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Heiner Kallweit says:
====================
net: phy: add macros for PHYID matching in PHY driver config
Add macros for PHYID matching to be used in PHY driver configs.
By using these macros some boilerplate code can be avoided.
Use them initially in the Realtek PHY drivers.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Use new macros for PHYID matching to avoid boilerplate code.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add macros for PHYID matching to be used in PHY driver configs.
By using these macros some boilerplate code can be avoided.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit says:
====================
net: phy: further phylib simplifications after recent changes to the state machine
After the recent changes to the state machine phylib can be further
simplified (w/o having to make any assumptions).
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Now that phy_mac_interrupt() doesn't call phy_change() any longer it's
called from phy_interrupt() only. Therefore phy_interrupt_is_valid()
returns true always and the check can be removed.
In case of PHY_HALTED phy_interrupt() bails out immediately,
therefore the second check for PHY_HALTED including the call to
phy_disable_interrupts() can be removed.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When using phy_mac_interrupt() the irq number is set to
PHY_IGNORE_INTERRUPT, therefore phy_interrupt_is_valid() returns false.
As a result phy_change() effectively just calls phy_trigger_machine()
when called from phy_mac_interrupt() via phy_change_work(). So we can
call phy_trigger_machine() from phy_mac_interrupt() directly and
remove some now unneeded code.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
State PHY_CHANGELINK isn't needed here, we can call the state machine
directly. We just have to remove the check for phy_polling_mode() to
make this work also in interrupt mode. Removing this check doesn't
cause any overhead because when not polling the state machine is
called only if required by some event.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit says:
====================
net: phy: replace PHY_HAS_INTERRUPT with a check for config_intr and ack_interrupt
Flag PHY_HAS_INTERRUPT is used only here for this small check. I think
using interrupts isn't possible if a driver defines neither
config_intr nor ack_interrupts callback. So we can replace checking
flag PHY_HAS_INTERRUPT with checking for these callbacks.
This allows to remove this flag from all driver configs.
v2:
- add helper for check in patch 1
- remove PHY_HAS_INTERRUPT from all drivers, not only Realtek
- remove flag PHY_HAS_INTERRUPT completely
v3:
- rebase patch 2
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Now that flag PHY_HAS_INTERRUPT has been replaced with a check for
callbacks config_intr and ack_interrupt, we can remove setting this
flag from all driver configs.
Last but not least remove flag PHY_HAS_INTERRUPT completely.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Flag PHY_HAS_INTERRUPT is used only here for this small check. I think
using interrupts isn't possible if a driver defines neither
config_intr nor ack_interrupts callback. So we can replace checking
flag PHY_HAS_INTERRUPT with checking for these callbacks.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 37c8a5fafa3b ("kbuild: consolidate Devicetree dtb build rules")
moved the location of 'dtbs_install' target which caused dtbs to not be
installed when building debian package with 'bindeb-pkg' target. Update
the builddeb script to use the same logic that determines if there's a
'dtbs_install' target which is presence of the arch dts directory. Also,
use CONFIG_OF_EARLY_FLATTREE instead of CONFIG_OF as that's a better
indication of whether we are building dtbs.
This commit will also have the side effect of installing dtbs on any
arch that has dts files. Previously, it was dependent on whether the
arch defined 'dtbs_install'.
Fixes: 37c8a5fafa3b ("kbuild: consolidate Devicetree dtb build rules")
Reported-by: Nuno Gonçalves <nunojpg@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This reverts commit 6147b1cf19651c7de297e69108b141fb30aa2349.
The reverted patch results in attempted write access to the source
repository, even if that repository is mounted read-only.
Output from "strace git status -uno --porcelain":
getcwd("/tmp/linux-test", 129) = 16
open("/tmp/linux-test/.git/index.lock", O_RDWR|O_CREAT|O_EXCL|O_CLOEXEC, 0666) =
-1 EROFS (Read-only file system)
While git appears to be able to handle this situation, a monitored
build environment (such as the one used for Chrome OS kernel builds)
may detect it and bail out with an access violation error. On top of
that, the attempted write access suggests that git _will_ write to the
file even if a build output directory is specified. Users may have the
reasonable expectation that the source repository remains untouched in
that situation.
Fixes: 6147b1cf19651 ("scripts/setlocalversion: git: Make -dirty check more robust"
Cc: Genki Sky <sky@genki.is>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Since commit b41d920acff8 ("kbuild: deb-pkg: split generating packaging
and build"), the build version of the kernel contained in a deb package
is too low by 1.
Prior to the bad commit, the kernel was built first, then the number
in .version file was read out, and written into the debian control file.
Now, the debian control file is created before the kernel is actually
compiled, which is causing the version number mismatch.
Let the mkdebian script pass KBUILD_BUILD_VERSION=${revision} to require
the build system to use the specified version number.
Fixes: b41d920acff8 ("kbuild: deb-pkg: split generating packaging and build")
Reported-by: Doug Smythies <dsmythies@telus.net>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Tested-by: Doug Smythies <dsmythies@telus.net>
The current SED_CONFIG_EXP could match to comment lines in config
fragment files, especially when CONFIG_PREFIX_ is empty. For example,
Buildroot uses empty prefixing; starting symbols with BR2_ is just
convention.
Make the sed expression more robust against false positives from
comment lines. The new sed expression matches to only valid patterns.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Petr Vorel <petr.vorel@gmail.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Same change as made to sctp_intl_store_reasm().
To be fully correct, an iterator has an undefined value when something
like skb_queue_walk() naturally terminates.
This will actually matter when SKB queues are converted over to
list_head.
Formalize what this code ends up doing with the current
implementation.
Signed-off-by: David S. Miller <davem@davemloft.net>
To be fully correct, an iterator has an undefined value when something
like skb_queue_walk() naturally terminates.
This will actually matter when SKB queues are converted over to
list_head.
Formalize what this code ends up doing with the current
implementation.
Signed-off-by: David S. Miller <davem@davemloft.net>
Eliminate the assumption that SKBs and SKB list heads can
be cast to eachother in SKB list handling code.
This change also appears to fix a bug since the list->next pointer is
sampled outside of holding the SKB queue lock.
Signed-off-by: David S. Miller <davem@davemloft.net>
Instead of direct SKB list pointer accesses.
The loops in this function had to be rewritten to accommodate this
more easily.
The first loop iterates now over the target list in the outer loop,
and triggers an mmc data operation when the per-operation limits are
hit.
Then after the loops, if we have any residue, we trigger the last
and final operation.
For the page aligned workaround, where we have to copy the read data
back into the original list of SKBs, we use a two-tiered loop. The
outer loop stays the same and iterates over pktlist, and then we have
an inner loop which uses skb_peek_next(). The break logic has been
simplified because we know that the aggregate length of the SKBs in
the source and destination lists are the same.
This change also ends up fixing a bug, having to do with the
maintainance of the seg_sz variable and how it drove the outermost
loop. It begins as:
seg_sz = target_list->qlen;
ie. the number of packets in the target_list queue. The loop
structure was then:
while (seq_sz) {
...
while (not at end of target_list) {
...
sg_cnt++
...
}
...
seg_sz -= sg_cnt;
The assumption built into that last statement is that sg_cnt counts
how many packets from target_list have been fully processed by the
inner loop. But this not true.
If we hit one of the limits, such as the max segment size or the max
request size, we will break and copy a partial packet then contine
back up to the top of the outermost loop.
With the new loops we don't have this problem as we don't guard the
loop exit with a packet count, but instead use the progression of the
pkt_next SKB through the list to the end. The general structure is:
sg_cnt = 0;
skb_queue_walk(target_list, pkt_next) {
pkt_offset = 0;
...
sg_cnt++;
...
while (pkt_offset < pkt_next->len) {
pkt_offset += sg_data_size;
if (queued up max per request)
mmc_submit_one();
}
}
if (sg_cnt)
mmc_submit_one();
The variables that maintain where we are in the MMC command state such
as req_sz, sg_cnt, and sgl are reset when we emit one of these full
sized requests.
Signed-off-by: David S. Miller <davem@davemloft.net>
It turns out I missed one VLAN_TAG_PRESENT in OVS code while rebasing.
This fixes it.
Fixes: 9df46aefafa6 ("OVS: remove use of VLAN_TAG_PRESENT")
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
Here are some small tty fixes for 4.20-rc2
One of these missed the original 4.19-final release, I missed that I
hadn't done a pull request for it as it was in linux-next and my branch
for a long time, that's my fault.
The others are small, fixing some reported issues and finally fixing the
termios mess for alpha so that glibc has a chance to implement some
missing functionality that has been pending for many years now.
All of these have been in linux-next with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-4.20-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial fixes from Greg KH:
"Here are some small tty fixes for 4.20-rc2
One of these missed the original 4.19-final release, I missed that I
hadn't done a pull request for it as it was in linux-next and my
branch for a long time, that's my fault.
The others are small, fixing some reported issues and finally fixing
the termios mess for alpha so that glibc has a chance to implement
some missing functionality that has been pending for many years now.
All of these have been in linux-next with no reported issues"
* tag 'tty-4.20-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
serial: sh-sci: Fix could not remove dev_attr_rx_fifo_timeout
arch/alpha, termios: implement BOTHER, IBSHIFT and termios2
termios, tty/tty_baudrate.c: fix buffer overrun
vt: fix broken display when running aptitude
serial: sh-sci: Fix receive on SCIFA/SCIFB variants with DMA
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Merge tag 'drm-fixes-2018-11-11' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"drm: i915, amdgpu, sun4i, exynos and etnaviv fixes:
- amdgpu has some display fixes, KFD ioctl fixes and a Vega20 bios
interaction fix.
- sun4i has some NULL checks added
- i915 has a 32-bit system fix, LPE audio oops, and HDMI2.0 clock
fixes.
- Exynos has a 3 regression fixes (one frame counter, fbdev missing,
dsi->panel check)
- Etnaviv has a single fencing fix for GPU recovery"
* tag 'drm-fixes-2018-11-11' of git://anongit.freedesktop.org/drm/drm: (39 commits)
drm/amd/amdgpu/dm: Fix dm_dp_create_fake_mst_encoder()
drm/amd/display: Drop reusing drm connector for MST
drm/amd/display: Cleanup MST non-atomic code workaround
drm/amd/powerplay: always use fast UCLK switching when UCLK DPM enabled
drm/amd/powerplay: set a default fclk/gfxclk ratio
drm/amdgpu/display/dce11: only enable FBC when selected
drm/amdgpu/display/dm: handle FBC dc feature parameter
drm/amdgpu/display/dc: add FBC to dc_config
drm/amdgpu: add DC feature mask module parameter
drm/amdgpu/display: check if fbc is available in set_static_screen_control (v2)
drm/amdgpu/vega20: add CLK base offset
drm/amd/display: Stop leaking planes
drm/amd/display: Fix misleading buffer information
Revert "drm/amd/display: set backlight level limit to 1"
drm/amd: Update atom_smu_info_v3_3 structure
drm/i915: Fix ilk+ watermarks when disabling pipes
drm/sun4i: tcon: prevent tcon->panel dereference if NULL
drm/sun4i: tcon: fix check of tcon->panel null pointer
drm/i915: Don't oops during modeset shutdown after lpe audio deinit
drm/i915: Mark pin flags as u64
...
Pull namespace fixes from Eric Biederman:
"I believe all of these are simple obviously correct bug fixes. These
fall into two groups:
- Fixing the implementation of MNT_LOCKED which prevents lesser
privileged users from seeing unders mounts created by more
privileged users.
- Fixing the extended uid and group mapping in user namespaces.
As well as ensuring the code looks correct I have spot tested these
changes as well and in my testing the fixes are working"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
mount: Prevent MNT_DETACH from disconnecting locked mounts
mount: Don't allow copying MNT_UNBINDABLE|MNT_LOCKED mounts
mount: Retest MNT_LOCKED in do_umount
userns: also map extents in the reverse map to kernel IDs
imbalance, two to mark some Amlogic clks as critical, and one final
one that fixes a clk name for the Qualcomm driver merged this cycle.
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Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk fixes from Stephen Boyd:
"A small set of fixes for clk drivers.
One to fix a DT refcount imbalance, two to mark some Amlogic clks as
critical, and one final one that fixes a clk name for the Qualcomm
driver merged this cycle"
* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
clk: qcom: gcc: Fix board clock node name
clk: meson: axg: mark fdiv2 and fdiv3 as critical
clk: meson-gxbb: set fclk_div3 as CLK_IS_CRITICAL
clk: fixed-factor: fix of_node_get-put imbalance
TCA_FLOWER_KEY_ENC_OPTS and TCA_FLOWER_KEY_ENC_OPTS_MASK can only
currently contain further nested attributes, which are parsed by
hand, so the policy is never actually used resulting in a W=1
build warning:
net/sched/cls_flower.c:492:1: warning: ‘enc_opts_policy’ defined but not used [-Wunused-const-variable=]
enc_opts_policy[TCA_FLOWER_KEY_ENC_OPTS_MAX + 1] = {
Add the validation anyway to avoid potential bugs when other
attributes are added and to make the attribute structure slightly
more clear. Validation will also set extact to point to bad
attribute on error.
Fixes: 0a6e77784f49 ("net/sched: allow flower to match tunnel options")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Simon Horman <simon.horman@netronome.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
- Fix occasional page fault during boot due to memblock resizing before
the linear map is up.
- Define NET_IP_ALIGN to 0 to improve the DMA performance on some
platforms.
- lib/raid6 test build fix.
- .mailmap update for Punit Agrawal
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- Fix occasional page fault during boot due to memblock resizing before
the linear map is up.
- Define NET_IP_ALIGN to 0 to improve the DMA performance on some
platforms.
- lib/raid6 test build fix.
- .mailmap update for Punit Agrawal
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: memblock: don't permit memblock resizing until linear mapping is up
arm64: mm: define NET_IP_ALIGN to 0
lib/raid6: Fix arm64 test build
mailmap: Update email for Punit Agrawal
Pull i2c updates from Wolfram Sang:
"I2C has one bugfix (qcom-geni driver), one arch enablement (i2c-omap
driver, no code change), and a new driver (nvidia-gpu) this time"
* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
usb: typec: ucsi: add support for Cypress CCGx
i2c: nvidia-gpu: make pm_ops static
i2c: add i2c bus driver for NVIDIA GPU
i2c: qcom-geni: Fix runtime PM mismatch with child devices
MAINTAINERS: Add entry for i2c-omap driver
i2c: omap: Enable for ARCH_K3
dt-bindings: i2c: omap: Add new compatible for AM654 SoCs
The following:
skb = skb->next;
...
if (skb == (struct sk_buff *)queue)
is transformed into:
skb = skb_peek_next(skb, queue);
...
if (!skb)
Signed-off-by: David S. Miller <davem@davemloft.net>
The phy core provides a handy phy_speed_to_str() helper, so use that
instead of doing our own formatting of the different known link speeds.
To do this, increase PHY_LED_TRIGGER_SPEED_SUFFIX_SIZE to 11 so we can fit
'Unsupported' if necessary.
Signed-off-by: Kyle Roeschley <kyle.roeschley@ni.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
As a heritage from the very early days of phylib member interrupts is
defined as u32 even though it's just a flag whether interrupts are
enabled. So we can change it to a bitfield member. In addition change
the code dealing with this member in a way that it's clear we're
dealing with a bool value.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The reserved variable should be named reserved1.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ioana Ciornei says:
====================
dpaa2-eth: defer probe on object allocate
Allocatable objects on the fsl-mc bus may be probed by the fsl_mc_allocator
after the first attempts of other drivers to use them. Defer the probe when
this situation happens.
Changes in v2:
- proper handling of IS_ERR_OR_NULL
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The fsl_mc_portal_allocate can fail when the requested MC portals are
not yet probed by the fsl_mc_allocator. In this situation, the driver
should defer the probe.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The fsl_mc_object_allocate function can fail because not all allocatable
objects are probed by the fsl_mc_allocator at the call time. Defer the
dpaa2-eth probe when this happens.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
In the udp6 code path, we needed multiple tests to select the correct
mib to be updated. Since we touch at least a counter at each iteration,
it's convenient to use the recently introduced __UDPX_MIB() helper once
and remove some code duplication.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Only first fragment has the sport/dport information,
not the following ones.
If we want consistent hash for all fragments, we need to
ignore ports even for first fragment.
This bug is visible for IPv6 traffic, if incoming fragments
do not have a flow label, since skb_get_hash() will give
different results for first fragment and following ones.
It is also visible if any routing rule wants dissection
and sport or dport.
See commit 5e5d6fed3741 ("ipv6: route: dissect flow
in input path if fib rules need it") for details.
[edumazet] rewrote the changelog completely.
Fixes: 06635a35d13d ("flow_dissect: use programable dissector in skb_flow_dissect and friends")
Signed-off-by: 배석진 <soukjin.bae@samsung.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
__netdev_tx_sent_queue() was added in commit e59020abf0f
("net: bql: add __netdev_tx_sent_queue()") and allows for
better GSO performance.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
A null dereference was observed when a sysctl was being set
from userspace and rmnet was stuck trying to complete some actions
in the NETDEV_REGISTER callback. This is because the real_dev is set
only after the device registration handler completes.
sysctl call stack -
<6> Unable to handle kernel NULL pointer dereference at
virtual address 00000108
<2> pc : rmnet_vnd_get_iflink+0x1c/0x28
<2> lr : dev_get_iflink+0x2c/0x40
<2> rmnet_vnd_get_iflink+0x1c/0x28
<2> inet6_fill_ifinfo+0x15c/0x234
<2> inet6_ifinfo_notify+0x68/0xd4
<2> ndisc_ifinfo_sysctl_change+0x1b8/0x234
<2> proc_sys_call_handler+0xac/0x100
<2> proc_sys_write+0x3c/0x4c
<2> __vfs_write+0x54/0x14c
<2> vfs_write+0xcc/0x188
<2> SyS_write+0x60/0xc0
<2> el0_svc_naked+0x34/0x38
device register call stack -
<2> notifier_call_chain+0x84/0xbc
<2> raw_notifier_call_chain+0x38/0x48
<2> call_netdevice_notifiers_info+0x40/0x70
<2> call_netdevice_notifiers+0x38/0x60
<2> register_netdevice+0x29c/0x3d8
<2> rmnet_vnd_newlink+0x68/0xe8
<2> rmnet_newlink+0xa0/0x160
<2> rtnl_newlink+0x57c/0x6c8
<2> rtnetlink_rcv_msg+0x1dc/0x328
<2> netlink_rcv_skb+0xac/0x118
<2> rtnetlink_rcv+0x24/0x30
<2> netlink_unicast+0x158/0x1f0
<2> netlink_sendmsg+0x32c/0x338
<2> sock_sendmsg+0x44/0x60
<2> SyS_sendto+0x150/0x1ac
<2> el0_svc_naked+0x34/0x38
Fixes: b752eff5be24 ("net: qualcomm: rmnet: Implement ndo_get_iflink")
Signed-off-by: Sean Tranchetti <stranche@codeaurora.org>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Miroslav Lichvar says:
====================
More accurate PHC<->system clock synchronization
RFC->v1:
- added new patches
- separated PHC timestamp from ptp_system_timestamp
- fixed memory leak in PTP_SYS_OFFSET_EXTENDED
- changed PTP_SYS_OFFSET_EXTENDED to work with array of arrays
- fixed PTP_SYS_OFFSET_EXTENDED to break correctly from loop
- fixed timecounter updates in drivers
- split gettimex in igb driver
- fixed ptp_read_* functions to be available without
CONFIG_PTP_1588_CLOCK
This series enables a more accurate synchronization between PTP hardware
clocks and the system clock.
The first two patches are minor cleanup/bug fixes.
The third patch adds an extended version of the PTP_SYS_OFFSET ioctl,
which returns three timestamps for each measurement. The idea is to
shorten the interval between the system timestamps to contain just the
reading of the lowest register of the PHC in order to reduce the error
in the measured offset and get a smaller upper bound on the maximum
error.
The fourth patch deprecates the original gettime function.
The remaining patches update the gettime function in order to support
the new ioctl in the e1000e, igb, ixgbe, and tg3 drivers.
Tests with few different NICs in different machines show that:
- with an I219 (e1000e) the measured delay was reduced from 2500 to 1300
ns and the error in the measured offset, when compared to the cross
timestamping supported by the driver, was reduced by a factor of 5
- with an I210 (igb) the delay was reduced from 5100 to 1700 ns
- with an I350 (igb) the delay was reduced from 2300 to 750 ns
- with an X550 (ixgbe) the delay was reduced from 1950 to 650 ns
- with a BCM5720 (tg3) the delay was reduced from 2400 to 1200 ns
====================
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This adds support for the PTP_SYS_OFFSET_EXTENDED ioctl.
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This adds support for the PTP_SYS_OFFSET_EXTENDED ioctl.
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Jacob Keller <jacob.e.keller@intel.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This adds support for the PTP_SYS_OFFSET_EXTENDED ioctl.
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Jacob Keller <jacob.e.keller@intel.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This adds support for the PTP_SYS_OFFSET_EXTENDED ioctl.
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Jacob Keller <jacob.e.keller@intel.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When a driver provides gettimex64(), use it in the PTP_SYS_OFFSET ioctl
and POSIX clock's gettime() instead of gettime64(). Drivers should
provide only one of the functions.
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The PTP_SYS_OFFSET ioctl, which can be used to measure the offset
between a PHC and the system clock, includes the total time that the
driver needs to read the PHC timestamp.
This typically involves reading of multiple PCI registers (sometimes in
multiple iterations) and the register that contains the lowest bits of
the timestamp is not read in the middle between the two readings of the
system clock. This asymmetry causes the measured offset to have a
significant error.
Introduce a new ioctl, driver function, and helper functions, which
allow the reading of the lowest register to be isolated from the other
readings in order to reduce the asymmetry. The ioctl returns three
timestamps for each measurement:
- system time right before reading the lowest bits of the PHC timestamp
- PHC time
- system time immediately after reading the lowest bits of the PHC
timestamp
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Jacob Keller <jacob.e.keller@intel.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
If a gettime64 call fails, return the error and avoid copying data back
to user.
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Reorder declarations of variables as reversed Christmas tree.
Cc: Richard Cochran <richardcochran@gmail.com>
Suggested-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
