using level triggered interrupts, which livelocks calling intr routine
if the data register is not read in the interrupt routine, as it's case
when polling after interrupts are enabled during boot.
Block all interrupts when polling for keypress, and modify intr routine
to read and store value from data register. The latter one is to avoid
losing a keypress when one would manage to press a key when kernel is
not in spl-guarded code section.
Tested with classic pccons, 'pcconskbd at pckbc' and 'pckbd at pckbc'
configurations, on i386.
- minor code cleanups
- rename some functions for better consistensy/clarity
- consolidate extended message generation into new function
- a couple of minor code clarifications to eliminate extra return
statements and make absolutely sure actscb is NULL during a reselect
tag handy and we are going to need more of it in pckbc_poll_data1() soon,
change pckbc_poll_data1() to accept it as first arg. iot, ioh_d, ioh_c are
no longer passed separately. Use fabricated pckbc tag for calls from
arch/arc/jazz/pckbc_jazzio.c and dev/isa/pckbc_isa.c.
Fix longstanding bug where we should have been checking
against Channel B's settings to see whether to apply tag
usage. Oops.
Some more 2300 support- macroize access to request queue in/out pointers.
Firmware crashes now handled in platform outer code via an isp_async call.
If we get a LIP, and we're on a private or public loop, kill off all
active commands as if they had been killed by a 'SCSI Bus Reset'. I've
seen data corruption on commands that complete 'normally' after a LIP.
Bad.
and shrinking the object code somewhat. On an R4400:
Before:
text data bss dec hex filename
16248 16 0 16264 3f88 dp83932.o
Before:
text data bss dec hex filename
14424 16 0 14440 3868 dp83932.o
directly to mbufs. Handles both 32-bit and 16-bit, big- and little-
endian configurations of the chip (we could squeeze out some conditionals
yet, though).
Change the first argument of awi_init/awi_stop from struct awi_softc to
struct ifnet to match the definition if_init/if_stop, though we don't
use ether_ioctl() yet.
Some CMOS Z85C30 SCC's (as used in the SGI Indy and Mips Magnum 3000's)
reset the baud rate generator when a new prescaler is loaded - despite
what is documented in the datasheet.
Avoids "character glitch" problems when line discipline characteristics
are changed at the start of the login process, or during a ftp session
on the /dev/console device.
Tested on -sgimips, -mipsco and -alpha platforms
Fix promiscuous mode, taken from FreeBSD.
Fix to re-enable the card after suspend/resume.
Reflect current operational rate to if_media interface.
Avoid duplicate copy in transmit.
Move most of debug printfs into IFF_DEBUG.
Disable ANCACHE - designed for IPv4 only and no one use it.
Add IFF_ALLMULTI flags, as we don't have multicast filter.
Convert bzero/bcopy to memset/memcpy.
... sorry for jumbo commit.
This was taken from the PIIX4 manual, and thus doesn't have all
the legacy crap (relative to "modern" ISA PICs, anyway), so if
you have a real i8259 manual, fill in some more bits.
follows BSD/OS practice and ucd-snmp code (FreeBSD does it for specific
interfaces only).
was: if_lastchange get updated on every packet transmission/receipt.
now: if_lastchange get updated when IFF_UP is changed.
resistors, which return the last value written to the bus on a read. This
makes detecting empty channels on my HCCS and D.T. Software IDE interfaces
rather faster.
- Set XS_TIMEOUT on a selection timeout condition.
- Do not bother to call AscStartChip() in AscResetChipAndScsiBus()--
just clear the chip status.
- Make sure address is word-aligned in AscWriteLramByte().
Tested on my adv (AdvanSys ABP-9xxUA) with CRW8424S and UMAX SuperVista S-12.
Earlier versions of the system would get stuck trying to recover from error
conditions when the CD-RW drive was in heavy use. I have not seen that
behavior with these small patches.
network interfaces. This works by pre-computing the pseudo-header
checksum and caching it, delaying the actual checksum to ip_output()
if the hardware cannot perform the sum for us. In-bound checksums
can either be fully-checked by hardware, or summed up for final
verification by software. This method was modeled after how this
is done in FreeBSD, although the code is significantly different in
most places.
We don't delay checksums for IPv6/TCP, but we do take advantage of the
cached pseudo-header checksum.
Note: hardware-assisted checksumming defaults to "off". It is
enabled with ifconfig(8). See the manual page for details.
Implement hardware-assisted checksumming on the DP83820 Gigabit Ethernet,
3c90xB/3c90xC 10/100 Ethernet, and Alteon Tigon/Tigon2 Gigabit Ethernet.
when the system is "warm", i.e. interrupts are not blocked anymore.
This seems to be necessary on my PS/2 Model 70 keyboard - without this,
system ends up in endless loop calling the keyboard intr routine if a key
is pressed when polling. This _may_ be just specific to level-triggered
interrupts PS/2 MCA uses, though it's more likely it's just the way the
particular keyboard controller works.
Discussed on tech-kern@.
Handle special case for IFF_PROMISC. If only IFF_PROMISC
flag is changed, do not call an_init() to avoid initiating
reassociation to another access point. It is really
helpful for tcpdump(8).
way of doing business- modulo some startup spasms and peculiarities
of the way kthreads are started (*after* configuration, weird) and
some strangeness with the freeze/thaw code, what now happens is
that any of Loop Down, LIP, Loop Reset or Port Datbase or Name
Server Database Changed ASYNC events cause the queues to freeze
for this channel. The arrival of a Loop UP is not relevant.
What *is* relevant is that the Port Datbase or Name Server Changed
async event indicate that it's okay to go and (re)evaluate the
state of the FC link and (re)probe local loop and fabric membership.
We have a kthread do this because it's *sooooo* much nicer to be
able to sleep while doing the 130-250 mailbox commands it'll take
to re-evaluate things.
When the state is well known again, we can unfreeze the channel
queues. Then, as commands start arriving, we simply can start them
or bounce them with XS_SELTIMEOUT (if the device in question has
gone away). Previously, we did lazy evaluation, which meant that
if a change occurred, we would wait until the very *next* command
to go rebuild stuff.
The reason this is not sensible is:
a) Even with sleeping, you can hang up your system because you might be
making some poor stat(2) call pay the price of re-evaluating the whole
fabric.
b) If we ever really want to get to dynamic attachment/detachment, we
should find out sooner, rather than later, where things get to.
Split off ispminphys_1020 from ispminphys- a 1020 has a 24 bit limit-
not anything newer.
Re-enable LIPs and Loop Resets as async events- this allows the outer
layer to set policy about them.
Roll platform major && minor. Remove bogus waitq (no longer used).
Remove callout entry in softc (no longer used). Define some shorthands
for channels. Clean up a variety of cruft left over from the
thorpej_scsipi changeover.
- Add some additional config block bits for the i82558/i82559.
- Change the config block template to only fill in the must-be-one
reserved bits, leave fxp_init() to fill in all the important things.
- On the i82558/i82559, we can use "Receive Long Frames" rather than
"Save Bad Frames" to support the VLAN MTU.
- Use 802.3x flow control on the i82558/i82559. This is all handled
transparently by the hardware. When in promiscuous mode, allow
wire-watchers to see the flow control frames.
- Use the Extended TxCB format on the i82558/i82559. This places two
Transmit Buffer Descriptors directly in the TxCB, which should cover
the vast majority of packets transmitted. This saves PCI transactions
that would otherwise be required to fetch the TBD list.
With the tansmit queue length changes from yesterday, this gets us up to
11.5MB/s TCP transmit speed, out of an absolute maximum of 12MB/s possible
on a 100Mb/s link.
kanaoka