Before every wait for FIFO interrupt set how much data/space do we
want to see there. Previous code was not using it for receive, as
result aggregating interrupts only within processing latency. The
new code needs only one interrupt per transfer per FIFO length.
On my Dell XPS 13 9310 with iichid(4) touchscreen and touchpad this
reduces the interrupt rate per device down to 2 per sample or 16-20
per second when idle and 120-160 per second when actively touched.
MFC after: 1 month
Amdgpu driver does a lot of memory allocations in FPU-protected sections
of code for certain display cores, e.g. for DCN30. This does not work
currently on FreeBSD as its malloc function can not be run within a
critical section. Allocate memory for FPU context to overcome such
restriction.
Sponsored by: Serenity Cyber Security, LLC
Reviewed by: manu (previous version), markj
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D42822
acpi_dev_present detects that a given ACPI device is present based on
Hardware ID, Unique ID and Hardware Revision of the device.
Sponsored by: Serenity Cyber Security, LLC
Reviewed by: manu
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D42823
It does a Read-Modify-Write operation using clear and set bitmasks on
PCI Express Capability Register at pos. As certain PCI Express
Capability Registers are accessed concurrently in RMW fashion, hence
require locking which is handled transparently to the caller.
Sponsored by: Serenity CyberSecurity, LLC
Reviewed by: manu, bz
MFC after: 1 week
MFC TODO: Move pcie_cap_lock to bottom to preserve KBI compatibility
Differential Revision: https://reviews.freebsd.org/D42821
We assume that backlight (in Linux term) is always "native".
Also stub acpi_video_register_backlight()
Sponsored by: Serenity Cyber Security, LLC
Reviewed by: manu, bz
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D42814
and bitmap_shift_right() functions to linux/bitmap.h
They perform calculation of two bitmaps intersection,
copying the contents of u32 array of bits to bitmap and
logical right shifting of the bits in a bitmap.
Sponsored by: Serenity Cyber Security, LLC
Reviewed by: manu
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D42812
Cancel a work not waiting for it to finish.
Sponsored by: Serenity Cyber Security, LLC
Reviewed by: manu, kib
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D42811
Linux uses it only if SHRINKER_DEBUG config option is enabled. Ignore it.
Sponsored by: Serenity Cyber Security, LLC
Reviewers: manu, bz
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D42809
ida_alloc_min() allocates an unused ID. between min and INT_MAX.
While here allow end parameter of ida_simple_get() be larger than
INT_MAX. Linux caps the value to INT_MAX.
Sponsored by: Serenity Cyber Security, LLC
Reviewers: manu, bz
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D42806
It is implemented like ktime_get_raw_ns() function but uses less
precise getnanouptime() call.
Sponsored by: Serenity Cyber Security, LLC
Reviewed by: manu, bz
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D42804
And move it along BUILD_BUG family in to
linux/build_bug.h to match Linux.
Sponsored by: Serenity Cyber Security, LLC
Reviewed by: manu, bz
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D42800
sys/rman.h defines `resource` structure which conflicts with the Linux
structure of the same name. To fix that remove reference to sys/rman.h
from linux/pci.h and move resource management code to linux_pci.c.
Update consumers which were depending on linux/pci.h pollution.
No functional changes intended.
Sponsored by: Serenity Cyber Security, LLC
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D42792
- Change vm_page_reclaim_contig[_domain] to return an errno instead
of a boolean. 0 indicates a successful reclaim, ENOMEM indicates
lack of available memory to reclaim, with any other error (currently
only ERANGE) indicating that reclamation is impossible for the
specified address range. Change all callers to only follow
up with vm_page_wait* in the ENOMEM case.
- Introduce vm_domainset_iter_ignore(), which marks the specified
domain as unavailable for further use by the iterator. Use this
function to ignore domains that can't possibly satisfy a physical
allocation request. Since WAITOK allocations run the iterators
repeatedly, this avoids the possibility of infinitely spinning
in domain iteration if no available domain can satisfy the
allocation request.
PR: 274252
Reported by: kevans
Tested by: kevans
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D42706
Remove extra acpi_UserNotify() call per event. Filter duplicate
notifications received from ACPI without actual status change.
Without this on my Dell XPS 13 9310 I saw 4 devd events for either
open or close, now only one.
MFC after: 1 month
My previous commit by reducing precision reduced the sampling rate
from 60Hz to 40Hz on idle system. Return it back to 60-80Hz range,
that should be good for mouse smoothness on 60Hz displays.
MFC after: 1 months
At least on my Tiger Lake-LP queue depth detection failed before the
ig4iic_set_config() call, resulting in no FIFO use. Moving it after
solves the problem, getting proper 64 bytes size.
On my Dell XPS 13 9310 with iichid(4) touchscreen and touchpad this
by few times reduces context switch rate in the driver, and probably
also improves the I2C bus utilization.
MFC after: 1 month
It should make pause interval less strict.
While there, add cpu_spinwait() into a tight spin wait loop to burn
less power and let other SMT thread work more.
MFC after: 1 month
In sampling mode some devices return same data indefinitely even if
there is nothing to report. Previous idle hysteresis implementation
activated only when device returned no data, so some devices ended up
polled at fast rate all the time. This new implementation compares
each new report with the previous, and, if they are identical, after
reaching threshold also drop sampling rate to slow.
On my Dell XPS 13 9310 with iichid(4) touchscreen and touchpad this
reduces idle power consumption by ~0.5W by reducing number of context
switches in the driver from ~4000 to ~700 per second when not touched.
MFC after: 1 month
If vfs.nfs.nfs_directio_enable is set non-zero (the default is
zero) and a file on an NFS mount is read after being opened
with O_DIRECT | O_ RDONLY, a call to nfsm_mbufuio() calls
copyout() without checking for an error return.
If copyout() returns EFAULT, this would not work correctly.
Only the call path
VOP_READ()->ncl_readrpc()->nfsrpc_read()->nfsrpc_readrpc()
will do this and the error return for EFAULT will
be returned back to VOP_READ().
This patch adds the error check to nfsm_mbufuio().
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D43160
Namely, switch from vm_fault_quick_hold() to pmap_extract() KPI to
translate gpa to hpa. Assert that the looked up hpa belongs to the wired
page, as it should be for the VM which is configured for pass-throu
(this is theoretically a restriction that could be removed on newer
DMARs).
Noted by: alc
Reviewed by: alc, jhb, markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D43140
Provide accessor functions to all 12 possible TCP header
flags for userspace too.
Reviewed By: zlei
MFC after: 2 weeks
Sponsored by: Netapp, Inc.
Differential Revision: https://reviews.freebsd.org/D43152
Start scaling arrays dynamically instead of using MAXCPU, resulting in
extra allocations on startup but reducing the overall memory footprint.
For the static single CPU mask we provide two versions to further save
memory depending on a low or high CPU count system. The threshold to
switch is currently at 128 CPUs on 64bit platforms.
More detailed comments on the implementations can be found in the code.
If I am not wrong on a MAXCPU=65536 system the memory footprint should
roughly go down from 512M to 1.5M for the static single CPU mask.
Submitted by: olce (most of this final version)
Sponsored by: The FreeBSD Foundation
PR: 274316
Differential Revision: https://reviews.freebsd.org/D42345
Replace ieee80211_ie_vhtcap with ieee80211_vht_cap and
ieee80211_ie_vht_operation with ieee80211_vht_operation.
The "ie" version has the two bytes type/length at the beginning which
we did not actually use as such (the one place doing did just as unused
extra work).
Using the non-"ie" versions allows us to re-use them on shared code.
Using an enum helps us to not accidentally get unsuppored or unhandled
values tough we cannot use it in the struct as we need to ensure the
field width.
ieee80211_vht_operation is guarded by _KERNEL/WANT_NET80211. While the
header is supposed to be exported to user land historically, software
such as wpa bring their own structure definitions. For in-tree usage
it is only ifconfig which really cares (at least for now).
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: adrian (earlier), cc
Differential Revision: https://reviews.freebsd.org/D42901
It is possible that we call ieee80211_new_state_locked() again before
a previous task finished to completion (not run yet or unlocked in
between) since 5efea30f03 (and follow-up).
In either case we would overwrite the new state and argument in the vap.
While most drivers somehow deal with that (or not), LinuxKPI 802.11 compat
code has KASSERTs to keep net80211, LinuxKPI and driver/firmware state in
sync and they may trigger due to a missing transition or more likely a
changed ni/lsta.
Enhance the wlandebug +state logging for these cases so they
are easier to debug.
While here remove the unconditional logging to the message buffer;
it has been here for a good decade but not helped to actually identify
and sort the problem.
Sponsored by: The FreeBSD Foundation
MFC after: 3 days
Reviewed by: cc
Differential Revision: https://reviews.freebsd.org/D42560
