From: Ferruh Yigit <ferruh.yigit@amd.com>
To: Raghav Roy <royra@vmware.com>, dev@dpdk.org
Cc: jbehrens@vmware.com
Subject: Re: [PATCH] net/vmxnet3: added checks for TCP for RSS Configuration
Date: Fri, 13 Jan 2023 16:24:23 +0000 [thread overview]
Message-ID: <e9a9768b-a968-5e06-aad5-eec0caf5f0f0@amd.com> (raw)
In-Reply-To: <20221222082434.18336-1-royra@vmware.com>
On 12/22/2022 8:24 AM, Raghav Roy wrote:
> Added checks for TCP in vmxnet3_rss_configure()
> This check ensures the hashType for RSS, when enabled
> just for UDP, is not NONE.
>
Mandatory hash functions for v4 already added in the past:
Commit 52ec00fd1474 ("net/vmxnet3: fix RSS setting on v4")
Now this commit adds it for all versions, why it was fine in the past
but it is needed now?
@Jochen, can you please help reviewing this patch?
> Signed-off-by: Raghav Roy <royra@vmware.com>
> ---
> drivers/net/vmxnet3/vmxnet3_rxtx.c | 9 ++++++++-
> 1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/vmxnet3/vmxnet3_rxtx.c b/drivers/net/vmxnet3/vmxnet3_rxtx.c
> index a875ffec07..e8407c9b2e 100644
> --- a/drivers/net/vmxnet3/vmxnet3_rxtx.c
> +++ b/drivers/net/vmxnet3/vmxnet3_rxtx.c
> @@ -1412,6 +1412,13 @@ vmxnet3_rss_configure(struct rte_eth_dev *dev)
> dev_rss_conf = hw->rss_conf;
> port_rss_conf = &dev->data->dev_conf.rx_adv_conf.rss_conf;
>
> + if ((port_rss_conf->rss_hf & VMXNET3_MANDATORY_V4_RSS) !=
> + VMXNET3_MANDATORY_V4_RSS) {
> + PMD_INIT_LOG(WARNING, "RSS: IPv4/6 TCP is required for vmxnet3 RSS, "
> + "automatically setting it");
> + port_rss_conf->rss_hf |= VMXNET3_MANDATORY_V4_RSS;
> + }
> +
`
#define VMXNET3_MANDATORY_V4_RSS ( \
RTE_ETH_RSS_NONFRAG_IPV4_TCP | \
RTE_ETH_RSS_NONFRAG_IPV6_TCP)
`
Can you please describe why IPv4/6 TCP hash function is required for driver?
And what is the impact, I mean what is the observed behavior without
this patch, if RSS is failing without this change patch needs to be fix
patch and please describe since when RSS is failing.
> /* loading hashFunc */
> dev_rss_conf->hashFunc = VMXNET3_RSS_HASH_FUNC_TOEPLITZ;
> /* loading hashKeySize */
> @@ -1419,6 +1426,7 @@ vmxnet3_rss_configure(struct rte_eth_dev *dev)
> /* loading indTableSize: Must not exceed VMXNET3_RSS_MAX_IND_TABLE_SIZE (128)*/
> dev_rss_conf->indTableSize = (uint16_t)((MAX_RX_QUEUES(hw)) * 4);
>
> +
> if (port_rss_conf->rss_key == NULL) {
> /* Default hash key */
> port_rss_conf->rss_key = rss_intel_key;
> @@ -1446,6 +1454,5 @@ vmxnet3_rss_configure(struct rte_eth_dev *dev)
> dev_rss_conf->hashType |= VMXNET3_RSS_HASH_TYPE_IPV6;
> if (rss_hf & RTE_ETH_RSS_NONFRAG_IPV6_TCP)
> dev_rss_conf->hashType |= VMXNET3_RSS_HASH_TYPE_TCP_IPV6;
> -
Please drop unrelated/unimportant syntax changes.
> return VMXNET3_SUCCESS;
> }
next prev parent reply other threads:[~2023-01-13 16:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-21 4:19 Raghav Roy
2022-12-22 8:24 ` Raghav Roy
2023-01-13 16:24 ` Ferruh Yigit [this message]
2023-01-13 22:03 ` Jochen Behrens
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=e9a9768b-a968-5e06-aad5-eec0caf5f0f0@amd.com \
--to=ferruh.yigit@amd.com \
--cc=dev@dpdk.org \
--cc=jbehrens@vmware.com \
--cc=royra@vmware.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).