net/ice: fix default RSS key configuration
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Commit Message
There's chance that rte_rand() doesn't provision suitable values for
RSS hash, an extreme example could be a key with a lot of 0s in it.
This patch adds a default RSS key which has been used in ixgbe driver
and fm10k driver.
Fixes: 50370662b727 ("net/ice: support device and queue ops")
Cc: stable@dpdk.org
Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
---
drivers/net/ice/ice_ethdev.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
Comments
> -----Original Message-----
> From: Wang, Xiao W <xiao.w.wang@intel.com>
> Sent: Tuesday, July 21, 2020 5:03 PM
> To: Zhang, Qi Z <qi.z.zhang@intel.com>
> Cc: dev@dpdk.org; Yang, Qiming <qiming.yang@intel.com>; Yao, Lei A
> <lei.a.yao@intel.com>; Wu, Jingjing <jingjing.wu@intel.com>; Wang, Xiao W
> <xiao.w.wang@intel.com>; stable@dpdk.org
> Subject: [PATCH] net/ice: fix default RSS key configuration
>
> There's chance that rte_rand() doesn't provision suitable values for RSS hash, an
> extreme example could be a key with a lot of 0s in it.
>
> This patch adds a default RSS key which has been used in ixgbe driver and fm10k
> driver.
>
> Fixes: 50370662b727 ("net/ice: support device and queue ops")
> Cc: stable@dpdk.org
>
> Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
Acked-by: Qi Zhang <qi.z.zhang@intel.com>
Applied to dpdk-next-net-intel.
Thanks
Qi
> -----Original Message-----
> From: Zhang, Qi Z
> Sent: Wednesday, July 22, 2020 1:26 PM
> To: Wang, Xiao W <xiao.w.wang@intel.com>
> Cc: dev@dpdk.org; Yang, Qiming <qiming.yang@intel.com>; Yao, Lei A
> <lei.a.yao@intel.com>; Wu, Jingjing <jingjing.wu@intel.com>; stable@dpdk.org
> Subject: RE: [PATCH] net/ice: fix default RSS key configuration
>
>
>
> > -----Original Message-----
> > From: Wang, Xiao W <xiao.w.wang@intel.com>
> > Sent: Tuesday, July 21, 2020 5:03 PM
> > To: Zhang, Qi Z <qi.z.zhang@intel.com>
> > Cc: dev@dpdk.org; Yang, Qiming <qiming.yang@intel.com>; Yao, Lei A
> > <lei.a.yao@intel.com>; Wu, Jingjing <jingjing.wu@intel.com>; Wang,
> > Xiao W <xiao.w.wang@intel.com>; stable@dpdk.org
> > Subject: [PATCH] net/ice: fix default RSS key configuration
> >
> > There's chance that rte_rand() doesn't provision suitable values for
> > RSS hash, an extreme example could be a key with a lot of 0s in it.
> >
> > This patch adds a default RSS key which has been used in ixgbe driver
> > and fm10k driver.
> >
> > Fixes: 50370662b727 ("net/ice: support device and queue ops")
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Xiao Wang <xiao.w.wang@intel.com>
>
> Acked-by: Qi Zhang <qi.z.zhang@intel.com>
>
> Applied to dpdk-next-net-intel.
After some internal discussion, we decide to keep the random key as default, and user can use rte_eth_dev_rss_hash_update to update a new key.
So the patch has been removed from dpdk-next-net-intel.
>
> Thanks
> Qi
@@ -2628,11 +2628,20 @@ static int ice_init_rss(struct ice_pf *pf)
vsi->rss_lut = rte_zmalloc(NULL,
vsi->rss_lut_size, 0);
+#define RSS_KEY_SIZE ICE_AQC_GET_SET_RSS_KEY_DATA_RSS_KEY_SIZE
+ static uint8_t rss_intel_key[RSS_KEY_SIZE] = {
+ 0x6D, 0x5A, 0x56, 0xDA, 0x25, 0x5B, 0x0E, 0xC2,
+ 0x41, 0x67, 0x25, 0x3D, 0x43, 0xA3, 0x8F, 0xB0,
+ 0xD0, 0xCA, 0x2B, 0xCB, 0xAE, 0x7B, 0x30, 0xB4,
+ 0x77, 0xCB, 0x2D, 0xA3, 0x80, 0x30, 0xF2, 0x0C,
+ 0x6A, 0x42, 0xB7, 0x3B, 0xBE, 0xAC, 0x01, 0xFA,
+ };
+
/* configure RSS key */
if (!rss_conf->rss_key) {
/* Calculate the default hash key */
for (i = 0; i <= vsi->rss_key_size; i++)
- vsi->rss_key[i] = (uint8_t)rte_rand();
+ vsi->rss_key[i] = rss_intel_key[i];
} else {
rte_memcpy(vsi->rss_key, rss_conf->rss_key,
RTE_MIN(rss_conf->rss_key_len,