linux-kernel - Re: [Patch v6 00/12] Introduce Microsoft Azure Network Adapter (MANA) RDMA driver

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Date:   Wed, 21 Sep 2022 13:25:25 -0300
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     longli@...rosoft.com
Cc:     "K. Y. Srinivasan" <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Wei Liu <wei.liu@...nel.org>, Dexuan Cui <decui@...rosoft.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Leon Romanovsky <leon@...nel.org>, edumazet@...gle.com,
        shiraz.saleem@...el.com, Ajay Sharma <sharmaajay@...rosoft.com>,
        linux-hyperv@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org
Subject: Re: [Patch v6 00/12] Introduce Microsoft Azure Network Adapter
 (MANA) RDMA driver

On Tue, Sep 20, 2022 at 06:22:20PM -0700, longli@...uxonhyperv.com wrote:
> From: Long Li <longli@...rosoft.com>
> 
> This patchset implements a RDMA driver for Microsoft Azure Network
> Adapter (MANA). In MANA, the RDMA device is modeled as an auxiliary device
> to the Ethernet device.
> 
> The first 11 patches modify the MANA Ethernet driver to support RDMA driver.
> The last patch implementes the RDMA driver.
> 
> The user-mode of the driver is being reviewed at:
> https://github.com/linux-rdma/rdma-core/pull/1177
> 
> 
> Ajay Sharma (3):
>   net: mana: Set the DMA device max segment size
>   net: mana: Define and process GDMA response code
>     GDMA_STATUS_MORE_ENTRIES
>   net: mana: Define data structures for protection domain and memory
>     registration
> 
> Long Li (9):
>   net: mana: Add support for auxiliary device
>   net: mana: Record the physical address for doorbell page region
>   net: mana: Handle vport sharing between devices
>   net: mana: Add functions for allocating doorbell page from GDMA
>   net: mana: Export Work Queue functions for use by RDMA driver
>   net: mana: Record port number in netdev
>   net: mana: Move header files to a common location
>   net: mana: Define max values for SGL entries
>   RDMA/mana_ib: Add a driver for Microsoft Azure Network Adapter

Still some basic checkpatchy stuff:

/tmp/tmpm2fsg47h/0012-RDMA-mana_ib-Add-a-driver-for-Microsoft-Azure-Network-Adapter.patch:412: WARNING: quoted string split across lines
#412: FILE: drivers/infiniband/hw/mana/main.c:70:
+		  "vport handle %llx pdid %x doorbell_id %x "
+		  "tx_shortform_allowed %d tx_vp_offset %u\n",

/tmp/tmpm2fsg47h/0012-RDMA-mana_ib-Add-a-driver-for-Microsoft-Azure-Network-Adapter.patch:540: WARNING: quoted string split across lines
#540: FILE: drivers/infiniband/hw/mana/main.c:198:
+		  "size_dma_region %lu num_pages_total %lu, "
+		  "page_sz 0x%llx offset_in_page %u\n",

And it thinks you should write more for the kconfig symbol, eg why
would someone want to turn it on (hint, to use dpkd on some Azure
instances)

/tmp/tmpm2fsg47h/0012-RDMA-mana_ib-Add-a-driver-for-Microsoft-Azure-Network-Adapter.patch:100: WARNING: please write a help paragraph that fully describes the config symbol
#100: FILE: drivers/infiniband/hw/mana/Kconfig:2:
+config MANA_INFINIBAND
+	tristate "Microsoft Azure Network Adapter support"
+	depends on NETDEVICES && ETHERNET && PCI && MICROSOFT_MANA
+	help
+	  This driver provides low-level RDMA support for
+	  Microsoft Azure Network Adapter (MANA).

I'll put it in linux-next and you can fix the rest of the stuff bots
will usually find.

Jason