[PATCH V4 00/16] Add Tegra194 PCIe support

Vidya Sagar
2019-04-23T08:27:48Z

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.
- This series is based on top of the following series
Jisheng's patches to add support to .remove() in Designware sub-system
https://patchwork.kernel.org/project/linux-pci/list/?series=98559
(Jisheng's patches are now accepted and applied for v5.2)
My patches made on top of Jisheng's patches to export various symbols
https://patchwork.kernel.org/project/linux-pci/list/?series=101259

Changes since [v3]:
* Rebased on top of linux-next top of the tree
* Addressed Gustavo's comments and added his Ack for some of the changes.

Changes since [v2]:
* Addressed review comments from Thierry

Changes since [v1]:
* Addressed review comments from Bjorn, Thierry, Jonathan, Rob & Kishon
* Added more patches in v2 series

Vidya Sagar (16):
PCI: Add #defines for some of PCIe spec r4.0 features
PCI/PME: Export pcie_pme_disable_msi() & pcie_pme_no_msi() APIs
PCI: Export pcie_bus_config symbol
PCI: dwc: Perform dbi regs write lock towards the end
PCI: dwc: Move config space capability search API
PCI: dwc: Add ext config space capability search API
dt-bindings: PCI: designware: Add binding for CDM register check
PCI: dwc: Add support to enable CDM register check
Documentation/devicetree: Add PCIe supports-clkreq property
dt-bindings: PCI: tegra: Add device tree support for T194
dt-bindings: PHY: P2U: Add Tegra 194 P2U block
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/designware-pcie.txt | 5 +
.../bindings/pci/nvidia,tegra194-pcie.txt | 187 ++
Documentation/devicetree/bindings/pci/pci.txt | 5 +
.../bindings/phy/phy-tegra194-p2u.txt | 28 +
.../arm64/boot/dts/nvidia/tegra194-p2888.dtsi | 2 +-
.../boot/dts/nvidia/tegra194-p2972-0000.dts | 41 +
arch/arm64/boot/dts/nvidia/tegra194.dtsi | 449 +++++
arch/arm64/configs/defconfig | 1 +
drivers/pci/controller/dwc/Kconfig | 11 +
drivers/pci/controller/dwc/Makefile | 1 +
.../pci/controller/dwc/pcie-designware-host.c | 3 -
drivers/pci/controller/dwc/pcie-designware.c | 81 +
drivers/pci/controller/dwc/pcie-designware.h | 12 +
drivers/pci/controller/dwc/pcie-tegra194.c | 1760 +++++++++++++++++
drivers/pci/pci.c | 1 +
drivers/pci/pcie/pme.c | 14 +-
drivers/pci/pcie/portdrv.h | 16 +-
drivers/phy/tegra/Kconfig | 7 +
drivers/phy/tegra/Makefile | 1 +
drivers/phy/tegra/pcie-p2u-tegra194.c | 120 ++
include/uapi/linux/pci_regs.h | 22 +-
21 files changed, 2748 insertions(+), 19 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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2.17.1