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Date: Mon, 30 Mar 2015 11:10:22 +0300
From: Vlad Zolotarov <vladz@...udius-systems.com>
To: Alexander Duyck <alexander.duyck@...il.com>, netdev@...r.kernel.org
CC: jeffrey.t.kirsher@...el.com, avi@...udius-systems.com,
gleb@...udius-systems.com
Subject: Re: [PATCH net-next v9 2/7] ixgbe: Add a new netdev op to allow/prevent
a VF from querying an RSS info
On 03/30/15 01:32, Alexander Duyck wrote:
> On 03/29/2015 09:11 AM, Vlad Zolotarov wrote:
>> Implements the new netdev op to allow user to enable/disable the ability
>> of a specific VF to query its RSS Indirection Table and an RSS Hash Key.
>>
>> This patch limits the new feature support to 82599 and x540 devices only.
>> Support for other devices will be added later.
>>
>> Signed-off-by: Vlad Zolotarov <vladz@...udius-systems.com>
>> ---
>> New in v9:
>> - Reduce the support to 82599 and x540 devices only.
>> ---
>> drivers/net/ethernet/intel/ixgbe/ixgbe.h | 1 +
>> drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 7 ++++++
>> drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c | 30 ++++++++++++++++++++++++++
>> drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h | 2 ++
>> 4 files changed, 40 insertions(+)
>>
>> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe.h b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
>> index 42ed4b4..639aa1b 100644
>> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe.h
>> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe.h
>> @@ -151,6 +151,7 @@ struct vf_data_storage {
>> u16 tx_rate;
>> u16 vlan_count;
>> u8 spoofchk_enabled;
>> + bool rss_query_enabled;
>> unsigned int vf_api;
>> };
>>
>> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
>> index a99bc5d..1b04cb1 100644
>> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
>> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
>> @@ -3656,6 +3656,12 @@ static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
>> if (hw->mac.ops.set_ethertype_anti_spoofing)
>> hw->mac.ops.set_ethertype_anti_spoofing(hw, true, i);
>> }
>> +
>> + /* Enable/Disable RSS query feature */
>> + for (i = 0; i < adapter->num_vfs; i++)
>> + ixgbe_ndo_set_vf_rss_query_en(adapter->netdev, i,
>> + adapter->vfinfo[i].rss_query_enabled);
>> +
>> }
>>
>> static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
> Instead of looking through the VFs twice you could probably look at
> combining this with the loop directly above it.
>> @@ -8096,6 +8102,7 @@ static const struct net_device_ops ixgbe_netdev_ops = {
>> .ndo_set_vf_vlan = ixgbe_ndo_set_vf_vlan,
>> .ndo_set_vf_rate = ixgbe_ndo_set_vf_bw,
>> .ndo_set_vf_spoofchk = ixgbe_ndo_set_vf_spoofchk,
>> + .ndo_set_vf_rss_query_en = ixgbe_ndo_set_vf_rss_query_en,
>> .ndo_get_vf_config = ixgbe_ndo_get_vf_config,
>> .ndo_get_stats64 = ixgbe_get_stats64,
>> #ifdef CONFIG_IXGBE_DCB
>> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
>> index 09a291b..f08672a 100644
>> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
>> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.c
>> @@ -108,6 +108,15 @@ static int __ixgbe_enable_sriov(struct ixgbe_adapter *adapter)
>> /* enable spoof checking for all VFs */
>> for (i = 0; i < adapter->num_vfs; i++)
>> adapter->vfinfo[i].spoofchk_enabled = true;
>> +
>> + /* We support VF RSS querying only for 82599 and x540 devices at
>> + * the moment. These devices share RSS indirection table and
>> + * RSS hash key with PF therefore we want to disable the
>> + * querying by default.
>> + */
>> + for (i = 0; i < adapter->num_vfs; i++)
>> + adapter->vfinfo[i].rss_query_enabled = 0;
>> +
>> return 0;
>> }
>>
> Same here, no point in looping through all the VFs twice, just take care
> of sppofchk_enabled, and rss_query_enabled in one loop.
>
>> @@ -1330,6 +1339,26 @@ int ixgbe_ndo_set_vf_spoofchk(struct net_device *netdev, int vf, bool setting)
>> return 0;
>> }
>>
>> +int ixgbe_ndo_set_vf_rss_query_en(struct net_device *netdev, int vf,
>> + bool setting)
>> +{
>> + struct ixgbe_adapter *adapter = netdev_priv(netdev);
>> +
>> + /* This operation is currently supported only for 82599 and x540
>> + * devices.
>> + */
>> + if (adapter->hw.mac.type < ixgbe_mac_82599EB ||
>> + adapter->hw.mac.type >= ixgbe_mac_X550)
>> + return -EPERM;
>> +
> This should be not supported, not EPERM.
Agree with all the above. Fixing in v10.
>
>> + if (vf >= adapter->num_vfs)
>> + return -EINVAL;
>> +
>> + adapter->vfinfo[vf].rss_query_enabled = setting;
>> +
>> + return 0;
>> +}
>> +
>> int ixgbe_ndo_get_vf_config(struct net_device *netdev,
>> int vf, struct ifla_vf_info *ivi)
>> {
>> @@ -1343,5 +1372,6 @@ int ixgbe_ndo_get_vf_config(struct net_device *netdev,
>> ivi->vlan = adapter->vfinfo[vf].pf_vlan;
>> ivi->qos = adapter->vfinfo[vf].pf_qos;
>> ivi->spoofchk = adapter->vfinfo[vf].spoofchk_enabled;
>> + ivi->rss_query_en = adapter->vfinfo[vf].rss_query_enabled;
>> return 0;
>> }
>> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h
>> index 32c26d5..2c197e6 100644
>> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h
>> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.h
>> @@ -47,6 +47,8 @@ int ixgbe_ndo_set_vf_vlan(struct net_device *netdev, int queue, u16 vlan,
>> int ixgbe_ndo_set_vf_bw(struct net_device *netdev, int vf, int min_tx_rate,
>> int max_tx_rate);
>> int ixgbe_ndo_set_vf_spoofchk(struct net_device *netdev, int vf, bool setting);
>> +int ixgbe_ndo_set_vf_rss_query_en(struct net_device *netdev, int vf,
>> + bool setting);
>> int ixgbe_ndo_get_vf_config(struct net_device *netdev,
>> int vf, struct ifla_vf_info *ivi);
>> void ixgbe_check_vf_rate_limit(struct ixgbe_adapter *adapter);
--
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