Commit Graph

286 Commits

Author SHA1 Message Date
Emmanuel Vadot
0f6efb4445 ofw: ofw_reg_to_paddr: Use a 256 static array for the cell
Some hardware needs more than 32, bump this value.

We cannot use the _alloc for of getencprop as this function is called
too early in the boot before pmap is initialized and we only have
2k of stack when cninit is called.

Discussed with:     ian
2019-08-07 13:13:16 +00:00
Justin Hibbits
937a05ba81 Add necessary bits for Linux KPI to work correctly on powerpc
PowerPC, and possibly other architectures, use different address ranges for
PCI space vs physical address space, which is only mapped at resource
activation time, when the BAR gets written.  The DRM kernel modules do not
activate the rman resources, soas not to waste KVA, instead only mapping
parts of the PCI memory at a time.  This introduces a
BUS_TRANSLATE_RESOURCE() method, implemented in the Open Firmware/FDT PCI
driver, to perform this necessary translation without activating the
resource.

In addition to system KPI changes, LinuxKPI is updated to handle a
big-endian host, by adding proper endian swaps to the I/O functions.

Submitted by:	mmacy
Reported by:	hselasky
Differential Revision:	https://reviews.freebsd.org/D21096
2019-08-04 19:28:10 +00:00
Ian Lepore
b609a55345 Define macros making it easier to define bus-specific pnpinfo for FDT systems.
Pnpinfo is bus-specific and requires the bus name. The FDTCOMPAT_PNP_INFO()
macro makes it easier to define new FDT-based pnpinfo for busses other than
simplebus.

Differential Revision:	https://reviews.freebsd.org/D20382
2019-05-23 15:47:30 +00:00
Emmanuel Vadot
9a4eed0be2 ofw_graph: Add functions for graph bindings
Those functions are helpers to work on graph bindings.
graphs are mostly use with video related devices.
See https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/graph.txt?id=4436a3711e3249840e0679e92d3c951bcaf25515

MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D19877
2019-04-17 20:09:01 +00:00
Warner Losh
329e817fcc Reapply, with minor tweaks, r338025, from the original commit:
Remove unused and easy to misuse PNP macro parameter

Inspired by r338025, just remove the element size parameter to the
MODULE_PNP_INFO macro entirely.  The 'table' parameter is now required to
have correct pointer (or array) type.  Since all invocations of the macro
already had this property and the emitted PNP data continues to include the
element size, there is no functional change.

Mostly done with the coccinelle 'spatch' tool:

  $ cat modpnpsize0.cocci
    @normaltables@
    identifier b,c;
    expression a,d,e;
    declarer MODULE_PNP_INFO;
    @@
     MODULE_PNP_INFO(a,b,c,d,
    -sizeof(d[0]),
     e);

    @singletons@
    identifier b,c,d;
    expression a;
    declarer MODULE_PNP_INFO;
    @@
     MODULE_PNP_INFO(a,b,c,&d,
    -sizeof(d),
     1);

  $ rg -l MODULE_PNP_INFO -- sys | \
    xargs spatch --in-place --sp-file modpnpsize0.cocci

(Note that coccinelle invokes diff(1) via a PATH search and expects diff to
tolerate the -B flag, which BSD diff does not.  So I had to link gdiff into
PATH as diff to use spatch.)

Tinderbox'd (-DMAKE_JUST_KERNELS).
Approved by: re (glen)
2018-09-26 17:12:14 +00:00
Conrad Meyer
b8e771e97a Back out r338035 until Warner is finished churning GSoC PNP patches
I was not aware Warner was making or planning to make forward progress in
this area and have since been informed of that.

It's easy to apply/reapply when churn dies down.
2018-08-19 00:46:22 +00:00
Conrad Meyer
faa319436f Remove unused and easy to misuse PNP macro parameter
Inspired by r338025, just remove the element size parameter to the
MODULE_PNP_INFO macro entirely.  The 'table' parameter is now required to
have correct pointer (or array) type.  Since all invocations of the macro
already had this property and the emitted PNP data continues to include the
element size, there is no functional change.

Mostly done with the coccinelle 'spatch' tool:

  $ cat modpnpsize0.cocci
    @normaltables@
    identifier b,c;
    expression a,d,e;
    declarer MODULE_PNP_INFO;
    @@
     MODULE_PNP_INFO(a,b,c,d,
    -sizeof(d[0]),
     e);

    @singletons@
    identifier b,c,d;
    expression a;
    declarer MODULE_PNP_INFO;
    @@
     MODULE_PNP_INFO(a,b,c,&d,
    -sizeof(d),
     1);

  $ rg -l MODULE_PNP_INFO -- sys | \
    xargs spatch --in-place --sp-file modpnpsize0.cocci

(Note that coccinelle invokes diff(1) via a PATH search and expects diff to
tolerate the -B flag, which BSD diff does not.  So I had to link gdiff into
PATH as diff to use spatch.)

Tinderbox'd (-DMAKE_JUST_KERNELS).
2018-08-19 00:22:21 +00:00
Emmanuel Vadot
bc9ba24ffc ofw_cpu: Add support for getting cpu clock via clock property
Nominal Mhz is either expressed via the clock-frequency property
or can be get via the clock property that holds the cpu clock.
Add support for the later.

Reviewed by:	nwhitehorn
Differential Revision:	https://reviews.freebsd.org/D16346
2018-07-31 20:50:50 +00:00
Warner Losh
fd4d775773 Add missing include of sys/boot.h 2018-07-13 18:00:13 +00:00
Warner Losh
eed42ff1d5 Use boot_parse_* to parse command line args and retire cut-n-paste
code that was substantially identical.

Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D16205
2018-07-13 16:43:17 +00:00
Justin Hibbits
d23d5d73e8 Attach dev.cpu nodes on powerpc SMT cores, using only the first found thread
Summary: In order to use cpufreq(4), a dev.cpu attachment must be created.  If
the IBM property is found denoting SMT, attach only to the first thread setup,
so that a cpufreq device can bind.

Reviewed by:	nwhitehorn
Differential Revision: https://reviews.freebsd.org/D15921
2018-06-20 13:30:35 +00:00
Justin Hibbits
6f3fcd7693 Check for a 'pci' prefix rather than a full match in get_addr_props
Summary:
Newer OPAL device trees, such as those on POWER9 systems, use 'pciex' for
device_type, not 'pci'.  Rather than enumerating all possible variants, just
check for a 'pci' prefix.

Reviewed by:	nwhitehorn, breno.leitao_gmail.com
Differential Revision: https://reviews.freebsd.org/D15817
2018-06-15 18:55:02 +00:00
Justin Hibbits
ec0646391d ofw_reg_to_paddr(): Fix minor typo in KASSERT message 2018-06-15 03:28:05 +00:00
Emmanuel Vadot
25f0326aea simplebus pnp: Do not generate pnp info is the bus status is not okay
Generating the pnp info have the side effect to include all nodes even
if the status isn't "okay".
That means that loading the module will load but not attach as it checks
the status in the probe function.

On pine64 before :
root@pine64-lts:~ # devmatch -u
unattached on ofwbus pnpinfo name=memory
unattached on ofwbus pnpinfo name=chosen
unattached on ofwbus pnpinfo name=sound_spdif compat=simple-audio-card
unattached on ofwbus pnpinfo name=spdif-out compat=linux,spdif-dit
unattached on simplebus pnpinfo name=dma-controller@1c02000 compat=allwinner,sun50i-a64-dma
unattached on simplebus pnpinfo name=mmc@1c10000 compat=allwinner,sun50i-a64-mmc
unattached on simplebus pnpinfo name=usb@1c19000 compat=allwinner,sun8i-a33-musb
unattached on simplebus pnpinfo name=spdif@1c21000 compat=allwinner,sun50i-a64-spdif
unattached on simplebus pnpinfo name=i2s@1c22000 compat=allwinner,sun50i-a64-i2s
unattached on simplebus pnpinfo name=i2s@1c22400 compat=allwinner,sun50i-a64-i2s
unattached on simplebus pnpinfo name=serial@1c28400 compat=snps,dw-apb-uart
unattached on simplebus pnpinfo name=serial@1c28800 compat=snps,dw-apb-uart
unattached on simplebus pnpinfo name=serial@1c28c00 compat=snps,dw-apb-uart
unattached on simplebus pnpinfo name=serial@1c29000 compat=snps,dw-apb-uart
unattached on simplebus pnpinfo name=i2c@1c2ac00 compat=allwinner,sun6i-a31-i2c
unattached on simplebus pnpinfo name=i2c@1c2b000 compat=allwinner,sun6i-a31-i2c
unattached on simplebus pnpinfo name=i2c@1c2b400 compat=allwinner,sun6i-a31-i2c
unattached on ofwbus pnpinfo name=aliases
unattached on ofwbus pnpinfo name=symbols

All simplebus node are disabled

After :
root@pine64-lts:~ # devmatch -u
unattached on ofwbus pnpinfo name=memory
unattached on ofwbus pnpinfo name=chosen
unattached on ofwbus pnpinfo name=sound_spdif compat=simple-audio-card
unattached on ofwbus pnpinfo name=spdif-out compat=linux,spdif-dit
unattached on simplebus pnpinfo name=dma-controller@1c02000 compat=allwinner,sun50i-a64-dma
unattached on simplebus pnpinfo name=usb@1c19000 compat=allwinner,sun8i-a33-musb
unattached on ofwbus pnpinfo name=aliases
unattached on ofwbus pnpinfo name=symbols

Reviewed by:	imp (with some objection)
Differential Revision:	https://reviews.freebsd.org/D15770
2018-06-12 20:03:00 +00:00
Breno Leitao
4a4b4c98f5 dev/ofw: Fix ofw_fdt_getprop() return values to match documentation
Fix the behavior of ofw_fdt_getprop() and ofw_fdt_getprop() functions to match
the documentation as the non-fdt code.

Submitted by: Luis Pires <lffpires@ruabrasil.org>
Reviewed by: manu, jhibbits
Approved by: jhibbits (mentor)
Differential Revision: https://reviews.freebsd.org/D15680
2018-06-07 15:59:08 +00:00
Ed Maste
891cf3ed44 Use NULL for SYSINIT's last arg, which is a pointer type
Sponsored by:	The FreeBSD Foundation
2018-05-18 17:58:09 +00:00
Oleksandr Tymoshenko
f7604b1b27 Align OF_getencprop_alloc API with OF_getencprop and OF_getprop_alloc
Change OF_getencprop_alloc semantics to be combination of malloc and
OF_getencprop and return size of the property, not number of elements
allocated.

For the use cases where number of elements is preferred introduce
OF_getencprop_alloc_multi helper function that copies semantics
of OF_getencprop_alloc prior to this change.

This is to make OF_getencprop_alloc and OF_getencprop_alloc_multi
function signatures consistent with OF_getencprop_alloc and
OF_getencprop_alloc_multi.

Functionality-wise this patch is mostly rename of OF_getencprop_alloc
to OF_getencprop_alloc_multi except two calls in ofw_bus_setup_iinfo
where 1 was used as a block size.
2018-04-09 22:06:16 +00:00
Oleksandr Tymoshenko
c581f24a3b Make OF_searchencprop signature consistent with OF_getencprop
Use pcell_t* as a destination buffer argument instead of void
pointer to be consistent with OF_getencprop signature.
2018-04-09 00:38:24 +00:00
Oleksandr Tymoshenko
217d17bcd3 Clean up OF_getprop_alloc API
OF_getprop_alloc takes element size argument and returns number of
elements in the property. There are valid use cases for such behavior
but mostly API consumers pass 1 as element size to get string
properties. What API users would expect from OF_getprop_alloc is to be
a combination of malloc + OF_getprop with the same semantic of return
value. This patch modifies API signature to match these expectations.

For the valid use cases with element size != 1 and to reduce
modification scope new OF_getprop_alloc_multi function has been
introduced that behaves the same way OF_getprop_alloc behaved prior to
this patch.

Reviewed by:	ian, manu
Differential Revision:	https://reviews.freebsd.org/D14850
2018-04-08 22:59:34 +00:00
Marcin Wojtas
d310c9e018 Add api for creating resource list based on 'assigned-addresses'
According to device tree binding 'assigned-addresses' can refer to PCIE MMIO
register space. New function ofw_bus_assigned_addresses_to_rl is
provided to support it.

Submitted by: Rafal Kozik <rk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Stormshield
Differential Revision: https://reviews.freebsd.org/D14750
2018-04-04 12:47:41 +00:00
Oleksandr Tymoshenko
108117cc22 [ofw] fix errneous checks for OF_finddevice(9) return value
OF_finddevices returns ((phandle_t)-1) in case of failure. Some code
in existing drivers checked return value to be equal to 0 or
less/equal to 0 which is also wrong because phandle_t is unsigned
type. Most of these checks were for negative cases that were never
triggered so trhere was no impact on functionality.

Reviewed by:	nwhitehorn
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D14645
2018-03-20 00:03:49 +00:00
Kyle Evans
cd78f5ff20 ofw_fdt: Simplify parts with new libfdt methods
libfdt now provides methods to iterate through subnodes and properties in a
convenient fashion.

Replace our ofw_fdt_{peer,child} searches with calls to their corresponding
libfdt methods. Rework ofw_fdt_nextprop to use the
fdt_for_each_property_offset macro, making it even more obvious what it's
doing.

No functional change intended.

Reviewed by:	nwhitehorn
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D14225
2018-02-26 14:00:23 +00:00
Nathan Whitehorn
65184f89b6 Set internal error returns for OF_peer(), OF_child(), and OF_parent() to
zero, matching the IEEE 1275 standard. Since these internal error paths
have never, to my knowledge, been taken, behavior is unchanged.

Reported by:	gonzo
MFC after:	2 weeks
2018-02-19 15:49:14 +00:00
Warner Losh
8cc3cfa86d Out of an abundance of caution, NUL out the first byte in the PNP
info.
2018-01-28 23:58:22 +00:00
Justin Hibbits
ed03d62a4c Remove fdt fixups for powerpc, they are no longer needed.
If a fixup really is needed, it should be fixed in u-boot, not in FreeBSD.

Suggested by:	nwhitehorn
2018-01-13 02:56:09 +00:00
Nathan Whitehorn
01d1c9d889 Avoid use of the fdt_get_property_*() API, which is intrinsically
incompatible with FDT versions < 16. This also simplifies the code a bit.

MFC after:	1 month
2017-12-30 20:28:29 +00:00
Alexander Kabaev
151ba7933a Do pass removing some write-only variables from the kernel.
This reduces noise when kernel is compiled by newer GCC versions,
such as one used by external toolchain ports.

Reviewed by: kib, andrew(sys/arm and sys/arm64), emaste(partial), erj(partial)
Reviewed by: jhb (sys/dev/pci/* sys/kern/vfs_aio.c and sys/kern/kern_synch.c)
Differential Revision: https://reviews.freebsd.org/D10385
2017-12-25 04:48:39 +00:00
Nathan Whitehorn
2bfca5775b Back out OF module installation in the event of failure. PS3 firmware gives
some ancient FDT version (2) that fails the init check in OFW_FDT. It is
still possible to make progress, but not while the OF layer is going crazy.
2017-11-28 06:31:39 +00:00
Pedro F. Giffuni
718cf2ccb9 sys/dev: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-27 14:52:40 +00:00
Nathan Whitehorn
763864aa95 Do not bind to CPUs with SMT, which use a different CPU numbering convention
that does not play well with this driver.

MFC after:	2 weeks
2017-11-25 21:46:51 +00:00
Pedro F. Giffuni
7282444b10 sys/dev: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:36:21 +00:00
Warner Losh
6043585892 'private' isn't a PNP string field, so instead used the reserved '#'
name for this field (it might even be possible to just drop it
entirely, since it will be ignored either way).

Sponsored by: Netflix
2017-10-04 14:41:45 +00:00
Marcin Wojtas
e2b9d20234 Enable OF_setprop API function to add property in FDT
This patch modifies function ofw_fdt_setprop (called by OF_setprop),
so that it can add property, when replacing is not possible.
Adding property is needed to fixup FDT's that have missing
properties.

Submitted by: Patryk Duda <pdk@semihalf.com>
Reviewed by: nwhitehorn, cognet (mentor)
Approved by: cognet (mentor)
Obtained from: Semihalf
Differential Revision: https://reviews.freebsd.org/D11879
2017-08-10 13:45:56 +00:00
Marcin Wojtas
edf3dd3b0a Enable using ofw_bus_find_compatible in early platform code
Before this patch function ofw_bus_find_compatible was using
memory allocations in order to find compatible node and the property's
length. This way there was always a suited buffer for property,
however this approach had also disadvantages - ofw_bus_find_compatible
couldn't be used when malloc is not available, e.g. during fdt fixup stage.

In order to remove the usage limitation of ofw_bus_find_compatible(),
this patch modifies the function to use ofw_bus_node_is_compatible()
(instead of the one without _int suffix), which uses a fixed
buffer on stack instead of dynamic allocations.

Submitted by: Patryk Duda <pdk@semihalf.com>
Reviewed by: nwhitehorn, cognet (mentor)
Approved by: cognet (mentor)
Obtained from: Semihalf
Differential Revision: https://reviews.freebsd.org/D11880
2017-08-09 01:06:40 +00:00
Marcin Wojtas
a355bb8846 Add support for "compatible" parameter in ofw_fdt_fixup
Sometimes it's convenient to provide fixup to many boards
that use the same SoC family (eg. Marvell Armada 38x).
Instead of putting multiple entries in fdt_fixup_table,
use one entry which refers to all boards with given SoC.

Submitted by: Patryk Duda <pdk@semihalf.com>
Reviewed by: nwhitehorn, cognet (mentor)
Approved by: cognet (mentor)
Obtained from: Semihalf
Differential Revision: https://reviews.freebsd.org/D11878
2017-08-09 00:56:29 +00:00
Olivier Houchard
5d840968f8 Update comment ot reflect realilty, we know also take care of CPUs that
provide a enable-method.

Suggested by:	jhibbits
2017-04-20 15:06:16 +00:00
Olivier Houchard
21ce594e7a ePAPR states that any non-boot CPU will come in "disabled" state. So we should
not consider a "disabled" cpu as a CPU we have to ignore, and we should use
them if they provide a "enable-method".
While I'm there, support "ok" as well as "okay", while ePAPR only accepts
"okay", linux accepts "ok" too so we can expect it to be used.

Reviewed by:	andrew (partially)
2017-04-20 13:56:06 +00:00
Warner Losh
fbbd9655e5 Renumber copyright clause 4
Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by:	Jan Schaumann <jschauma@stevens.edu>
Pull Request:	https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00
Warner Losh
28586889c2 Convert PCIe Hot Plug to using pci_request_feature
Convert PCIe hot plug support over to asking the firmware, if any, for
permission to use the HotPlug hardware. Implement pci_request_feature
for ACPI. All other host pci connections to allowing all valid feature
requests.

Sponsored by: Netflix
2017-02-25 06:11:59 +00:00
Pedro F. Giffuni
4d24901ac9 sys/dev: Replace zero with NULL for pointers.
Makes things easier to read, plus architectures may set NULL to something
different than zero.

Found with:	devel/coccinelle
MFC after:	3 weeks
2017-02-20 03:43:12 +00:00
Wojciech Macek
e5e94d2de9 Expand OpenFirmware API with ofw_bus_node_status_okay
method

Method could be used before we can access device_t structure.
As per simple phandle_t handle we can access FDT to check
if specified node has been enabled.
It will be used in Marvell's common configuration code.

Submitted by:          Konrad Adamczyk <ka@semihalf.com>
Obtained from:         Semihalf
Sponsored by:          Stormshield
Reviewed by:           zbb, meloun-miracle-cz
Differential revision: https://reviews.freebsd.org/D9218
2017-01-25 10:28:21 +00:00
Andrew Turner
0a4c0732a9 Restrict where we need to define fdt_fixup_table to just PowerPC and
Marvell.

Sponsored by:	ABT Systems Ltd
2016-09-23 14:11:23 +00:00
Justin Hibbits
9ed9b26792 Add a ofw_parse_bootargs function, and use it for powerpc
Summary:
If the environment variable is set, U-boot adds a 'bootargs' property to
/chosen.  This is already handled by ARM and MIPS, but should be handled in a
central location.  For now, ofw_subr.c is a good place until we determine if it
should be moved to init_main.c, or somewhere more central to all architectures.

Eventually arm and mips should be modified to use ofw_parse_bootargs() as well,
rather than using the duplicate code already.

Reviewed By: adrian
Differential Revision: https://reviews.freebsd.org/D7846
2016-09-21 02:28:39 +00:00
Justin Hibbits
24f4202df8 Check all compatible strings on uart devices in powerpc
Summary:
Some device trees put "fsl,ns16650" first in the compatible list.  This causes
the probe code to choke, even though the device is compatible with ns16650, and
has it listed later in the tree.

Reviewed by:	nwhitehorn
MFC after:	1 week
Differential Revision: https://reviews.freebsd.org/D7676
2016-08-28 21:31:21 +00:00
Michal Meloun
895c8b1c39 INTRNG: Rework handling with resources. Partially revert r301453.
- Read interrupt properties at bus enumeration time and store
   it into global mapping table.
 - At bus_activate_resource() time, given mapping entry is resolved and
   connected to real interrupt source. A copy of mapping entry is attached
   to given resource.
 - At bus_setup_intr() time, mapping entry stored in resource is used
   for delivery of requested interrupt configuration.
 - For MSI/MSIX interrupts, mapping entry is created within
   pci_alloc_msi()/pci_alloc_msix() call.
 - For legacy PCI interrupts, mapping entry must be created within
   pcib_route_interrupt() by pcib driver itself.

Reviewed by: nwhitehorn, andrew
Differential Revision: https://reviews.freebsd.org/D7493
2016-08-19 10:52:39 +00:00
Michal Meloun
aa71e06db5 OFWPCI: Don't strip RF_ACTIVE from flags when parent bus method is called.
Reviewed by:	nwhitehorn
MFC after:	3 weeks
2016-08-14 05:10:26 +00:00
Edward Tomasz Napierala
108c227330 Remove NULL checks after M_WAITOK allocations from sys/dev/ofw/.
MFC after:	1 month
2016-08-09 15:55:14 +00:00
Stephen J. Kiernan
a183d81dc9 Add hw.fdt sysctl node.
Make FDT blob available via opaque hw.fdt.dtb sysctl, if a DTB has been
installed by the time sysctls are registered.

Reviewed by:	andrew
Approved by:	sjg (mentor)
Sponsored by:	Juniper Networks, Inc.
Differential Revision:	https://reviews.freebsd.org/D7411
2016-08-06 18:48:47 +00:00
Michal Meloun
efafbd0a87 OFWPCI: Add support for NEW_PCIB.
MFC after: 3 weeks
2016-07-17 13:43:46 +00:00
Michal Meloun
5572376db2 OFWPCI: Improve resource handling.
- add new rman for prefetchable memory. Is used only if given 'ranges'
  property contains prefetchable memory range.

- not all ranges in 'ranges' property are subject for rman's filling.
  Tegra for example, have two addition records which are used for
  'pci 'register' -> 'assigned-address' -> 'ranges' machinery.
  Add sc_ranges_mask for masking not rman related ranges.

- consistently pass unknown (not managed at this level) resources
  allocation/release/adjust requests to parent.

MFC after: 3 weeks
2016-07-17 13:43:00 +00:00