i40evf: report error for unsupported CRC stripping config

On hosts running a non-DPDK PF driver, 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 non-DPDK PF kernel driver,
and returns an error, if HW CRC stripping was not requested in the port
configuration.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>
This commit is contained in:
Björn Töpel 2016-04-22 07:39:22 +02:00 committed by Bruce Richardson
parent 39c7226265
commit 1bbcc5d211

View File

@ -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 non-DPDK PF drivers, 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 running non-DPDK PF driver. */
PMD_INIT_LOG(ERR, "VF can't disable HW CRC Strip");
return -EINVAL;
}
}
return i40evf_init_vlan(dev);
}