at all (ie reads yield constant values). Display the width as the
difference between max and min so that constant timers have width
zero.
o Get the address of the timer from the XPmTmrBlk field instead of
the V1_PmTmrBlk field. The former is a generic address and can
specify a memory mapped I/O address. Remove <machine/bus_pio.h>
to account for this. The timer is now properly configured on
machines with ACPI v2 tables, whether PIO or MEMIO. Note that
the acpica code converts v1 tables into v2 tables so the address
is always present in XPmTmrBlk.
o Replace the TIMER_READ macro with a call to the read_counter()
function and add a barrier to make sure that we observe proper
ordering of the reads.
Check for suspend before the device polling, rather than after it.
Check to see if the current thread owns the lock in ioctl and return
EBUSY if it does.
This advances the locking to the point that I can eject my fxp card 10
times in a row, but I agree with Jeff Hsu that we need to get the
network layer locking finished before chasing more of the races here
(actually, he doesn't think this set is worth it even). There's a
number of races between FXP_LOCK in detach and all other users of
FXP_LOCK, and this gets back to the 'device with sleepers being
forcibly detached' problem as well...
using 512 byte blocks).
cam_ccb.h: Bump up volume_size and cylinders in ccb_calc_geometry to
64 bits and 32 bits respectively, so we can hold larger
device sizes. cylinders would overflow at about 500GB.
Bump CAM_VERSION for this change. Note that this will
require a recompile of all applications that talk to the
pass(4) driver.
scsi_all.c: Add descriptions for READ/WRITE(16), update READ/WRITE(12)
descriptions, add descriptions for SERVICE ACTION IN/OUT.
Add a new function, scsi_read_capacity_16(), that issues
the read capacity service action. (Necessary for arrays
larger than 2^32 sectors.) Update scsi_read_write() to use
a 64 bit LBA and issue READ(16) or WRITE(16) if necessary.
NOTE the API change. This should be largely transparnet
to most userland applications at compile time, but will
break binary compatibility. The CAM_VERSION bump, above,
also serves the purpose of forcing a recompile for any
applications that talk to CAM.
scsi_all.h: Add 16 byte READ/WRITE structures, structures for 16 byte
READ CAPACITY/SERVICE ACTION IN. Add scsi_u64to8b() and
scsi_8btou64.
scsi_da.c: The da(4) driver probe now has two stages for devices
larger than 2TB. If a standard READ CAPACITY(10) returns
0xffffffff, we issue the 16 byte version of read capacity
to determine the true array capacity. We also do the same
thing in daopen() -- use the 16 byte read capacity if the
device is large enough.
The sysctl/loader code has also been updated to accept
16 bytes as a minimum command size.
For certain combinations of sectorsize, mediasize and random numbers
(used to define the mapping), a multisector read or write would ignore
some subset of the sectors past the first sector in the request because
those sectors would be mapped past the end of the parent device, and
normal "end of media" truncation would zap that part of the request.
Rev 1.19+1.20 of g_bde_work.c added the check which should have alerted
me to this happening. This commit maps the request correctly and
adds KASSERTS to make sure things stay inside the parent device.
This does not change the on-disk layout of GBDE, there is no need to
backup/restore.
it wrote the full length. The only case where this should be able
to happen is if we try to read/write past the end and the request
is truncated. We obviously should never try to do that, so this
code should never activate.
* AcpiOsDerivePciId(): finds a bus number, given the slot/func and the
acpi parse tree.
* AcpiOsPredefinedOverride(): use the sysctl hw.acpi.os_name to
override the value for _OS.
Ideas from: takawata, jhb
Reviewed by: takawata, marcel
Tested on: i386, ia64
be changed, it is very convenient to be able to toggle SDH/Sonet,
idle/unassigned cells and scrambled mode and to see the carrier
state.
Reviewed by: -arch (if_media.h definitions)
do for newstat_copyout().
Lie about disk drives which are character devices
in FreeBSD but block devices under Linux.
PR: 37227
Submitted by: Vladimir B. Grebenschikov <vova@sw.ru>
Reviewed by: phk
MFC after: 2 weeks
o do not use the in* and out* functions. These functions are used by
legacy drivers and thus must have ia32 compatible behaviour. Hence,
they need to have fences. Using these functions for newbus would
then pessimize performance.
o remove the conditional compilation of PIO and/or MEMIO support. It's
a PITA without having any significant benefit. We always support them
both. Since there are no I/O ports on ia64 (they are simulated by the
chipset by translating memory mapped I/O to predefined uncacheable
memory regions) the only difference between PIO and MEMIO is in the
address calculation. There should be enough ILP that can be exploited
here that making these computations compile-time conditional is not
worth it. We now also don't use the read* and write* functions.
o Add the missing *_8 variants. They were missing, although not missed.
It's for completeness.
o Do not add the fences that were present in the low-level support
functions here. We're using uncacheable memory, which means that
accesses are in program order. Change the barrier implementation
to not only do a memory fence, but also an acceptance fence. This
should more reliably synchronize drivers with the hardware. The
memory fence enforces ordering, but does not imply visibility (ie
the access does not necessarily have happened). This is what the
acceptance deals with.
cpufunc.h cleanup:
o Remove the low-level memory mapped I/O support functions. They are
not used. Keep the low-level I/O port access functions for legacy
drivers and add fences to ensure ia32 compatibility.
o Remove the syscons specific functions now that we have moved the
proper definitions where they belong.
o Replace the ia64_port_address() and ia64_memory_address() functions
with macros. There's a bigger change inline functions get inlined
when there aren't function callsi and the calculations are simply
enough to do it with macros.
Replace the one reference to ia64_memory address in mp_machdep.c to
use the macro.
(currently) only consumer (en).
Add a sysctl node hw.atm where the atm drivers will hook on their hardware
sysctl sub-trees.
Make atm_ifattach call if_attach and remove the corresponding call to if_attach
from en. Create atm_ifdetach and use that in en.
While the last change actually changes the interface this is not a problem in
practice because the only other consumer of this API is an older LANAI driver
on the net, that is not ready for current anyway.
Reviewed by: -atm
ia64 by defining them in terms of newbus. Add a static inline for
fillw(), which doesn't have anything to do with I/O.
It's still ugly, but now the ugliness can be removed from ia64
specific headers.
1) always call fxp_stop in fxp_detach. Since we don't read from
the card, there's no need to carefully look at things with
bus_child_present.
2) Call FXP_UNLOCK() before calling bus_teardown_intr to avoid
a possible deadlock reported by jhb.
3) add gone to the softc. Set it to true in detach.
4) Return immediately if gone is true in fxp_ioctl
5) Return immediately if gone is true in fxp_intr
that one cannot generally hold a lock and call bus_teardown_intr.
This is race free with wi_intr because bus_teardown_intr won't allow
wi_intr to be called after it returns.
# jeff hsu points out that there might be a race between this unlock
# and wi_start. While that may be true also, it won't impact this commit.
Submitted by: jhb
