linux-kernel - [PATCH 00/10] Add Tegra194 PCIe support

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Message-ID: <1553613207-3988-1-git-send-email-vidyas@nvidia.com>
Date:   Tue, 26 Mar 2019 20:43:17 +0530
From:   Vidya Sagar <vidyas@...dia.com>
To:     <bhelgaas@...gle.com>, <robh+dt@...nel.org>,
        <mark.rutland@....com>, <thierry.reding@...il.com>,
        <jonathanh@...dia.com>, <kishon@...com>, <catalin.marinas@....com>,
        <will.deacon@....com>, <lorenzo.pieralisi@....com>,
        <jingoohan1@...il.com>, <gustavo.pimentel@...opsys.com>,
        <mperttunen@...dia.com>, <vidyas@...dia.com>, <tiwai@...e.de>,
        <spujar@...dia.com>, <skomatineni@...dia.com>,
        <liviu.dudau@....com>, <krzk@...nel.org>, <heiko@...ech.de>,
        <horms+renesas@...ge.net.au>, <olof@...om.net>,
        <maxime.ripard@...tlin.com>, <andy.gross@...aro.org>,
        <bjorn.andersson@...aro.org>, <jagan@...rulasolutions.com>,
        <enric.balletbo@...labora.com>, <ezequiel@...labora.com>,
        <stefan.wahren@...e.com>, <marc.w.gonzalez@...e.fr>,
        <l.stach@...gutronix.de>, <tpiepho@...inj.com>,
        <hayashi.kunihiko@...ionext.com>, <yue.wang@...ogic.com>,
        <shawn.lin@...k-chips.com>, <xiaowei.bao@....com>
CC:     <linux-pci@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <kthota@...dia.com>,
        <mmaddireddy@...dia.com>
Subject: [PATCH 00/10] Add Tegra194 PCIe support

Tegra194 has six PCIe controllers based on Synopsys DesignWare core.
There are two Universal PHY (UPHY) blocks with each supporting 12(HSIO:
Hisg Speed IO) and 8(NVHS: NVIDIA High Speed) lanes respectively.
Controllers:0~4 use UPHY lanes from HSIO brick whereas Controller:5 uses
UPHY lanes from NVHS brick. Lane mapping in HSIO UPHY brick to each PCIe
controller (0~4) is controlled in XBAR module by BPMP-FW. Since PCIe
core has PIPE interface, a glue module called PIPE-to-UPHY (P2U) is used
to connect each UPHY lane (applicable to both HSIO and NVHS UPHY bricks)
to PCIe controller
This patch series
- Adds support for P2U PHY driver
- Adds support for PCIe host controller
- Adds device tree nodes each PCIe controllers
- Enables nodes applicable to p2972-0000 platform
- Adds helper APIs in Designware core driver to get capability regs offset
- Adds defines for new feature registers of PCIe spec revision 4
- Makes changes in DesignWare core driver to get Tegra194 PCIe working

Testing done on P2972-0000 platform
- Able to get PCIe link up with on-board Marvel eSATA controller
- Able to get PCIe link up with NVMe cards connected to M.2 Key-M slot
- Able to do data transfers with both SATA drives and NVMe cards

Note
- Enabling x8 slot on P2972-0000 platform requires pinmux driver for Tegra194.
  It is being worked on currently and hence Controller:5 (i.e. x8 slot) is
  disabled in this patch series. A future patch series would enable this.
Vidya Sagar (10):
  PCI: save pci_bus pointer in pcie_port structure
  PCI: perform dbi regs write lock towards the end
  PCI: dwc: Move config space capability search API
  PCI: Add #defines for PCIe spec r4.0 features
  dt-bindings: PCI: tegra: Add device tree support for T194
  arm64: tegra: Add P2U and PCIe controller nodes to Tegra194 DT
  arm64: tegra: Enable PCIe slots in P2972-0000 board
  phy: tegra: Add PCIe PIPE2UPHY support
  PCI: tegra: Add Tegra194 PCIe support
  arm64: Add Tegra194 PCIe driver to defconfig

 .../bindings/pci/nvidia,tegra194-pcie.txt          |  209 +++
 .../devicetree/bindings/phy/phy-tegra194-p2u.txt   |   34 +
 arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi     |    2 +-
 arch/arm64/boot/dts/nvidia/tegra194-p2972-0000.dts |   50 +
 arch/arm64/boot/dts/nvidia/tegra194.dtsi           |  473 +++++
 arch/arm64/configs/defconfig                       |    1 +
 drivers/pci/controller/dwc/Kconfig                 |   10 +
 drivers/pci/controller/dwc/Makefile                |    1 +
 drivers/pci/controller/dwc/pcie-designware-ep.c    |   37 +-
 drivers/pci/controller/dwc/pcie-designware-host.c  |    4 +-
 drivers/pci/controller/dwc/pcie-designware.c       |   73 +
 drivers/pci/controller/dwc/pcie-designware.h       |    4 +
 drivers/pci/controller/dwc/pcie-tegra194.c         | 1862 ++++++++++++++++++++
 drivers/phy/tegra/Kconfig                          |    7 +
 drivers/phy/tegra/Makefile                         |    1 +
 drivers/phy/tegra/pcie-p2u-tegra194.c              |  138 ++
 include/uapi/linux/pci_regs.h                      |   22 +-
 17 files changed, 2888 insertions(+), 40 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/pci/nvidia,tegra194-pcie.txt
 create mode 100644 Documentation/devicetree/bindings/phy/phy-tegra194-p2u.txt
 create mode 100644 drivers/pci/controller/dwc/pcie-tegra194.c
 create mode 100644 drivers/phy/tegra/pcie-p2u-tegra194.c

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2.7.4