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octeontx2-pf: Fix ntuple rule creation to direct packet to VF with higher Rx queue than its PF

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[ Upstream commit 4aa1d8f89b10cdc25a231dabf808d8935e0b137a ]

It is possible to add a ntuple rule which would like to direct packet to
a VF whose number of queues are greater/less than its PF's queue numbers.
For example a PF can have 2 Rx queues but a VF created on that PF can have
8 Rx queues. As of today, ntuple rule will reject rule because it is
checking the requested queue number against PF's number of Rx queues.
As a part of this fix if the action of a ntuple rule is to move a packet
to a VF's queue then the check is removed. Also, a debug information is
printed to aware user that it is user's responsibility to cross check if
the requested queue number on that VF is a valid one.

Fixes: f0a1913f8a ("octeontx2-pf: Add support for ethtool ntuple filters")
Signed-off-by: Suman Ghosh <sumang@marvell.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20231121165624.3664182-1-sumang@marvell.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Suman Ghosh 2023-11-21 22:26:24 +05:30 • committed by Greg Kroah-Hartman
parent 97703eb199
commit 76b088b639
1 changed files with 19 additions and 1 deletions
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20
drivers/net/ethernet/marvell/octeontx2/nic/otx2_flows.c
View file

@ -1069,6 +1069,7 @@ int otx2_add_flow(struct otx2_nic *pfvf, struct ethtool_rxnfc *nfc)
struct ethhdr *eth_hdr;
bool new = false;
int err = 0;
u64 vf_num;
u32 ring;
if (!flow_cfg->max_flows) {
@ -1081,7 +1082,21 @@ int otx2_add_flow(struct otx2_nic *pfvf, struct ethtool_rxnfc *nfc)
if (!(pfvf->flags & OTX2_FLAG_NTUPLE_SUPPORT))
return -ENOMEM;
if (ring >= pfvf->hw.rx_queues && fsp->ring_cookie != RX_CLS_FLOW_DISC)
/* Number of queues on a VF can be greater or less than
* the PF's queue. Hence no need to check for the
* queue count. Hence no need to check queue count if PF
* is installing for its VF. Below is the expected vf_num value
* based on the ethtool commands.
*
* e.g.
* 1. ethtool -U <netdev> ... action -1 ==> vf_num:255
* 2. ethtool -U <netdev> ... action <queue_num> ==> vf_num:0
* 3. ethtool -U <netdev> ... vf <vf_idx> queue <queue_num> ==>
* vf_num:vf_idx+1
*/
vf_num = ethtool_get_flow_spec_ring_vf(fsp->ring_cookie);
if (!is_otx2_vf(pfvf->pcifunc) && !vf_num &&
ring >= pfvf->hw.rx_queues && fsp->ring_cookie != RX_CLS_FLOW_DISC)
return -EINVAL;
if (fsp->location >= otx2_get_maxflows(flow_cfg))
@ -1163,6 +1178,9 @@ int otx2_add_flow(struct otx2_nic *pfvf, struct ethtool_rxnfc *nfc)
flow_cfg->nr_flows++;
}
if (flow->is_vf)
netdev_info(pfvf->netdev,
"Make sure that VF's queue number is within its queue limit\n");
return 0;
}