according to the method outlined in the AHCI spec.
Tested with FreeBSD 9/10/11 with MSI disabled,
and also NetBSD/amd64 (lightly).
Reviewed by: neel, tychon
MFC after: 3 weeks
to bus_space(9) and that uses the proto(4) driver for talking to
hardware. If the I/O resource is a memory mapped I/O resource,
then mmap(2) will be attempted to avoid read(2)/write(2) overhead.
Sponsored by: Juniper Networks, Inc.
It exposes I/O resources to user space, so that programs can peek
and poke at the hardware. It does not itself have knowledge about
the hardware device it attaches to.
Sponsored by: Juniper Networks, Inc.
Instead opening/closing provider by each of metadata classes, do it only
once in core code. Since for SCSI disks open/close means sending some
SCSI commands to the device, this change reduces taste time.
MFC after: 2 weeks
Sponsored by: iXsystems, Inc.
FD_SETSIZE is often used as an argument to select or compared with an
integer file descriptor. Rather than force 3rd party software to add
explicit casts, just make it a plain (int) constant as on other
operating systems.
Previous discussion:
http://lists.freebsd.org/pipermail/freebsd-standards/2012-July/002410.html
returns ZIO_PIPELINE_CONTINUE from vdev_op_io_start to zio_execute resulting
in the wrong ZIO continuing its pipeline.
This is a serious issue which could cause data loss / corruption but appears
to be limited to error handling such as when vdev_readable(vd) returns false.
MFC after: 2 days
the MYBEACON RX filter (only receive beacons which match the BSSID)
or all beacons on the current channel.
* Add the relevant RX filter entry for MYBEACON.
Tested:
* AR5416, STA
* AR9285, STA
TODO:
* once the code is in -HEAD, just make sure that the code which uses it
correctly sets BEACON for pre-AR5416 chips.
Obtained from: QCA, Linux ath9k
the QCA HAL.
This fires off an interrupt if the TSF from the AP / IBSS peer is
wildly out of range. I'll add some code to the ath(4) driver soon
which makes use of this.
TODO:
* verify this didn't break TDMA!
to the hardware.
The QCA HAL has a comment noting that if this isn't done, modifications
to AR_IMR_S2 before AR_IMR is flushed may produce spurious interrupts.
Obtained from: QCA
Flushing the caches is required before doing a panic dump, but ARM
doesn't provide a flavor of flush that gets broadcast to other cores.
However, all cores except one are stopped before doing a dump, so this
works around the lack of a global flush/invalidate by doing it locally
on each CPU as part of stopping.
Discussed with: cognet@
This was added ca. 2004 for the purpose of ensuring the caches were in the
right state after the debugger set a breakpoint. kdb_cpu_sync_icache()
was added in 2007 to handle that situation, and now the wbinv_all is
actually harmful because the operation isn't broadcast to other cores.
* memory is now allocated as early as possible, without holding locks.
* sysctl users are now guaranteed to get a response (M_WAITOK buffer prealloc).
* socket users are more likely to use on-stack buffer for replies.
* standard kernel malloc/free functions are now used instead of radix wrappers.
rt_msg2() has been renamed to rtsock_msg_buffer().
MFC after: 1 month
On head/, or more specifically, when WITNESS is in
the kernel config, the console is spammed excessively
with lock order reversal between isofs and devfs.
Set debug.witness.trace=0 in the installer sysctl.conf
to avoid printing the full KDB stack backtrace. This
does not prevent printing the lock order reversal has
happened, only lessens the console spam.
Sponsored by: The FreeBSD Foundation
#gpio-cells property.
Add a new ofw_bus method (OFW_BUS_MAP_GPIOS()) that allows the GPIO
controller to implement its own mapping to deal with gpio-specifiers,
allowing the decoding of gpio-specifiers to be controller specific.
The default ofw_bus_map_gpios() decodes the linux standard (#gpio-cells =
<2>) and the FreeBSD standard (#gpio-cells = <3>).
It pass the gpio-specifier flag field to the children as an ivar variable so
they can act upon.
checks for special pcid values in invlpg_pcid_handler(). Forst check
for special values, and only then do PCID-specific page invalidation.
Minor fix to the style compliance, declare local variable at the
function start.
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
explicitely linking main binary with -lpthread. Before, libthr
appeared in the list due to dependency of one of the kerberos libs.
Due to the change in ld(1) behaviour of not copying NEEDED entries
from direct dependencies into the link results, the order becomes
reversed.
The libthr must appear before libc to properly interpose libc symbols
and provide working rtld locks implementation. The symptom was sshd
hanging on rtld bind lock during nested symbol binding from a signal
handler.
Approved by: des (openssh maintainer)
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
entry and performs the upgrade of the entry permissions from read-only
to read-write, we must allow to search for the source pages in the
backing object, like we do in the case of forking the read-only wired
entry. For the fork case, the behaviour is allowed by src_readonly
boolean, which in fact is only used to assert that read-write case
provides all source pages in the top-level object.
Eliminate the src_readonly variable. Allow for the copy loop to look
into the backing objects, add explicit asserts to ensure that only
read-only and upgrade case actually does.
Expand comments. Change the panic call into assert.
Reported by: markj
Tested by: markj, pho (previous version)
Reviewed by: alc
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
kernel will now boot on both BIOS and EFI systems without modification.
Equivalent functionality in GENERIC requires making vt(9) the default console
driver, which is probably appropriate at this point.
and working on QEMU. Actually using this script as the regular image
generator, like with the memstick one, will require that the kernel support
EFI too. In particular, the following two things are required:
1. vt(9) be the default console driver
2. vt_efifb and vt_vga be able to coexist usefully in the same kernel
One other note here is that this requires newfs_msdos and mdconfig, which is
really ugly. NetBSD's makefs at least seems to support FAT now. If that
actually works, it should be imported and we can get rid of the mdconfig mess.
using armv7_idcache_wbinv_all, because wbinv_all doesn't broadcast the
operation to other cores. In elf_cpu_load_file() use icache_sync_all()
and explain why it's needed (and why other sync operations aren't).
As part of doing this, all callers of cpu_icache_sync_all() were
inspected to ensure they weren't relying on the old side effect of
doing a wbinv_all along with the icache work.
