From: "Gupta, Nipun" <Nipun.Gupta@amd.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"krzysztof.kozlowski+dt@linaro.org"
<krzysztof.kozlowski+dt@linaro.org>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"rafael@kernel.org" <rafael@kernel.org>,
"eric.auger@redhat.com" <eric.auger@redhat.com>,
"alex.williamson@redhat.com" <alex.williamson@redhat.com>,
"cohuck@redhat.com" <cohuck@redhat.com>,
"Gupta, Puneet (DCG-ENG)" <puneet.gupta@amd.com>,
"song.bao.hua@hisilicon.com" <song.bao.hua@hisilicon.com>,
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Cc: "okaya@kernel.org" <okaya@kernel.org>,
"Anand, Harpreet" <harpreet.anand@amd.com>,
"Agarwal, Nikhil" <nikhil.agarwal@amd.com>,
"Simek, Michal" <michal.simek@amd.com>,
"git (AMD-Xilinx)" <git@amd.com>
Subject: RE: [RFC PATCH v2 1/6] Documentation: DT: Add entry for CDX controller
Date: Mon, 5 Sep 2022 14:05:35 +0000 [thread overview]
Message-ID: <DM6PR12MB308211F26296F3B816F3F005E87F9@DM6PR12MB3082.namprd12.prod.outlook.com> (raw)
In-Reply-To: <93f080cd-e586-112f-bac8-fa2a7f69efb3@linaro.org>
[AMD Official Use Only - General]
> -----Original Message-----
> From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> Sent: Thursday, August 18, 2022 3:24 PM
> To: Gupta, Nipun <Nipun.Gupta@amd.com>; robh+dt@kernel.org;
> krzysztof.kozlowski+dt@linaro.org; gregkh@linuxfoundation.org;
> rafael@kernel.org; eric.auger@redhat.com; alex.williamson@redhat.com;
> cohuck@redhat.com; Gupta, Puneet (DCG-ENG) <puneet.gupta@amd.com>;
> song.bao.hua@hisilicon.com; mchehab+huawei@kernel.org; maz@kernel.org;
> f.fainelli@gmail.com; jeffrey.l.hugo@gmail.com; saravanak@google.com;
> Michael.Srba@seznam.cz; mani@kernel.org; yishaih@nvidia.com;
> jgg@ziepe.ca; linux-kernel@vger.kernel.org; devicetree@vger.kernel.org;
> kvm@vger.kernel.org
> Cc: okaya@kernel.org; Anand, Harpreet <harpreet.anand@amd.com>; Agarwal,
> Nikhil <nikhil.agarwal@amd.com>; Simek, Michal <michal.simek@amd.com>;
> git (AMD-Xilinx) <git@amd.com>
> Subject: Re: [RFC PATCH v2 1/6] Documentation: DT: Add entry for CDX
> controller
>
> [CAUTION: External Email]
>
> On 17/08/2022 18:05, Nipun Gupta wrote:
> > This patch adds a devicetree binding documentation for CDX
> > controller.
> >
> Does not look like you tested the bindings. Please run `make
> dt_binding_check` (see
> Documentation/devicetree/bindings/writing-schema.rst for instructions).
>
Thanks for the detailed review. Will fix the issues observed in v3.
> > CDX bus controller dynamically detects CDX bus and the
> > devices on these bus using CDX firmware.
> >
> > Signed-off-by: Nipun Gupta <mailto:nipun.gupta@amd.com>
>
> Use subject perfixes matching the subsystem (git log --oneline -- ...).
Agree, will update.
>
> > ---
> > .../devicetree/bindings/bus/xlnx,cdx.yaml | 108 ++++++++++++++++++
> > MAINTAINERS | 6 +
> > 2 files changed, 114 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/bus/xlnx,cdx.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/bus/xlnx,cdx.yaml
> b/Documentation/devicetree/bindings/bus/xlnx,cdx.yaml
> > new file mode 100644
> > index 000000000000..4247a1cff3c1
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/bus/xlnx,cdx.yaml
> > @@ -0,0 +1,108 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id:
> https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fmisc%2Fxlnx%2Ccdx.yaml%23&data=05%7C01%7Cnipun.gupta%40amd.com%7C36ea349b1b464c0de27208da80ffa39e%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637964132708706641%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=2cB6xGI3%2Brd%2BKXvvoZ7bDQvIAjIc7djKatDrJcuLJIg%3D&reserved=0
> > +$schema:
> https://nam11.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fmeta-schemas%2Fcore.yaml%23&data=05%7C01%7Cnipun.gupta%40amd.com%7C36ea349b1b464c0de27208da80ffa39e%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637964132708706641%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=DfEspCt84z77me2ShufHrL%2FK1X87p65XnbmVVr2xDrM%3D&reserved=0
> > +
> > +title: Xilinx CDX bus controller
> > +
> > +description: |
> > + CDX bus controller for Xilinx devices is implemented to
>
> You need to describe what is this CDX bus. Google says nothing...
We will be adding more Arch related details in the cover letter patch to
describe the CDX bus.
>
> > + dynamically detect CDX bus and devices on these bus using the
> > + firmware. The CDX bus manages multiple FPGA based hardware
> > + devices, which can support network, crypto or any other specialized
> > + type of device. These FPGA based devices can be added/modified
> > + dynamically on run-time.
> > +
> > + All devices on the CDX bus will have a unique streamid (for IOMMU)
> > + and a unique device ID (for MSI) corresponding to a requestor ID
> > + (one to one associated with the device). The streamid and deviceid
> > + are used to configure SMMU and GIC-ITS respectively.
> > +
> > + iommu-map property is used to define the set of stream ids
> > + corresponding to each device and the associated IOMMU.
> > +
> > + For generic IOMMU bindings, see:
> > + Documentation/devicetree/bindings/iommu/iommu.txt.
>
> Drop sentence.
Agree
>
> > +
> > + For arm-smmu binding, see:
> > + Documentation/devicetree/bindings/iommu/arm,smmu.yaml.
>
> Drop sentence.
Agree
>
> > +
> > + The MSI writes are accompanied by sideband data (Device ID).
> > + The msi-map property is used to associate the devices with the
> > + device ID as well as the associated ITS controller.
> > +
> > + For generic MSI bindings, see:
> > + Documentation/devicetree/bindings/interrupt-controller/msi.txt.
>
> Drop sentence.
Agree
>
> > +
> > + For GICv3 and GIC ITS bindings, see:
> > + Documentation/devicetree/bindings/interrupt-controller/arm,gic-v3.yaml.
>
> Drop sentence.
Agree
>
> > +
> > +maintainers:
> > + - Nipun Gupta <mailto:nipun.gupta@amd.com>
> > + - Nikhil Agarwal <mailto:nikhil.agarwal@amd.com>
> > +
> > +properties:
> > + compatible:
> > + const: "xlnx,cdxbus-controller-1.0"
>
> No quotes.
Agree. Will update in v3
>
> > +
> > + reg:
> > + description: |
> > + specifies the CDX firmware region shared memory accessible by the
> > + ARM cores.
>
> You need to describe the items instead (e.g. maxItems:1).
Will be updating in v3
>
> > +
> > + iommu-map:
> > + description: |
> > + Maps device Requestor ID to a stream ID and associated IOMMU. The
> > + property is an arbitrary number of tuples of
> > + (rid-base,iommu,streamid-base,length).
> > +
> > + Any Requestor ID i in the interval [rid-base, rid-base + length) is
> > + associated with the listed IOMMU, with the iommu-specifier
> > + (i - streamid-base + streamid-base).
>
> You need type and constraints.
Agree.
>
> > +
> > + msi-map:
> > + description:
> > + Maps an Requestor ID to a GIC ITS and associated msi-specifier
> > + data (device ID). The property is an arbitrary number of tuples of
> > + (rid-base,gic-its,deviceid-base,length).
> > +
> > + Any Requestor ID in the interval [rid-base, rid-base + length) is
> > + associated with the listed GIC ITS, with the msi-specifier
> > + (i - rid-base + deviceid-base).
>
> You need type and constraints.
>
>
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - iommu-map
> > + - msi-map
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > + - |
> > + smmu@ec000000 {
> > + compatible = "arm,smmu-v3";
> > + #iommu-cells = <1>;
> > + ...
>
> ???
Will be fixed in v3
>
> > +
> > + gic@e2000000 {
> > + compatible = "arm,gic-v3";
> > + interrupt-controller;
> > + ...
> > + its: gic-its@e2040000 {
> > + compatible = "arm,gic-v3-its";
> > + msi-controller;
> > + ...
> > + }
> > + };
> > +
> > + cdxbus: cdxbus@@4000000 {
>
> Node names should be generic, so "cdx"
Would be using bus: cdxbus@4000000.
Kindly correct me if this does not seem to be correct.
Thanks,
Nipun
>
> https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdevicetree-specification.readthedocs.io%2Fen%2Flatest%2Fchapter2-devicetree-basics.html%23generic-names-recommendation&data=05%7C01%7Cnipun.gupta%40amd.com%7C36ea349b1b464c0de27208da80ffa39e%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637964132708706641%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=QN8hk1CEOSmNSV5f0Z2uL4hatFrc1xYC5JBbptcCISA%3D&reserved=0
>
> Drop the label.
>
>
> > + compatible = "xlnx,cdxbus-controller-1.0";
> > + reg = <0x00000000 0x04000000 0 0x1000>;
> > + /* define map for RIDs 250-259 */
> > + iommu-map = <250 &smmu 250 10>;
> > + /* define msi map for RIDs 250-259 */
> > + msi-map = <250 &its 250 10>;
> > + };
> Best regards,
> Krzysztof
next prev parent reply other threads:[~2022-09-05 14:05 UTC|newest]
Thread overview: 113+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-03 12:26 [RFC PATCH 0/2] add support for CDX bus MSI domain Nipun Gupta
2022-08-03 12:26 ` [RFC PATCH 1/2] irqchip: cdx-bus: add cdx-MSI domain with gic-its domain as parent Nipun Gupta
2022-08-03 12:33 ` Greg KH
2022-08-03 12:37 ` Gupta, Nipun
2022-08-04 8:49 ` Marc Zyngier
2022-08-04 9:18 ` Gupta, Nipun
[not found] ` <87mtckwaxa.wl-maz@kernel.org>
2022-08-04 12:11 ` Gupta, Nipun
2022-08-03 12:26 ` [RFC PATCH 2/2] driver core: add compatible string in sysfs for platform devices Nipun Gupta
2022-08-03 12:31 ` Greg KH
2022-08-03 12:46 ` Gupta, Nipun
2022-08-03 14:16 ` [RFC PATCH 0/2] add support for CDX bus MSI domain Robin Murphy
2022-08-04 4:23 ` Gupta, Nipun
2022-08-17 16:00 ` Jason Gunthorpe
2022-08-17 15:05 ` [RFC PATCH v2 0/6] add support for CDX bus controller Nipun Gupta
2022-08-17 15:05 ` [RFC PATCH v2 1/6] Documentation: DT: Add entry for CDX controller Nipun Gupta
2022-08-18 9:54 ` Krzysztof Kozlowski
2022-08-18 9:59 ` Krzysztof Kozlowski
2022-09-05 14:05 ` Gupta, Nipun [this message]
2022-09-06 6:55 ` Krzysztof Kozlowski
2022-09-06 7:03 ` Gupta, Nipun
2022-09-06 7:20 ` Krzysztof Kozlowski
2022-08-17 15:05 ` [RFC PATCH v2 2/6] bus/cdx: add the cdx bus driver Nipun Gupta
2022-08-17 15:32 ` Greg KH
2022-08-17 15:46 ` Marc Zyngier
2022-08-22 13:21 ` Gupta, Nipun
2022-08-22 13:29 ` Greg KH
2022-08-24 8:50 ` Gupta, Nipun
2022-08-24 12:11 ` Greg KH
2022-08-24 23:31 ` Jason Gunthorpe
2022-08-25 18:38 ` Saravana Kannan
2022-08-25 19:57 ` Robin Murphy
2022-08-26 0:08 ` Jason Gunthorpe
2022-08-29 4:49 ` Gupta, Nipun
2022-08-29 4:49 ` Gupta, Nipun
2022-08-29 15:31 ` Jason Gunthorpe
2022-08-30 7:06 ` Gupta, Nipun
2022-08-30 11:25 ` Robin Murphy
2022-08-30 13:01 ` Jason Gunthorpe
2022-08-30 13:12 ` Gupta, Nipun
2022-08-17 15:05 ` [RFC PATCH v2 3/6] bus/cdx: add cdx-MSI domain with gic-its domain as parent Nipun Gupta
2022-08-17 15:33 ` Greg KH
2022-08-17 15:05 ` [RFC PATCH v2 4/6] bus/cdx: add rescan and reset support Nipun Gupta
2022-08-17 15:05 ` [RFC PATCH v2 5/6] vfio: platform: reset: add reset for cdx devices Nipun Gupta
2022-08-17 15:05 ` [RFC PATCH v2 6/6] driver core: add compatible string in sysfs for platform devices Nipun Gupta
2022-08-17 15:30 ` Greg KH
2022-08-17 16:04 ` Saravana Kannan
2022-09-05 13:54 ` Gupta, Nipun
2022-09-06 13:47 ` [RFC PATCH v3 0/7] add support for CDX bus Nipun Gupta
2022-09-06 13:47 ` [RFC PATCH v3 1/7] dt-bindings: bus: add CDX bus device tree bindings Nipun Gupta
2022-09-06 17:46 ` Rob Herring
2022-09-07 3:13 ` Gupta, Nipun
2022-09-08 10:51 ` Krzysztof Kozlowski
2022-09-06 13:47 ` [RFC PATCH v3 2/7] bus/cdx: add the cdx bus driver Nipun Gupta
2022-09-07 0:32 ` Saravana Kannan
2022-09-07 3:21 ` Gupta, Nipun
2022-09-07 18:06 ` Saravana Kannan
2022-09-07 12:32 ` Greg KH
2022-09-08 13:29 ` Gupta, Nipun
2022-09-06 13:47 ` [RFC PATCH v3 3/7] iommu/arm-smmu-v3: support ops registration for CDX bus Nipun Gupta
2022-09-07 0:10 ` Saravana Kannan
2022-09-07 3:17 ` Gupta, Nipun
2022-09-07 8:27 ` Robin Murphy
2022-09-07 18:24 ` Saravana Kannan
2022-09-07 20:40 ` Robin Murphy
2022-09-08 0:14 ` Saravana Kannan
2022-09-06 13:47 ` [RFC PATCH v3 4/7] bus/cdx: add cdx-MSI domain with gic-its domain as parent Nipun Gupta
2022-09-06 17:19 ` Jason Gunthorpe
2022-09-07 11:17 ` Marc Zyngier
2022-09-07 11:33 ` Robin Murphy
2022-09-07 12:14 ` Marc Zyngier
2022-09-07 11:35 ` Radovanovic, Aleksandar
[not found] ` <87illzuzyw.wl-maz@kernel.org>
2022-09-07 13:18 ` Radovanovic, Aleksandar
[not found] ` <87edwmuw4f.wl-maz@kernel.org>
2022-09-08 9:51 ` Radovanovic, Aleksandar
2022-09-08 11:49 ` Robin Murphy
2022-09-07 13:18 ` Marc Zyngier
2022-09-08 14:13 ` Gupta, Nipun
[not found] ` <87a67aueg7.wl-maz@kernel.org>
2022-09-09 6:32 ` Gupta, Nipun
2022-10-12 10:04 ` Gupta, Nipun
2022-10-12 10:34 ` Radovanovic, Aleksandar
2022-10-12 13:02 ` Jason Gunthorpe
2022-10-12 13:37 ` Radovanovic, Aleksandar
2022-10-12 14:38 ` Jason Gunthorpe
2022-10-12 15:09 ` Radovanovic, Aleksandar
2022-10-13 12:43 ` Jason Gunthorpe
2022-10-14 11:18 ` Radovanovic, Aleksandar
2022-10-14 11:54 ` gregkh
2022-10-14 12:13 ` Radovanovic, Aleksandar
2022-10-14 13:46 ` gregkh
2022-10-14 13:58 ` Jason Gunthorpe
2022-09-06 13:47 ` [RFC PATCH v3 5/7] bus/cdx: add bus and device attributes Nipun Gupta
2022-09-06 13:48 ` [RFC PATCH v3 6/7] vfio/cdx: add support for CDX bus Nipun Gupta
2022-09-06 17:20 ` Jason Gunthorpe
2022-09-06 17:23 ` Gupta, Nipun
2022-09-06 13:48 ` [RFC PATCH v3 7/7] vfio/cdx: add interrupt support Nipun Gupta
2022-10-14 4:40 ` [RFC PATCH v4 0/8] add support for CDX bus Nipun Gupta
2022-10-14 4:40 ` [RFC PATCH v4 1/8] dt-bindings: bus: add CDX bus device tree bindings Nipun Gupta
2022-10-14 14:17 ` Rob Herring
2022-10-17 10:18 ` Gupta, Nipun
2022-10-14 4:40 ` [RFC PATCH v4 2/8] bus/cdx: add the cdx bus driver Nipun Gupta
2022-10-14 7:15 ` Greg KH
2022-10-14 8:12 ` Gupta, Nipun
2022-10-14 7:18 ` Greg KH
2022-10-14 8:20 ` Gupta, Nipun
2022-10-14 4:40 ` [RFC PATCH v4 3/8] iommu/arm-smmu-v3: support ops registration for CDX bus Nipun Gupta
2022-10-14 4:51 ` Gupta, Nipun
2022-10-14 4:40 ` [RFC PATCH v4 4/8] bux/cdx: support dma configuration for CDX devices Nipun Gupta
2022-10-14 4:40 ` [RFC PATCH v4 5/8] bus/cdx: add bus and device attributes Nipun Gupta
2022-10-14 4:40 ` [RFC PATCH v4 6/8] irq/msi: use implicit msi domain for alloc and free Nipun Gupta
2022-10-14 4:40 ` [RFC PATCH v4 7/8] bus/cdx: add cdx-MSI domain with gic-its domain as parent Nipun Gupta
2022-11-17 19:10 ` Thomas Gleixner
2022-10-14 4:40 ` [RFC PATCH v4 8/8] bus/cdx: add cdx controller Nipun Gupta
2022-10-14 14:10 ` [RFC PATCH v4 0/8] add support for CDX bus Rob Herring
2022-10-17 10:08 ` Gupta, Nipun
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