From e7347a8aff483f22c75491ca1d59e1f822318500 Mon Sep 17 00:00:00 2001 From: Hyong Youb Kim Date: Sat, 2 Mar 2019 02:42:42 -0800 Subject: [PATCH] net/enic: allow flow mark ID 0 The driver currently accepts mark ID 0 but does not report it in matching packet's mbuf. For example, the following testpmd command succeeds. But, the mbuf of a matching IPv4 UDP packet does not have PKT_RX_FDIR_ID set. flow create 0 ingress pattern ... actions mark id 0 / queue index 0 / end The problem has to do with mapping mark IDs (32-bit) to NIC filter IDs. Filter ID is currently 16-bit, so values greater than 0xffff are rejected. The firmware reserves filter ID 0 for filters that do not mark (e.g. steer w/o mark). And, the driver reserves 0xffff for the flag action. This leaves 1...0xfffe for app use. It is possible to simply reject mark ID 0 as unsupported. But, 0 is commonly used (e.g. OVS-DPDK and VPP). So, when adding a filter, set filter ID = mark ID + 1 to support mark ID 0. The receive handler subtracts 1 from filter ID to get back the original mark ID. Fixes: dfbd6a9cb504 ("net/enic: extend flow director support for 1300 series") Cc: stable@dpdk.org Signed-off-by: Hyong Youb Kim Reviewed-by: John Daley --- doc/guides/nics/enic.rst | 1 + drivers/net/enic/enic_flow.c | 15 +++++++++++---- drivers/net/enic/enic_rxtx_common.h | 3 ++- 3 files changed, 14 insertions(+), 5 deletions(-) diff --git a/doc/guides/nics/enic.rst b/doc/guides/nics/enic.rst index bc38f51aa3..e456e6c2dd 100644 --- a/doc/guides/nics/enic.rst +++ b/doc/guides/nics/enic.rst @@ -450,6 +450,7 @@ PKT_RX_VLAN_STRIPPED mbuf flags would not be set. This mode is enabled with the 1000 for 1300 series VICs). Filters are checked for matching in the order they were added. Since there currently is no grouping or priority support, 'catch-all' filters should be added last. + - The supported range of IDs for the 'MARK' action is 0 - 0xFFFD. - **Statistics** diff --git a/drivers/net/enic/enic_flow.c b/drivers/net/enic/enic_flow.c index 55d8d50a11..e12a6ec733 100644 --- a/drivers/net/enic/enic_flow.c +++ b/drivers/net/enic/enic_flow.c @@ -1081,12 +1081,18 @@ enic_copy_action_v2(const struct rte_flow_action actions[], if (overlap & MARK) return ENOTSUP; overlap |= MARK; - /* ENIC_MAGIC_FILTER_ID is reserved and is the highest - * in the range of allows mark ids. + /* + * Map mark ID (32-bit) to filter ID (16-bit): + * - Reject values > 16 bits + * - Filter ID 0 is reserved for filters that steer + * but not mark. So add 1 to the mark ID to avoid + * using 0. + * - Filter ID (ENIC_MAGIC_FILTER_ID = 0xffff) is + * reserved for the "flag" action below. */ - if (mark->id >= ENIC_MAGIC_FILTER_ID) + if (mark->id >= ENIC_MAGIC_FILTER_ID - 1) return EINVAL; - enic_action->filter_id = mark->id; + enic_action->filter_id = mark->id + 1; enic_action->flags |= FILTER_ACTION_FILTER_ID_FLAG; break; } @@ -1094,6 +1100,7 @@ enic_copy_action_v2(const struct rte_flow_action actions[], if (overlap & MARK) return ENOTSUP; overlap |= MARK; + /* ENIC_MAGIC_FILTER_ID is reserved for flagging */ enic_action->filter_id = ENIC_MAGIC_FILTER_ID; enic_action->flags |= FILTER_ACTION_FILTER_ID_FLAG; break; diff --git a/drivers/net/enic/enic_rxtx_common.h b/drivers/net/enic/enic_rxtx_common.h index bfbb4909ed..66f631dfeb 100644 --- a/drivers/net/enic/enic_rxtx_common.h +++ b/drivers/net/enic/enic_rxtx_common.h @@ -226,7 +226,8 @@ enic_cq_rx_to_pkt_flags(struct cq_desc *cqd, struct rte_mbuf *mbuf) if (filter_id) { pkt_flags |= PKT_RX_FDIR; if (filter_id != ENIC_MAGIC_FILTER_ID) { - mbuf->hash.fdir.hi = clsf_cqd->filter_id; + /* filter_id = mark id + 1, so subtract 1 */ + mbuf->hash.fdir.hi = filter_id - 1; pkt_flags |= PKT_RX_FDIR_ID; } } -- 2.20.1