Re: sky2 PHY setup

From: Rob Sims
Date: Sat Apr 07 2007 - 13:54:35 EST

On Wed, Apr 04, 2007 at 11:19:30AM -0700, Stephen Hemminger wrote:
> On Mon, 26 Mar 2007 21:24:06 -0600
> Rob Sims <lkml-z@xxxxxxxxxxx> wrote:
>
> > On Fri, Mar 16, 2007 at 02:16:48PM -0700, Stephen Hemminger wrote:

> > > Use ethtool -S to if there are any pause frames, etc. See if frames are
> > > still making it into PHY statistics but not being received.
> > >
> > > Use ethtool -d to dump registers. Need current version of ethtool with decode logic.
> > >
> > > Then look for things like is Ram buffer read/write pointer changing?
> > >
> > > Is GMAC stuck in pause:
> > >
> > > Normal is:
> > > GMAC 1
> > > Status 0x5010 (see GM_GPSR_XXX in sky2.h)
> > > Control 0x1800
> > >
> > > Stuck is
> > > GMAC 1
> > > Status 0x5810 (or 0x5A10)
> >
> > First, here's the described hang in action, on the Core2 Duo on a 1Gb
> > hub:
> > GMAC 1 Status/Control remains at 0x5010/0x1800 until module is removed.
> > Read/write buffer pointers are changing. Full ethtool output in
> > http://www.robsims.com/sky2.netmon.log.gz
> >
> > This machine was also having major throughput problems - 17 kB/s.
> > Rebooting brought it to ~ 20 MB/s. Booting into a kernel with the
> > proprietary sk98lin kernel module showed ~ 80MB/s. Finally, returning
> > to sky2 gave 117 MB/s. Tests run using netcat, dd, /dev/zero, and
> > /dev/null, transmitting from the problem box to an e1000 via a Netgear
> > GS108. No hangs were observed during the "load test."
>
> The vendor driver does not do hardware flow control correctly. It ignores
> Tx pause frames.

> Were you using Jumbo MTU?

No - 1500.

> You might have over run the hub and it wedged. Try doing:
> ethtool -r eth0
> that forces a down/up

I'm still seeing throughput drop to under 1 Mb/s (50-100kB/s)
periodically. I did an ethtool -S and ethtool -d to capture state.
(sky2-fail.log). I ran ethtool -r and retested; no change
(sky2-ethtool-r.log). Finally, ifdown - rmmod - modprobe - ifup, which
restored to Gigabit speeds (96+ MB/s), (sky2-modcycle.log).

Please let me know if there's anything else I can poke into. As a
reminder, this is a 88E8053 r20. Next time I see a degradation, I'll
try cycling the switch.
--
Rob
NIC statistics:
tx_bytes: 84771583
rx_bytes: 94680579
tx_broadcast: 3
rx_broadcast: 1356
tx_multicast: 655
rx_multicast: 22
tx_unicast: 173780
rx_unicast: 181842
tx_mac_pause: 0
rx_mac_pause: 0
collisions: 0
late_collision: 0
aborted: 0
single_collisions: 0
multi_collisions: 0
rx_short: 0
rx_runt: 0
rx_64_byte_packets: 2360
rx_65_to_127_byte_packets: 82349
rx_128_to_255_byte_packets: 35420
rx_256_to_511_byte_packets: 8584
rx_512_to_1023_byte_packets: 3734
rx_1024_to_1518_byte_packets: 50773
rx_1518_to_max_byte_packets: 0
rx_too_long: 0
rx_fifo_overflow: 0
rx_jabber: 0
rx_fcs_error: 0
tx_64_byte_packets: 1744
tx_65_to_127_byte_packets: 102366
tx_128_to_255_byte_packets: 19607
tx_256_to_511_byte_packets: 8735
tx_512_to_1023_byte_packets: 4438
tx_1024_to_1518_byte_packets: 31033
tx_1519_to_max_byte_packets: 0
tx_fifo_underrun: 0

PCI config
----------
00: ab 11 62 43 07 00 10 00 20 00 00 02 04 00 00 00
10: 04 c0 9f fa 00 00 00 00 01 c8 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 43 10 42 81
30: 00 00 9c fa 48 00 00 00 00 00 00 00 05 01 00 00
40: 00 00 f0 01 00 80 a0 01 01 50 02 fe 00 20 00 13
50: 03 5c fc 80 00 00 00 01 00 00 00 01 05 e0 82 00
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70: 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Control Registers
-----------------
Register Access Port 0x00
LED Control/Status 0xA603164A
Interrupt Source 0x00000000
Interrupt Mask 0xC000001D
Interrupt Hardware Error Source 0x00000000
Interrupt Hardware Error Mask 0x2E003F3F

Bus Management Unit
-------------------
CSR Receive Queue 1 0x00010000
CSR Sync Queue 1 0xFFFFFFFF
CSR Async Queue 1 0x00000000

MAC Addresses
---------------
Addr 1 00 1A 92 23 52 4D
Addr 2 00 1A 92 23 52 4D
Addr 3 00 00 00 00 00 00

Connector type 0x4A (J)
PMD type 0x31 (1)
PHY type 0x80
Chip Id 0xB6 Yukon-2 EC (rev 0)
Ram Buffer 0x0C

Status BMU:
-----------
Control 0x0002220A
Last Index 0x07FF
Put Index 0x025F
List Address 0x0000000012760000
Transmit 1 done index 0x0118
Transmit index threshold 0x000A

Status FIFO
Write Pointer 0x16
Read Pointer 0x16
Level 0x00
Watermark 0x10
ISR Watermark 0x10
Status level
Init 0x000030D4 Value 0x000030D4
Test 0x04 Control 0x02
TX status
Init 0x0001E848 Value 0x0001E848
Test 0x04 Control 0x02
ISR
Init 0x000009C4 Value 0x000009C4
Test 0x04 Control 0x02

GMAC control 0x005A
GPHY control 0x2002
LINK control 0x02

GMAC 1
Status 0x5010
Control 0x1800
Transmit 0x1000
Receive 0xE000
Transmit flow control 0xFFFF
Transmit parameter 0xD7C4
Serial mode 0x221E
Source address: 00 1A 92 23 52 4D
Physical address: 00 1A 92 23 52 4D

Rx GMAC 1
End Address 0x0000007F
Almost Full Thresh 0x00000070
Control/Test 0x0900228A
FIFO Flush Mask 0x0000187B
FIFO Flush Threshold 0x0000000B
Truncation Threshold 0x0000017C
Upper Pause Threshold 0x00000000
Lower Pause Threshold 0x00000081
VLAN Tag 0x00000007
FIFO Write Pointer 0x00000000
FIFO Write Level 0x00000000
FIFO Read Pointer 0x00000000
FIFO Read Level 0x00000007

Tx GMAC 1
End Address 0x0000007F
Almost Full Thresh 0x00000010
Control/Test 0x0102220A
FIFO Flush Mask 0x00000000
FIFO Flush Threshold 0x00000000
Truncation Threshold 0x00000000
Upper Pause Threshold 0x00000000
Lower Pause Threshold 0x00000081
VLAN Tag 0x00000046
FIFO Write Pointer 0x00000046
FIFO Write Level 0x00000F0F
FIFO Read Pointer 0x00000000
FIFO Read Level 0x00000046

Receive Queue 1
---------------
Buffer control 0x05F8
Byte Counter 49408
Descriptor Address 0x00000000324C5010
Status 0x00720100
Timestamp 0x7920F1B4
BMU Control/Status 0x000061AA
Done 0x0000
Request 0x00000000324C5010
Csum1 Offset 8572 Position 14
Csum2 Offset 8572 Position 14

Sync Transmit Queue 1 (disabled)

Async Transmit Queue 1
---------------
Buffer control 0x0030
Byte Counter 49438
Descriptor Address 0x0000000015DD2CE7
Status 0x00000000
Timestamp 0x00010000
BMU Control/Status 0x800011AA
Done 0x0000
Request 0x0000000015DD2D17
Csum Start 0x0032 Pos 0 Write 0

Receive RAMbuffer 1
---------------
Start Address 0x00000000
End Address 0x00000E7F
Write Pointer 0x00000187
Read Pointer 0x00000187
Upper Threshold/Pause Packets 0x00000D80
Lower Threshold/Pause Packets 0x000003A0
Upper Threshold/High Priority 0x00000AE0
Lower Threshold/High Priority 0x00000740
Packet Counter 0x00000000
Level 0x00000000
Control 0x0002221A

Sync Transmit RAMbuffer 1 (disabled)

Async Transmit RAMbuffer 1
---------------
Start Address 0x00000E80
End Address 0x000017FF
Write Pointer 0x000015C6
Read Pointer 0x000015C6
Packet Counter 0x00000000
Level 0x00000000
Control 0x0002222A
NIC statistics:
tx_bytes: 87827569
rx_bytes: 95371155
tx_broadcast: 3
rx_broadcast: 1359
tx_multicast: 655
rx_multicast: 22
tx_unicast: 176221
rx_unicast: 184113
tx_mac_pause: 0
rx_mac_pause: 0
collisions: 0
late_collision: 0
aborted: 0
single_collisions: 0
multi_collisions: 0
rx_short: 0
rx_runt: 0
rx_64_byte_packets: 2366
rx_65_to_127_byte_packets: 84081
rx_128_to_255_byte_packets: 35584
rx_256_to_511_byte_packets: 8599
rx_512_to_1023_byte_packets: 3746
rx_1024_to_1518_byte_packets: 51118
rx_1518_to_max_byte_packets: 0
rx_too_long: 0
rx_fifo_overflow: 0
rx_jabber: 0
rx_fcs_error: 0
tx_64_byte_packets: 1749
tx_65_to_127_byte_packets: 102951
tx_128_to_255_byte_packets: 19765
tx_256_to_511_byte_packets: 8744
tx_512_to_1023_byte_packets: 4444
tx_1024_to_1518_byte_packets: 32415
tx_1519_to_max_byte_packets: 0
tx_fifo_underrun: 0

PCI config
----------
00: ab 11 62 43 07 00 10 00 20 00 00 02 04 00 00 00
10: 04 c0 9f fa 00 00 00 00 01 c8 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 43 10 42 81
30: 00 00 9c fa 48 00 00 00 00 00 00 00 05 01 00 00
40: 00 00 f0 01 00 80 a0 01 01 50 02 fe 00 20 00 13
50: 03 5c fc 80 00 00 00 01 00 00 00 01 05 e0 82 00
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70: 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Control Registers
-----------------
Register Access Port 0x00
LED Control/Status 0xA603164A
Interrupt Source 0x00000000
Interrupt Mask 0xC000001D
Interrupt Hardware Error Source 0x00000000
Interrupt Hardware Error Mask 0x2E003F3F

Bus Management Unit
-------------------
CSR Receive Queue 1 0x00010000
CSR Sync Queue 1 0xFFFFFFFF
CSR Async Queue 1 0x00000000

MAC Addresses
---------------
Addr 1 00 1A 92 23 52 4D
Addr 2 00 1A 92 23 52 4D
Addr 3 00 00 00 00 00 00

Connector type 0x4A (J)
PMD type 0x31 (1)
PHY type 0x80
Chip Id 0xB6 Yukon-2 EC (rev 0)
Ram Buffer 0x0C

Status BMU:
-----------
Control 0x0002220A
Last Index 0x07FF
Put Index 0x022D
List Address 0x0000000012760000
Transmit 1 done index 0x00FC
Transmit index threshold 0x000A

Status FIFO
Write Pointer 0x2E
Read Pointer 0x2E
Level 0x00
Watermark 0x10
ISR Watermark 0x10
Status level
Init 0x000030D4 Value 0x000030D4
Test 0x04 Control 0x02
TX status
Init 0x0001E848 Value 0x0001E848
Test 0x04 Control 0x02
ISR
Init 0x000009C4 Value 0x000009C4
Test 0x04 Control 0x02

GMAC control 0x005A
GPHY control 0x2002
LINK control 0x02

GMAC 1
Status 0x5010
Control 0x1800
Transmit 0x1000
Receive 0xE000
Transmit flow control 0xFFFF
Transmit parameter 0xD7C4
Serial mode 0x221E
Source address: 00 1A 92 23 52 4D
Physical address: 00 1A 92 23 52 4D

Rx GMAC 1
End Address 0x0000007F
Almost Full Thresh 0x00000070
Control/Test 0x0900228A
FIFO Flush Mask 0x0000187B
FIFO Flush Threshold 0x0000000B
Truncation Threshold 0x0000017C
Upper Pause Threshold 0x00000000
Lower Pause Threshold 0x00000081
VLAN Tag 0x00000040
FIFO Write Pointer 0x00000000
FIFO Write Level 0x00000000
FIFO Read Pointer 0x00000000
FIFO Read Level 0x00000040

Tx GMAC 1
End Address 0x0000007F
Almost Full Thresh 0x00000010
Control/Test 0x0102220A
FIFO Flush Mask 0x00000000
FIFO Flush Threshold 0x00000000
Truncation Threshold 0x00000000
Upper Pause Threshold 0x00000000
Lower Pause Threshold 0x00000081
VLAN Tag 0x00000008
FIFO Write Pointer 0x00000008
FIFO Write Level 0x00000F0F
FIFO Read Pointer 0x00000000
FIFO Read Level 0x00000008

Receive Queue 1
---------------
Buffer control 0x05F8
Byte Counter 49408
Descriptor Address 0x0000000005BB9810
Status 0x00720100
Timestamp 0x7920F1B4
BMU Control/Status 0x000061AA
Done 0x0000
Request 0x0000000005BB9810
Csum1 Offset 8572 Position 14
Csum2 Offset 8572 Position 14

Sync Transmit Queue 1 (disabled)

Async Transmit Queue 1
---------------
Buffer control 0x0030
Byte Counter 49438
Descriptor Address 0x0000000002A78257
Status 0x00000000
Timestamp 0x00010000
BMU Control/Status 0x800011AA
Done 0x0000
Request 0x0000000002A78287
Csum Start 0x0032 Pos 0 Write 0

Receive RAMbuffer 1
---------------
Start Address 0x00000000
End Address 0x00000E7F
Write Pointer 0x00000AC0
Read Pointer 0x00000AC0
Upper Threshold/Pause Packets 0x00000D80
Lower Threshold/Pause Packets 0x000003A0
Upper Threshold/High Priority 0x00000AE0
Lower Threshold/High Priority 0x00000740
Packet Counter 0x00000000
Level 0x00000000
Control 0x0002221A

Sync Transmit RAMbuffer 1 (disabled)

Async Transmit RAMbuffer 1
---------------
Start Address 0x00000E80
End Address 0x000017FF
Write Pointer 0x00001788
Read Pointer 0x00001788
Packet Counter 0x00000000
Level 0x00000000
Control 0x0002222A
NIC statistics:
tx_bytes: 3173910
rx_bytes: 111677
tx_broadcast: 4
rx_broadcast: 1
tx_multicast: 17
rx_multicast: 0
tx_unicast: 2254
rx_unicast: 1451
tx_mac_pause: 0
rx_mac_pause: 0
collisions: 0
late_collision: 0
aborted: 0
single_collisions: 0
multi_collisions: 0
rx_short: 0
rx_runt: 0
rx_64_byte_packets: 5
rx_65_to_127_byte_packets: 1413
rx_128_to_255_byte_packets: 24
rx_256_to_511_byte_packets: 4
rx_512_to_1023_byte_packets: 6
rx_1024_to_1518_byte_packets: 0
rx_1518_to_max_byte_packets: 0
rx_too_long: 0
rx_fifo_overflow: 0
rx_jabber: 0
rx_fcs_error: 0
tx_64_byte_packets: 6
tx_65_to_127_byte_packets: 92
tx_128_to_255_byte_packets: 63
tx_256_to_511_byte_packets: 27
tx_512_to_1023_byte_packets: 23
tx_1024_to_1518_byte_packets: 2064
tx_1519_to_max_byte_packets: 0
tx_fifo_underrun: 0

PCI config
----------
00: ab 11 62 43 07 00 10 00 20 00 00 02 04 00 00 00
10: 04 c0 9f fa 00 00 00 00 01 c8 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 43 10 42 81
30: 00 00 9c fa 48 00 00 00 00 00 00 00 05 01 00 00
40: 00 00 f0 01 00 80 a0 01 01 50 02 fe 00 20 00 13
50: 03 5c fc 80 00 00 00 01 00 00 00 01 05 e0 82 00
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70: 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00

Control Registers
-----------------
Register Access Port 0x00
LED Control/Status 0xA603164A
Interrupt Source 0x00000000
Interrupt Mask 0xC000001D
Interrupt Hardware Error Source 0x00000000
Interrupt Hardware Error Mask 0x2E003F3F

Bus Management Unit
-------------------
CSR Receive Queue 1 0x00010000
CSR Sync Queue 1 0xFFFFFFFF
CSR Async Queue 1 0x00000000

MAC Addresses
---------------
Addr 1 00 1A 92 23 52 4D
Addr 2 00 1A 92 23 52 4D
Addr 3 00 00 00 00 00 00

Connector type 0x4A (J)
PMD type 0x31 (1)
PHY type 0x80
Chip Id 0xB6 Yukon-2 EC (rev 0)
Ram Buffer 0x0C

Status BMU:
-----------
Control 0x0002220A
Last Index 0x07FF
Put Index 0x065B
List Address 0x0000000012760000
Transmit 1 done index 0x01AF
Transmit index threshold 0x000A

Status FIFO
Write Pointer 0x16
Read Pointer 0x16
Level 0x00
Watermark 0x10
ISR Watermark 0x10
Status level
Init 0x000030D4 Value 0x000030D4
Test 0x04 Control 0x02
TX status
Init 0x0001E848 Value 0x0001E848
Test 0x04 Control 0x02
ISR
Init 0x000009C4 Value 0x000009C4
Test 0x04 Control 0x02

GMAC control 0x005A
GPHY control 0x2002
LINK control 0x02

GMAC 1
Status 0x5010
Control 0x1800
Transmit 0x1000
Receive 0xE000
Transmit flow control 0xFFFF
Transmit parameter 0xD7C4
Serial mode 0x221E
Source address: 00 1A 92 23 52 4D
Physical address: 00 1A 92 23 52 4D

Rx GMAC 1
End Address 0x0000007F
Almost Full Thresh 0x00000070
Control/Test 0x0900228A
FIFO Flush Mask 0x0000187B
FIFO Flush Threshold 0x0000000B
Truncation Threshold 0x0000017C
Upper Pause Threshold 0x00000000
Lower Pause Threshold 0x00000081
VLAN Tag 0x00000033
FIFO Write Pointer 0x00000000
FIFO Write Level 0x00000000
FIFO Read Pointer 0x00000000
FIFO Read Level 0x00000033

Tx GMAC 1
End Address 0x0000007F
Almost Full Thresh 0x00000010
Control/Test 0x0102220A
FIFO Flush Mask 0x00000000
FIFO Flush Threshold 0x00000000
Truncation Threshold 0x00000000
Upper Pause Threshold 0x00000000
Lower Pause Threshold 0x00000081
VLAN Tag 0x0000007A
FIFO Write Pointer 0x0000007A
FIFO Write Level 0x00000F0F
FIFO Read Pointer 0x00000000
FIFO Read Level 0x0000007A

Receive Queue 1
---------------
Buffer control 0x05F8
Byte Counter 49408
Descriptor Address 0x0000000036A60010
Status 0x00420100
Timestamp 0x7920F1B4
BMU Control/Status 0x000061AA
Done 0x0000
Request 0x0000000036A60010
Csum1 Offset 20860 Position 14
Csum2 Offset 20860 Position 14

Sync Transmit Queue 1 (disabled)

Async Transmit Queue 1
---------------
Buffer control 0x0030
Byte Counter 49438
Descriptor Address 0x0000000026F315A7
Status 0x000005EA
Timestamp 0x00010000
BMU Control/Status 0x800011AA
Done 0x0000
Request 0x0000000026F315D7
Csum Start 0x0032 Pos 0 Write 0

Receive RAMbuffer 1
---------------
Start Address 0x00000000
End Address 0x00000E7F
Write Pointer 0x00000E33
Read Pointer 0x00000E33
Upper Threshold/Pause Packets 0x00000D80
Lower Threshold/Pause Packets 0x000003A0
Upper Threshold/High Priority 0x00000AE0
Lower Threshold/High Priority 0x00000740
Packet Counter 0x00000000
Level 0x00000000
Control 0x0002221A

Sync Transmit RAMbuffer 1 (disabled)

Async Transmit RAMbuffer 1
---------------
Start Address 0x00000E80
End Address 0x000017FF
Write Pointer 0x0000137A
Read Pointer 0x0000137A
Packet Counter 0x00000000
Level 0x00000000
Control 0x0002222A

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