ePWM is controlled by sysctl nodes dev.am335x_pwm.N.period,
dev.am335x_pwm.N.dutyA and dev.am335x_pwm.N.dutyB that controls
PWM period and duty cycles for channels A and B respectively.
Period and duty cycle are measured in clock ticks. Default
clock frequency for AM335x PWM subsystem is 100MHz
allowed to ignore the probe_only argument of its member functions solely
because in the C language, the file accessor methods open and return a file
descriptor and reading of the data is optional. In shell, the file accessor
methods return data on stdout and that data should not be ignored (large
files could block execution).
So, we must adhere to the probe_only flags and in some cases (in the case of
FTP, for example) change the `get' strategy to simply test existence and
return an appropriate status.
This was required because the up-coming package management stuff makes heavy
use of the probe_only argument to try different package suffixes. Every
media access module must implement $probe_only for the `get' accessor.
Add MachineBasicBlock::addLiveIn().
This function adds a live-in physical register to an MBB and ensures
that it is copied to a virtual register immediately.
Pull in r185615 from llvm trunk:
Live-in copies go *after* EH_LABELs.
This will soon be tested by exception handling working at all.
Pull in r185617 from llvm trunk:
Simplify landing pad lowering.
Stop using the ISD::EXCEPTIONADDR and ISD::EHSELECTION when lowering
landing pad arguments. These nodes were previously legalized into
CopyFromReg nodes, but that never worked properly because the
CopyFromReg node weren't guaranteed to be scheduled at the top of the
basic block.
This meant the exception pointer and selector registers could be
clobbered before being copied to a virtual register.
This patch copies the two physical registers to virtual registers at
the beginning of the basic block, and lowers the landingpad instruction
directly to two CopyFromReg nodes reading the *virtual* registers. This
is safe because virtual registers don't get clobbered.
A future patch will remove the ISD::EXCEPTIONADDR and ISD::EHSELECTION
nodes.
Together, these changes fix llvm PR 16038 ('qt4 webcore file results in
"Bad machine code: Using an undefined physical register"'), and should
make it possible again to compile the www/qt4-webkit port again on the
i386 arch, without using a CPUTYPE=i686 or higher setting.
It's not enabled by default in net80211 so this is a no-op unless
if you enable it (ifconfig wlan0 powersave).
Tested:
* iwn0: <Intel WiFi Link 5100> mem 0xf4300000-0xf4301fff irq 17 at device 0.0 on pci3
TODO:
* .. test on all the other NICs
* See if I have to disable it during scan and such
* Make it configurable live, rather than only after it's done its initial
receive calibration.
dereferencing, when checking for SO_REUSEPORT option (and SO_REUSEADDR
for multicast), INP_REUSEPORT flag was introduced to cache the socket
option. It was decided then that one flag would be enough to cache
both SO_REUSEPORT and SO_REUSEADDR: when processing SO_REUSEADDR
setsockopt(2), it was checked if it was called for a multicast address
and INP_REUSEPORT was set accordingly.
Unfortunately that approach does not work when setsockopt(2) is called
before binding to a multicast address: the multicast check fails and
INP_REUSEPORT is not set.
Fix this by adding INP_REUSEADDR flag to unconditionally cache
SO_REUSEADDR.
PR: 179901
Submitted by: Michael Gmelin freebsd grem.de (initial version)
Reviewed by: rwatson
MFC after: 1 week
r252680:
Fix SIM lock not owned panic
The CAM locking requirements of registering an async
callback has changed so the SIM lock must be held. Remove
code that explicitly dropped the lock around the register.
Also return CAM_SEL_TIMEOUT instead of CAM_TID_INVALID
for bad targets to avoid a lot console spam during bus
scans.
MFC after: 1 month
This commit is primarily a significant cleanup to the interrupt
allocation code that had gotten a bit jumbled from having to
support per-vq MSIX, shared MSIX, MSI, and legacy style interrupts.
Contains projects/virtio commits:
r246064:
virtio_pci: Rewrite allocation of interrupts
r246065:
virtio_pci: Remove spaces before a tab
r246066:
virtio_pci: Dynamically allocate the virtqueue array
r246304:
virtio_pci: Clean up after failed virtqueue alloc attempt
r246305:
virtio_pci: Move no interrupt check into the PCI interrupt handlers
r246308:
virtio_pci: Remove unused variable
MFC after: 1 month
Minor changes to the network driver. A multiqueue driver that is
a significant rewrite will be in merged shortly.
Contains projects/virtio commits:
r246058:
vtnet: Move an mbuf ASSERT to the calling function
r246059:
vtnet: Tweak ASSERT message
MFC after: 1 month
Contains projects/virtio commits:
r245717:
virtio_balloon: Make the softc lock a regular mutex
r245718:
virtio_balloon: Remove two unuseful ASSERTs
r245719:
virtio_balloon: More verbose ASSERT messages
r245720:
virtio_balloon: Simplify lowmem handling in vtballoon_inflate()
r252530:
virtio_balloon: Use just a kthread instead of dedciated kproc
r252568:
virtio_balloon: Need to use kthread_exit() after r252530
MFC after: 1 month
The notable changes of this commit are support for disk resizing
and chases updates to the spec regarding write caching.
Contains projects/virtio commits:
r245713:
virtio_blk: Replace __FUNCTION__ with __func__
r245714:
virtio_blk: Use more consistent mutex name
r245715:
virtio_blk: Print device name too if failed to reinit during dump
r245716:
virtio_blk: Remove an unuseful ASSERT
r245723:
virtio_blk: Record the vendor and device information
r245724:
virtio_blk: Add resize support
r245726:
virtio_blk: More verbose ASSERT messages
r245730:
virtio_blk: Tweak resize announcement message
r246061:
virtio_blk: Do not always read entire config
r246062:
virtio_blk: Use topology to set the stripe size/offset
r246307:
virtio_blk: Correct stripe offset calculation
r246063:
virtio_blk: Add support for write cache enable feature
r246303:
virtio_blk: Expand a comment
r252529:
virtio_blk: Improve write cache handling
r252681:
virtio_blk: Remove unneeded curly braces
MFC after: 1 month
Contains projects/virtio commits:
r245709:
Each VirtIO device was scheduling its own taskqueue(9) to do the
off-level interrupt handling. ithreads(9) is the more nature way
to do this. The primary motivation for this work to better support
network multiqueue.
r245710:
virtio: Change virtqueue intr handlers to return void
r245711:
virtio_blk: Remove interrupt taskqueue
r245721:
vtnet: Remove interrupt taskqueue
r245722:
virtio_scsi: Remove interrupt taskqueue
r245747:
vtnet: Remove taskqueue fields missed in r245721
MFC after: 1 month
that looks for interface skips interfaces that are not UP. We need to call
dhclient-script PREINIT before we call discover_interfaces(), so the script has
a chance to bring the interface UP.
Reported by: alfred
pmap_remove_all()
This flag should already be cleared by pmap_nuke_pv()
Submitted by: Zbigniew Bodek <zbb@semihalf.com>
Sponsored by: The FreeBSD Foundation, Semihalf
When doing pmap_enter_locked(), enable write permission only when access
type indicates attempt to write. Otherwise, leave the page read only but
mark it writable in pv_flags.
This will result in:
1. Marking page writable during pmap_enter() but only when ensured that it
will be written right away so that we will not get redundant permissions
fault on write attempt.
2. Keeping page read only when it is permitted to be written but there was
no actual write attempt. Hence, we will get permissions fault on write
access and mark page writable in pmap_fault_fixup() what will indicate
modification status.
Submitted by: Zbigniew Bodek <zbb@semihalf.com>
Sponsored by: The FreeBSD Foundation, Semihalf
This is an AR7240 based device with an AR9285 on-board.
I've tested the initial boot and wifi support; however at the moment
the ethernet switch driver doesn't seem to be picking up carrier on the
active ethernet port. Basic flood pinging works however, so I think
we're on the right track.
Thank you to Adrian Woodley <adrian@diskworld.com.au> for purchasing me
one of these devices to bootstrap FreeBSD-HEAD on.
in the ithread code where we could lose ithread interrupts if
intr_event_schedule_thread() is called while the ithread is already
running. Effectively memory writes could be ordered incorrectly
such that the unatomic write of 0 to ithd->it_need (in ithread_loop)
could be delayed until after it was set to be triggered again by
intr_event_schedule_thread().
This was particularly a big problem for CAM because CAM optimizes
scheduling of ithreads such that it only signals camisr() when it
queues to an empty queue. This means that additional completion
events would not unstick CAM and quickly lead to a complete lockup
of the CAM stack.
To fix this use atomics in all places where ithd->it_need is accessed.
Submitted by: delphij, mav
Obtained from: TrueOS, iXsystems
MFC After: 1 week
users to set the MAC address for a device.
Clean up some obsolete code in pci_virtio_net.c
Allow an error return from a PCI device emulation's init routine
to be propagated all the way back to the top-level and result in
the process exiting.
Submitted by: Dinakar Medavaram dinnu sun at gmail (original version)
would sometimes result in a corrupted file was reported via email.
This problem appears to have been caused by r251719 (reverting
r251719 fixed the problem). Although I have not been able to
reproduce this problem, I suspect it is caused by another thread
increasing np->n_size after the mtx_unlock(&np->n_mtx) but before
the vnode_pager_setsize() call. Since the np->n_mtx mutex serializes
updates to np->n_size, doing the vnode_pager_setsize() with the
mutex locked appears to avoid the problem.
Unfortunately, vnode_pager_setsize() where the new size is smaller,
cannot be called with a mutex held.
This patch returns the semantics to be close to pre-r251719 such that the
call to the vnode_pager_setsize() is only delayed until after the mutex is
unlocked when np->n_size is shrinking. Since the file is growing
when being written, I believe this will fix the corruption.
Reported by: David G. Lawrence (dg@dglawrence.com)
Tested by: David G. Lawrence (pending, to happen soon)
Reviewed by: kib
MFC after: 1 week
Ensure that d_delmaxsize is always set, removing init to 0 which could cause
future issues if use cases change.
Allow kern.cam.da.X.delete_max (which maps to d_delmaxsize) to be increased
up to the calculated max after being reduced.
MFC after: 1 day
X-MFC-With: r249940
reset by pmap_page_init() right after being initialized in vm_page_initfake().
The statement above is with reference to the amd64 implementation of
pmap_page_init().
Fix this by calling 'pmap_page_init()' in 'vm_page_initfake()' before changing
the 'memattr'.
Reviewed by: kib
MFC after: 2 weeks
Force UMA zone to allocate service structures like slabs using own
allocator. uma_debug code performs atomic ops on uma_slab_t fields
and safety of this operation is not guaranteed for write-back caches
bit when looking up the vm_page associated with the superpage's physical
address.
If the caching attribute for the mapping is write combining or write protected
then the PG_PDE_PAT bit will be set and thus cause an 'off-by-one' error
when looking up the vm_page.
Fix this by using the PG_PS_FRAME mask to compute the physical address for
a superpage mapping instead of PG_FRAME.
This is a theoretical issue at this point since non-writeback attributes are
currently used only for fictitious mappings and fictitious mappings are not
subject to promotion.
Discussed with: alc, kib
MFC after: 2 weeks
Properly handle input lines containing NUL characters such that pgets()
accurately fills the read buffer.
Callers of pgets() still mis-process the buffer contents if the read line
contains NUL characters, but this at least makes pgets() accurate.
Make it so that 'patch < FUBAR' and 'patch -i FUBAR' operate the same.
The former makes a copy of stdin, but was not accurately putting the
content of stdin into a temp file. This lead to the undercounting
the number of lines in hunks containing NUL characters when reading
from stdin. Thus resulting in "unexpected end of file in patch" errors.
Revoke all capability rights from STDIN and allow only for write to STDOUT and
STDERR. All those descriptors are redirected to /dev/null.
Reviewed by: brooks
Sponsored by: The FreeBSD Foundation
Once PID is written to the pidfile, revoke all capability rights.
We just want to keep the pidfile open.
Reviewed by: brooks
Sponsored by: The FreeBSD Foundation
