |   1 +
>  drivers/pci/controller/cadence/pci-j721e.c    | 493 ++++++++++++++++++
>  .../pci/controller/cadence/pcie-cadence-ep.c  | 129 ++++-
>  .../controller/cadence/pcie-cadence-host.c    |  59 ++-
>  .../controller/cadence/pcie-cadence-plat.c    |  13 +
>  drivers/pci/controller/cadence/pcie-cadence.c |   8 +-
>  drivers/pci/controller/cadence/pcie-cadence.h | 133 ++++-
>  include/linux/kernel.h                        |   1 +
>  14 files changed, 1035 insertions(+), 53 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/pci/ti,j721e-pci-ep.yaml
>  create mode 100644 Documentation/devicetree/bindings/pci/ti,j721e-pci-host.yaml
>  create mode 100644 drivers/pci/controller/cadence/pci-j721e.c
>