Message-ID: <CAA=kqW++FYvBfWU8c111pdYVFJk5=rhF5R5_N+wk5uUs=3fo=g@mail.gmail.com>
Date: Tue, 24 Dec 2024 18:20:38 +0530
From: sai kumar <skmr537@...il.com>
To: Vladimir Oltean <olteanv@...il.com>
Cc: netdev@...r.kernel.org
Subject: Re: DSA Switch: query: Switch configuration, data plane doesn't work
 whereas control plane works

Thanks Vladimir for your inputs.

I tried checking the statistics, the in_broadcasts count increases
with respect to client dhcp discover broadcasts.
But the same is not happening with external cpu port eth1, the eth1
in_broadcasts and in_accepted are 0 , Observing the rx frame errors on
eth1 but
this count doesn't match to the clients broadcast packets count.

ethtool -S lan1
NIC statistics:
     tx_packets: 7
     tx_bytes: 626
     rx_packets: 0
     rx_bytes: 0
     in_good_octets: 18112
     in_bad_octets: 0
     in_unicast: 0
     in_broadcasts: 51
     in_multicasts: 5
     in_pause: 0
     in_undersize: 0
     in_fragments: 0
     in_oversize: 0
     in_jabber: 0
     in_rx_error: 0
     in_fcs_error: 0
     out_octets: 7792
     out_unicast: 0
     out_broadcasts: 105
     out_multicasts: 12
     out_pause: 0
     excessive: 0
     collisions: 0
     deferred: 0
     single: 0
     multiple: 0
     out_fcs_error: 0
     late: 0
     hist_64bytes: 105
     hist_65_127bytes: 17
     hist_128_255bytes: 0
     hist_256_511bytes: 51
     hist_512_1023bytes: 0
     hist_1024_max_bytes: 0
     in_discards: 0
     in_filtered: 0
     in_accepted: 56
     in_bad_accepted: 0
     in_good_avb_class_a: 0
     in_good_avb_class_b: 0
     in_bad_avb_class_a: 0
     in_bad_avb_class_b: 0
     tcam_counter_0: 0
     tcam_counter_1: 0
     tcam_counter_2: 0
     tcam_counter_3: 0
     in_da_unknown: 5
     in_management: 4
     out_queue_0: 117
     out_queue_1: 0
     out_queue_2: 0
     out_queue_3: 0
     out_queue_4: 0
     out_queue_5: 0
     out_queue_6: 0
     out_queue_7: 0
     out_cut_through: 0
     out_octets_a: 0
     out_octets_b: 0
     out_management: 0
     atu_member_violation: 0
     atu_miss_violation: 0
     atu_full_violation: 0
     vtu_member_violation: 0
     vtu_miss_violation: 0


ethtool -S eth1
NIC statistics:
     interrupts [CPU 0]: 12
     interrupts [CPU 1]: 9
     interrupts [CPU 2]: 5
     interrupts [CPU 3]: 7
     interrupts [TOTAL]: 33
     rx packets [CPU 0]: 0
     rx packets [CPU 1]: 0
     rx packets [CPU 2]: 0
     rx packets [CPU 3]: 0
     rx packets [TOTAL]: 0
     tx packets [CPU 0]: 2
     tx packets [CPU 1]: 0
     tx packets [CPU 2]: 12
     tx packets [CPU 3]: 0
     tx packets [TOTAL]: 14
     tx recycled [CPU 0]: 0
     tx recycled [CPU 1]: 0
     tx recycled [CPU 2]: 0
     tx recycled [CPU 3]: 0
     tx recycled [TOTAL]: 0
     tx confirm [CPU 0]: 6
     tx confirm [CPU 1]: 3
     tx confirm [CPU 2]: 2
     tx confirm [CPU 3]: 3
     tx confirm [TOTAL]: 14
     tx S/G [CPU 0]: 0
     tx S/G [CPU 1]: 0
     tx S/G [CPU 2]: 0
     tx S/G [CPU 3]: 0
     tx S/G [TOTAL]: 0
     rx S/G [CPU 0]: 0
     rx S/G [CPU 1]: 0
     rx S/G [CPU 2]: 0
     rx S/G [CPU 3]: 0
     rx S/G [TOTAL]: 0
     tx error [CPU 0]: 0
     tx error [CPU 1]: 0
     tx error [CPU 2]: 0
     tx error [CPU 3]: 0
     tx error [TOTAL]: 0
     rx error [CPU 0]: 6
     rx error [CPU 1]: 6
     rx error [CPU 2]: 3
     rx error [CPU 3]: 4
     rx error [TOTAL]: 19
     bp count [CPU 0]: 128
     bp count [CPU 1]: 128
     bp count [CPU 2]: 128
     bp count [CPU 3]: 128
     bp count [TOTAL]: 512
     rx dma error: 0
     rx frame physical error: 2
     rx frame size error: 17
     rx header error: 0
     rx csum error: 0
     qman cg_tdrop: 0
     qman wred: 0
     qman error cond: 0
     qman early window: 0
     qman late window: 0
     qman fq tdrop: 0
     qman fq retired: 0
     qman orp disabled: 0
     congestion time (ms): 0
     entered congestion: 0
     congested (0/1): 0
     p00_in_good_octets: 0
     p00_in_bad_octets: 2
     p00_in_unicast: 0
     p00_in_broadcasts: 0
     p00_in_multicasts: 0
     p00_in_pause: 0
     p00_in_undersize: 0
     p00_in_fragments: 0
     p00_in_oversize: 0
     p00_in_jabber: 0
     p00_in_rx_error: 1
     p00_in_fcs_error: 0
     p00_out_octets: 45440
     p00_out_unicast: 0
     p00_out_broadcasts: 312
     p00_out_multicasts: 63
     p00_out_pause: 0
     p00_excessive: 0
     p00_collisions: 0
     p00_deferred: 0
     p00_single: 0
     p00_multiple: 0
     p00_out_fcs_error: 0
     p00_late: 0
     p00_hist_64bytes: 0
     p00_hist_65_127bytes: 306
     p00_hist_128_255bytes: 8
     p00_hist_256_511bytes: 61
     p00_hist_512_1023bytes: 0
     p00_hist_1024_max_bytes: 0
     p00_in_discards: 0
     p00_in_filtered: 0
     p00_in_accepted: 0
     p00_in_bad_accepted: 0
     p00_in_good_avb_class_a: 0
     p00_in_good_avb_class_b: 0
     p00_in_bad_avb_class_a: 0
     p00_in_bad_avb_class_b: 0
     p00_tcam_counter_0: 0
     p00_tcam_counter_1: 0
     p00_tcam_counter_2: 0
     p00_tcam_counter_3: 0
     p00_in_da_unknown: 0
     p00_in_management: 0
     p00_out_queue_0: 373
     p00_out_queue_1: 0
     p00_out_queue_2: 0
     p00_out_queue_3: 0
     p00_out_queue_4: 0
     p00_out_queue_5: 0
     p00_out_queue_6: 2
     p00_out_queue_7: 0
     p00_out_cut_through: 0
     p00_out_octets_a: 0
     p00_out_octets_b: 0
     p00_out_management: 11
     p00_atu_member_violation: 0
     p00_atu_miss_violation: 0
     p00_atu_full_violation: 0
     p00_vtu_member_violation: 0
     p00_vtu_miss_violation: 0


On Tue, Dec 24, 2024 at 5:30 PM Vladimir Oltean <olteanv@...il.com> wrote:
>
> On Tue, Dec 24, 2024 at 03:00:17PM +0530, sai kumar wrote:
> > Hi Team,
> >
> > This could be basic question related to DSA, if possible please help
> > to share your feedback,. Thanks.
> >
> >
> > External CPU eth1 ---RGMII---- Switch Port 0 (cpu port)
> > Switch Port 1 (lan1) --- DHCP client
> >
> > I am using marvell 88E6390 evaluation board, modified the device tree
> > to support MDIO control over USB.
> > The switch control plane works, we are unable to dump registers and
>
> unable -> able, right?
[SK] Yes, typo it was able.
>
> > see port status.
> >
> > The kernel version on board with external cpu is 6.1
> >
> > I have connected a dhcp client to port 1 of the switch and the
> > discover packet is not reaching the cpu port (port 0) and external cpu
> > interface eth1.
> > Using the bridge without vlan to configure, able to see the client
> > device mac addr in bridge fdb show
> > with vlan id as 4095.
> >
> > tcpdump on external cpu port eth1 and bridge br0 to listen for
> > incoming packets from the client . No discover packets are being
> > received on those interfaces.
> >
> > Could you please let us know if any configuration is being missed for
> > switch data plane to work ? Thanks.
> >
> >
> > The below are the commands used to configure the bridge:
>
> I don't immediately see something obviously wrong. Could you run
> ethtool -S on lan1 and on eth0, and try to find a positive correlation
> between the DHCP requests and a certain packet counter incrementing in
> the switch? We should determine whether there is packet loss in the
> switch or whether there is some other reason for the lack of connectivity.

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