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[v4,0/2] PCI: altera: add support to agilex family

Message ID 20230917170546.2097352-1-sharath.kumar.d.m@intel.com (mailing list archive)
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Series PCI: altera: add support to agilex family | expand

Message

D M, Sharath Kumar Sept. 17, 2023, 5:05 p.m. UTC
From: D M Sharath Kumar <sharath.kumar.d.m@intel.com>

added new callback for
1) read,write to root port configuration registers
2) read,write to endpoint configuration registers
3) root port interrupt handler

agilex and newer platforms need to implemant the callback and generic root
port driver should work ( without much changes ) , legacy platforms (arria
 and startix) implement configuration read,write directly in wrapper
api _altera_pcie_cfg_read/_altera_pcie_cfg_write

changelog v2:
saperated into two patches
1.refactored the driver for easily portability to future Altera FPGA
platforms
2.added support for "Agilex" FPGA

this driver supports PCI RP IP on Agilex FPGA, as these are FPGA its up
to the user to add PCI RP or not ( as per his needs). we are not adding
the device tree as part of this commit. we are expecting the add device
tree changes only if he is adding PCI RP IP in his design

changelog v3:
incorporate review comments from Bjorn Helgaas

changelog v4:
added below callback for root bus
alt_read/write_own_cfg
added below callback for non-root buses
alt_read/write_other_cfg

D M Sharath Kumar (2):
  PCI: altera: refactor driver for supporting new platform
  PCI: altera: add support for agilex family fpga

 drivers/pci/controller/pcie-altera.c | 313 ++++++++++++++++++++++++---
 1 file changed, 280 insertions(+), 33 deletions(-)

Comments

Bjorn Helgaas Oct. 25, 2023, 9:51 p.m. UTC | #1
[+to Joyce, Altera PCIe maintainer]

On Sun, Sep 17, 2023 at 10:35:44PM +0530, sharath.kumar.d.m@intel.com wrote:
> From: D M Sharath Kumar <sharath.kumar.d.m@intel.com>
> 
> added new callback for
> 1) read,write to root port configuration registers
> 2) read,write to endpoint configuration registers
> 3) root port interrupt handler
> 
> agilex and newer platforms need to implemant the callback and generic root
> port driver should work ( without much changes ) , legacy platforms (arria
>  and startix) implement configuration read,write directly in wrapper
> api _altera_pcie_cfg_read/_altera_pcie_cfg_write

Do these patches make the driver work on some new platform?  Has it
been tested?  Please include the name of the new platform.

Saying this "... driver should work (without much changes)" does not
sound like anything has actually been tested on hardware.

> changelog v2:
> saperated into two patches
> 1.refactored the driver for easily portability to future Altera FPGA
> platforms
> 2.added support for "Agilex" FPGA
> 
> this driver supports PCI RP IP on Agilex FPGA, as these are FPGA its up
> to the user to add PCI RP or not ( as per his needs). we are not adding
> the device tree as part of this commit. we are expecting the add device
> tree changes only if he is adding PCI RP IP in his design

Please cc: Joyce on any future postings, since she's listed as the
maintainer for pcie-altera.c.

Joyce, please comment on these.  We don't like to merge things
affecting your file unless you approve.

> changelog v3:
> incorporate review comments from Bjorn Helgaas
> 
> changelog v4:
> added below callback for root bus
> alt_read/write_own_cfg
> added below callback for non-root buses
> alt_read/write_other_cfg
> 
> D M Sharath Kumar (2):
>   PCI: altera: refactor driver for supporting new platform
>   PCI: altera: add support for agilex family fpga
> 
>  drivers/pci/controller/pcie-altera.c | 313 ++++++++++++++++++++++++---
>  1 file changed, 280 insertions(+), 33 deletions(-)
> 
> -- 
> 2.34.1
>