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Wed, 12 Mar 2025 17:03:27 +0000 Message-ID: <94add491-592a-4f89-9212-24e04aa09a82@intel.com> Date: Wed, 12 Mar 2025 18:03:21 +0100 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next 04/16] libeth: add XSk helpers To: Maciej Fijalkowski CC: , Michal Kubiak , Tony Nguyen , "Przemek Kitszel" , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , "Alexei Starovoitov" , Daniel Borkmann , "Jesper Dangaard Brouer" , John Fastabend , Simon Horman , , , References: <20250305162132.1106080-1-aleksander.lobakin@intel.com> <20250305162132.1106080-5-aleksander.lobakin@intel.com> From: Alexander Lobakin Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-ClientProxiedBy: MI2P293CA0007.ITAP293.PROD.OUTLOOK.COM (2603:10a6:290:45::7) To DS0PR11MB8718.namprd11.prod.outlook.com (2603:10b6:8:1b9::20) Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS0PR11MB8718:EE_|MW3PR11MB4729:EE_ X-MS-Office365-Filtering-Correlation-Id: 0df7ebb5-68a3-4155-8baa-08dd6187ced4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|7416014|1800799024|366016; X-Microsoft-Antispam-Message-Info: =?utf-8?B?d090VjFSa3JwSFlmRDVVZW9jUEZtb3FWT2J3M21RT3M1MFZKblczTVRUeG5W?= =?utf-8?B?enhPV0xHR3MzemJNZUlmTW9Jekorbm4ycDNyR3JpQ1ZocnpFOTNJTnk4emhn?= =?utf-8?B?Wk4wRmtKYVVsaklHc25tTm0rZ2lsS2JqL0JaM3pWMUZiZy9XRkxRWWRBakpG?= =?utf-8?B?YTltRHJpWTZQZEMzY29rMGZIdi9abVBpYjh0WnpNOWFiYkVVblo2ZEMzcXpa?= =?utf-8?B?bmw1M3UxT1QzQVRjSFNkb3BnZHp1MEZUYWJwRDdlWHpBMGJGck0vQnUxd1Bu?= =?utf-8?B?NkdqYmlnU2RFdzdzNVMyb0JsQXdnUkRtUlJ3em9UaWJYdnFoQlRVb2ROVU96?= =?utf-8?B?Q3RCNUFJTHp2THhNTzROeCtadGZPSCtBR1ZaeG41amNYK0dCMmRMMWlUSTFq?= =?utf-8?B?UWVkVU9YalZRU2dDRG5TclBEb0dONnRnZzMydFJGR0sxamRJSFFzcDgyUXB6?= =?utf-8?B?bWlieWljdEFjOFlSMnY2Y21LRGJsSVdiREw4NEZYeUZVNlZwNUF4Q0ZCVSsr?= =?utf-8?B?UEN6MXZEUGFqUUNzTmRvc0V1dTNhVzY4ZUY5RGl2Q3dGS0tQbXQraHNtTEpH?= =?utf-8?B?SjdCSXhxUW02L005NGpRNVFjT0lsSFZGRGxuQUtyVWFwTzFqL1Q4eUJwbmJ3?= =?utf-8?B?UXZVVU5lVWVtVnd2N1ZvUm52KzhBY3dvM2ZDK2RNSkllMXIvUmNIaEJsd0ZT?= =?utf-8?B?UXl0dktRaWlQQ3FiSVJKYzhTWjFXanlINnBQL3NybTA4SW5VRzhMWENhRVla?= =?utf-8?B?ZlFXaURqbmN6WlJXTXplSVpCTHQvWGY4NHVmVW5jK1JHTitDR1JtNisyRFpk?= =?utf-8?B?aWgzU2s2dTcxSnU4R0djOFVyV3VtN3R0WDRKQWF2SmV6WjJIQkVTQ0ZZOUYv?= =?utf-8?B?OVh2K1gvY2tsMnVMQ2xyOVF2RDhkdmZTQW5YU0xrN3UwbHRUL3VXTmlUbGRj?= =?utf-8?B?Nnh1RWxoWHlDbFlJVGdCT1h3NjBJSVdPMGFwd0RGbE50WkNJeG5vb3hGUEJV?= =?utf-8?B?dXdiajBFTEkzb05OS3BPZ3pVbGIxelpkNktvcE1QdnFrd1dMWHg1SXNWYlZ0?= =?utf-8?B?SHVTY0FIZU51SnZNZUJJUDF4VGIyZEJ1c2pqL3IzU2ZiV3lpSVY0VTh2RHBP?= =?utf-8?B?cnhPbEFvUDFNbEVJQWpUOGIzbEt5ek9OZzZQaXBGWkNYZ0ptcVkzdDQ2N0cr?= =?utf-8?B?ZUFDYlczbTdJbUNKdncrR1BCNmJVSTVSc0lOU1BqZ1pNcHQvN2dxeUkyazhE?= =?utf-8?B?NVlOR0xNODRHK0hFUEduRStGWFM0dFM1OU9kRmZPYlJYcDlFRklhTGRYVUhD?= =?utf-8?B?RCtsU2VaZ1pQNFkzckhrUU9LVnlobkxsU0RER0ZJZGFaaEVmSWVUa3o2Uy9m?= =?utf-8?B?YzAwVVZ5ZEdEUDVaZExmYWtCQ3NLTnNZSzV1THVUYzNzU0haN3hoYTYvYkRY?= =?utf-8?B?Rko4blBhMFlVZFJGMzZsYVBTMWZUemNFeHF1N01WNXNnZVhDMEpHREpTNzFM?= =?utf-8?B?ZGZTK0F0WVR2RlFjcENuNGR4U1J1TUZjMmFlVk82R0lEVUl5aUJTc1YweFFN?= =?utf-8?B?emdiUTRFWm1xOERFRzlrbGdXMU9NZTRURDFBOHo2b29zL21JdmdvdHhoZFhU?= =?utf-8?B?QmV4K1BnZVJSazhrY1lPb3VlRzFNSVRmY1RKVTZ1Z0FKKzlCSmUxZUJaK1E2?= =?utf-8?B?TmEyZ1l4MWhCSVRCRGZsakNlVXQxSVlZUTg3NTk1SHYyeXdodit4cE00QWt0?= =?utf-8?B?YVVDSVh4VlZjcW1SSFFyc0NHUFdDZzlDVlhtV1Fuam9hWDBXNjdNQnNYNDdN?= =?utf-8?B?VnVzcXpvaW1aSmE2TFVHMndBZTlUc2VIWlVHamVpZ0RVZ3U0OCtDYlRuaUdx?= =?utf-8?Q?jH0u6TM5zlnxQ?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DS0PR11MB8718.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(376014)(7416014)(1800799024)(366016);DIR:OUT;SFP:1101; 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>> * running XDP prog and managing all possible verdicts; >> * xmit (with S/G and metadata support); >> * wakeup via CSD/IPI; >> * FQ init/deinit and refilling. >> >> Xmit by default unrolls loops by 8 when filling Tx DMA descriptors. >> XDP_REDIRECT verdict is considered default/likely(). Rx frags are >> considered unlikely(). >> It is assumed that Tx/completion queues are not mapped to any >> interrupts, thus we clean them only when needed (=> 3/4 of >> descriptors is busy) and keep need_wakeup set. >> IPI for XSk wakeup showed better performance than triggering an SW >> NIC interrupt, though it doesn't respect NIC's interrupt affinity. > > Maybe introduce this with xsk support on idpf (i suppose when set after > this one) ? > > Otherwise, what is the reason to have this included? I didn't check > in-depth if there are any functions used from this patch on drivers side. I did split libeth_xdp into two commits only to ease reviewing a bit. There's also stuff from Michał in progress which converts ice to libeth_xdp and adds XDP to iavf... I don't want to block it by idpf, who knows which one will go first :> > >> >> Suggested-by: Maciej Fijalkowski # lots of stuff >> Signed-off-by: Alexander Lobakin >> --- >> drivers/net/ethernet/intel/libeth/Kconfig | 2 +- >> drivers/net/ethernet/intel/libeth/Makefile | 1 + >> drivers/net/ethernet/intel/libeth/priv.h | 11 + >> include/net/libeth/tx.h | 10 +- >> include/net/libeth/xdp.h | 90 ++- >> include/net/libeth/xsk.h | 685 +++++++++++++++++++++ >> drivers/net/ethernet/intel/libeth/tx.c | 5 +- >> drivers/net/ethernet/intel/libeth/xdp.c | 26 +- >> drivers/net/ethernet/intel/libeth/xsk.c | 269 ++++++++ >> 9 files changed, 1067 insertions(+), 32 deletions(-) >> create mode 100644 include/net/libeth/xsk.h >> create mode 100644 drivers/net/ethernet/intel/libeth/xsk.c Thanks, Olek