Re: [PATCH] forcedeth: TX handler changes (experimental)

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Hi,

Manfred Spraul wrote:
Attached is a patch that modifies the tx interrupt handling of the nForce nic. It's part of the attempts to figure out what causes the nic hangs (see bug 4552). The change is experimental: It affects all nForce versions. I've tested it on my nForce 250-Gb.
Please test it. And especially: If you experince a nic hang, please send me the debug output. That's the block starting with 

<<
NETDEV WATCHDOG: eth1: transmit timed out
eth1: Got tx_timeout. irq: 00000000
eth1: Ring at  ...
<<
After applying the v0.38 patch, I can't get any network at all. DHCP fails to get an IP. v0.37 works fine.
I enabled debugging, and I get this failure for every packet being transmitted: ( i masked out part of my MAC addr with XX ) 

Jul 16 20:06:28 dsd eth0: nv_start_xmit: packet packet 3 queued for transmission.
Jul 16 20:06:28 dsd
Jul 16 20:06:28 dsd 000: ff ff ff ff ff ff 00 50 8d XX XX XX 08 00 45 00
Jul 16 20:06:28 dsd 010: 02 40 75 a0 00 00 40 11 03 0e 00 00 00 00 ff ff
Jul 16 20:06:28 dsd 020: ff ff 00 44 00 43 02 2c 13 0a 01 01 06 00 d2 76
Jul 16 20:06:28 dsd 030: bc 10 00 0a 00 00 00 00 00 00 00 00 00 00 00 00
Jul 16 20:06:28 dsd eth0: nv_nic_irq
Jul 16 20:06:28 dsd eth0: irq: 00000008
Jul 16 20:06:28 dsd eth0: nv_tx_done: looking at packet 3, Flags 0x6000024d.
Jul 16 20:06:28 dsd eth0: received irq with events 0x8. Probably TX fail.
Jul 16 20:06:28 dsd eth0: irq: 00000000
Jul 16 20:06:28 dsd eth0: nv_nic_irq completed

My hardware:

0000:00:04.0 Class 0200: 10de:0066 (rev a1)
0000:00:04.0 Ethernet controller: nVidia Corporation nForce2 Ethernet Controller (rev a1) 
        Subsystem: ABIT Computer Corp.: Unknown device 1c00
        Flags: bus master, 66Mhz, fast devsel, latency 0, IRQ 17
        Memory at e0087000 (32-bit, non-prefetchable) [size=4K]
        I/O ports at b000 [size=8]
        Capabilities: [44] Power Management version 2

Here's the start of the logs:
Jul 16 20:05:27 dsd forcedeth.c: Reverse Engineered nForce ethernet driver. Version 0.38. Jul 16 20:05:27 dsd ACPI: PCI Interrupt 0000:00:04.0[A] -> Link [APCH] -> GSI 21 (level, high) -> IRQ 17 
Jul 16 20:05:27 dsd PCI: Setting latency timer of device 0000:00:04.0 to 64
Jul 16 20:05:27 dsd 0000:00:04.0: resource 0 start e0087000 len 4096 flags 0x00000200. 
Jul 16 20:05:27 dsd 0000:00:04.0: MAC Address 00:50:8d:XX:XX:XX
Jul 16 20:05:27 dsd 0000:00:04.0: link timer on.
Jul 16 20:05:27 dsd eth%d: mii_rw read from reg 2 at PHY 1: 0x0.
Jul 16 20:05:27 dsd eth%d: mii_rw read from reg 3 at PHY 1: 0x8201.
Jul 16 20:05:27 dsd 0000:00:04.0: open: Found PHY 0000:0020 at address 1.
Jul 16 20:05:27 dsd eth%d: mii_rw read from reg 4 at PHY 1: 0x1e1.
Jul 16 20:05:27 dsd eth%d: mii_rw wrote 0xde1 to reg 4 at PHY 1
Jul 16 20:05:27 dsd eth%d: mii_rw read from reg 1 at PHY 1: 0x786d.
Jul 16 20:05:27 dsd eth%d: mii_rw read from reg 0 at PHY 1: 0x3100.
Jul 16 20:05:27 dsd eth%d: mii_rw wrote 0xb100 to reg 0 at PHY 1
Jul 16 20:05:28 dsd eth%d: mii_rw read from reg 0 at PHY 1: 0x3000.
Jul 16 20:05:28 dsd eth%d: mii_rw read from reg 0 at PHY 1: 0x3000.
Jul 16 20:05:28 dsd eth%d: mii_rw wrote 0x3200 to reg 0 at PHY 1
Jul 16 20:05:28 dsd eth0: forcedeth.c: subsystem: 0147b:1c00 bound to 0000:00:04.0
Jul 16 20:05:28 dsd rc-scripts: Configuration not set for eth0 - assuming dhcp
Jul 16 20:05:28 dsd nv_open: begin
Jul 16 20:05:28 dsd eth0: nv_alloc_rx: Packet 0 marked as Available
Jul 16 20:05:28 dsd eth0: nv_alloc_rx: Packet 1 marked as Available
Jul 16 20:05:28 dsd eth0: nv_alloc_rx: Packet 2 marked as Available

<snip>

Jul 16 20:05:28 dsd eth0: nv_alloc_rx: Packet 125 marked as Available
Jul 16 20:05:28 dsd eth0: nv_alloc_rx: Packet 126 marked as Available
Jul 16 20:05:28 dsd eth0: nv_alloc_rx: Packet 127 marked as Available
Jul 16 20:05:28 dsd eth0: nv_txrx_reset
Jul 16 20:05:28 dsd startup: got 0x00000010.
Jul 16 20:05:28 dsd eth0: mii_rw read from reg 1 at PHY 1: 0x7849.
Jul 16 20:05:28 dsd eth0: mii_rw read from reg 1 at PHY 1: 0x7849.
Jul 16 20:05:28 dsd eth0: no link detected by phy - falling back to 10HD.
Jul 16 20:05:28 dsd eth0: nv_start_rx
Jul 16 20:05:28 dsd eth0: nv_start_rx to duplex 0, speed 0x000103e8.
Jul 16 20:05:28 dsd eth0: nv_start_tx
Jul 16 20:05:28 dsd eth0: no link during initialization.
Jul 16 20:05:28 dsd eth0: nv_stop_rx
Jul 16 20:05:28 dsd eth0: reconfiguration for multicast lists.
Jul 16 20:05:28 dsd eth0: nv_start_rx
Jul 16 20:05:28 dsd eth0: nv_start_rx to duplex 0, speed 0x000103e8.
Jul 16 20:05:28 dsd eth0: nv_stop_rx
Jul 16 20:05:28 dsd eth0: reconfiguration for multicast lists.
Jul 16 20:05:28 dsd eth0: nv_start_rx
Jul 16 20:05:28 dsd eth0: nv_start_rx to duplex 0, speed 0x000103e8.
Jul 16 20:05:28 dsd eth0: nv_stop_rx
Jul 16 20:05:28 dsd eth0: reconfiguration for multicast lists.
Jul 16 20:05:28 dsd eth0: nv_start_rx
Jul 16 20:05:28 dsd eth0: nv_start_rx to duplex 0, speed 0x000103e8.
Let me know if full logs would be useful (they are big, and it just shows a lot of interrupts, some packets being queued up, and 5 or so TX failures like the ones above). 

Daniel
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