Commit Graph

4912 Commits

Author SHA1 Message Date
Emmanuel Vadot
ce70577d7f arm: allwinner: Add pll_mipi to the files 2019-09-28 23:01:23 +00:00
Emmanuel Vadot
f99055394d arm64: allwinner: a64: Add PLL_MIPI
PLL_MIPI is the last important PLL that we missed.
Add support for it.
Since it's one of the possible parent for TCON0 also add this clock
now that we can.
While here add some info about what video related clocks should be
enabled at boot and with what frequency.
2019-09-28 22:14:33 +00:00
Konstantin Belousov
df08823d07 Improve MD page fault handlers.
Centralize calculation of signal and ucode delivered on unhandled page
fault in new function vm_fault_trap().  MD trap_pfault() now almost
always uses the signal numbers and error codes calculated in
consistent MI way.

This introduces the protection fault compatibility sysctls to all
non-x86 architectures which did not have that bug, but apparently they
were already much more wrong in selecting delivered signals on
protection violations.

Change the delivered signal for accesses to mapped area after the
backing object was truncated.  According to POSIX description for
mmap(2):
   The system shall always zero-fill any partial page at the end of an
   object. Further, the system shall never write out any modified
   portions of the last page of an object which are beyond its
   end. References within the address range starting at pa and
   continuing for len bytes to whole pages following the end of an
   object shall result in delivery of a SIGBUS signal.

   An implementation may generate SIGBUS signals when a reference
   would cause an error in the mapped object, such as out-of-space
   condition.
Adjust according to the description, keeping the existing
compatibility code for SIGSEGV/SIGBUS on protection failures.

For situations where kernel cannot handle page fault due to resource
limit enforcement, SIGBUS with a new error code BUS_OBJERR is
delivered.  Also, provide a new error code SEGV_PKUERR for SIGSEGV on
amd64 due to protection key access violation.

vm_fault_hold() is renamed to vm_fault().  Fixed some nits in
trap_pfault()s like mis-interpreting Mach errors as errnos.  Removed
unneeded truncations of the fault addresses reported by hardware.

PR:	211924
Reviewed by:	alc
Discussed with:	jilles, markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D21566
2019-09-27 18:43:36 +00:00
Mark Johnston
b119329d81 Complete the removal of the "wire_count" field from struct vm_page.
Convert all remaining references to that field to "ref_count" and update
comments accordingly.  No functional change intended.

Reviewed by:	alc, kib
Sponsored by:	Intel, Netflix
Differential Revision:	https://reviews.freebsd.org/D21768
2019-09-25 16:11:35 +00:00
Mark Johnston
e8bcf6966b Revert r352406, which contained changes I didn't intend to commit. 2019-09-16 15:04:45 +00:00
Mark Johnston
41fd4b9422 Fix a couple of nits in r352110.
- Remove a dead variable from the amd64 pmap_extract_and_hold().
- Fix grammar in the vm_page_wire man page.

Reported by:	alc
Reviewed by:	alc, kib
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D21639
2019-09-16 15:03:12 +00:00
Ian Lepore
7887a5a140 Apply a runtime patch to the FDT data for imx6 to fix iomuxc problems.
The latest imported FDT data defines a node for an iomuxc-gpr device,
which we don't support (or need, right now) in addition to the usual
iomuxc device.  Unfortunately, the dts improperly assigns overlapping
ranges of mmio space to both devices.  The -gpr device is also a syscon
and simple_mfd device.

At runtime the simple_mfd driver attaches for the iomuxc-gpr node, then
when the real iomuxc driver comes along later, it fails to attach because
it tries to allocate its register space, and it's already partially in
use by the bogus instance of simple_mfd.

This change works around the problem by simply disabling the node for
the iomuxc-gpr device, since we don't need it for anything.
2019-09-15 19:38:15 +00:00
Ian Lepore
3dffab60f3 Make the ti_sysc device quiet. It's an internal utility pseudo-device
that makes the upstream FDT data work right, so we don't need to see a
couple dozen instances of it spam the dmesg at boot time unless it's a
verbose boot.
2019-09-15 01:02:01 +00:00
Ian Lepore
53117a36f8 Include <lock.h>, required to use spinlocks in this code. 2019-09-14 18:20:14 +00:00
Ian Lepore
192122bd62 In am335x_dmtpps, use a spin mutex to interlock between PPS capture and PPS
ioctl(2) handling.  This allows doing the pps_event() work in the polling
routine, instead of using a taskqueue task to do that work.

Also, add PNPINFO, and switch to using make_dev_s() to create the cdev.

Using a spin mutex and calling pps_event() from the polling function works
around the situation which requires more than 2 sets of timecounter
timehands in a single-core system to get reliable PPS capture.  That problem
would happen when a single-core system is idle in cpu_idle() then gets woken
up with an event timer event which was scheduled to handle a hardclock tick.
That processing path would end up calling tc_windup 3 or 4 times between
when the tc polling function was called and when the taskqueue task would
eventually run, and with only two sets of timehands, the th_generation count
would always be too old to allow the captured PPS data to be used.
2019-09-10 22:08:34 +00:00
Mark Johnston
fee2a2fa39 Change synchonization rules for vm_page reference counting.
There are several mechanisms by which a vm_page reference is held,
preventing the page from being freed back to the page allocator.  In
particular, holding the page's object lock is sufficient to prevent the
page from being freed; holding the busy lock or a wiring is sufficent as
well.  These references are protected by the page lock, which must
therefore be acquired for many per-page operations.  This results in
false sharing since the page locks are external to the vm_page
structures themselves and each lock protects multiple structures.

Transition to using an atomically updated per-page reference counter.
The object's reference is counted using a flag bit in the counter.  A
second flag bit is used to atomically block new references via
pmap_extract_and_hold() while removing managed mappings of a page.
Thus, the reference count of a page is guaranteed not to increase if the
page is unbusied, unmapped, and the object's write lock is held.  As
a consequence of this, the page lock no longer protects a page's
identity; operations which move pages between objects are now
synchronized solely by the objects' locks.

The vm_page_wire() and vm_page_unwire() KPIs are changed.  The former
requires that either the object lock or the busy lock is held.  The
latter no longer has a return value and may free the page if it releases
the last reference to that page.  vm_page_unwire_noq() behaves the same
as before; the caller is responsible for checking its return value and
freeing or enqueuing the page as appropriate.  vm_page_wire_mapped() is
introduced for use in pmap_extract_and_hold().  It fails if the page is
concurrently being unmapped, typically triggering a fallback to the
fault handler.  vm_page_wire() no longer requires the page lock and
vm_page_unwire() now internally acquires the page lock when releasing
the last wiring of a page (since the page lock still protects a page's
queue state).  In particular, synchronization details are no longer
leaked into the caller.

The change excises the page lock from several frequently executed code
paths.  In particular, vm_object_terminate() no longer bounces between
page locks as it releases an object's pages, and direct I/O and
sendfile(SF_NOCACHE) completions no longer require the page lock.  In
these latter cases we now get linear scalability in the common scenario
where different threads are operating on different files.

__FreeBSD_version is bumped.  The DRM ports have been updated to
accomodate the KPI changes.

Reviewed by:	jeff (earlier version)
Tested by:	gallatin (earlier version), pho
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D20486
2019-09-09 21:32:42 +00:00
Oleksandr Tymoshenko
c344416ecd [rpi] Inherit framebuffer BPP value from the VideoCore firmware
Instead of using hardcoded bpp of 24, obtain current/configured value
from VideoCore. This solves certain problems with Xorg/Qt apps that
require bpp of 32 to work properly. The mode can be forced by setting
framebuffer_depth value in config.txt

PR:		235363
Submitted by:	Steve Peurifoy <ssw01@mathistry.net>
2019-09-08 09:47:21 +00:00
Ruslan Bukin
50c365c49a Include dwgpio to the build.
Sponsored by:	DARPA, AFRL
2019-09-04 15:55:44 +00:00
Ruslan Bukin
564e82561b o Add support for multi-port instances of Synopsys DesignWare APB GPIO
Controller.
o Rename the driver to dwgpio.

Sponsored by:	DARPA, AFRL
2019-09-04 15:37:24 +00:00
Aleksandr Rybalko
c96574f39c ARM kernel can get RAM regions three ways:
o from FDT;
o from EFI;
o from Linux Boot API (ATAG).
U-Boot may pass RAM info all that 3 ways simultaneously.
We do select between FDT and EFI, but not for ATAG.
So this is not problem fix, but correctness check.

MFC after:	2 weeks
2019-08-31 21:28:06 +00:00
Ed Maste
ec8416f76d exynos5: avoid NULL deref in error case
Reported by:	Dr Silvio Cesare of InfoSect
MFC after:	3 days
MFC with:	r351618
Sponsored by:	The FreeBSD Foundation
2019-08-30 00:36:17 +00:00
Ed Maste
b2f68d35aa exynos5: avoid NULL deref in error case
Reported by:	Dr Silvio Cesare of InfoSect
MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
2019-08-30 00:34:27 +00:00
Konstantin Belousov
a2a0f90654 Centralize __pcpu definitions.
Many extern struct pcpu <something>__pcpu declarations were
copied/pasted in sources.  The issue is that the definition is MD, but
it cannot be provided by machine/pcpu.h due to actual struct pcpu
defined in sys/pcpu.h later than the inclusion of machine/pcpu.h.
This forced the copying when other code needed direct access to
__pcpu.  There is no way around it, due to machine/pcpu.h supplying
part of struct pcpu fields.

To work around the problem, add a new machine/pcpu_aux.h header, which
should fill any needed MD definitions after struct pcpu definition is
completed. This allows to remove copies of __pcpu spread around the
source.  Also on x86 it makes it possible to remove work arounds like
OFFSETOF_CURTHREAD or clang specific warnings supressions.

Reported and tested by:	lwhsu, bcran
Reviewed by:	imp, markj (previous version)
Discussed with:	jhb
Sponsored by:	The FreeBSD Foundation
Differential revision:	https://reviews.freebsd.org/D21418
2019-08-29 07:25:27 +00:00
Warner Losh
7d65d42046 Fix bogusly declared WERRORs in kernel build
Many arm kernel configs bogusly specified WERROR=-Werror. There's no
reason for this because the default is that and there's no reason to
override. These date from a time when we needed to add additional
warning->error suppression. They are obsolete and were cut and paste
propagated from file to file.

Comment out all the WERROR=.... lines in powerpc. They aren't bogus,
but were appropriate for the old defaults for gcc4.2.1. Now that we've
made the policy decision to suppress -Werror by default on these
platforms, it is appropriate to comment these out. People wishing to
fix these errors can still un-comment them out, or say WERROR=-Werror
on the command line.

Fix two instances (cut and paste propagation) of hard-coded -Werror
in x86 code. Replace with ${WERROR} instead. This is a no-op change
except for people who build WERROR=-Wno-error :).

This should fix tinderbox / CI breakage.
2019-08-25 19:39:31 +00:00
Emmanuel Vadot
165b9f965d ti: sdhci: Correct voltage caps
ti,dual-volt property say that the eMMC support 1.8V and 3.3V not 3.0V
Use the correct caps for the mmc stack.
Note that the MMCHS_SD_CAPA register can only be written once after bootup
so if one is using a u-boot compiled with eMMC support (this is the default)
this code is a no-op but just in case someone have u-boot compiled without
eMMC support this make eMMC works when the kernel is booted.

MFC after:	1 week
2019-08-19 14:33:22 +00:00
Emmanuel Vadot
cf2ba452a0 arm64: a37x0_gpio: Use syscon instead of MMIO region
The fdt node for this driver is a simple-mfd and syscon compatible one
meaning that simplemfd will be the driver attached for it. The gpio driver
is attached to the 'gpio' subnode so use syscon_get_handle_default to
obtain the handle of the syscon from the parent device and use this
to read/write to the memory region.

MFC after:	1 week
2019-08-19 14:28:54 +00:00
Emmanuel Vadot
49640386b3 Revert r351130
This driver should use the syscon handle exposed by the parent simple-mfd one.
2019-08-17 19:06:05 +00:00
Emmanuel Vadot
b501fa02e4 arm64: mv: a37x0_gpio: Set the memory to SHAREABLE
Since r349596 the syscon driver will map the memory. Since the gpio/pinctrl
controller wants it too set it to SHAREABLE.
This fix the gpio controller for attaching and so consumer can use it.
Now the sdhci_xenon driver can detect presence of an sdcard and attach
the mmc driver.

MFC after:	1 week
2019-08-16 17:10:38 +00:00
Jeff Roberson
2194393787 Move phys_avail definition into MI code. It is consumed in the MI layer and
doing so adds more flexibility with less redundant code.

Reviewed by:	jhb, markj, kib
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D21250
2019-08-16 00:45:14 +00:00
Emmanuel Vadot
e53a11bef5 arm: allwinner: Set aw_ccu to BUS_PASS_BUS
In r350842 I've switched the bus pass to resource so it matches the other
clock drivers but this cannot work as this drivers is meant to match
the dts node '/clocks' and if we don't do it at this pass simplebus is
catching this node and we cannot attach.
This solve booting on Allwinner boards that are still using /clocks (A20 SoC)

MFC after:	3 days
2019-08-15 18:57:48 +00:00
Warner Losh
c1ab04fce5 Floppy driver really only works on x86
Move the floppy driver to the x86 specific notes file.

Reviewed by: jhb, manu, jhibbits, emaste
Differential Revision: https://reviews.freebsd.org/D21208
2019-08-12 22:58:50 +00:00
Warner Losh
99e1c5ab38 Move sc out of the global file
x86 needs sc, as does sparc64. powerpc doesn't use it by default, but some old
powermac notebooks do not work with vt yet for reasons unknonw. Even so, I've
removed it from powerpc LINT. It's not in daily use there, and the intent is to
100% switch to vt now that it works for that platform to limit support burden.

All the other architectures omit some or all of the screen savers from their
lint config. Move them to the x86 NOTES files and remove the exclusions. This
reduces slightly the number of savers sparc64 compiles, but since they are in
GENERIC, the overage is adequate and if someone reaelly wants to sort them out
in sparc64 they can sweat the details and the testing.

Reviewed by: jhb (earlier version), manu (earlier version), jhibbits
Differential Revision: https://reviews.freebsd.org/D21233
2019-08-12 22:58:44 +00:00
Ian Lepore
bc38882760 Revert r350841. I didn't realize that on this chip, reading the interrupt
status register clears pending interrupts.  By moving that code out of the
interrupt handler into a taskqueue task, I effectively created an interrupt
storm by returning from the handler with the interrupt source still active.

We'll have to find a different solution for this driver's need to sleep
in an ithread context.
2019-08-11 23:19:56 +00:00
Ian Lepore
2a002a0549 Remove use of intr_config_hook from the am335x_pmic and tda19988 drivers.
Long ago this was needed, but now low-level i2c controller drivers cleverly
defer attachment of the bus until interrupts are enabled (if they require
interrupts to function), so that every i2c slave device doesn't have to.
2019-08-10 20:08:37 +00:00
Ian Lepore
a51f005289 The am335x_ehrpwm driver now requires the pwmbus_if interface, add it. 2019-08-10 20:05:15 +00:00
Emmanuel Vadot
d27bec74fe allwinner: Add support to min/max in aw_clk_frac
The Fractionals clock in Allwinner device have some min/max frequencies
that they can do.
Add support for it.
2019-08-10 19:02:50 +00:00
Emmanuel Vadot
e727f392bf Remove some duplicate code that end up in r350844 2019-08-10 18:58:25 +00:00
Emmanuel Vadot
8c8b86922a allwinner: Add a new clock aw_clk_m
We used the aw_clk_nm clock for clock with only one divider factor
and used a fake multiplier factor. This cannot work properly as we
end up writing the "fake" factor to the register (and so always set
the LSB to 1).
Create a new clock for those.
The reason for not using the clk_div clock is because those clocks are
a bit special. Since they are (almost) all related to video we also need
to set the parent clock (the main PLL) to a frequency that they can support.
As the main PLL have some minimal frequency that they can support we need to
be able to set the main PLL to a multiple of the desired frequency.
Let say you want to have a 71Mhz pixel clock (typical for a 1280x800 display)
and the main PLL cannot go under 192Mhz, you need to set it to 3 times the
desired frequency and set the divider to 3 on the hdmi clock.
So this also introduce the CLK_SET_ROUND_MULTIPLE flag that allow for this kind
of scenario.
2019-08-10 18:50:37 +00:00
Emmanuel Vadot
cfc8861b06 allwinner: Rework the BUS_PASS on drivers
- Put all clock and control unit driver in BUS_PASS_RESOURCE except
  for the DE2 CCU as it needs the main CCU to be available.
- Use BUS_PASS_CPU for a20_cpu_cfg as it makes more sense.
- For aw_syscon use SCHEDULER pass as we need it early for drivers
  that attach in BUS_PASS_SUPPORTDEV
- For the rest we can use BUS_PASS_SUPPORTDEV
2019-08-10 17:58:30 +00:00
Ian Lepore
7596e192fb When responding to an interrupt in the am335x_pmic driver, use a taskqueue
thread to do the work that involves i2c IO, which sleeps while the IO is
in progress.
2019-08-10 17:48:11 +00:00
Ian Lepore
0ad8b8edc4 Garbage collect the no-longer-necessary MAX_IIC_DATA_SIZE (there is not a
buffer allocated at that fixed size anymore).
2019-08-10 17:28:14 +00:00
Ian Lepore
3f24d465fd Switch the am335x_pmic driver to using iicdev_readfrom/writeto.
PR:		239697
Submitted by:	Chuhong Yuan
2019-08-10 17:14:35 +00:00
Xin LI
d4565741c6 Remove gzip'ed a.out support.
The current implementation of gzipped a.out support was based
on a very old version of InfoZIP which ships with an ancient
modified version of zlib, and was removed from the GENERIC
kernel in 1999 when we moved to an ELF world.

PR:		205822
Reviewed by:	imp, kib, emaste, Yoshihiro Ota <ota at j.email.ne.jp>
Relnotes:	yes
Differential Revision:	https://reviews.freebsd.org/D21099
2019-07-30 05:13:16 +00:00
Emmanuel Vadot
0ce33c042e arm: ti: cpsw: Check the new slave node address
Since DTS from >= Linux 5.0 the slave address are relative to the parent
node address and aren't the full ones.
Check both so the cpsw driver can find the phy id.
2019-07-29 10:42:15 +00:00
Emmanuel Vadot
7be976a88e arm: ti: Get the hwmods property either from the node or the parent
r350229 changed the code to lookup the ti,hwmods property in the parent
as it's now like that in the DTS from >= Linux 5.0, allow the property
to be also in the node itself so we can boot with an older DTB.

Reported by:	"Dr. Rolf Jansen" <rj@obsigna.com>
2019-07-29 10:40:51 +00:00
Warner Losh
0d212ef0cd Remove support for kernel.tramp and kernel.tramp.gz
Nothing uses these anymore. They were for super small armv4 boards without
uboot. We removed armv4 support before 13.0, but neglected to garbage collect
this at the same time. Today, both flavors of armv5 kernels (mv and ralink) boot
via uboot which has its own compression scheme for boards that need it.

Note: OLDFILES has not been updated beacuse installkernel will move the whole
directory out of the way before installing the new kernel.

Differential Revision: https://reviews.freebsd.org/D21072
2019-07-27 17:24:19 +00:00
Emmanuel Vadot
1f3392ed10 arm: Fix TEGRA124 kernel
Since r350162 device syscon is needed for sdhci driver.
Add it to the config file.

Reported by:	dim
2019-07-27 15:04:10 +00:00
Emmanuel Vadot
b9305a86e1 arm: ti: Add a driver for ti,sysc bus
ti,sysc is a simple-bus like driver.
Add a driver for it so child nodes can attach.
2019-07-22 21:55:33 +00:00
Emmanuel Vadot
04132e0157 arm: ti: Get the hwmods property from the parent node
Since the Linux 5.0 dts the ti,hwmods property is on the parent
ti.sysc node.
2019-07-22 21:53:58 +00:00
John Baldwin
c18ca74916 Don't pass error from syscallenter() to syscallret().
syscallret() doesn't use error anymore.  Fix a few other places to permit
removing the return value from syscallenter() entirely.
- Remove a duplicated assertion from arm's syscall().
- Use td_errno for amd64_syscall_ret_flush_l1d.

Reviewed by:	kib
MFC after:	1 month
Sponsored by:	DARPA
Differential Revision:	https://reviews.freebsd.org/D2090
2019-07-15 21:25:16 +00:00
Emmanuel Vadot
e52acf6a46 Remove duplicated device firmware entry in generic arm kernel config added in r333191
Submitted by:	Daniel Engberg (daniel.engberg.lists@pyret.net)
MFC after:	3 days
Differential Revision:	https://reviews.freebsd.org/D20680
2019-07-15 15:07:55 +00:00
Konstantin Belousov
30b3018d48 Provide protection against starvation of the ll/sc loops when accessing userpace.
Casueword(9) on ll/sc architectures must be prepared for userspace
constantly modifying the same cache line as containing the CAS word,
and not loop infinitely.  Otherwise, rogue userspace livelocks the
kernel.

To fix the issue, change casueword(9) interface to return new value 1
indicating that either comparision or store failed, instead of relying
on the oldval == *oldvalp comparison.  The primitive no longer retries
the operation if it failed spuriously.  Modify callers of
casueword(9), all in kern_umtx.c, to handle retries, and react to
stops and requests to terminate between retries.

On x86, despite cmpxchg should not return spurious failures, we can
take advantage of the new interface and just return PSL.ZF.

Reviewed by:	andrew (arm64, previous version), markj
Tested by:	pho
Reported by:	https://xenbits.xen.org/xsa/advisory-295.txt
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
Differential revision:	https://reviews.freebsd.org/D20772
2019-07-12 18:43:24 +00:00
Ian Lepore
b522e138c5 De-pollute arm's sysarch.h.
Instead of including stdint.h for uintptr_t, include sys/_types.h and use
__types for everything that isn't a native C keyword type.

Remove the #include of cdefs.h.  It appears after the include of armreg.h
which has a precondition of cdefs.h being included before it, so everyone
including sysarch.h is already including cdefs.h.  (When armv5 support
goes away, there will be no need include armreg.h here either.)

Unfortunately, the unprefixed struct member names "addr" and "len" cannot
be changed, because 3rd-party software is relying on them (libcompiler_rt
is one known consumer).
2019-07-10 14:34:52 +00:00
Mark Johnston
eeacb3b02f Merge the vm_page hold and wire mechanisms.
The hold_count and wire_count fields of struct vm_page are separate
reference counters with similar semantics.  The remaining essential
differences are that holds are not counted as a reference with respect
to LRU, and holds have an implicit free-on-last unhold semantic whereas
vm_page_unwire() callers must explicitly determine whether to free the
page once the last reference to the page is released.

This change removes the KPIs which directly manipulate hold_count.
Functions such as vm_fault_quick_hold_pages() now return wired pages
instead.  Since r328977 the overhead of maintaining LRU for wired pages
is lower, and in many cases vm_fault_quick_hold_pages() callers would
swap holds for wirings on the returned pages anyway, so with this change
we remove a number of page lock acquisitions.

No functional change is intended.  __FreeBSD_version is bumped.

Reviewed by:	alc, kib
Discussed with:	jeff
Discussed with:	jhb, np (cxgbe)
Tested by:	pho (previous version)
Sponsored by:	Netflix
Differential Revision:	https://reviews.freebsd.org/D19247
2019-07-08 19:46:20 +00:00
Warner Losh
4924bcd36e Implement missing MMCBR ivars
All MMCBR bridges have to implement all the MMCBR variables. This
implements them for everybody that currently doesn't.

A common routine for this should be written.
2019-07-04 14:15:04 +00:00