Freeze after auto negotiation

"No free buffers for rx" usually means that the IP stacks is receiving too many packets and can't handle the traffic. Is there a lot going on on the network? Especially broadcast packets, that would go through the MAC address filter in the TSE component.

There could be a hardware problem that would cause the receive DMA to get data even when there are no packets on the network. Could you use a signaltap probe on the Avalon Stream interface between the Ethernet MAC and the receive DMA? Check if there is any traffic there.

hello Kriska,

InterNiche Portable TCP/IP, v3.1 
Copyright 1996-2008 by InterNiche Technologies. All rights reserved. 
prep_tse_mac 0
 -->Created "Inet main" task (Prio: 2)
Created "clock tick" task (Prio: 3)
Your Ethernet MAC address is 00:07:ed:ff:0d:cb
Static IP Address is 138.254.102.120
prepped 1 interface, initializing...
INFO    : TSE MAC 0 found at address 0x0c000000
INFO    : PHY Marvell 88E1111 found at PHY address 0x12 of MAC Group
INFO    : PHY - Automatically mapped to tse_mac_device
INFO    : PHY - Restart Auto-Negotiation, checking PHY link...
INFO    : PHY - Auto-Negotiation PASSED
MARVELL : Mode changed to RGMII/Modified MII to Copper mode
MARVELL : Enable RGMII Timing Control
MARVELL : PHY reset
INFO    : PHY - Checking link...
INFO    : PHY - Link not yet established, restart auto-negotiation...
INFO    : PHY - Restart Auto-Negotiation, checking PHY link...
INFO    : PHY - Auto-Negotiation PASSED

InterNiche Portable TCP/IP, v3.1 
Copyright 1996-2008 by InterNiche Technologies. All rights reserved. 
prep_tse_mac 0
 -->Created "Inet main" task (Prio: 2)
Created "clock tick" task (Prio: 3)
Your Ethernet MAC address is 00:07:ed:ff:fc:4f
Static IP Address is 138.254.102.120
prepped 1 interface, initializing...
INFO    : TSE MAC 0 found at address 0x0c000000
INFO    : PHY Marvell 88E1111 found at PHY address 0x12 of MAC Group
INFO    : PHY - Automatically mapped to tse_mac_device
INFO    : PHY - Restart Auto-Negotiation, checking PHY link...
INFO    : PHY - Auto-Negotiation PASSED
MARVELL : Mode changed to RGMII/Modified MII to Copper mode
MARVELL : Enable RGMII Timing Control
MARVELL : PHY reset
INFO    : PHY - Checking link...
INFO    : PHY - Link established
INFO    : PHY - Speed = 1000, Duplex = Full
OK, x=95, CMD_CONFIG=0x00000000
MAC post-initialization: CMD_CONFIG=0x0400020b
 RX descriptor chain desc (1 depth) created
No free buffers for rx
No free buffers for rx
No free buffers for rx
No free buffers for rx
No free buffers for rx
No free buffers for rx
No free buffers for rx
No free buffers for rx