Marty Connor [Tue, 20 Nov 2007 21:23:12 +0000 (16:23 -0500)]
This version now transmits and receives.
There may still be an issue with memory handling, since it seems to
die ungracefully when ARP packets come in after loading a kernel.
Something to debug.
Michael Brown [Mon, 5 Nov 2007 13:29:05 +0000 (13:29 +0000)]
Work around a bug in the OpenSolaris iSCSI target.
We didn't specify values for MaxRecvDataSegmentLength and
MaxBurstLength (to save space, since we were happy with the
RFC-defined default values of 8kB and 256kB respectively). However,
the OpenSolaris target (incorrectly) assumes default values of zero
for these parameters.
The upshot was that the OpenSolaris target would get stuck in an
endless loop trying to send us the first 512-byte sector, zero bytes
at a time, and would eventually run out of memory and core-dump.
Fixed by explicitly specifying the default values for these two
parameters.
Michael Brown [Sun, 4 Nov 2007 04:27:38 +0000 (04:27 +0000)]
Allow space for the kernel's real-mode .bss. Previously we weren't
allowing any space for this, which makes it surprising that bzImage
loading ever worked.
Michael Brown [Wed, 10 Oct 2007 19:12:25 +0000 (20:12 +0100)]
Ensure that empty e820 regions are skipped even at the end of the
memory map. (We achieve this by setting CF on the last entry if it is
zero-length; this avoids the need to look ahead to see at each entry
if the *next* entry would be both the last entry and zero-length).
This fixes the "0kB base memory" error message upon starting Windows
2003 on a SunFire X2100.
Michael Brown [Wed, 10 Oct 2007 19:12:25 +0000 (20:12 +0100)]
Ensure that empty e820 regions are skipped even at the end of the
memory map. (We achieve this by setting CF on the last entry if it is
zero-length; this avoids the need to look ahead to see at each entry
if the *next* entry would be both the last entry and zero-length).
This fixes the "0kB base memory" error message upon starting Windows
2003 on a SunFire X2100.
Michael Brown [Thu, 4 Oct 2007 13:46:56 +0000 (14:46 +0100)]
Force a netdevice poll in net_tx() before attempting to transmit
packet, to work around the problem whereby small TX rings get backed
up because we haven't yet poll()ed for TX completions.
Michael Brown [Thu, 4 Oct 2007 13:46:56 +0000 (14:46 +0100)]
Force a netdevice poll in net_tx() before attempting to transmit
packet, to work around the problem whereby small TX rings get backed
up because we haven't yet poll()ed for TX completions.
Michael Brown [Fri, 28 Sep 2007 00:23:06 +0000 (01:23 +0100)]
Redefine bzimage_exec_context::mem_limit to be the highest permissible
byte, rather than the number of permissible bytes (i.e. subtract one
from the value under the previous definition to get the value under
the new definition).
This avoids integer overflow on 64-bit kernels, where
bzhdr.initrd_addr_max may be 0xffffffffffffffff; under the old
behaviour we set mem_limit equal to initrd_addr_max+1, which meant it
ended up as zero. Kernel loads would fail with ENOBUFS.
Michael Brown [Tue, 25 Sep 2007 17:01:15 +0000 (18:01 +0100)]
Use full protected mode for access to high memory within prefix, to
work around limitations in real-mode virtualisation support on Intel
VT-capable chips.
Michael Brown [Mon, 17 Sep 2007 17:38:04 +0000 (18:38 +0100)]
Moved iobuf.h assertions outside the static inline functions, so that
the assert message's file and line number gives some clue as to the
real location of the problem.
Michael Brown [Mon, 17 Sep 2007 18:01:10 +0000 (19:01 +0100)]
Added an almost obscene amount of debugging and assertion code while
tracking down a bug that turned out to be a free_iob() used where I
needed a netdev_tx_complete(). This left the freed I/O buffer on the
net device's TX list, with bad, bad consequences later.
Michael Brown [Mon, 17 Sep 2007 17:38:04 +0000 (18:38 +0100)]
Moved iobuf.h assertions outside the static inline functions, so that
the assert message's file and line number gives some clue as to the
real location of the problem.