[netdevice] Separate out the concept of hardware and link-layer addresses
The hardware address is an intrinsic property of the hardware, while
the link-layer address can be changed at runtime. This separation is
exposed via APIs such as PXE and EFI, but is currently elided by gPXE.
Expose the hardware and link-layer addresses as separate properties
within a net device. Drivers should now fill in hw_addr, which will
be used to initialise ll_addr at the time of calling
register_netdev().
Add ability for network devices to flag link up/down state to the
networking core.
Autobooting code will now wait for link-up before attempting DHCP.
IPoIB reflects the Infiniband link state as the network device link state
(which is not strictly correct; we also need a succesful IPoIB IPv4
broadcast group join), but is probably more informative.
Use net_device_operations structure and netdev_nullify() to allow for
safe dropping of the netdev ref by the driver while other refs still
exist.
Add netdev_irq() method. Net device open()/close() methods should no
longer enable or disable IRQs.
Remove rx_quota; it wasn't used anywhere and added too much complexity
to implementing correct interrupt-masking behaviour in pxe_undi.c.
Add "name" field to struct device to allow human-readable hardware device
names.
Add "dev" pointer in struct net_device to tie network interfaces back to a
hardware device.
Force natural alignment of data types in __table() macros. This seems to
prevent gcc from taking the unilateral decision to occasionally increase
their alignment (which screws up the table packing).
Autopadding was sometimes overwriting the struct list_head at the end
of the packet buffer. Although pkbuffs are guaranteed to be at least
PKB_ZLEN bytes long, there's no guarantee that the data starts at the
start of the packet buffer.
Since we have to align data for rtl8139 anyway, and since the start of
the packet buffer is guaranteed to be aligned to PKB_ALIGN, we may as
well just shuffle the packet down so that it starts at the start of
the packet buffer. This simultaneously aligns the packet and ensures
that there is enough room for the zero-padding.
Restructured PCI subsystem to fit the new device model.
Generic PCI code now handles 64-bit BARs correctly when setting
"membase"; drivers should need to call pci_bar_start() only if they want
to use BARs other than the first memory or I/O BAR.
Split rarely-used PCI functions out into pciextra.c.
Core PCI code is now 662 bytes (down from 1308 bytes in Etherboot 5.4).
284 bytes of this saving comes from the pci/pciextra split.
Cosmetic changes to lots of drivers (e.g. vendor_id->vendor in order to
match the names used in Linux).
I want to get to the point where any header in include/ reflects a
standard user-level header (e.g. a POSIX header), while everything that's
specific to gPXE lives in include/gpxe/. Headers that reflect a Linux
header (e.g. if_ether.h) should also be in include/gpxe/, with the same
name as the Linux header and, preferably, the same names used for the
definitions.
#!/usr/bin/perl -w -pi -0777
use strict;
( my $type ) = /find_(\w+?)_boot_device/ or die "Could not find type\n";
( my $disable ) = /\.disable\s*=\s*(\w+)/ or die "Could not locate disable\n";
s/(${disable}\s*\(\s*struct\s+nic\s+\*nic)(\s*\)\s*\{)(\s*)/${1}, struct ${type}_device \*${type} __unused${2}${3}nic_disable ( nic );${3}/s;
s/(${disable}\s*\(\s*struct\s+nic\s+\*nic)(\s*\)\s*;)/${1}, struct ${type}_device \*${type}${2}/g;
s/^\s*.disable\s*=\s*${disable}\s*,\s*?$//m;
s/(_probe\s*\(\s*)struct\s+dev\s+\*dev/${1}struct nic \*nic/g;
s/^\s*struct\s+nic\s+\*nic\s*=\s*nic_device\s*\(\s*dev\s*\)\s*;\s*?$//m;
s/^(\s*)(nic->(ioaddr|irqno)\s*=\s*${type})/${1}${type}_fill_nic ( nic, ${type} );\n${1}${2}/m;
Michael Brown