Except for the case where we use the cloner library (clone_create() and
friends), there is no reason to enforce a unique device minor number
policy. There are various drivers in the source tree that allocate unr
pools and such to provide minor numbers, without using them themselves.
Because we still need to support unique device minor numbers for the
cloner library, introduce a new flag called D_NEEDMINOR. All cdevsw's
that are used in combination with the cloner library should be marked
with this flag to make the cloning work.
This means drivers can now freely use si_drv0 to store their own flags
and state, making it effectively the same as si_drv1 and si_drv2. We
still keep the minor() and dev2unit() routines around to make drivers
happy.
The NTFS code also used the minor number in its hash table. We should
not do this anymore. If the si_drv0 field would be changed, it would no
longer end up in the same list.
Approved by: philip (mentor)
mtx interface for NDIS_LOCK/UNLOCK. This should result in less
CPU utilization on behalf of the ndis driver. Additionally, this
commit also fixes a potential LOR in the ndis_tick code, by
not locking inside the ndis_tick function, but instead delegating
that work to the helpers called through IoQueueWorkItem. The
way that this is currently set up for NDIS prevents us from
simply implementing a callout_init_mtx mechanism.
However, the helper functions that handle the various timeout
cases implement fine-grained locking using the spinlocks provided
by the NDIS-compat layer, and using the mtx that is added with
this commit. This leaves the following ndis_softc members operated
on in ndis_tick in an unlocked context:
* ndis_hang_timer - Only modified outside of ndis_tick once, before
the first callout_reset to schedule ndis_tick
* ifp->if_oerrors - Only incremented in two places, which should be
an atomic op
* ndis_tx_timer - Assigned to 5 (when guaranteed to be 0) or 0
(in txeof), to indicate to ndis_tick what to
do. This is the only member of which I was
suspicious for needing the NDIS_LOCK here. My
testing (and another's) have been fine so far.
* ndis_stat_callout - Only uses a simple set of callout routines,
callout_reset only called by ndis_tick after
the initial reset, and then callout_drain is
used exactly once in shutdown code.
The benefit is that ndis_tick doesn't acquire NDIS_LOCK unless one of
the timeout conditions is flagged, and it still obeys the locking
order semantics that are dictated by the NDIS layer at the moment. I
have been investigating a more thorough s/spinlock/mtx/ of the NDIS
layer, but the simplest naive approach (replace KeAcquireSpinLock
with an mtx implementation) has anti-succeeded for me so far. This
is a good first step though.
Tested by: onemda@gmail.com
Reviewed by: current@, jhb, thompsa
Proposed by: jhb
We still use the interrupt filter due to performance problems that show up if
we don't. The main problem seen is that, due to the interrupt being edge
triggered, we occasionally miss interrupts which leads us to not notice that
we can transmit more packets. Using the new approach, which just schedules
a task on a taskqueue, we are guaranteed to have the task run even if the
interrupt arrived while we were already executing. If we were to use an
ithread the system would mask the interrupt while the handler is run and we'd
miss interrupts.
- Add a mutex to the softc to protect the softc and device hardware.
- Use a private timer to implement a watchdog for tx timeouts and drive
the timer for auto negotiation.
- Use bus_foo() rather than bus_space_foo() and remove the bus space
tag & handle from the softc.
- Call bus_setup_intr() after ether_ifattach().
Tested by: Florian Smeets flo of kasimir.com
Remove the code which disables port status change interrupts for 1s
when one occured -- this makes that events get lost or delayed until
the next change.
Obtained from: NetBSD
- Fixed a problem on i386 architecture when using split header/jumbo frame
firmware caused by hardware alignment requirements.
- Added #define BCE_USE_SPLIT_HEADER to allow the feature to be enabled/
disabled. Enabled by default.
PR: kern/123696
MFC after: 2 weeks
In the FreeBSD base system, there are only two utilities that use struct
tty, namely pstat and sicontrol. The sicontrol utility calls the
TCSI_TTY ioctl(), which copies struct tty back to userspace.
sicontrol should not have this functionality. The same data is already
provided by pstat. If we really want to be able to export these numbers
through a file descriptor to userspace, we can export struct xtty, which
should provide a better abstraction. The ttystat option was only used as
a debugging aid.
This makes sicontrol compile in the mpsafetty branch.
Reviewed by: peter
Approved by: philip (mentor)
is in little endian form. Likewise setting DC_AL_PAR0/DC_AL_PAR1
register expect the address to be in little endian form. For big
endian architectures the address should be swapped to get correct
one.
Change setting/getting ethernet hardware address to big endian
architecture frendly.
Reported by: Robert Murillo ( billypilgrim782001 at yahoo dot com )
Tested by: Robert Murillo ( billypilgrim782001 at yahoo dot com )
some longstanding issues:
o pass the vap since it's now the "coin of the realm" and required
to do things like set initial tx parameters in private node
state for use prior to association
o pass the mac address as cards that maintain outboard station
tables require this to create an entry (e.g. in ibss mode)
o remove the node table reference, we only have one node table
and it's unlikely this will change so this is not needed to
find the com structure
- Store the softc of the device in the 'si_drv1' of the cdev.
- Lookup the softc via 'si_drv1' in cdev methods rather than using the
minor number as a unit for devclass_get_softc().
- Lookup the device_t via the softc field in cdev methods rather than
using the minor number as a unit for devclass_get_device().
- Add a mutex to the softc to protect 'sc_opened'.
- Remove D_NEEDGIANT as all the smbus drivers are now MPSAFE and this driver
is now MPSAFE.
- Remove some checks for NULL softc pointers that can't happen and don't
bzero the softc during attach.
it. Bad imp. Removing us dips us under 10,000 in size too.
o Replace an unconditional 30ms DELAY (yes, busy wait) with a check of the
SIBUSY bit in the SelfST register before accessing the eeprom. This changes
the time to read the EEPROM from 2 * 20 * 30ms (1.2s) to < 20*25us (.0005s)
and make the attach of the card tolerable when ethernet media is present.
Include data from the datasheet about why this works. While this is a 2500x
speed increase, it doesn't really matter at all once the card is probed...
o set dev earlier in softc.
o remove unused fields from softc and args from cs_alloc_irq
o remove some commented code that will never be implemented.
o Don't try to send a packet and see if it worked. We don't
need this anymore, and it doesn't add any value.
o tweaks for BNC and AUI.
o limit possible time hung in the kernel to 4s rather than 40s.
sn(4) driver and also looking at newer drivers. The reason for the rewrite is
to support MII and to try and resolve some performance issues found when trying
to use the sn(4) driver on the Gumstix network boards.
For reference, the SMSC LAN91C111 is a non-PCI ethernet part whose lineage
dates back to Ye Olde Days of ISA. It seems to get some use in the embedded
space these days on parts lacking on-board MACs or on-board PCI controllers,
such as the XScale PXA line of ARM CPUs.
This also includes a driver for the SMSC LAN83C183 10/100 PHY.
Man page to follow.
they can re-added. Remove CS_NAME. Don't whine when there's an
ignored checksum error: User has said STFU, so we should S the FU.
(remove mandated properties).
- Add a mutex to the softc to protect the softc and the device hardware.
- Add a private timer to manage transmit watchdogs rather than using
if_timer/if_watchdog.
- Setup the interrupt handler after ether_ifattach().
Tested by: imp
for this driver is called 'ie'. Otherwise, ifconfig(8) doesn't recognize
any of the modules as being the ie(4) driver and will always try to kldload
the driver even when it is already present in the kernel.
Reported by: Thierry Herbelot
10BaseT' since it required 10BaseT to have carrier to switch to it.
This chip makes it hard to do proper auto, so we don't do it. We
can't test carrier on things easily.
Don't insist on carrier when we set the media. Don't report failures.
Remove a 1s! delay that appears to not be needed.
With these patches, and John Baldwin's patches, I'm able to pass
packets on my IBM EtherJet card again.
MAC events.
- Use bus_*() rather than bus_space_*() and remove the bus space tag and
handle from the softc.
- Retire unused macros for examining CIS tuples.
o When forced to be 10baseT, don't require that the 10baseT interface
have link to succeed. Still require it for IFM_AUTO, however, since it
appears that there's no way to tell if a specific type of interface
worked. I'm doing a web search for a datasheet now to see if there's
anything obvious.
o Minor incidental formatting nits, including collapsing code of the form
if (foo) {
bar();
} else {
if (baz)
bing();
}
into:
if (foo) {
bar();
} else if (baz) {
bing();
}
to save an indentation level.
o Remove stray reference to 3.x config file syntax.
# I believe John's patches still apply after this...
timer by keeping a once-a-second timer running that decrements a counter
similar to if_timer and reset the chip if it gets down to zero via the
decrement.
- Use IFQ_SET_MAXLEN().
systems where the CardBus bridge was connected to a APIC. The case
where the probe routine is told to not setup the IRQ was mishandled
but the error was masked in the case where the IRQ was a valid one
for the card.
MFC after: 1 week
bring it more up to date. The watchdog timer, and its
associated code, is all collapsed into the ndis_tick function
that was implemented for the NDIS-subsystem watchdog. This
implementation is similar to what numerous other drivers use
to implement the watchdog.
Reviewed by: thompsa, jhb
MFC after: 2 weeks
- Add a mutex to the softc to protect the softc and device hardware.
- Don't leak bus resources if if_alloc() fails during attach.
- Setup the interrupt handler after calling ether_ifattach().
- Use a private timer to manage the transmit watchdog.
Tested by: WATANABE Kazuhiro CQG00620 of nifty.ne.jp
