[PATCH RESEND v4 00/15] PCI: dwc: Add hw version and dma-ranges support

Serge Semin
2022-06-24T14:39:59Z

This patchset is a second one in the series created in the framework of
my Baikal-T1 PCIe/eDMA-related work:

[1: In-progress v5] PCI: dwc: Various fixes and cleanups
Link: https://lore.kernel.org/linux-pci/20220624143428.8334-1-Sergey.Semin@baikalelectronics.ru/
[2: In-progress v4] PCI: dwc: Add hw version and dma-ranges support
Link: ---you are looking at it---
[3: In-progress v3] PCI: dwc: Add extended YAML-schema and Baikal-T1 support
Link: https://lore.kernel.org/linux-pci/20220610085706.15741-1-Sergey.Semin@baikalelectronics.ru/
[4: In-progress v3] dmaengine: dw-edma: Add RP/EP local DMA support
Link: https://lore.kernel.org/linux-pci/20220610091459.17612-1-Sergey.Semin@baikalelectronics.ru

Note it is very recommended to merge the patchsets in the same order as
they are listed in the set above in order to have them applied smoothly.
Nothing prevents them from being reviewed synchronously though.

Originally the patches submitted in this patchset were a part of the series:
Link: https://lore.kernel.org/linux-pci/20220503214638.1895-1-Sergey.Semin@baikalelectronics.ru/
but due to the reviewers requests the series was expanded to about 30
patches which made it too bulky for a comfortable review. So I decided to
split it up into two patchsets: 2. and 3. in the table above.

Regarding the series content. This patchset is about adding new features
to the DW PCIe core, Root Port and Endpoint drivers. First we suggest to
add a more verbose link-up log message. Really printing link generation
and width would be much more informative than just "link up". Then a
series of IP-core version-related patches go, like using a native FourCC
version representation, adding the IP-core auto-detection, adding a better
structured IP-core version/type interface and finally dropping manual
IP-core version setups from the platforms which are supposed to have it
auto-detected. After that the platform-specific host de-initialization
method is introduced. It's unused in the framework of this patchset but
will be utilized in the next one (see the table above). A series of iATU
optimizations, cleanups and new features goes afterwards. In particular we
suggest to drop some redundant enumerations, add iATU regions size
detection procedure and then use the regions parameters to verify the
requested by the platform iATU ranges/dma-ranges settings. After that the
dma-ranges property support is added for the DW PCIe Host controllers.

Link: https://lore.kernel.org/linux-pci/20220324013734.18234-1-Sergey.Semin@baikalelectronics.ru/
Changelog v2:
- Test the error condition first and return straight away if it comes true
in the link up waiting and link state logging method (@Joe).
- Move the dw_pcie_region_type enumeration removal patch to being applied
before the IB/OB iATU windows setup simplification patch (@Rob).
- Move the iATU region selection procedure into a helper function (@Rob).
- Rebase from kernel v5.17 onto v5.18-rc3 since the later kernel has
already DT bindings converted. (@Rob)
- Simplify the iATU region selection procedure by recalculating the base
address only if the space is unrolled. The iATU viewport base address
will be saved in the pci->atu_base field.
- Move the IP-core version detection procedure call from
dw_pcie_ep_init_complete() to dw_pcie_ep_init().
- Add a new patch: "PCI: dwc: Detect iATU settings after getting
"addr_space" resource."

Link: https://lore.kernel.org/linux-pci/20220503225104.12108-1-Sergey.Semin@baikalelectronics.ru
Changelog v3:
- Fix pcie-tegra194-acpi.c driver to using the new macros names.
(@Manivannan)
- Drop in/outbound iATU window size alignment constraint. (@Manivannan)
- Detach this series of patches into a dedicated patchset.
- Rebase onto kernel v5.18.

Link: https://lore.kernel.org/linux-pci/20220610084444.14549-1-Sergey.Semin@baikalelectronics.ru/
Changelog v4:
- Just resend.
- Rebase onto the kernel v5.19-rcX.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Pavel Parkhomenko <Pavel.Parkhomenko@baikalelectronics.ru>
Cc: "Krzysztof Wilczyński" <kw@linux.com>
Cc: Frank Li <Frank.Li@nxp.com>
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: linux-pci@vger.kernel.org
Cc: devicetree@vger.kernel.org
Cc: linux-kernel@vger.kernel.org

Serge Semin (15):
PCI: dwc: Add more verbose link-up message
PCI: dwc: Detect iATU settings after getting "addr_space" resource
PCI: dwc: Convert to using native IP-core versions representation
PCI: dwc: Add IP-core version detection procedure
PCI: dwc: Introduce Synopsys IP-core versions/types interface
PCI: intel-gw: Drop manual DW PCIe controller version setup
PCI: tegra194: Drop manual DW PCIe controller version setup
PCI: dwc: Add host de-initialization callback
PCI: dwc: Drop inbound iATU types enumeration - dw_pcie_as_type
PCI: dwc: Drop iATU regions enumeration - dw_pcie_region_type
PCI: dwc: Simplify in/outbound iATU setup methods
PCI: dwc: Add iATU regions size detection procedure
PCI: dwc: Verify in/out regions against iATU constraints
PCI: dwc: Check iATU in/outbound ranges setup methods status
PCI: dwc: Introduce dma-ranges property support for RC-host

drivers/pci/controller/dwc/pci-keystone.c | 12 +-
.../pci/controller/dwc/pcie-designware-ep.c | 40 +-
.../pci/controller/dwc/pcie-designware-host.c | 202 +++++---
drivers/pci/controller/dwc/pcie-designware.c | 461 ++++++++----------
drivers/pci/controller/dwc/pcie-designware.h | 123 ++---
drivers/pci/controller/dwc/pcie-intel-gw.c | 22 +-
.../pci/controller/dwc/pcie-tegra194-acpi.c | 7 +-
drivers/pci/controller/dwc/pcie-tegra194.c | 1 -
8 files changed, 461 insertions(+), 407 deletions(-)

--
2.35.1