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engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-11-04_05,2026-11-04_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 malwarescore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 spamscore=0 suspectscore=0 clxscore=1015 phishscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610300000 definitions=main-2611040063 --------------VPCoK90z8uWTh9FHeou7PNpk Content-Type: multipart/mixed; boundary="------------erFmylyvWfgRzMGG5rbeTH0Z"; protected-headers="v1"; hp="clear" Message-ID: Date: Wed, 4 Nov 2026 08:03:20 -0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 00/23] Subject: [PATCH net-next 00/23] net/hpe: add HPE Slingshot NIC drivers To: Jason Gunthorpe Cc: Andrew Lunn , Jakub Kicinski , Slingshot Open Source Team , Nathan Chancellor , Nicolas Schier , Richard Cochran , Andrew Lunn , "David S. Miller" , Eric Dumazet , Paolo Abeni , Sumit Semwal , =?UTF-8?Q?Christian_K=C3=B6nig?= , Guenter Roeck , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-kbuild@vger.kernel.org, Sandeep Bhoot , Iraimani P , Mamila Santosh , Leon Romanovsky References: <20261030-cxi-netdev-submission-v1-0-8c2c391cc283@hpe.com> <20261030151121.1f232b50@kernel.org> <7d4583c2-e8dc-4ffb-bc45-e2121f824b14@lunn.ch> <2f831f13-58ff-40ca-a76f-3aca647012b6@lunn.ch> <3418b0f9-d053-4be1-81a0-fc938fc5a7ac@hpe.com> <20261104133938.GP3889730@ziepe.ca> Content-Language: en-US From: Doug Ledford Organization: Hewlett Packard Enterprise In-Reply-To: <20261104133938.GP3889730@ziepe.ca> --------------erFmylyvWfgRzMGG5rbeTH0Z Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 11/4/26 5:39 AM, Jason Gunthorpe wrote: > On Tue, Nov 03, 2026 at 08:21:05PM -0800, Doug Ledford wrote: >> Top-posting an executive summary: HPE's ask is whether we should submi= t >> this driver through the netdev community or the rdma community. HPE >> prefers netdev, with RDMA as an aux driver, but needs the maintainers=E2= =80=99 >> call. A minimal Ethernet driver is about 48k lines plus 36k lines of >> mostly machine-generated headers (details below). >=20 > It depends on a simple question: can you create a functional ultra > ethernet device without a netdev and without an IP or routing table? > Like IB? >=20 > If yes then maybe you could do RDMA first. >=20 > If no, then you must get a netdev first. >=20 > Jason That's tricky to answer. Can you create portals table entries for Slingshot and ignore IP, yes. But, you also normally connect to a fabric manager over an IP socket in order to get your NID (similar to IB's LID) and that's what you then use for RDMA traffic. But the NID can also be derived from the MAC address. So, it can go either way. --=20 Doug Ledford GPG KeyID: B826A3330E572FDD Key fingerprint =3D AE6B 1BDA 122B 23B4 265B 1274 B826 A333 0E57 2FD= D --------------erFmylyvWfgRzMGG5rbeTH0Z-- --------------VPCoK90z8uWTh9FHeou7PNpk Content-Type: application/pgp-signature; name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature.asc" -----BEGIN PGP SIGNATURE----- wsF5BAABCAAjFiEErmsb2hIrI7QmWxJ0uCajMw5XL90FAmrrV0gFAwAAAAAACgkQuCajMw5XL915 LA/8Drat0FkxPCgXJNIpNUTOlZQIG2QTwhaBnWU0ue6JKvDHVgnEmH08qyYmNdIAELPJY+KjySNo JR9/1DxCinn5rGkDxyzOiX7AvSY9bcp0cHHE0bbzeGbF86yps3JXnrAkzC+5NrxzYOIGsZfc4Muf jUBQNLTFasEHNfakPutKqeTZO1u+He6L37vL7J4vzNgRMSUqB3yBzagsGZEEz3Rd2Q3kMm0tJpgj eWpKxpEiYl+OJ8RUpIe10zS+TY3oVVwcej2KyNa8qQxxXgwuZUy9ksm55885zyhErZTrzX6iOjJA aWK6dDMPAOpsuxdII9hvZY/4hxnnc1zpiQQeUrXdYhw9A4P0npmbs5CiVe2QpoWn899kOdGBbdze ydYNQjYtHQ1Od9h45DrJ7mH3ukBXerDUcDcPAbu4hlk1TaTL8NX1g/raZzgyLItPNuzAHs241XN/ +JNVKerbSS0h+kd1RfgLIyYB98WtXF9FyuG6DICjQgF45x9vyGyDx0W79/Al5uOPk+NtT8xKYe8Z lETJoyJN837JKrQEH2QHc0ghVsiQahyNEWcjjHx7DWO5or2csAYpgdDC2KKlHI54lNOA/AjyXYYi qNMPjmrjRX5hCoitJdUJpjq+W2WX+HupHBs1PPRoBkJQryaZG6qrEasF/MpkgoZeB91HzYqLtBnO VG4= =9Ev2 -----END PGP SIGNATURE----- --------------VPCoK90z8uWTh9FHeou7PNpk--