From: "Zhang, Helin" <helin.zhang@intel.com>
To: "Topel, Bjorn" <bjorn.topel@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: "david.marchand@6wind.com" <david.marchand@6wind.com>,
"Wu, Jingjing" <jingjing.wu@intel.com>
Subject: Re: [dpdk-dev] [PATCH v2] i40evf: Report error if HW CRC strip is disabled for Linux PF hosts
Date: Fri, 22 Apr 2016 01:52:01 +0000 [thread overview]
Message-ID: <F35DEAC7BCE34641BA9FAC6BCA4A12E70AA12288@SHSMSX103.ccr.corp.intel.com> (raw)
In-Reply-To: <1461250975-14437-1-git-send-email-bjorn.topel@intel.com>
> -----Original Message-----
> From: Topel, Bjorn
> Sent: Thursday, April 21, 2016 11:03 PM
> To: dev@dpdk.org
> Cc: david.marchand@6wind.com; Zhang, Helin <helin.zhang@intel.com>; Wu,
> Jingjing <jingjing.wu@intel.com>; Topel, Bjorn <bjorn.topel@intel.com>
> Subject: [PATCH v2] i40evf: Report error if HW CRC strip is disabled for Linux PF
> hosts
>
> On Linux PF hosts, the VF has no means of changing the HW CRC strip setting for
> a RX queue. It's implicitly enabled.
>
> This patch checks if the host is running a Linux PF kernel driver, and returns an
> error, if HW CRC stripping was disabled.
>
> Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
> ---
> drivers/net/i40e/i40e_ethdev_vf.c | 15 +++++++++++++++
> 1 file changed, 15 insertions(+)
>
> diff --git a/drivers/net/i40e/i40e_ethdev_vf.c
> b/drivers/net/i40e/i40e_ethdev_vf.c
> index 2bce69b..0057ed6 100644
> --- a/drivers/net/i40e/i40e_ethdev_vf.c
> +++ b/drivers/net/i40e/i40e_ethdev_vf.c
> @@ -1567,6 +1567,8 @@ i40evf_dev_configure(struct rte_eth_dev *dev) {
> struct i40e_adapter *ad =
> I40E_DEV_PRIVATE_TO_ADAPTER(dev->data->dev_private);
> + struct rte_eth_conf *conf = &dev->data->dev_conf;
> + struct i40e_vf *vf;
>
> /* Initialize to TRUE. If any of Rx queues doesn't meet the bulk
> * allocation or vector Rx preconditions we will reset it.
> @@ -1576,6 +1578,19 @@ i40evf_dev_configure(struct rte_eth_dev *dev)
> ad->tx_simple_allowed = true;
> ad->tx_vec_allowed = true;
>
> + /* For Linux PF hosts, VF has no ability to disable HW CRC strip,
> + * and is implicitly enabled by the PF.
> + */
> + if (!conf->rxmode.hw_strip_crc) {
> + vf = I40EVF_DEV_PRIVATE_TO_VF(dev->data->dev_private);
> + if ((vf->version_major == I40E_VIRTCHNL_VERSION_MAJOR) &&
> + (vf->version_minor <= I40E_VIRTCHNL_VERSION_MINOR)) {
> + /* Peer is Linux PF host. */
Can you reword above comments?
It just means the host is not DPDK PF host driver, it could be Linux driver,
and possible others (e.g. FreeBSD, VMWARE?).
Thanks,
Helin
> + PMD_INIT_LOG(ERR, "VF can't disable HW CRC Strip");
> + return -EINVAL;
> + }
> + }
> +
> return i40evf_init_vlan(dev);
> }
>
> --
> 2.7.4
next prev parent reply other threads:[~2016-04-22 1:52 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-14 14:58 [dpdk-dev] [PATCH] i40evf: Ignore disabled HW CRC strip " Björn Töpel
2016-04-15 7:40 ` David Marchand
2016-04-15 8:07 ` Zhang, Helin
2016-04-18 18:47 ` Topel, Bjorn
2016-04-19 2:31 ` Zhang, Helin
2016-04-21 15:02 ` [dpdk-dev] [PATCH v2] i40evf: Report error if HW CRC strip is disabled " Björn Töpel
2016-04-22 1:52 ` Zhang, Helin [this message]
2016-04-22 4:54 ` Topel, Bjorn
2016-04-22 5:07 ` Zhang, Helin
2016-04-22 5:17 ` Topel, Bjorn
2016-04-22 5:18 ` Zhang, Helin
2016-04-22 5:39 ` [dpdk-dev] [PATCH v3] i40evf: Report error if HW CRC strip is disabled for non-DPDK " Björn Töpel
2016-04-29 13:42 ` Zhang, Helin
2016-05-03 10:55 ` Bruce Richardson
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