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Date: Thu, 12 Nov 2020 13:24:39 -0800
From: Alexander Duyck <alexander.duyck@...il.com>
To: Naveen Mamindlapalli <naveenm@...vell.com>
Cc: Netdev <netdev@...r.kernel.org>,
LKML <linux-kernel@...r.kernel.org>,
Jakub Kicinski <kuba@...nel.org>,
David Miller <davem@...emloft.net>, saeed@...nel.org,
sgoutham@...vell.com, lcherian@...vell.com, gakula@...vell.com,
jerinj@...vell.com, sbhatta@...vell.com, hkelam@...vell.com
Subject: Re: [PATCH v3 net-next 03/13] octeontx2-af: Generate key field bit
mask from KEX profile
On Tue, Nov 10, 2020 at 11:24 PM Naveen Mamindlapalli
<naveenm@...vell.com> wrote:
>
> From: Subbaraya Sundeep <sbhatta@...vell.com>
>
> Key Extraction(KEX) profile decides how the packet metadata such as
> layer information and selected packet data bytes at each layer are
> placed in MCAM search key. This patch reads the configured KEX profile
> parameters to find out the bit position and bit mask for each field.
> The information is used when programming the MCAM match data by SW
> to match a packet flow and take appropriate action on the flow. This
> patch also verifies the mandatory fields such as channel and DMAC
> are not overwritten by the KEX configuration of other fields.
>
> Signed-off-by: Subbaraya Sundeep <sbhatta@...vell.com>
> Signed-off-by: Sunil Goutham <sgoutham@...vell.com>
> Signed-off-by: Naveen Mamindlapalli <naveenm@...vell.com>
A few minor spelling issues, otherwise it looks fine.
Reviewed-by: Alexander Duyck <alexanderduyck@...com>
> ---
> drivers/net/ethernet/marvell/octeontx2/af/Makefile | 2 +-
> drivers/net/ethernet/marvell/octeontx2/af/npc.h | 48 ++
> drivers/net/ethernet/marvell/octeontx2/af/rvu.h | 38 ++
> .../net/ethernet/marvell/octeontx2/af/rvu_npc.c | 11 +-
> .../net/ethernet/marvell/octeontx2/af/rvu_npc_fs.c | 562 +++++++++++++++++++++
> 5 files changed, 658 insertions(+), 3 deletions(-)
> create mode 100644 drivers/net/ethernet/marvell/octeontx2/af/rvu_npc_fs.c
>
> diff --git a/drivers/net/ethernet/marvell/octeontx2/af/Makefile b/drivers/net/ethernet/marvell/octeontx2/af/Makefile
> index 2f7a861d0c7b..ffc681b67f1c 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/af/Makefile
> +++ b/drivers/net/ethernet/marvell/octeontx2/af/Makefile
> @@ -9,4 +9,4 @@ obj-$(CONFIG_OCTEONTX2_AF) += octeontx2_af.o
>
> octeontx2_mbox-y := mbox.o rvu_trace.o
> octeontx2_af-y := cgx.o rvu.o rvu_cgx.o rvu_npa.o rvu_nix.o \
> - rvu_reg.o rvu_npc.o rvu_debugfs.o ptp.o
> + rvu_reg.o rvu_npc.o rvu_debugfs.o ptp.o rvu_npc_fs.o
> diff --git a/drivers/net/ethernet/marvell/octeontx2/af/npc.h b/drivers/net/ethernet/marvell/octeontx2/af/npc.h
> index 91a9d00e4fb5..0fe47216f771 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/af/npc.h
> +++ b/drivers/net/ethernet/marvell/octeontx2/af/npc.h
> @@ -140,6 +140,54 @@ enum npc_kpu_lh_ltype {
> NPC_LT_LH_CUSTOM1 = 0xF,
> };
>
> +/* list of known and supported fields in packet header and
> + * fields present in key structure.
> + */
> +enum key_fields {
> + NPC_DMAC,
> + NPC_SMAC,
> + NPC_ETYPE,
> + NPC_OUTER_VID,
> + NPC_TOS,
> + NPC_SIP_IPV4,
> + NPC_DIP_IPV4,
> + NPC_SIP_IPV6,
> + NPC_DIP_IPV6,
> + NPC_SPORT_TCP,
> + NPC_DPORT_TCP,
> + NPC_SPORT_UDP,
> + NPC_DPORT_UDP,
> + NPC_SPORT_SCTP,
> + NPC_DPORT_SCTP,
> + NPC_HEADER_FIELDS_MAX,
> + NPC_CHAN = NPC_HEADER_FIELDS_MAX, /* Valid when Rx */
> + NPC_PF_FUNC, /* Valid when Tx */
> + NPC_ERRLEV,
> + NPC_ERRCODE,
> + NPC_LXMB,
> + NPC_LA,
> + NPC_LB,
> + NPC_LC,
> + NPC_LD,
> + NPC_LE,
> + NPC_LF,
> + NPC_LG,
> + NPC_LH,
> + /* ether type for untagged frame */
> + NPC_ETYPE_ETHER,
> + /* ether type for single tagged frame */
> + NPC_ETYPE_TAG1,
> + /* ether type for double tagged frame */
> + NPC_ETYPE_TAG2,
> + /* outer vlan tci for single tagged frame */
> + NPC_VLAN_TAG1,
> + /* outer vlan tci for double tagged frame */
> + NPC_VLAN_TAG2,
> + /* other header fields programmed to extract but not of our interest */
> + NPC_UNKNOWN,
> + NPC_KEY_FIELDS_MAX,
> +};
> +
> struct npc_kpu_profile_cam {
> u8 state;
> u8 state_mask;
> diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
> index 1724dbd18847..7e556c7b6ccf 100644
> --- a/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
> +++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu.h
> @@ -15,6 +15,7 @@
> #include "rvu_struct.h"
> #include "common.h"
> #include "mbox.h"
> +#include "npc.h"
>
> /* PCI device IDs */
> #define PCI_DEVID_OCTEONTX2_RVU_AF 0xA065
> @@ -105,6 +106,36 @@ struct nix_mce_list {
> int max;
> };
>
> +/* layer meta data to uniquely identify a packet header field */
s/meta data/metadata/
> +struct npc_layer_mdata {
> + u8 lid;
> + u8 ltype;
> + u8 hdr;
> + u8 key;
> + u8 len;
> +};
> +
<snip>
> + /* Handle header fields which can come from multiple layers like
> + * etype, outer vlan tci. These fields should have same position in
> + * the key otherwise to install a mcam rule more than one entry is
> + * needed which complicates mcam space management.
> + */
> + etype_ether = &key_fields[NPC_ETYPE_ETHER];
> + etype_tag1 = &key_fields[NPC_ETYPE_TAG1];
> + etype_tag2 = &key_fields[NPC_ETYPE_TAG2];
> + vlan_tag1 = &key_fields[NPC_VLAN_TAG1];
> + vlan_tag2 = &key_fields[NPC_VLAN_TAG2];
> +
> + /* if key profile programmed does not extract ether type at all */
s/ether type/Ethertype/
> + if (!etype_ether->nr_kws && !etype_tag1->nr_kws && !etype_tag2->nr_kws)
> + goto vlan_tci;
> +
> + /* if key profile programmed extracts ether type from one layer */
Same issue here and a few other places, replace "ether type" with "Ethertype".
> + if (etype_ether->nr_kws && !etype_tag1->nr_kws && !etype_tag2->nr_kws)
> + key_fields[NPC_ETYPE] = *etype_ether;
> + if (!etype_ether->nr_kws && etype_tag1->nr_kws && !etype_tag2->nr_kws)
> + key_fields[NPC_ETYPE] = *etype_tag1;
> + if (!etype_ether->nr_kws && !etype_tag1->nr_kw
>
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