In devsw() return dead_cdevsw instead of NULL in case the dev_t does not
have a si_devsw.
This may improve our survival chances with devices which go away unexpectedly.
compile-time constants). That is, a "bucket" now is not necessarily
a page-worth of mbufs or clusters, but it is MBUF_BUCK_SZ, CLUS_BUCK_SZ
worth of mbufs, clusters.
o Rename {mbuf,clust}_limit to {mbuf,clust}_hiwm and introduce
{mbuf,clust}_lowm, which currently has no effect but will be used
to set the low watermarks.
o Fix netstat so that it can deal with the differently-sized buckets
and teach it about the low watermarks too.
o Make sure the per-cpu stats for an absent CPU has mb_active set to 0,
explicitly.
o Get rid of the allocate refcounts from mbuf map mess. Instead,
just malloc() the refcounts in one shot from mbuf_init()
o Clean up / update comments in subr_mbuf.c
used to share resource limits between rfork threads, but never was.
Removing it makes resource limit locking much simpler -- only the current
process can change the contents of the structure that p_limit points to.
support for Tekram DC395U2W cards.
Add a fix submitted by joerg@ to correctly report some errors to CAM.
Use bus_dma instead of the remaining vtophys().
reference counter array for mbuf clusters. I don't know
how this got past early testing nor how it survived so long
without getting caught. If anyone was seeing really really
bizarre memory corruption in a few mbufs this would be why.
field for holding driver-dependant data. Instead of putting the pointer
to the driver command struct in there, take advantage of these structs
being a (virtually) contiguous array and just put the array index in the
field.
control block. Allow the socket and tcpcb structures to be freed
earlier than inpcb. Update code to understand an inp w/o a socket.
Reviewed by: hsu, silby, jayanth
Sponsored by: DARPA, NAI Labs
routine does not require a tcpcb to operate. Since we no longer keep
template mbufs around, move pseudo checksum out of this routine, and
merge it with the length update.
Sponsored by: DARPA, NAI Labs
that a command completion happened, all further processing is deferred to
a taskqueue. The taskqueue itself runs implicetely under Giant, but we
already used a taskqueue for the biodone() processing, so this at least
saves the contesting of Giant in the interrupt handler.
retain symetry with aac_alloc_commans(). Since aac_alloc_commands()
allocates fib maps and places them onto the fib lists, aac_free_commands()
should reverse those operations.
o Combine two ifs with the same body with an ||.
o Switch from uintptr_t to uint32_t for fib map load operations.
The target is a uint32_t so using this type for the map load call
avoids an extra cast. uintptr_t should only be used when you need
an "int sized the same as the machine's poitner size" which is not
the case here.
o Removed the commented out M_WAITOK flag in the allocation in
aac_alloc_commands(). The kernel will only block in the allocator
if it can grow the size of the kernel. This usually results in a
page-out which could involve this aac device. Thus, sleeping here
could deadlock the machine. Assuming this operation is occurring outside
of attach time, we have enough fibs to operate anyway, so waiting for
fibs to free up is okay if not optimal.
o In aac_alloc_commands(), if we cannot dmamem_alloc additional fib
space, free the fib map.
o In aac_alloc_commands(), if we cannot create per-command dmamaps, don't
lose track of the fib map that is mapping all of the commands that we
have already released into the free pool. Instead, just cut out of
the loop and modify aac_free_commands to not attempt to free maps that
have not been allocated.
o Don't use a magic number when pre-allocating fibs.
o Use PAGE_SIZE to allocate in page sized chunks instead of an
architecture specific constant.
Submitted by: gibbs
- delay acks for T/TCP regardless of delack setting
- fix bug where a single pass through tcp_input might not delay acks
- use callout_active() instead of callout_pending()
Sponsored by: DARPA, NAI Labs
wish the busdma APIs were more consistent accross architectures.
We should probably move all the other DMA map creations in
xl_attach() where we can really handle them failing, since
xl_init() is void and shouldn't fail.
Pointy hat to: mux
Tested by: Anders Andersson <anders@hack.org>
One of the vnodes is on different mount and is possibly on a different
kind of filesystem; treating it as an smbfs vnode then writing to it
will probably corrupt it.
PR: 48381
MFC after: 1 month
group number properly based on the board id. Perform dummy reads of
registers after writing to flush the hardware write buffers.
This gets the soon to be committed zs attachment working.
Minor CIS resource allocation code cleanup
Remove some fairly useless debug writes.
This finishes the work to move as much cardbus code as possible into
pci. We wind up removing 800-odd lines from cardbus.c: we go from
1285 to 400 lines.
Reviewed by: mdodd
bus_dmamap_load() it.
- Make it so reusing mbufs when we can't allocate (or map) new ones
actually works. We were previously trying to reuse a mbuf which
was already bus_dmamap_unload()'ed.
Reviewed by: silby
- Fix memory leak in detaching.
- Initialize fc->status to other than FWBUSREST.
* fwohci.c
- Ignore BUS reset events while BUS reset phase. We can't clear that flag
during bus reset phase.
UltraSPARCs, and an eeprom attachment for fhc, which allows the date
to be set properly on these machines. Central is a wierd bus which
seems to only ever have 1 fhc attached to it. FHC (FireHose Controller)
is another wierd bus with various things on it depending where its attached.
The fhc attached to central has eeprom and zs, and the fhcs which attach
directly to nexus have simm-status, environment and other nodes, none of
which I'll probably ever have documentation for.
Thanks to Ade Lovett for providing access to an 8 cpu e4500.
#if'ed out for a while. Complete the deed and tidy up some other bits.
We need to be able to call this stuff from outer edges of interrupt
handlers for devices that have the ISR bits in pci config space. Making
the bios code mpsafe was just too hairy. We had also stubbed it out some
time ago due to there simply being too much brokenness in too many systems.
This adds a leaf lock so that it is safe to use pci_read_config() and
pci_write_config() from interrupt handlers. We still will use pcibios
to do interrupt routing if there is no acpi.. [yes, I tested this]
Briefly glanced at by: imp
is encoded in the PCI BAR. The latter is more reliable.
This allows the sio/modem function of the Xircom RealPort ethernet+modem
card to work. Note that there still seem to be issues with sio_pci not
releasing resources on detach.
pci busses implement this.
Also minor comment smithing in cardbus. Fix copyright to this year
with my name on it since I've been doing a lot to this file.
Reviewed by: jhb
on the fly and read into userland one at a time, this costs very
little total memory. The pnpinfo sizes of pccard is more than 64
bytes due to the length of the strings that man cards have in their
CIS.
- Don't initiate bus reset even if probe failed for some nodes to prevent
infinite bus reset loop.
Problem Reported by: Pierre Beyssac <pb@fasterix.frmug.org>
- Protect timeout routine with splfw() for 4-stable.
* sbp.c
- Make sure to release devq when start request.
cr_uid.
Note: we do not have socheckuid() in RELENG_4, ip_fw2.c uses its
own macro for a similar purpose that is why ipfw2 in RELENG_4 processes
uid rules correctly. I will MFC the diff for code consistency.
Reported by: Oleg Baranov <ol@csa.ru>
Reviewed by: luigi
MFC after: 1 month
sched_lock around accesses to p_stats->p_timer[] to avoid a potential
race with hardclock. getitimer(), setitimer() and the realitexpire()
callout are now Giant-free.
add a signal to a mailbox's pending set.
- Add a new function, thread_signal_upcall(), this causes the current thread
to upcall so that we can deliver pending signals.
Reviewed by: mini
I was in two minds as to where to put them in the first case..
I should have listenned to the other mind.
Submitted by: parts by davidxu@
Reviewed by: jeff@ mini@
Wearing said pointy hat, correct the oversight and hope nobody
notices.
# this should make xircom modems happier to detach once other bugs with
# the cardbus layer are fixed.
Noticed by: scottl
Conical Hat to: imp
queue lock already held.
- In getblk() and flushbufqueues() use bremfreel() while we still have the
buf queue lock held to keep the lists consistent.
- Add LK_NOWAIT to two cases where we're essentially asserting that the bufs
are not locked while acquiring the locks. This will make sure that we get
the appropriate panic() and not another one for sleeping with a lock held.
