get_card_packet() from ofnet.c allocates a netbuff based on the device's MTU:
nb = grub_netbuff_alloc (dev->mtu + 64 + 2);
In the case when the MTU is large, and the received packet is
relatively small, this leads to allocation of significantly more memory,
than it's required. An example could be transmission of TFTP packets
with 0x400 blksize via a network card with 0x10000 MTU.
This patch implements a per-card receive buffer in a way similar to efinet.c,
and makes get_card_packet() allocate a netbuff of the received data size.
Signed-off-by: Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
In the current code search_net_devices() uses the "alloc-mem" command
from the IEEE1275 User Interface for allocation of the transmit buffer
for the case when GRUB_IEEE1275_FLAG_VIRT_TO_REAL_BROKEN is set.
I don't have hardware where this flag is set to verify if this
workaround is still needed. However, further changes to ofnet will
require to execute this workaround one more time. Therefore, to
avoid possible duplication of code I'm moving this piece of
code into a function.
Signed-off-by: Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
sun4v vnet devices do not implement the support of duplex and speed
instance attributes. An attempt to open such a device with
the attributes will fail:
ok select net:speed=auto,duplex=auto
Unknown key 'speed'
Unknown key 'duplex'
Manual Configuration: Host IP, boot server and filename must be specified
WARNING: /virtual-devices@100/channel-devices@200/network@0: Can't open OBP standard TFTP package
Can't open device
ok
Therefore, let's not set SUFFIX for such devices.
Signed-off-by: Stanislav Kholmanskikh <stanislav.kholmanskikh@oracle.com>
Stanislav Kholmanskikh