linux-kernel - Re: [PATCH net-next v6 0/5] net: stmmac: Add PCI driver support for BCM8958x

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Message-ID: <67919001-1cb7-4e9b-9992-5b3dd9b03406@quicinc.com>
Date: Fri, 7 Feb 2025 10:21:25 -0800
From: "Abhishek Chauhan (ABC)" <quic_abchauha@...cinc.com>
To: Jitendra Vegiraju <jitendra.vegiraju@...adcom.com>,
        <netdev@...r.kernel.org>
CC: <alexandre.torgue@...s.st.com>, <joabreu@...opsys.com>,
        <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <mcoquelin.stm32@...il.com>,
        <bcm-kernel-feedback-list@...adcom.com>, <richardcochran@...il.com>,
        <ast@...nel.org>, <daniel@...earbox.net>, <hawk@...nel.org>,
        <john.fastabend@...il.com>, <fancer.lancer@...il.com>,
        <rmk+kernel@...linux.org.uk>, <ahalaney@...hat.com>,
        <xiaolei.wang@...driver.com>, <rohan.g.thomas@...el.com>,
        <Jianheng.Zhang@...opsys.com>, <linux-kernel@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <bpf@...r.kernel.org>,
        <andrew@...n.ch>, <linux@...linux.org.uk>, <horms@...nel.org>,
        <florian.fainelli@...adcom.com>
Subject: Re: [PATCH net-next v6 0/5] net: stmmac: Add PCI driver support for
 BCM8958x



On 11/5/2024 8:12 AM, Jitendra Vegiraju wrote:
> Hi netdev team,
> 
> On Fri, Oct 18, 2024 at 1:53 PM <jitendra.vegiraju@...adcom.com> wrote:
>>
>> From: Jitendra Vegiraju <jitendra.vegiraju@...adcom.com>
>>
>> This patchset adds basic PCI ethernet device driver support for Broadcom
>> BCM8958x Automotive Ethernet switch SoC devices.
>>
>> This SoC device has PCIe ethernet MAC attached to an integrated ethernet
>> switch using XGMII interface. The PCIe ethernet controller is presented to
>> the Linux host as PCI network device.
>>
>> The following block diagram gives an overview of the application.
>>              +=================================+
>>              |       Host CPU/Linux            |
>>              +=================================+
>>                         || PCIe
>>                         ||
>>         +==========================================+
>>         |           +--------------+               |
>>         |           | PCIE Endpoint|               |
>>         |           | Ethernet     |               |
>>         |           | Controller   |               |
>>         |           |   DMA        |               |
>>         |           +--------------+               |
>>         |           |   MAC        |   BCM8958X    |
>>         |           +--------------+   SoC         |
>>         |               || XGMII                   |
>>         |               ||                         |
>>         |           +--------------+               |
>>         |           | Ethernet     |               |
>>         |           | switch       |               |
>>         |           +--------------+               |
>>         |             || || || ||                  |
>>         +==========================================+
>>                       || || || || More external interfaces
>>
>> The MAC block on BCM8958x is based on Synopsis XGMAC 4.00a core. This
>> MAC IP introduces new DMA architecture called Hyper-DMA for virtualization
>> scalability.
>>
>> Driver functionality specific to new MAC (DW25GMAC) is implemented in
>> new file dw25gmac.c.
>>
>> Management of integrated ethernet switch on this SoC is not handled by
>> the PCIe interface.
>> This SoC device has PCIe ethernet MAC directly attached to an integrated
>> ethernet switch using XGMII interface.
>>
>> v5->v6:
>>    Change summary to address comments/suggestions by Serge Semin.
>>    Patch1:
>>      Removed the comlexity of hdma mapping in previous patch series and
>>      use static DMA mapping.
>>      Renamed plat_stmmacenet_data::snps_dev_id as dev_id and moved to
>>      the beginning of the struct.
>>    Patch2:
>>      Added dw25gmac_get_hw_feature() for dw25gmac.
>>      Use static one-to-one VDMA-TC-PDMA mapping.
>>    Patch4:
>>      Remove usage of plat_stmmacenet_data::msi_*_vec variables for
>>      interrupt vector initialization.
>>      Change phy_interface type to XGMII.
>>      Cleanup unused macros.
>>
> 
> I would like to seek your guidance on how to take this patch series forward.
> Thanks to your feedback and Serge's suggestions, we made some forward
> progress on this patch series.
> Please make any suggestions to enable us to upstream driver support
> for BCM8958x.

Jitendra,
	 Have we resent this patch or got it approved ? I dont see any updates after this patch. 

> Thanks,
> Jitendra