From: Shai Malin <smalin@marvell.com>
To: Boris Pismenny <borisp@mellanox.com>,
"kuba@kernel.org" <kuba@kernel.org>,
"davem@davemloft.net" <davem@davemloft.net>,
"saeedm@nvidia.com" <saeedm@nvidia.com>,
"hch@lst.de" <hch@lst.de>, "sagi@grimberg.me" <sagi@grimberg.me>,
"axboe@fb.com" <axboe@fb.com>,
"kbusch@kernel.org" <kbusch@kernel.org>,
"viro@zeniv.linux.org.uk" <viro@zeniv.linux.org.uk>,
"edumazet@google.com" <edumazet@google.com>
Cc: Yoray Zack <yorayz@mellanox.com>,
"yorayz@nvidia.com" <yorayz@nvidia.com>,
"boris.pismenny@gmail.com" <boris.pismenny@gmail.com>,
Ben Ben-Ishay <benishay@mellanox.com>,
"benishay@nvidia.com" <benishay@nvidia.com>,
"linux-nvme@lists.infradead.org" <linux-nvme@lists.infradead.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
Or Gerlitz <ogerlitz@mellanox.com>,
"ogerlitz@nvidia.com" <ogerlitz@nvidia.com>
Subject: RE: [PATCH v1 net-next 07/15] nvme-tcp : Recalculate crc in the end of the capsule
Date: Tue, 15 Dec 2020 14:07:27 +0000 [thread overview]
Message-ID: <PH0PR18MB3845EC64645DFFA3BA9BCD63CCC60@PH0PR18MB3845.namprd18.prod.outlook.com> (raw)
In-Reply-To: <20201207210649.19194-8-borisp@mellanox.com>
> crc offload of the nvme capsule. Check if all the skb bits are on, and if not
> recalculate the crc in SW and check it.
>
> This patch reworks the receive-side crc calculation to always run at the end,
> so as to keep a single flow for both offload and non-offload. This change
> simplifies the code, but it may degrade performance for non-offload crc
> calculation.
>
> Signed-off-by: Boris Pismenny <borisp@mellanox.com>
> Signed-off-by: Ben Ben-Ishay <benishay@mellanox.com>
> Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
> Signed-off-by: Yoray Zack <yorayz@mellanox.com>
> ---
> drivers/nvme/host/tcp.c | 111 ++++++++++++++++++++++++++++++++----
> ----
> 1 file changed, 91 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c index
> 534fd5c00f33..3c10c8876036 100644
> --- a/drivers/nvme/host/tcp.c
> +++ b/drivers/nvme/host/tcp.c
> @@ -69,6 +69,7 @@ enum nvme_tcp_queue_flags {
> NVME_TCP_Q_LIVE = 1,
> NVME_TCP_Q_POLLING = 2,
> NVME_TCP_Q_OFFLOADS = 3,
> + NVME_TCP_Q_OFF_CRC_RX = 4,
Because only the data digest is offloaded, and not the header digest,
in order to avoid confusion, I suggest replacing the term
NVME_TCP_Q_OFF_CRC_RX with NVME_TCP_Q_OFF_DDGST_RX.
> };
next prev parent reply other threads:[~2020-12-15 14:08 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-07 21:06 [PATCH v1 net-next 00/15] nvme-tcp receive offloads Boris Pismenny
2020-12-07 21:06 ` [PATCH v1 net-next 01/15] iov_iter: Skip copy in memcpy_to_page if src==dst Boris Pismenny
2020-12-08 0:39 ` David Ahern
2020-12-08 14:30 ` Boris Pismenny
2020-12-07 21:06 ` [PATCH v1 net-next 02/15] net: Introduce direct data placement tcp offload Boris Pismenny
2020-12-08 0:42 ` David Ahern
2020-12-08 14:36 ` Boris Pismenny
2020-12-09 0:38 ` David Ahern
2020-12-09 8:15 ` Boris Pismenny
2020-12-10 4:26 ` David Ahern
2020-12-11 2:01 ` Jakub Kicinski
2020-12-11 2:43 ` David Ahern
2020-12-11 18:45 ` Jakub Kicinski
2020-12-11 18:58 ` Eric Dumazet
2020-12-11 19:59 ` David Ahern
2020-12-11 23:05 ` Jonathan Lemon
2020-12-13 18:34 ` Boris Pismenny
2020-12-13 18:21 ` Boris Pismenny
2020-12-15 5:19 ` David Ahern
2020-12-17 19:06 ` Boris Pismenny
2020-12-18 0:44 ` David Ahern
2020-12-09 0:57 ` David Ahern
2020-12-09 1:11 ` David Ahern
2020-12-09 8:28 ` Boris Pismenny
2020-12-09 8:25 ` Boris Pismenny
2020-12-07 21:06 ` [PATCH v1 net-next 03/15] net: Introduce crc offload for tcp ddp ulp Boris Pismenny
2020-12-07 21:06 ` [PATCH v1 net-next 04/15] net/tls: expose get_netdev_for_sock Boris Pismenny
2020-12-09 1:06 ` David Ahern
2020-12-09 7:41 ` Boris Pismenny
2020-12-10 3:39 ` David Ahern
2020-12-11 18:43 ` Boris Pismenny
2020-12-07 21:06 ` [PATCH v1 net-next 05/15] nvme-tcp: Add DDP offload control path Boris Pismenny
2020-12-10 17:15 ` Shai Malin
2020-12-14 6:38 ` Boris Pismenny
2020-12-15 13:33 ` Shai Malin
2020-12-17 18:51 ` Boris Pismenny
2020-12-07 21:06 ` [PATCH v1 net-next 06/15] nvme-tcp: Add DDP data-path Boris Pismenny
2020-12-07 21:06 ` [PATCH v1 net-next 07/15] nvme-tcp : Recalculate crc in the end of the capsule Boris Pismenny
2020-12-15 14:07 ` Shai Malin [this message]
2020-12-07 21:06 ` [PATCH v1 net-next 08/15] nvme-tcp: Deal with netdevice DOWN events Boris Pismenny
2020-12-07 21:06 ` [PATCH v1 net-next 09/15] net/mlx5: Header file changes for nvme-tcp offload Boris Pismenny
2020-12-07 21:06 ` [PATCH v1 net-next 10/15] net/mlx5: Add 128B CQE for NVMEoTCP offload Boris Pismenny
2020-12-07 21:06 ` [PATCH v1 net-next 11/15] net/mlx5e: TCP flow steering for nvme-tcp Boris Pismenny
2020-12-07 21:06 ` [PATCH v1 net-next 12/15] net/mlx5e: NVMEoTCP DDP offload control path Boris Pismenny
2020-12-07 21:06 ` [PATCH v1 net-next 13/15] net/mlx5e: NVMEoTCP, data-path for DDP offload Boris Pismenny
2020-12-18 0:57 ` David Ahern
2020-12-07 21:06 ` [PATCH v1 net-next 14/15] net/mlx5e: NVMEoTCP statistics Boris Pismenny
2020-12-07 21:06 ` [PATCH v1 net-next 15/15] net/mlx5e: NVMEoTCP workaround CRC after resync Boris Pismenny
2021-01-14 1:27 ` [PATCH v1 net-next 00/15] nvme-tcp receive offloads Sagi Grimberg
2021-01-14 4:47 ` David Ahern
2021-01-14 19:21 ` Boris Pismenny
2021-01-14 19:17 ` Boris Pismenny
2021-01-14 21:07 ` Sagi Grimberg
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