[PATCH RFC 0/2] ARM: shmobile: lager: Enable DMA bounce for PCI

[PATCH RFC 0/2] ARM: shmobile: lager: Enable DMA bounce for PCI

[Valentine Barshak]

This enables DMA bounce for PCI since the controller does
not support more than 2G PCI-AHB memory window.
The problems with DMA transfers can be observed when
setting 2G/2G user/kernel memory split model
(CONFIG_VMSPLIT_2G=y)
These patches help to avoid it.

The patches should be applied on top of the 
"[PATCH V3 0/3] ARM: shmobile: lager: Add USB support" series at
http://marc.info/?l=linux-sh&m\x139060253506760&w=2

Valentine Barshak (2):
  ARM: shmobile: lager: Use DMA bounce for PCI devices
  ARM: shmobile: lager: Increase the size of ARM corehent DMA pool

 arch/arm/boot/dts/r8a7790-lager.dts  |  2 +-
 arch/arm/mach-shmobile/Kconfig       |  2 ++
 arch/arm/mach-shmobile/board-lager.c | 38 ++++++++++++++++++++++++++++++++++++
 3 files changed, 41 insertions(+), 1 deletion(-)

-- 
1.8.3.1

Re: [PATCH RFC 0/2] ARM: shmobile: lager: Enable DMA bounce for PCI

[Simon Horman]

On Tue, Jan 28, 2014 at 10:53:31PM +0400, Valentine Barshak wrote:
> This enables DMA bounce for PCI since the controller does
> not support more than 2G PCI-AHB memory window.
> The problems with DMA transfers can be observed when
> setting 2G/2G user/kernel memory split model
> (CONFIG_VMSPLIT_2G=y)
> These patches help to avoid it.

Are these patches compatible with other user/kernel splits?

> 
> The patches should be applied on top of the 
> "[PATCH V3 0/3] ARM: shmobile: lager: Add USB support" series at
> http://marc.info/?l=linux-sh&m\x139060253506760&w=2
> 
> Valentine Barshak (2):
>   ARM: shmobile: lager: Use DMA bounce for PCI devices
>   ARM: shmobile: lager: Increase the size of ARM corehent DMA pool
> 
>  arch/arm/boot/dts/r8a7790-lager.dts  |  2 +-
>  arch/arm/mach-shmobile/Kconfig       |  2 ++
>  arch/arm/mach-shmobile/board-lager.c | 38 ++++++++++++++++++++++++++++++++++++
>  3 files changed, 41 insertions(+), 1 deletion(-)
> 
> -- 
> 1.8.3.1
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-sh" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

Re: [PATCH RFC 0/2] ARM: shmobile: lager: Enable DMA bounce for PCI

[Ben Dooks]

On 29/01/14 06:45, Simon Horman wrote:
> On Tue, Jan 28, 2014 at 10:53:31PM +0400, Valentine Barshak wrote:
>> This enables DMA bounce for PCI since the controller does
>> not support more than 2G PCI-AHB memory window.
>> The problems with DMA transfers can be observed when
>> setting 2G/2G user/kernel memory split model
>> (CONFIG_VMSPLIT_2G=y)
>> These patches help to avoid it.
>
> Are these patches compatible with other user/kernel splits?

PS, the bridge is only actually capable of seeing 1GiB of
RAM due to alignment issues in the window. You can have either
0x4..0x8 or 0x8..0xc but not /both/. If you open the window to
2GiB then you can see either 0x0..0x8 or 0x8..0xF range.


-- 
Ben Dooks				http://www.codethink.co.uk/
Senior Engineer				Codethink - Providing Genius

Re: [PATCH RFC 0/2] ARM: shmobile: lager: Enable DMA bounce for PCI

[Valentine]

On 01/29/2014 10:45 AM, Simon Horman wrote:
> On Tue, Jan 28, 2014 at 10:53:31PM +0400, Valentine Barshak wrote:
>> This enables DMA bounce for PCI since the controller does
>> not support more than 2G PCI-AHB memory window.
>> The problems with DMA transfers can be observed when
>> setting 2G/2G user/kernel memory split model
>> (CONFIG_VMSPLIT_2G=y)
>> These patches help to avoid it.
>
> Are these patches compatible with other user/kernel splits?
>

Yes, they are.

>>
>> The patches should be applied on top of the
>> "[PATCH V3 0/3] ARM: shmobile: lager: Add USB support" series at
>> http://marc.info/?l=linux-sh&m\x139060253506760&w=2
>>
>> Valentine Barshak (2):
>>    ARM: shmobile: lager: Use DMA bounce for PCI devices
>>    ARM: shmobile: lager: Increase the size of ARM corehent DMA pool
>>
>>   arch/arm/boot/dts/r8a7790-lager.dts  |  2 +-
>>   arch/arm/mach-shmobile/Kconfig       |  2 ++
>>   arch/arm/mach-shmobile/board-lager.c | 38 ++++++++++++++++++++++++++++++++++++
>>   3 files changed, 41 insertions(+), 1 deletion(-)
>>
>> --
>> 1.8.3.1
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-sh" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>

Re: [PATCH RFC 0/2] ARM: shmobile: lager: Enable DMA bounce for PCI

[Valentine]

On 01/29/2014 12:03 PM, Ben Dooks wrote:
> On 29/01/14 06:45, Simon Horman wrote:
>> On Tue, Jan 28, 2014 at 10:53:31PM +0400, Valentine Barshak wrote:
>>> This enables DMA bounce for PCI since the controller does
>>> not support more than 2G PCI-AHB memory window.
>>> The problems with DMA transfers can be observed when
>>> setting 2G/2G user/kernel memory split model
>>> (CONFIG_VMSPLIT_2G=y)
>>> These patches help to avoid it.
>>
>> Are these patches compatible with other user/kernel splits?
>
> PS, the bridge is only actually capable of seeing 1GiB of
> RAM due to alignment issues in the window. You can have either
> 0x4..0x8 or 0x8..0xc but not /both/. If you open the window to
> 2GiB then you can see either 0x0..0x8 or 0x8..0xF range.
>

I don't think this is relater to the user/kernel space memory split.

Currently the R-Car Gen2 PCI driver uses 0x40000000 - 0x7fffffff
PCI-AHB region. We can set it to 0x00000000 - 0x7fffffff,
but there's no RAM below 0x40000000 so no DMA access to that area is
actually legal from the PCI USB host driver.
So the change wouldn't give us much.

The 31-bit DMA mask takes care of forbidding any DMA transfers
to the area above 0x7fffffff.

Thanks,
Val.

Re: [PATCH RFC 0/2] ARM: shmobile: lager: Enable DMA bounce for PCI

[Ben Dooks]

On 29/01/14 11:15, Valentine wrote:
> On 01/29/2014 12:03 PM, Ben Dooks wrote:
>> On 29/01/14 06:45, Simon Horman wrote:
>>> On Tue, Jan 28, 2014 at 10:53:31PM +0400, Valentine Barshak wrote:
>>>> This enables DMA bounce for PCI since the controller does
>>>> not support more than 2G PCI-AHB memory window.
>>>> The problems with DMA transfers can be observed when
>>>> setting 2G/2G user/kernel memory split model
>>>> (CONFIG_VMSPLIT_2G=y)
>>>> These patches help to avoid it.
>>>
>>> Are these patches compatible with other user/kernel splits?
>>
>> PS, the bridge is only actually capable of seeing 1GiB of
>> RAM due to alignment issues in the window. You can have either
>> 0x4..0x8 or 0x8..0xc but not /both/. If you open the window to
>> 2GiB then you can see either 0x0..0x8 or 0x8..0xF range.
>>
>
> I don't think this is relater to the user/kernel space memory split.
>
> Currently the R-Car Gen2 PCI driver uses 0x40000000 - 0x7fffffff
> PCI-AHB region. We can set it to 0x00000000 - 0x7fffffff,
> but there's no RAM below 0x40000000 so no DMA access to that area is
> actually legal from the PCI USB host driver.
> So the change wouldn't give us much.

Well, there's IO areas but probably not wanting to DMA to them anyway.

> The 31-bit DMA mask takes care of forbidding any DMA transfers
> to the area above 0x7fffffff.

I will add this to our current patch series and see if it helps.

-- 
Ben Dooks				http://www.codethink.co.uk/
Senior Engineer				Codethink - Providing Genius

Re: [PATCH RFC 0/2] ARM: shmobile: lager: Enable DMA bounce for PCI

[Valentine]

On 01/29/2014 04:45 PM, Ben Dooks wrote:
> On 29/01/14 11:15, Valentine wrote:
>> On 01/29/2014 12:03 PM, Ben Dooks wrote:
>>> On 29/01/14 06:45, Simon Horman wrote:
>>>> On Tue, Jan 28, 2014 at 10:53:31PM +0400, Valentine Barshak wrote:
>>>>> This enables DMA bounce for PCI since the controller does
>>>>> not support more than 2G PCI-AHB memory window.
>>>>> The problems with DMA transfers can be observed when
>>>>> setting 2G/2G user/kernel memory split model
>>>>> (CONFIG_VMSPLIT_2G=y)
>>>>> These patches help to avoid it.
>>>>
>>>> Are these patches compatible with other user/kernel splits?
>>>
>>> PS, the bridge is only actually capable of seeing 1GiB of
>>> RAM due to alignment issues in the window. You can have either
>>> 0x4..0x8 or 0x8..0xc but not /both/. If you open the window to
>>> 2GiB then you can see either 0x0..0x8 or 0x8..0xF range.
>>>
>>
>> I don't think this is relater to the user/kernel space memory split.
>>
>> Currently the R-Car Gen2 PCI driver uses 0x40000000 - 0x7fffffff
>> PCI-AHB region. We can set it to 0x00000000 - 0x7fffffff,
>> but there's no RAM below 0x40000000 so no DMA access to that area is
>> actually legal from the PCI USB host driver.
>> So the change wouldn't give us much.
>
> Well, there's IO areas but probably not wanting to DMA to them anyway.
>
>> The 31-bit DMA mask takes care of forbidding any DMA transfers
>> to the area above 0x7fffffff.
>
> I will add this to our current patch series and see if it helps.

Helps with what?

I don't see any issues with the current patches.

Thanks,
Val.

Re: [PATCH RFC 0/2] ARM: shmobile: lager: Enable DMA bounce for PCI

[Ben Dooks]

On 29/01/14 12:47, Valentine wrote:
> On 01/29/2014 04:45 PM, Ben Dooks wrote:
>> On 29/01/14 11:15, Valentine wrote:
>>> On 01/29/2014 12:03 PM, Ben Dooks wrote:
>>>> On 29/01/14 06:45, Simon Horman wrote:
>>>>> On Tue, Jan 28, 2014 at 10:53:31PM +0400, Valentine Barshak wrote:
>>>>>> This enables DMA bounce for PCI since the controller does
>>>>>> not support more than 2G PCI-AHB memory window.
>>>>>> The problems with DMA transfers can be observed when
>>>>>> setting 2G/2G user/kernel memory split model
>>>>>> (CONFIG_VMSPLIT_2G=y)
>>>>>> These patches help to avoid it.
>>>>>
>>>>> Are these patches compatible with other user/kernel splits?
>>>>
>>>> PS, the bridge is only actually capable of seeing 1GiB of
>>>> RAM due to alignment issues in the window. You can have either
>>>> 0x4..0x8 or 0x8..0xc but not /both/. If you open the window to
>>>> 2GiB then you can see either 0x0..0x8 or 0x8..0xF range.
>>>>
>>>
>>> I don't think this is relater to the user/kernel space memory split.
>>>
>>> Currently the R-Car Gen2 PCI driver uses 0x40000000 - 0x7fffffff
>>> PCI-AHB region. We can set it to 0x00000000 - 0x7fffffff,
>>> but there's no RAM below 0x40000000 so no DMA access to that area is
>>> actually legal from the PCI USB host driver.
>>> So the change wouldn't give us much.
>>
>> Well, there's IO areas but probably not wanting to DMA to them anyway.
>>
>>> The 31-bit DMA mask takes care of forbidding any DMA transfers
>>> to the area above 0x7fffffff.
>>
>> I will add this to our current patch series and see if it helps.
>
> Helps with what?
>
> I don't see any issues with the current patches.

We're clearly not testing the same configurations, as all your patches
either are not DT enabled or are for the non-multiplatform kernel
builds. I've tried porting your DMA bounce changes to the
multiplatform board-lager-reference.c file but that has not fixed
the issue for me.

This is the last log I have for looking into the issue:

> h_eth:1 is connected to sh_eth.  Reconnecting to sh_eth
> sh_eth Waiting for PHY auto negotiation to complete.. done
> sh_eth: 100Base/Full
> Using sh_eth device
> TFTP from server 10.24.1.138; our IP address is 10.24.1.143
> Filename 'zImage'.
> Load address: 0x40008000
> Loading: *\b#################################################################
> 	 #################################################################
> 	 #################################################################
> 	 #################################################################
> 	 #################################################################
> 	 #################################################################
> 	 #################################################################
> 	 #################################################################
> 	 #####################
> 	 2.8 MiB/s
> done
> Bytes transferred = 2765921 (2a3461 hex)
> sh_eth:1 is connected to sh_eth.  Reconnecting to sh_eth
> sh_eth Waiting for PHY auto negotiation to complete.. done
> sh_eth: 100Base/Full
> Using sh_eth device
> TFTP from server 10.24.1.138; our IP address is 10.24.1.143
> Filename 'r8a7790-lager.dtb'.
> Load address: 0x40f00000
> Loading: *\b####
> 	 2.8 MiB/s
> done
> Bytes transferred = 17889 (45e1 hex)
>
> Starting kernel ...
>
> Booting Linux on physical CPU 0x0
> Linux version 3.13.0-rc7-bjd1-00072-g3785df4-dirty (ben@rainbowdash) (gcc version 4.6.3 (crosstool-NG 1.17.0) ) #268 SMP Wed Jan 29 15:21:44 GMT 2014
> CPU: ARMv7 Processor [413fc0f2] revision 2 (ARMv7), cr\x10c53c7d
> CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
> Ignoring memory at 0x180000000 outside 32-bit physical address space
> Machine model: Lager
> debug: ignoring loglevel setting.
> Truncating RAM at 40000000-bfffffff to -6f7fffff (vmalloc region overlap).
> cma: CMA: reserved 32 MiB at 6d800000
> Memory policy: Data cache writealloc
> On node 0 totalpages: 194560
> free_area_init_node: node 0, pgdat c056fd00, node_mem_map c0815000
>   DMA zone: 1520 pages used for memmap
>   DMA zone: 0 pages reserved
>   DMA zone: 194560 pages, LIFO batch:31
> ------------[ cut here ]------------
> WARNING: CPU: 0 PID: 0 at /home/ben/ct178/renesas/arch/arm/kernel/devtree.c:147 arm_dt_init_cpu_maps+0x10c/0x1bc()
> DT /cpu 5 nodes greater than max cores 4, capping them
> Modules linked in:
> CPU: 0 PID: 0 Comm: swapper Not tainted 3.13.0-rc7-bjd1-00072-g3785df4-dirty #268
> Backtrace:
> [<c0011df0>] (dump_backtrace+0x0/0x110) from [<c0012160>] (show_stack+0x18/0x1c)
>  r6:c0498aba r5:00000009 r4:00000000 r3:00200000
> [<c0012148>] (show_stack+0x0/0x1c) from [<c03cc5e4>] (dump_stack+0x70/0x8c)
> [<c03cc574>] (dump_stack+0x0/0x8c) from [<c0023b8c>] (warn_slowpath_common+0x6c/0x8c)
>  r4:c0545f00 r3:c0552c98
> [<c0023b20>] (warn_slowpath_common+0x0/0x8c) from [<c0023c50>] (warn_slowpath_fmt+0x38/0x40)
>  r8:c0e08170 r7:00000001 r6:00000000 r5:c0e08514 r4:00000005
> [<c0023c18>] (warn_slowpath_fmt+0x0/0x40) from [<c0513128>] (arm_dt_init_cpu_maps+0x10c/0x1bc)
>  r3:00000005 r2:c0498b15
> [<c051301c>] (arm_dt_init_cpu_maps+0x0/0x1bc) from [<c051224c>] (setup_arch+0x5d8/0x930)
> [<c0511c74>] (setup_arch+0x0/0x930) from [<c0510888>] (start_kernel+0x80/0x31c)
>  r8:4000406a r7:c054f9f0 r6:c0538734 r5:c05709c0 r4:00000001
> [<c0510808>] (start_kernel+0x0/0x31c) from [<40008074>] (0x40008074)
>  r6:c0538734 r5:c054c3cc r4:10c53c7d
> ---[ end trace 3406ff24bd97382e ]---
> PERCPU: Embedded 7 pages/cpu @c0e11000 s7104 r8192 d13376 u32768
> pcpu-alloc: s7104 r8192 d13376 u32768 alloc=8*4096
> pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
> Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 193040
> Kernel command line: console=ttySC6,38400 ignore_loglevel rw root=/dev/nfs ip=dhcp nfsroot\x10.24.1.138:/home/nfsroot/debian-eabi
> PID hash table entries: 4096 (order: 2, 16384 bytes)
> Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
> Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
> Memory: 732584K/778240K available (3880K kernel code, 178K rwdata, 1264K rodata, 206K init, 188K bss, 45656K reserved)
> Virtual kernel memory layout:
>     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
>     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
>     vmalloc : 0xf0000000 - 0xff000000   ( 240 MB)
>     lowmem  : 0xc0000000 - 0xef800000   ( 760 MB)
>     modules : 0xbf000000 - 0xc0000000   (  16 MB)
>       .text : 0xc0008000 - 0xc050f01c   (5149 kB)
>       .init : 0xc0510000 - 0xc0543bc0   ( 207 kB)
>       .data : 0xc0544000 - 0xc0570980   ( 179 kB)
>        .bss : 0xc0570988 - 0xc059fac4   ( 189 kB)
> Hierarchical RCU implementation.
> NR_IRQS:16 nr_irqs:16 16
> Architected cp15 timer(s) running at 10.00MHz (virt).
> sched_clock: 56 bits at 10MHz, resolution 100ns, wraps every 3435973836800ns
> Switching to timer-based delay loop
> Console: colour dummy device 80x30
> Calibrating delay loop (skipped), value calculated using timer frequency.. 20.00 BogoMIPS (lpj\x100000)
> pid_max: default: 32768 minimum: 301
> Mount-cache hash table entries: 512
> CPU: Testing write buffer coherency: ok
> CPU0: update cpu_power 1024
> CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
> Setting up static identity map for 0x403d0da8 - 0x403d0e00
> CPU1: Booted secondary processor
> CPU1: update cpu_power 1024
> CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
> CPU2: Booted secondary processor
> CPU2: update cpu_power 1024
> CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
> CPU3: Booted secondary processor
> CPU3: update cpu_power 1024
> CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
> Brought up 4 CPUs
> SMP: Total of 4 processors activated.
> CPU: All CPU(s) started in SVC mode.
> VFP support v0.3: implementor 41 architecture 4 part 30 variant f rev 0
> pinctrl core: initialized pinctrl subsystem
> regulator-dummy: no parameters
> NET: Registered protocol family 16
> DMA: preallocated 256 KiB pool for atomic coherent allocations
> : enabling platform dma restrictions
> renesas_irqc e61c0000.interrupt-controller: driving 4 irqs
> sh-pfc e6060000.pfc: r8a77900_pfc support registered
> hw-breakpoint: Failed to enable monitor mode on CPU 3.
> No ATAGs?
> bio: create slab <bio-0> at 0
> pci-rcar-gen2 ee090000.pci: PCI: bus0 revision 11
> PCI host bridge to bus 0000:00
> pci_bus 0000:00: root bus resource [io  0xee080000-0xee0810ff]
> pci_bus 0000:00: root bus resource [mem 0xee080000-0xee0810ff]
> pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
> pci_bus 0000:00: scanning bus
> pci 0000:00:00.0: [1033:0000] type 00 class 0x060000
> pci 0000:00:00.0: calling quirk_mmio_always_on+0x0/0x1c
> pci 0000:00:00.0: reg 0x10: [mem 0xee090800-0xee090bff]
> pci 0000:00:00.0: reg 0x14: [mem 0x40000000-0x7fffffff pref]
> pci 0000:00:00.0: calling pci_fixup_ide_bases+0x0/0x58
> pci 0000:00:00.0: dmabounce: registered device
> pci 0000:00:01.0: [1033:0035] type 00 class 0x0c0310
> pci 0000:00:01.0: reg 0x10: [mem 0x00000000-0x00000fff]
> pci 0000:00:01.0: calling pci_fixup_ide_bases+0x0/0x58
> pci 0000:00:01.0: supports D1 D2
> pci 0000:00:01.0: PME# supported from D0 D1 D2 D3hot
> pci 0000:00:01.0: PME# disabled
> pci 0000:00:01.0: dmabounce: registered device
> pci 0000:00:02.0: [1033:00e0] type 00 class 0x0c0320
> pci 0000:00:02.0: reg 0x10: [mem 0x00000000-0x000000ff]
> pci 0000:00:02.0: calling pci_fixup_ide_bases+0x0/0x58
> pci 0000:00:02.0: supports D1 D2
> pci 0000:00:02.0: PME# supported from D0 D1 D2 D3hot
> pci 0000:00:02.0: PME# disabled
> pci 0000:00:02.0: dmabounce: registered device
> pci_bus 0000:00: fixups for bus
> PCI: bus0: Fast back to back transfers disabled
> pci_bus 0000:00: bus scan returning with max\0
> pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00
> pci-rcar-gen2 ee0b0000.pci: PCI: bus1 revision 11
> PCI host bridge to bus 0000:01
> pci_bus 0000:01: root bus resource [io  0xee0a0000-0xee0a10ff]
> pci_bus 0000:01: root bus resource [mem 0xee0a0000-0xee0a10ff]
> pci_bus 0000:01: No busn resource found for root bus, will use [bus 01-ff]
> pci_bus 0000:01: scanning bus
> pci 0000:01:00.0: [1033:0000] type 00 class 0x060000
> pci 0000:01:00.0: calling quirk_mmio_always_on+0x0/0x1c
> pci 0000:01:00.0: reg 0x10: [mem 0xee0b0800-0xee0b0bff]
> pci 0000:01:00.0: reg 0x14: [mem 0x40000000-0x7fffffff pref]
> pci 0000:01:00.0: calling pci_fixup_ide_bases+0x0/0x58
> pci 0000:01:00.0: dmabounce: registered device
> pci 0000:01:01.0: [1033:0035] type 00 class 0x0c0310
> pci 0000:01:01.0: reg 0x10: [mem 0x00000000-0x00000fff]
> pci 0000:01:01.0: calling pci_fixup_ide_bases+0x0/0x58
> pci 0000:01:01.0: supports D1 D2
> pci 0000:01:01.0: PME# supported from D0 D1 D2 D3hot
> pci 0000:01:01.0: PME# disabled
> pci 0000:01:01.0: dmabounce: registered device
> pci 0000:01:02.0: [1033:00e0] type 00 class 0x0c0320
> pci 0000:01:02.0: reg 0x10: [mem 0x00000000-0x000000ff]
> pci 0000:01:02.0: calling pci_fixup_ide_bases+0x0/0x58
> pci 0000:01:02.0: supports D1 D2
> pci 0000:01:02.0: PME# supported from D0 D1 D2 D3hot
> pci 0000:01:02.0: PME# disabled
> pci 0000:01:02.0: dmabounce: registered device
> pci_bus 0000:01: fixups for bus
> PCI: bus1: Fast back to back transfers disabled
> pci_bus 0000:01: bus scan returning with max\x01
> pci_bus 0000:01: busn_res: [bus 01-ff] end is updated to 01
> pci-rcar-gen2 ee0d0000.pci: PCI: bus2 revision 11
> PCI host bridge to bus 0000:02
> pci_bus 0000:02: root bus resource [io  0xee0c0000-0xee0c10ff]
> pci_bus 0000:02: root bus resource [mem 0xee0c0000-0xee0c10ff]
> pci_bus 0000:02: No busn resource found for root bus, will use [bus 02-ff]
> pci_bus 0000:02: scanning bus
> pci 0000:02:00.0: [1033:0000] type 00 class 0x060000
> pci 0000:02:00.0: calling quirk_mmio_always_on+0x0/0x1c
> pci 0000:02:00.0: reg 0x10: [mem 0xee0d0800-0xee0d0bff]
> pci 0000:02:00.0: reg 0x14: [mem 0x40000000-0x7fffffff pref]
> pci 0000:02:00.0: calling pci_fixup_ide_bases+0x0/0x58
> pci 0000:02:00.0: dmabounce: registered device
> pci 0000:02:01.0: [1033:0035] type 00 class 0x0c0310
> pci 0000:02:01.0: reg 0x10: [mem 0x00000000-0x00000fff]
> pci 0000:02:01.0: calling pci_fixup_ide_bases+0x0/0x58
> pci 0000:02:01.0: supports D1 D2
> pci 0000:02:01.0: PME# supported from D0 D1 D2 D3hot
> pci 0000:02:01.0: PME# disabled
> pci 0000:02:01.0: dmabounce: registered device
> pci 0000:02:02.0: [1033:00e0] type 00 class 0x0c0320
> pci 0000:02:02.0: reg 0x10: [mem 0x00000000-0x000000ff]
> pci 0000:02:02.0: calling pci_fixup_ide_bases+0x0/0x58
> pci 0000:02:02.0: supports D1 D2
> pci 0000:02:02.0: PME# supported from D0 D1 D2 D3hot
> pci 0000:02:02.0: PME# disabled
> pci 0000:02:02.0: dmabounce: registered device
> pci_bus 0000:02: fixups for bus
> PCI: bus2: Fast back to back transfers disabled
> pci_bus 0000:02: bus scan returning with max\x02
> pci_bus 0000:02: busn_res: [bus 02-ff] end is updated to 02
> pci 0000:00:00.0: fixup irq: got 140
> pci 0000:00:00.0: assigning IRQ 140
> pci 0000:00:01.0: fixup irq: got 140
> pci 0000:00:01.0: assigning IRQ 140
> pci 0000:00:02.0: fixup irq: got 140
> pci 0000:00:02.0: assigning IRQ 140
> pci 0000:01:00.0: fixup irq: got 144
> pci 0000:01:00.0: assigning IRQ 144
> pci 0000:01:01.0: fixup irq: got 144
> pci 0000:01:01.0: assigning IRQ 144
> pci 0000:01:02.0: fixup irq: got 144
> pci 0000:01:02.0: assigning IRQ 144
> pci 0000:02:00.0: fixup irq: got 145
> pci 0000:02:00.0: assigning IRQ 145
> pci 0000:02:01.0: fixup irq: got 145
> pci 0000:02:01.0: assigning IRQ 145
> pci 0000:02:02.0: fixup irq: got 145
> pci 0000:02:02.0: assigning IRQ 145
> pci 0000:02:01.0: BAR 0: assigned [mem 0xee0c0000-0xee0c0fff]
> pci 0000:02:01.0: BAR 0: set to [mem 0xee0c0000-0xee0c0fff] (PCI address [0xee0c0000-0xee0c0fff])
> pci 0000:02:02.0: BAR 0: assigned [mem 0xee0c1000-0xee0c10ff]
> pci 0000:02:02.0: BAR 0: set to [mem 0xee0c1000-0xee0c10ff] (PCI address [0xee0c1000-0xee0c10ff])
> pci 0000:01:01.0: BAR 0: assigned [mem 0xee0a0000-0xee0a0fff]
> pci 0000:01:01.0: BAR 0: set to [mem 0xee0a0000-0xee0a0fff] (PCI address [0xee0a0000-0xee0a0fff])
> pci 0000:01:02.0: BAR 0: assigned [mem 0xee0a1000-0xee0a10ff]
> pci 0000:01:02.0: BAR 0: set to [mem 0xee0a1000-0xee0a10ff] (PCI address [0xee0a1000-0xee0a10ff])
> pci 0000:00:01.0: BAR 0: assigned [mem 0xee080000-0xee080fff]
> pci 0000:00:01.0: BAR 0: set to [mem 0xee080000-0xee080fff] (PCI address [0xee080000-0xee080fff])
> pci 0000:00:02.0: BAR 0: assigned [mem 0xee081000-0xee0810ff]
> pci 0000:00:02.0: BAR 0: set to [mem 0xee081000-0xee0810ff] (PCI address [0xee081000-0xee0810ff])
> fixed-3.3V: 3300 mV
> vgaarb: loaded
> SCSI subsystem initialized
> usbcore: registered new interface driver usbfs
> usbcore: registered new interface driver hub
> usbcore: registered new device driver usb
> media: Linux media interface: v0.10
> Linux video capture interface: v2.00
> sh_cmt sh_cmt.0: used for clock events
> Switched to clocksource arch_sys_counter
> i2c-rcar e6508000.i2c: probed
> i2c-rcar e6518000.i2c: probed
> i2c-rcar e6530000.i2c: probed
> i2c-rcar e6540000.i2c: probed
> NET: Registered protocol family 2
> TCP established hash table entries: 8192 (order: 3, 32768 bytes)
> TCP bind hash table entries: 8192 (order: 4, 65536 bytes)
> TCP: Hash tables configured (established 8192 bind 8192)
> TCP: reno registered
> UDP hash table entries: 512 (order: 2, 16384 bytes)
> UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
> NET: Registered protocol family 1
> RPC: Registered named UNIX socket transport module.
> RPC: Registered udp transport module.
> RPC: Registered tcp transport module.
> RPC: Registered tcp NFSv4.1 backchannel transport module.
> pci 0000:00:01.0: calling quirk_usb_early_handoff+0x0/0x7a8
> PCI: enabling device 0000:00:01.0 (0140 -> 0142)
> pci 0000:00:02.0: calling quirk_usb_early_handoff+0x0/0x7a8
> PCI: enabling device 0000:00:02.0 (0140 -> 0142)
> pci 0000:01:01.0: calling quirk_usb_early_handoff+0x0/0x7a8
> PCI: enabling device 0000:01:01.0 (0140 -> 0142)
> pci 0000:01:02.0: calling quirk_usb_early_handoff+0x0/0x7a8
> PCI: enabling device 0000:01:02.0 (0140 -> 0142)
> pci 0000:02:01.0: calling quirk_usb_early_handoff+0x0/0x7a8
> PCI: enabling device 0000:02:01.0 (0140 -> 0142)
> pci 0000:02:02.0: calling quirk_usb_early_handoff+0x0/0x7a8
> PCI: enabling device 0000:02:02.0 (0140 -> 0142)
> PCI: CLS 64 bytes, default 64
> NFS: Registering the id_resolver key type
> Key type id_resolver registered
> Key type id_legacy registered
> nfs4filelayout_init: NFSv4 File Layout Driver Registering...
> msgmni has been set to 1494
> io scheduler noop registered (default)
> gpio_rcar e6050000.gpio: driving 32 GPIOs
> gpio_rcar e6051000.gpio: driving 32 GPIOs
> gpio_rcar e6052000.gpio: driving 32 GPIOs
> gpio_rcar e6053000.gpio: driving 32 GPIOs
> gpio_rcar e6054000.gpio: driving 32 GPIOs
> gpio_rcar e6055000.gpio: driving 32 GPIOs
> SuperH (H)SCI(F) driver initialized
> sh-sci.0: ttySC0 at MMIO 0xe6c40000 (irq = 176, base_baud = 0) is a scifa
> sh-sci.1: ttySC1 at MMIO 0xe6c50000 (irq = 177, base_baud = 0) is a scifa
> sh-sci.2: ttySC2 at MMIO 0xe6c20000 (irq = 180, base_baud = 0) is a scifb
> sh-sci.3: ttySC3 at MMIO 0xe6c30000 (irq = 181, base_baud = 0) is a scifb
> sh-sci.4: ttySC4 at MMIO 0xe6ce0000 (irq = 182, base_baud = 0) is a scifb
> sh-sci.5: ttySC5 at MMIO 0xe6c60000 (irq = 183, base_baud = 0) is a scifa
> sh-sci.6: ttySC6 at MMIO 0xe6e60000 (irq = 184, base_baud = 0) is a scif
> console [ttySC6] enabled
> sh-sci.7: ttySC7 at MMIO 0xe6e68000 (irq = 185, base_baud = 0) is a scif
> sh-sci.8: ttySC8 at MMIO 0xe62c0000 (irq = 186, base_baud = 0) is a hscif
> sh-sci.9: ttySC9 at MMIO 0xe62c8000 (irq = 187, base_baud = 0) is a hscif
> [drm] Initialized drm 1.1.0 20060810
> rcar-du feb00000.rcar-du: counting nodes...
> rcar-du feb00000.rcar-du: looking for output0
> adv7511 2-0039: got to 810
> adv7511 2-0039: got to 868
> adv7511 2-0039: got to 883
> adv7511 2-0039: did not get hpd event
> rcar-du feb00000.rcar-du: setting hdmi slave configuration
> rcar-du feb00000.rcar-du: looking for output1
> rcar-du feb00000.rcar-du: no output selected
> Console: switching to colour frame buffer device 240x67
> rcar-du feb00000.rcar-du: fb0:  frame buffer device
> rcar-du feb00000.rcar-du: registered panic notifier
> [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
> [drm] No driver support for vblank timestamp query.
> [drm] Initialized rcar-du 1.0.0 20130110 on minor 0
> sh-pfc e6060000.pfc: DT node must contain at least a function or config
> sh-pfc e6060000.pfc: no mapping found in node /pfc@e6060000/eth
> sh-eth ee700000.sh_net: match c0564218 (renesas,r8a7790-ether)
> sh-eth ee700000.sh_net: new platform data ed35d890
> sh-pfc e6060000.pfc: DT node must contain at least a function or config
> sh-pfc e6060000.pfc: no mapping found in node /pfc@e6060000/eth
> sh-eth ee700000.sh_net: set default pinctrl
> lager_ksz8041_fixup: called for phy ed2ab400 (drv   (null))
> lager_ksz8041_fixup: phy id 0000,0000
> libphy: sh_mii: probed
> Base address at 0xee700000, 2e:09:0a:00:3d:e0, IRQ 194.
> ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> ehci-pci: EHCI PCI platform driver
> ehci-pci 0000:00:02.0: enabling bus mastering
> ehci-pci 0000:00:02.0: EHCI Host Controller
> ehci-pci 0000:00:02.0: new USB bus registered, assigned bus number 1
> ehci-pci 0000:00:02.0: enabling Mem-Wr-Inval
> ehci-pci 0000:00:02.0: irq 140, io mem 0xee081000
> ehci-pci 0000:00:02.0: USB 2.0 started, EHCI 1.00
> usb usb1: New USB device found, idVendor\x1d6b, idProduct\002
> usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
> usb usb1: Product: EHCI Host Controller
> usb usb1: Manufacturer: Linux 3.13.0-rc7-bjd1-00072-g3785df4-dirty ehci_hcd
> usb usb1: SerialNumber: 0000:00:02.0
> hub 1-0:1.0: USB hub found
> hub 1-0:1.0: 1 port detected
> ehci-pci 0000:01:02.0: enabling bus mastering
> ehci-pci 0000:01:02.0: EHCI Host Controller
> ehci-pci 0000:01:02.0: new USB bus registered, assigned bus number 2
> ehci-pci 0000:01:02.0: enabling Mem-Wr-Inval
> ehci-pci 0000:01:02.0: irq 144, io mem 0xee0a1000
> ehci-pci 0000:01:02.0: USB 2.0 started, EHCI 1.00
> usb usb2: New USB device found, idVendor\x1d6b, idProduct\002
> usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
> usb usb2: Product: EHCI Host Controller
> usb usb2: Manufacturer: Linux 3.13.0-rc7-bjd1-00072-g3785df4-dirty ehci_hcd
> usb usb2: SerialNumber: 0000:01:02.0
> hub 2-0:1.0: USB hub found
> hub 2-0:1.0: 1 port detected
> ehci-pci 0000:02:02.0: enabling bus mastering
> ehci-pci 0000:02:02.0: EHCI Host Controller
> ehci-pci 0000:02:02.0: new USB bus registered, assigned bus number 3
> ehci-pci 0000:02:02.0: enabling Mem-Wr-Inval
> ehci-pci 0000:02:02.0: irq 145, io mem 0xee0c1000
> ehci-pci 0000:02:02.0: USB 2.0 started, EHCI 1.00
> usb usb3: New USB device found, idVendor\x1d6b, idProduct\002
> usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
> usb usb3: Product: EHCI Host Controller
> usb usb3: Manufacturer: Linux 3.13.0-rc7-bjd1-00072-g3785df4-dirty ehci_hcd
> usb usb3: SerialNumber: 0000:02:02.0
> hub 3-0:1.0: USB hub found
> hub 3-0:1.0: 1 port detected
> ehci-platform: EHCI generic platform driver
> ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> ohci-pci: OHCI PCI platform driver
> ohci-pci 0000:00:01.0: enabling bus mastering
> ohci-pci 0000:00:01.0: OHCI PCI host controller
> ohci-pci 0000:00:01.0: new USB bus registered, assigned bus number 4
> ohci-pci 0000:00:01.0: read 00000000 from 0004
> ohci-pci 0000:00:01.0: write 80000000 to 0014
> ohci-pci 0000:00:01.0: read 00000000 from 0004
> ohci-pci 0000:00:01.0: read 0f000901 from 0048
> ohci-pci 0000:00:01.0: irq 140, io mem 0xee080000
> ohci-pci 0000:00:01.0: read 00002edf from 0034
> ohci-pci 0000:00:01.0: write 00000200 to 0004
> ohci-pci 0000:00:01.0: read 00000000 from 0004
> ohci-pci 0000:00:01.0: write 00000001 to 0008
> ohci-pci 0000:00:01.0: read 00000000 from 0008
> ohci-pci 0000:00:01.0: write 00000000 to 0020
> ohci-pci 0000:00:01.0: write 00000000 to 0028
> ohci-pci 0000:00:01.0: write 6d803000 to 0018
> ohci-pci 0000:00:01.0: read 00002edf from 0034
> ohci-pci 0000:00:01.0: write a7782edf to 0034
> ohci-pci 0000:00:01.0: write 00002a2f to 0040
> ohci-pci 0000:00:01.0: read 00002edf from 0034
> ohci-pci 0000:00:01.0: write 00000001 to 0008
> ohci-pci 0000:00:01.0: read 00000000 from 0008
> ohci-pci 0000:00:01.0: write 00000200 to 0004
> ohci-pci 0000:00:01.0: read 00000000 from 0004
> ohci-pci 0000:00:01.0: write 00000000 to 0020
> ohci-pci 0000:00:01.0: write 00000000 to 0028
> ohci-pci 0000:00:01.0: write 6d803000 to 0018
> ohci-pci 0000:00:01.0: read 00002edf from 0034
> ohci-pci 0000:00:01.0: write a7782edf to 0034
> ohci-pci 0000:00:01.0: write 00002a2f to 0040
> ohci-pci 0000:00:01.0: read 00002edf from 0034
> ohci-pci 0000:00:01.0: read 00002edf from 0034
> ohci-pci 0000:00:01.0: read 00000000 from 0040
> ohci-pci 0000:00:01.0: init err (00002edf 0000)
> ohci-pci 0000:00:01.0: can't start
> ohci-pci 0000:00:01.0: write 80000000 to 0014
> ohci-pci 0000:00:01.0: read 00000000 from 0004
> ohci-pci 0000:00:01.0: write 00000000 to 0004
> ohci-pci 0000:00:01.0: startup error -75
> ohci-pci 0000:00:01.0: USB bus 4 deregistered
> ohci-pci 0000:00:01.0: init 0000:00:01.0 fail, -75
> ohci-pci: probe of 0000:00:01.0 failed with error -75
> ohci-pci 0000:01:01.0: enabling bus mastering
> ohci-pci 0000:01:01.0: OHCI PCI host controller
> ohci-pci 0000:01:01.0: new USB bus registered, assigned bus number 4
> ohci-pci 0000:01:01.0: read 00000000 from 0004
> ohci-pci 0000:01:01.0: write 80000000 to 0014
> ohci-pci 0000:01:01.0: read 00000000 from 0004
> ohci-pci 0000:01:01.0: read 0f000901 from 0048
> ohci-pci 0000:01:01.0: irq 144, io mem 0xee0a0000
> ohci-pci 0000:01:01.0: read 00002edf from 0034
> ohci-pci 0000:01:01.0: write 00000200 to 0004
> ohci-pci 0000:01:01.0: read 00000200 from 0004
> ohci-pci 0000:01:01.0: write 00000001 to 0008
> ohci-pci 0000:01:01.0: read 00000000 from 0008
> ohci-pci 0000:01:01.0: write 00000000 to 0020
> ohci-pci 0000:01:01.0: write 00000000 to 0028
> ohci-pci 0000:01:01.0: write 6d803000 to 0018
> ohci-pci 0000:01:01.0: read 00002edf from 0034
> ohci-pci 0000:01:01.0: write a7782edf to 0034
> ohci-pci 0000:01:01.0: write 00002a2f to 0040
> ohci-pci 0000:01:01.0: read a7782edf from 0034
> ohci-pci 0000:01:01.0: read 00002a2f from 0040
> ohci-pci 0000:01:01.0: write 00000283 to 0004
> ohci-pci 0000:01:01.0: write 00008000 to 0050
> ohci-pci 0000:01:01.0: write ffffffff to 000c
> ohci-pci 0000:01:01.0: write 8000005a to 0010
> ohci-pci 0000:01:01.0: read 0f000901 from 0048
> ohci-pci 0000:01:01.0: write 0f000201 to 0048
> ohci-pci 0000:01:01.0: write 00010000 to 0050
> ohci-pci 0000:01:01.0: write 00000000 to 004c
> ohci-pci 0000:01:01.0: read 00000283 from 0004
> usb usb4: New USB device found, idVendor\x1d6b, idProduct\001
> usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
> usb usb4: Product: OHCI PCI host controller
> usb usb4: Manufacturer: Linux 3.13.0-rc7-bjd1-00072-g3785df4-dirty ohci_hcd
> usb usb4: SerialNumber: 0000:01:01.0
> hub 4-0:1.0: USB hub found
> ohci-pci 0000:01:01.0: read 0f000201 from 0048
> ohci-pci 0000:01:01.0: read 00000000 from 004c
> hub 4-0:1.0: 1 port detected
> ohci-pci 0000:01:01.0: read 00008000 from 0050
> ohci-pci 0000:01:01.0: write 00000100 to 0054
> ohci-pci 0000:01:01.0: read 00008000 from 0050
> ohci-pci 0000:01:01.0: write 00000040 to 000c
> ohci-pci 0000:01:01.0: read 00000004 from 000c
> ohci-pci 0000:01:01.0: read 00000100 from 0054
> ohci-pci 0000:01:01.0: read 8000005a from 0010
> ohci-pci 0000:02:01.0: enabling bus mastering
> ohci-pci 0000:02:01.0: OHCI PCI host controller
> ohci-pci 0000:02:01.0: new USB bus registered, assigned bus number 5
> ohci-pci 0000:02:01.0: read 00000000 from 0004
> ohci-pci 0000:02:01.0: write 80000000 to 0014
> ohci-pci 0000:02:01.0: read 00000000 from 0004
> ohci-pci 0000:02:01.0: read 0f000901 from 0048
> ohci-pci 0000:02:01.0: irq 145, io mem 0xee0c0000
> ohci-pci 0000:02:01.0: read 00002edf from 0034
> ohci-pci 0000:02:01.0: write 00000200 to 0004
> ohci-pci 0000:02:01.0: read 00000200 from 0004
> ohci-pci 0000:01:01.0: read 00000100 from 0054
> ohci-pci 0000:01:01.0: read 00000283 from 0004
> ohci-pci 0000:01:01.0: write 000006c3 to 0004
> ohci-pci 0000:01:01.0: read 000006c3 from 0004
> ohci-pci 0000:01:01.0: read 00008000 from 0050
> ohci-pci 0000:02:01.0: write 00000001 to 0008
> ohci-pci 0000:02:01.0: read 00000000 from 0008
> ohci-pci 0000:02:01.0: write 00000000 to 0020
> ohci-pci 0000:02:01.0: write 00000000 to 0028
> ohci-pci 0000:02:01.0: write 6d804000 to 0018
> ohci-pci 0000:02:01.0: read 00002edf from 0034
> ohci-pci 0000:02:01.0: write a7782edf to 0034
> ohci-pci 0000:02:01.0: write 00002a2f to 0040
> ohci-pci 0000:02:01.0: read a7782edf from 0034
> ohci-pci 0000:02:01.0: read 00002a2f from 0040
> ohci-pci 0000:02:01.0: write 00000283 to 0004
> ohci-pci 0000:02:01.0: write 00008000 to 0050
> ohci-pci 0000:02:01.0: write ffffffff to 000c
> ohci-pci 0000:02:01.0: write 8000005a to 0010
> ohci-pci 0000:02:01.0: read 0f000901 from 0048
> ohci-pci 0000:02:01.0: write 0f000201 to 0048
> ohci-pci 0000:02:01.0: write 00010000 to 0050
> ohci-pci 0000:02:01.0: write 00000000 to 004c
> ohci-pci 0000:02:01.0: read 00000283 from 0004
> usb usb5: New USB device found, idVendor\x1d6b, idProduct\001
> usb usb5: New USB device strings: Mfr=3, Product=2, SerialNumber=1
> usb usb5: Product: OHCI PCI host controller
> usb usb5: Manufacturer: Linux 3.13.0-rc7-bjd1-00072-g3785df4-dirty ohci_hcd
> usb usb5: SerialNumber: 0000:02:01.0
> hub 5-0:1.0: USB hub found
> ohci-pci 0000:02:01.0: read 0f000201 from 0048
> ohci-pci 0000:02:01.0: read 00000000 from 004c
> hub 5-0:1.0: 1 port detected
> ohci-pci 0000:02:01.0: read 00008000 from 0050
> ohci-pci 0000:02:01.0: write 00000100 to 0054
> ohci-pci 0000:02:01.0: read 00008000 from 0050
> ohci-pci 0000:02:01.0: write 00000040 to 000c
> ohci-pci 0000:02:01.0: read 00000004 from 000c
> ohci-pci 0000:02:01.0: read 00000100 from 0054
> ohci-pci 0000:02:01.0: read 8000005a from 0010
> ohci-platform: OHCI generic platform driver
> usbcore: registered new interface driver cdc_acm
> cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
> usbcore: registered new interface driver usb-storage
> usbcore: registered new interface driver usbserial
> usbcore: registered new interface driver usbserial_generic
> usbserial: USB Serial support registered for generic
> mousedev: PS/2 mouse device common for all mice
> i2c /dev entries driver
> rcar_thermal e61f0000.thermal: 1 sensor probed
> sh_mmcif ee220000.mmc: dummy supplies not allowed
> of_dma_request_slave_channel: dma-names property of node '/mmc@ee220000' missing or empty
> sh_mmcif ee220000.mmc: driver version 2010-04-28
> mmc0: BKOPS_EN bit is not set
> mmc0: new high speed MMC card at address 0001
> ohci-pci 0000:02:01.0: read 00000100 from 0054
> ohci-pci 0000:01:01.0: write 00000040 to 000c
> ohci-pci 0000:01:01.0: read 00000004 from 000c
> ohci-pci 0000:01:01.0: read 00000100 from 0054
> ohci-pci 0000:01:01.0: read 8000005a from 0010
> ohci-pci 0000:02:01.0: read 00000283 from 0004
> ohci-pci 0000:02:01.0: write 000006c3 to 0004
> ohci-pci 0000:02:01.0: read 000006c3 from 0004
> ohci-pci 0000:02:01.0: read 00008000 from 0050
> isa bounce pool size: 16 pages
> mmcblk0: mmc0:0001 MMC08G 7.32 GiB
> mmcblk0boot0: mmc0:0001 MMC08G partition 1 2.00 MiB
> mmcblk0boot1: mmc0:0001 MMC08G partition 2 2.00 MiB
> usbcore: registered new interface driver usbhid
> usbhid: USB HID core driver
>  mmcblk0: unknown partition table
>  mmcblk0boot1: unknown partition table
>  mmcblk0boot0: unknown partition table
> ohci-pci 0000:02:01.0: write 00000040 to 000c
> ohci-pci 0000:02:01.0: read 00000004 from 000c
> ohci-pci 0000:02:01.0: read 00000100 from 0054
> ohci-pci 0000:02:01.0: read 8000005a from 0010
> TCP: cubic registered
> NET: Registered protocol family 17
> NET: Registered protocol family 15
> Key type dns_resolver registered
> /home/ben/ct178/renesas/drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
> lager_ksz8041_fixup: called for phy ed2ab400 (drv c0562fac)
> lager_ksz8041_fixup: phy id 0022,1537
> net eth0: attached phy 1 to driver Generic PHY
> Sending DHCP requests .




-- 
Ben Dooks				http://www.codethink.co.uk/
Senior Engineer				Codethink - Providing Genius

Re: [PATCH RFC 0/2] ARM: shmobile: lager: Enable DMA bounce for PCI

[Valentine]

On 01/29/2014 08:03 PM, Ben Dooks wrote:
> On 29/01/14 12:47, Valentine wrote:
>> On 01/29/2014 04:45 PM, Ben Dooks wrote:
>>> On 29/01/14 11:15, Valentine wrote:
>>>> On 01/29/2014 12:03 PM, Ben Dooks wrote:
>>>>> On 29/01/14 06:45, Simon Horman wrote:
>>>>>> On Tue, Jan 28, 2014 at 10:53:31PM +0400, Valentine Barshak wrote:
>>>>>>> This enables DMA bounce for PCI since the controller does
>>>>>>> not support more than 2G PCI-AHB memory window.
>>>>>>> The problems with DMA transfers can be observed when
>>>>>>> setting 2G/2G user/kernel memory split model
>>>>>>> (CONFIG_VMSPLIT_2G=y)
>>>>>>> These patches help to avoid it.
>>>>>>
>>>>>> Are these patches compatible with other user/kernel splits?
>>>>>
>>>>> PS, the bridge is only actually capable of seeing 1GiB of
>>>>> RAM due to alignment issues in the window. You can have either
>>>>> 0x4..0x8 or 0x8..0xc but not /both/. If you open the window to
>>>>> 2GiB then you can see either 0x0..0x8 or 0x8..0xF range.
>>>>>
>>>>
>>>> I don't think this is relater to the user/kernel space memory split.
>>>>
>>>> Currently the R-Car Gen2 PCI driver uses 0x40000000 - 0x7fffffff
>>>> PCI-AHB region. We can set it to 0x00000000 - 0x7fffffff,
>>>> but there's no RAM below 0x40000000 so no DMA access to that area is
>>>> actually legal from the PCI USB host driver.
>>>> So the change wouldn't give us much.
>>>
>>> Well, there's IO areas but probably not wanting to DMA to them anyway.
>>>
>>>> The 31-bit DMA mask takes care of forbidding any DMA transfers
>>>> to the area above 0x7fffffff.
>>>
>>> I will add this to our current patch series and see if it helps.
>>
>> Helps with what?
>>
>> I don't see any issues with the current patches.
>
> We're clearly not testing the same configurations, as all your patches
> either are not DT enabled or are for the non-multiplatform kernel
> builds. I've tried porting your DMA bounce changes to the
> multiplatform board-lager-reference.c file but that has not fixed
> the issue for me.

Yes, my patches are not for the DT support. They have been around for quite
a while and my goal is to have them applied first and add DT later.

You've probably done something wrong while trying to support multiplatform.
It looks like you're either missing the patches mentioned here:
http://marc.info/?l=linux-sh&m\x139060253506760&w=2
or you're not binding the PCI devices to the USB phy.
Do you have USB R-Car Gen2 phy driver enabled?
I don't see ehci/ochi probe being deferred until USB phy is ready.
That's why you see this error.

Please, discard your own follow the steps from the link above.
I think you mentioned lately that you had tried the non-multiplatform version
and it had not worked for you. Did you actually try it?

Thanks,
Val.

>
> This is the last log I have for looking into the issue:
>
>> h_eth:1 is connected to sh_eth.  Reconnecting to sh_eth
>> sh_eth Waiting for PHY auto negotiation to complete.. done
>> sh_eth: 100Base/Full
>> Using sh_eth device
>> TFTP from server 10.24.1.138; our IP address is 10.24.1.143
>> Filename 'zImage'.
>> Load address: 0x40008000
>> Loading: *\b#################################################################
>>      #################################################################
>>      #################################################################
>>      #################################################################
>>      #################################################################
>>      #################################################################
>>      #################################################################
>>      #################################################################
>>      #####################
>>      2.8 MiB/s
>> done
>> Bytes transferred = 2765921 (2a3461 hex)
>> sh_eth:1 is connected to sh_eth.  Reconnecting to sh_eth
>> sh_eth Waiting for PHY auto negotiation to complete.. done
>> sh_eth: 100Base/Full
>> Using sh_eth device
>> TFTP from server 10.24.1.138; our IP address is 10.24.1.143
>> Filename 'r8a7790-lager.dtb'.
>> Load address: 0x40f00000
>> Loading: *\b####
>>      2.8 MiB/s
>> done
>> Bytes transferred = 17889 (45e1 hex)
>>
>> Starting kernel ...
>>
>> Booting Linux on physical CPU 0x0
>> Linux version 3.13.0-rc7-bjd1-00072-g3785df4-dirty (ben@rainbowdash) (gcc version 4.6.3 (crosstool-NG 1.17.0) ) #268 SMP Wed Jan 29 15:21:44 GMT 2014
>> CPU: ARMv7 Processor [413fc0f2] revision 2 (ARMv7), cr\x10c53c7d
>> CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
>> Ignoring memory at 0x180000000 outside 32-bit physical address space
>> Machine model: Lager
>> debug: ignoring loglevel setting.
>> Truncating RAM at 40000000-bfffffff to -6f7fffff (vmalloc region overlap).
>> cma: CMA: reserved 32 MiB at 6d800000
>> Memory policy: Data cache writealloc
>> On node 0 totalpages: 194560
>> free_area_init_node: node 0, pgdat c056fd00, node_mem_map c0815000
>>   DMA zone: 1520 pages used for memmap
>>   DMA zone: 0 pages reserved
>>   DMA zone: 194560 pages, LIFO batch:31
>> ------------[ cut here ]------------
>> WARNING: CPU: 0 PID: 0 at /home/ben/ct178/renesas/arch/arm/kernel/devtree.c:147 arm_dt_init_cpu_maps+0x10c/0x1bc()
>> DT /cpu 5 nodes greater than max cores 4, capping them
>> Modules linked in:
>> CPU: 0 PID: 0 Comm: swapper Not tainted 3.13.0-rc7-bjd1-00072-g3785df4-dirty #268
>> Backtrace:
>> [<c0011df0>] (dump_backtrace+0x0/0x110) from [<c0012160>] (show_stack+0x18/0x1c)
>>  r6:c0498aba r5:00000009 r4:00000000 r3:00200000
>> [<c0012148>] (show_stack+0x0/0x1c) from [<c03cc5e4>] (dump_stack+0x70/0x8c)
>> [<c03cc574>] (dump_stack+0x0/0x8c) from [<c0023b8c>] (warn_slowpath_common+0x6c/0x8c)
>>  r4:c0545f00 r3:c0552c98
>> [<c0023b20>] (warn_slowpath_common+0x0/0x8c) from [<c0023c50>] (warn_slowpath_fmt+0x38/0x40)
>>  r8:c0e08170 r7:00000001 r6:00000000 r5:c0e08514 r4:00000005
>> [<c0023c18>] (warn_slowpath_fmt+0x0/0x40) from [<c0513128>] (arm_dt_init_cpu_maps+0x10c/0x1bc)
>>  r3:00000005 r2:c0498b15
>> [<c051301c>] (arm_dt_init_cpu_maps+0x0/0x1bc) from [<c051224c>] (setup_arch+0x5d8/0x930)
>> [<c0511c74>] (setup_arch+0x0/0x930) from [<c0510888>] (start_kernel+0x80/0x31c)
>>  r8:4000406a r7:c054f9f0 r6:c0538734 r5:c05709c0 r4:00000001
>> [<c0510808>] (start_kernel+0x0/0x31c) from [<40008074>] (0x40008074)
>>  r6:c0538734 r5:c054c3cc r4:10c53c7d
>> ---[ end trace 3406ff24bd97382e ]---
>> PERCPU: Embedded 7 pages/cpu @c0e11000 s7104 r8192 d13376 u32768
>> pcpu-alloc: s7104 r8192 d13376 u32768 alloc=8*4096
>> pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
>> Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 193040
>> Kernel command line: console=ttySC6,38400 ignore_loglevel rw root=/dev/nfs ip=dhcp nfsroot\x10.24.1.138:/home/nfsroot/debian-eabi
>> PID hash table entries: 4096 (order: 2, 16384 bytes)
>> Dentry cache hash table entries: 131072 (order: 7, 524288 bytes)
>> Inode-cache hash table entries: 65536 (order: 6, 262144 bytes)
>> Memory: 732584K/778240K available (3880K kernel code, 178K rwdata, 1264K rodata, 206K init, 188K bss, 45656K reserved)
>> Virtual kernel memory layout:
>>     vector  : 0xffff0000 - 0xffff1000   (   4 kB)
>>     fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
>>     vmalloc : 0xf0000000 - 0xff000000   ( 240 MB)
>>     lowmem  : 0xc0000000 - 0xef800000   ( 760 MB)
>>     modules : 0xbf000000 - 0xc0000000   (  16 MB)
>>       .text : 0xc0008000 - 0xc050f01c   (5149 kB)
>>       .init : 0xc0510000 - 0xc0543bc0   ( 207 kB)
>>       .data : 0xc0544000 - 0xc0570980   ( 179 kB)
>>        .bss : 0xc0570988 - 0xc059fac4   ( 189 kB)
>> Hierarchical RCU implementation.
>> NR_IRQS:16 nr_irqs:16 16
>> Architected cp15 timer(s) running at 10.00MHz (virt).
>> sched_clock: 56 bits at 10MHz, resolution 100ns, wraps every 3435973836800ns
>> Switching to timer-based delay loop
>> Console: colour dummy device 80x30
>> Calibrating delay loop (skipped), value calculated using timer frequency.. 20.00 BogoMIPS (lpj\x100000)
>> pid_max: default: 32768 minimum: 301
>> Mount-cache hash table entries: 512
>> CPU: Testing write buffer coherency: ok
>> CPU0: update cpu_power 1024
>> CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
>> Setting up static identity map for 0x403d0da8 - 0x403d0e00
>> CPU1: Booted secondary processor
>> CPU1: update cpu_power 1024
>> CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
>> CPU2: Booted secondary processor
>> CPU2: update cpu_power 1024
>> CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
>> CPU3: Booted secondary processor
>> CPU3: update cpu_power 1024
>> CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
>> Brought up 4 CPUs
>> SMP: Total of 4 processors activated.
>> CPU: All CPU(s) started in SVC mode.
>> VFP support v0.3: implementor 41 architecture 4 part 30 variant f rev 0
>> pinctrl core: initialized pinctrl subsystem
>> regulator-dummy: no parameters
>> NET: Registered protocol family 16
>> DMA: preallocated 256 KiB pool for atomic coherent allocations
>> : enabling platform dma restrictions
>> renesas_irqc e61c0000.interrupt-controller: driving 4 irqs
>> sh-pfc e6060000.pfc: r8a77900_pfc support registered
>> hw-breakpoint: Failed to enable monitor mode on CPU 3.
>> No ATAGs?
>> bio: create slab <bio-0> at 0
>> pci-rcar-gen2 ee090000.pci: PCI: bus0 revision 11
>> PCI host bridge to bus 0000:00
>> pci_bus 0000:00: root bus resource [io  0xee080000-0xee0810ff]
>> pci_bus 0000:00: root bus resource [mem 0xee080000-0xee0810ff]
>> pci_bus 0000:00: No busn resource found for root bus, will use [bus 00-ff]
>> pci_bus 0000:00: scanning bus
>> pci 0000:00:00.0: [1033:0000] type 00 class 0x060000
>> pci 0000:00:00.0: calling quirk_mmio_always_on+0x0/0x1c
>> pci 0000:00:00.0: reg 0x10: [mem 0xee090800-0xee090bff]
>> pci 0000:00:00.0: reg 0x14: [mem 0x40000000-0x7fffffff pref]
>> pci 0000:00:00.0: calling pci_fixup_ide_bases+0x0/0x58
>> pci 0000:00:00.0: dmabounce: registered device
>> pci 0000:00:01.0: [1033:0035] type 00 class 0x0c0310
>> pci 0000:00:01.0: reg 0x10: [mem 0x00000000-0x00000fff]
>> pci 0000:00:01.0: calling pci_fixup_ide_bases+0x0/0x58
>> pci 0000:00:01.0: supports D1 D2
>> pci 0000:00:01.0: PME# supported from D0 D1 D2 D3hot
>> pci 0000:00:01.0: PME# disabled
>> pci 0000:00:01.0: dmabounce: registered device
>> pci 0000:00:02.0: [1033:00e0] type 00 class 0x0c0320
>> pci 0000:00:02.0: reg 0x10: [mem 0x00000000-0x000000ff]
>> pci 0000:00:02.0: calling pci_fixup_ide_bases+0x0/0x58
>> pci 0000:00:02.0: supports D1 D2
>> pci 0000:00:02.0: PME# supported from D0 D1 D2 D3hot
>> pci 0000:00:02.0: PME# disabled
>> pci 0000:00:02.0: dmabounce: registered device
>> pci_bus 0000:00: fixups for bus
>> PCI: bus0: Fast back to back transfers disabled
>> pci_bus 0000:00: bus scan returning with max\0
>> pci_bus 0000:00: busn_res: [bus 00-ff] end is updated to 00
>> pci-rcar-gen2 ee0b0000.pci: PCI: bus1 revision 11
>> PCI host bridge to bus 0000:01
>> pci_bus 0000:01: root bus resource [io  0xee0a0000-0xee0a10ff]
>> pci_bus 0000:01: root bus resource [mem 0xee0a0000-0xee0a10ff]
>> pci_bus 0000:01: No busn resource found for root bus, will use [bus 01-ff]
>> pci_bus 0000:01: scanning bus
>> pci 0000:01:00.0: [1033:0000] type 00 class 0x060000
>> pci 0000:01:00.0: calling quirk_mmio_always_on+0x0/0x1c
>> pci 0000:01:00.0: reg 0x10: [mem 0xee0b0800-0xee0b0bff]
>> pci 0000:01:00.0: reg 0x14: [mem 0x40000000-0x7fffffff pref]
>> pci 0000:01:00.0: calling pci_fixup_ide_bases+0x0/0x58
>> pci 0000:01:00.0: dmabounce: registered device
>> pci 0000:01:01.0: [1033:0035] type 00 class 0x0c0310
>> pci 0000:01:01.0: reg 0x10: [mem 0x00000000-0x00000fff]
>> pci 0000:01:01.0: calling pci_fixup_ide_bases+0x0/0x58
>> pci 0000:01:01.0: supports D1 D2
>> pci 0000:01:01.0: PME# supported from D0 D1 D2 D3hot
>> pci 0000:01:01.0: PME# disabled
>> pci 0000:01:01.0: dmabounce: registered device
>> pci 0000:01:02.0: [1033:00e0] type 00 class 0x0c0320
>> pci 0000:01:02.0: reg 0x10: [mem 0x00000000-0x000000ff]
>> pci 0000:01:02.0: calling pci_fixup_ide_bases+0x0/0x58
>> pci 0000:01:02.0: supports D1 D2
>> pci 0000:01:02.0: PME# supported from D0 D1 D2 D3hot
>> pci 0000:01:02.0: PME# disabled
>> pci 0000:01:02.0: dmabounce: registered device
>> pci_bus 0000:01: fixups for bus
>> PCI: bus1: Fast back to back transfers disabled
>> pci_bus 0000:01: bus scan returning with max\x01
>> pci_bus 0000:01: busn_res: [bus 01-ff] end is updated to 01
>> pci-rcar-gen2 ee0d0000.pci: PCI: bus2 revision 11
>> PCI host bridge to bus 0000:02
>> pci_bus 0000:02: root bus resource [io  0xee0c0000-0xee0c10ff]
>> pci_bus 0000:02: root bus resource [mem 0xee0c0000-0xee0c10ff]
>> pci_bus 0000:02: No busn resource found for root bus, will use [bus 02-ff]
>> pci_bus 0000:02: scanning bus
>> pci 0000:02:00.0: [1033:0000] type 00 class 0x060000
>> pci 0000:02:00.0: calling quirk_mmio_always_on+0x0/0x1c
>> pci 0000:02:00.0: reg 0x10: [mem 0xee0d0800-0xee0d0bff]
>> pci 0000:02:00.0: reg 0x14: [mem 0x40000000-0x7fffffff pref]
>> pci 0000:02:00.0: calling pci_fixup_ide_bases+0x0/0x58
>> pci 0000:02:00.0: dmabounce: registered device
>> pci 0000:02:01.0: [1033:0035] type 00 class 0x0c0310
>> pci 0000:02:01.0: reg 0x10: [mem 0x00000000-0x00000fff]
>> pci 0000:02:01.0: calling pci_fixup_ide_bases+0x0/0x58
>> pci 0000:02:01.0: supports D1 D2
>> pci 0000:02:01.0: PME# supported from D0 D1 D2 D3hot
>> pci 0000:02:01.0: PME# disabled
>> pci 0000:02:01.0: dmabounce: registered device
>> pci 0000:02:02.0: [1033:00e0] type 00 class 0x0c0320
>> pci 0000:02:02.0: reg 0x10: [mem 0x00000000-0x000000ff]
>> pci 0000:02:02.0: calling pci_fixup_ide_bases+0x0/0x58
>> pci 0000:02:02.0: supports D1 D2
>> pci 0000:02:02.0: PME# supported from D0 D1 D2 D3hot
>> pci 0000:02:02.0: PME# disabled
>> pci 0000:02:02.0: dmabounce: registered device
>> pci_bus 0000:02: fixups for bus
>> PCI: bus2: Fast back to back transfers disabled
>> pci_bus 0000:02: bus scan returning with max\x02
>> pci_bus 0000:02: busn_res: [bus 02-ff] end is updated to 02
>> pci 0000:00:00.0: fixup irq: got 140
>> pci 0000:00:00.0: assigning IRQ 140
>> pci 0000:00:01.0: fixup irq: got 140
>> pci 0000:00:01.0: assigning IRQ 140
>> pci 0000:00:02.0: fixup irq: got 140
>> pci 0000:00:02.0: assigning IRQ 140
>> pci 0000:01:00.0: fixup irq: got 144
>> pci 0000:01:00.0: assigning IRQ 144
>> pci 0000:01:01.0: fixup irq: got 144
>> pci 0000:01:01.0: assigning IRQ 144
>> pci 0000:01:02.0: fixup irq: got 144
>> pci 0000:01:02.0: assigning IRQ 144
>> pci 0000:02:00.0: fixup irq: got 145
>> pci 0000:02:00.0: assigning IRQ 145
>> pci 0000:02:01.0: fixup irq: got 145
>> pci 0000:02:01.0: assigning IRQ 145
>> pci 0000:02:02.0: fixup irq: got 145
>> pci 0000:02:02.0: assigning IRQ 145
>> pci 0000:02:01.0: BAR 0: assigned [mem 0xee0c0000-0xee0c0fff]
>> pci 0000:02:01.0: BAR 0: set to [mem 0xee0c0000-0xee0c0fff] (PCI address [0xee0c0000-0xee0c0fff])
>> pci 0000:02:02.0: BAR 0: assigned [mem 0xee0c1000-0xee0c10ff]
>> pci 0000:02:02.0: BAR 0: set to [mem 0xee0c1000-0xee0c10ff] (PCI address [0xee0c1000-0xee0c10ff])
>> pci 0000:01:01.0: BAR 0: assigned [mem 0xee0a0000-0xee0a0fff]
>> pci 0000:01:01.0: BAR 0: set to [mem 0xee0a0000-0xee0a0fff] (PCI address [0xee0a0000-0xee0a0fff])
>> pci 0000:01:02.0: BAR 0: assigned [mem 0xee0a1000-0xee0a10ff]
>> pci 0000:01:02.0: BAR 0: set to [mem 0xee0a1000-0xee0a10ff] (PCI address [0xee0a1000-0xee0a10ff])
>> pci 0000:00:01.0: BAR 0: assigned [mem 0xee080000-0xee080fff]
>> pci 0000:00:01.0: BAR 0: set to [mem 0xee080000-0xee080fff] (PCI address [0xee080000-0xee080fff])
>> pci 0000:00:02.0: BAR 0: assigned [mem 0xee081000-0xee0810ff]
>> pci 0000:00:02.0: BAR 0: set to [mem 0xee081000-0xee0810ff] (PCI address [0xee081000-0xee0810ff])
>> fixed-3.3V: 3300 mV
>> vgaarb: loaded
>> SCSI subsystem initialized
>> usbcore: registered new interface driver usbfs
>> usbcore: registered new interface driver hub
>> usbcore: registered new device driver usb
>> media: Linux media interface: v0.10
>> Linux video capture interface: v2.00
>> sh_cmt sh_cmt.0: used for clock events
>> Switched to clocksource arch_sys_counter
>> i2c-rcar e6508000.i2c: probed
>> i2c-rcar e6518000.i2c: probed
>> i2c-rcar e6530000.i2c: probed
>> i2c-rcar e6540000.i2c: probed
>> NET: Registered protocol family 2
>> TCP established hash table entries: 8192 (order: 3, 32768 bytes)
>> TCP bind hash table entries: 8192 (order: 4, 65536 bytes)
>> TCP: Hash tables configured (established 8192 bind 8192)
>> TCP: reno registered
>> UDP hash table entries: 512 (order: 2, 16384 bytes)
>> UDP-Lite hash table entries: 512 (order: 2, 16384 bytes)
>> NET: Registered protocol family 1
>> RPC: Registered named UNIX socket transport module.
>> RPC: Registered udp transport module.
>> RPC: Registered tcp transport module.
>> RPC: Registered tcp NFSv4.1 backchannel transport module.
>> pci 0000:00:01.0: calling quirk_usb_early_handoff+0x0/0x7a8
>> PCI: enabling device 0000:00:01.0 (0140 -> 0142)
>> pci 0000:00:02.0: calling quirk_usb_early_handoff+0x0/0x7a8
>> PCI: enabling device 0000:00:02.0 (0140 -> 0142)
>> pci 0000:01:01.0: calling quirk_usb_early_handoff+0x0/0x7a8
>> PCI: enabling device 0000:01:01.0 (0140 -> 0142)
>> pci 0000:01:02.0: calling quirk_usb_early_handoff+0x0/0x7a8
>> PCI: enabling device 0000:01:02.0 (0140 -> 0142)
>> pci 0000:02:01.0: calling quirk_usb_early_handoff+0x0/0x7a8
>> PCI: enabling device 0000:02:01.0 (0140 -> 0142)
>> pci 0000:02:02.0: calling quirk_usb_early_handoff+0x0/0x7a8
>> PCI: enabling device 0000:02:02.0 (0140 -> 0142)
>> PCI: CLS 64 bytes, default 64
>> NFS: Registering the id_resolver key type
>> Key type id_resolver registered
>> Key type id_legacy registered
>> nfs4filelayout_init: NFSv4 File Layout Driver Registering...
>> msgmni has been set to 1494
>> io scheduler noop registered (default)
>> gpio_rcar e6050000.gpio: driving 32 GPIOs
>> gpio_rcar e6051000.gpio: driving 32 GPIOs
>> gpio_rcar e6052000.gpio: driving 32 GPIOs
>> gpio_rcar e6053000.gpio: driving 32 GPIOs
>> gpio_rcar e6054000.gpio: driving 32 GPIOs
>> gpio_rcar e6055000.gpio: driving 32 GPIOs
>> SuperH (H)SCI(F) driver initialized
>> sh-sci.0: ttySC0 at MMIO 0xe6c40000 (irq = 176, base_baud = 0) is a scifa
>> sh-sci.1: ttySC1 at MMIO 0xe6c50000 (irq = 177, base_baud = 0) is a scifa
>> sh-sci.2: ttySC2 at MMIO 0xe6c20000 (irq = 180, base_baud = 0) is a scifb
>> sh-sci.3: ttySC3 at MMIO 0xe6c30000 (irq = 181, base_baud = 0) is a scifb
>> sh-sci.4: ttySC4 at MMIO 0xe6ce0000 (irq = 182, base_baud = 0) is a scifb
>> sh-sci.5: ttySC5 at MMIO 0xe6c60000 (irq = 183, base_baud = 0) is a scifa
>> sh-sci.6: ttySC6 at MMIO 0xe6e60000 (irq = 184, base_baud = 0) is a scif
>> console [ttySC6] enabled
>> sh-sci.7: ttySC7 at MMIO 0xe6e68000 (irq = 185, base_baud = 0) is a scif
>> sh-sci.8: ttySC8 at MMIO 0xe62c0000 (irq = 186, base_baud = 0) is a hscif
>> sh-sci.9: ttySC9 at MMIO 0xe62c8000 (irq = 187, base_baud = 0) is a hscif
>> [drm] Initialized drm 1.1.0 20060810
>> rcar-du feb00000.rcar-du: counting nodes...
>> rcar-du feb00000.rcar-du: looking for output0
>> adv7511 2-0039: got to 810
>> adv7511 2-0039: got to 868
>> adv7511 2-0039: got to 883
>> adv7511 2-0039: did not get hpd event
>> rcar-du feb00000.rcar-du: setting hdmi slave configuration
>> rcar-du feb00000.rcar-du: looking for output1
>> rcar-du feb00000.rcar-du: no output selected
>> Console: switching to colour frame buffer device 240x67
>> rcar-du feb00000.rcar-du: fb0:  frame buffer device
>> rcar-du feb00000.rcar-du: registered panic notifier
>> [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
>> [drm] No driver support for vblank timestamp query.
>> [drm] Initialized rcar-du 1.0.0 20130110 on minor 0
>> sh-pfc e6060000.pfc: DT node must contain at least a function or config
>> sh-pfc e6060000.pfc: no mapping found in node /pfc@e6060000/eth
>> sh-eth ee700000.sh_net: match c0564218 (renesas,r8a7790-ether)
>> sh-eth ee700000.sh_net: new platform data ed35d890
>> sh-pfc e6060000.pfc: DT node must contain at least a function or config
>> sh-pfc e6060000.pfc: no mapping found in node /pfc@e6060000/eth
>> sh-eth ee700000.sh_net: set default pinctrl
>> lager_ksz8041_fixup: called for phy ed2ab400 (drv   (null))
>> lager_ksz8041_fixup: phy id 0000,0000
>> libphy: sh_mii: probed
>> Base address at 0xee700000, 2e:09:0a:00:3d:e0, IRQ 194.
>> ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
>> ehci-pci: EHCI PCI platform driver
>> ehci-pci 0000:00:02.0: enabling bus mastering
>> ehci-pci 0000:00:02.0: EHCI Host Controller
>> ehci-pci 0000:00:02.0: new USB bus registered, assigned bus number 1
>> ehci-pci 0000:00:02.0: enabling Mem-Wr-Inval
>> ehci-pci 0000:00:02.0: irq 140, io mem 0xee081000
>> ehci-pci 0000:00:02.0: USB 2.0 started, EHCI 1.00
>> usb usb1: New USB device found, idVendor\x1d6b, idProduct\002
>> usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
>> usb usb1: Product: EHCI Host Controller
>> usb usb1: Manufacturer: Linux 3.13.0-rc7-bjd1-00072-g3785df4-dirty ehci_hcd
>> usb usb1: SerialNumber: 0000:00:02.0
>> hub 1-0:1.0: USB hub found
>> hub 1-0:1.0: 1 port detected
>> ehci-pci 0000:01:02.0: enabling bus mastering
>> ehci-pci 0000:01:02.0: EHCI Host Controller
>> ehci-pci 0000:01:02.0: new USB bus registered, assigned bus number 2
>> ehci-pci 0000:01:02.0: enabling Mem-Wr-Inval
>> ehci-pci 0000:01:02.0: irq 144, io mem 0xee0a1000
>> ehci-pci 0000:01:02.0: USB 2.0 started, EHCI 1.00
>> usb usb2: New USB device found, idVendor\x1d6b, idProduct\002
>> usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
>> usb usb2: Product: EHCI Host Controller
>> usb usb2: Manufacturer: Linux 3.13.0-rc7-bjd1-00072-g3785df4-dirty ehci_hcd
>> usb usb2: SerialNumber: 0000:01:02.0
>> hub 2-0:1.0: USB hub found
>> hub 2-0:1.0: 1 port detected
>> ehci-pci 0000:02:02.0: enabling bus mastering
>> ehci-pci 0000:02:02.0: EHCI Host Controller
>> ehci-pci 0000:02:02.0: new USB bus registered, assigned bus number 3
>> ehci-pci 0000:02:02.0: enabling Mem-Wr-Inval
>> ehci-pci 0000:02:02.0: irq 145, io mem 0xee0c1000
>> ehci-pci 0000:02:02.0: USB 2.0 started, EHCI 1.00
>> usb usb3: New USB device found, idVendor\x1d6b, idProduct\002
>> usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
>> usb usb3: Product: EHCI Host Controller
>> usb usb3: Manufacturer: Linux 3.13.0-rc7-bjd1-00072-g3785df4-dirty ehci_hcd
>> usb usb3: SerialNumber: 0000:02:02.0
>> hub 3-0:1.0: USB hub found
>> hub 3-0:1.0: 1 port detected
>> ehci-platform: EHCI generic platform driver
>> ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
>> ohci-pci: OHCI PCI platform driver
>> ohci-pci 0000:00:01.0: enabling bus mastering
>> ohci-pci 0000:00:01.0: OHCI PCI host controller
>> ohci-pci 0000:00:01.0: new USB bus registered, assigned bus number 4
>> ohci-pci 0000:00:01.0: read 00000000 from 0004
>> ohci-pci 0000:00:01.0: write 80000000 to 0014
>> ohci-pci 0000:00:01.0: read 00000000 from 0004
>> ohci-pci 0000:00:01.0: read 0f000901 from 0048
>> ohci-pci 0000:00:01.0: irq 140, io mem 0xee080000
>> ohci-pci 0000:00:01.0: read 00002edf from 0034
>> ohci-pci 0000:00:01.0: write 00000200 to 0004
>> ohci-pci 0000:00:01.0: read 00000000 from 0004
>> ohci-pci 0000:00:01.0: write 00000001 to 0008
>> ohci-pci 0000:00:01.0: read 00000000 from 0008
>> ohci-pci 0000:00:01.0: write 00000000 to 0020
>> ohci-pci 0000:00:01.0: write 00000000 to 0028
>> ohci-pci 0000:00:01.0: write 6d803000 to 0018
>> ohci-pci 0000:00:01.0: read 00002edf from 0034
>> ohci-pci 0000:00:01.0: write a7782edf to 0034
>> ohci-pci 0000:00:01.0: write 00002a2f to 0040
>> ohci-pci 0000:00:01.0: read 00002edf from 0034
>> ohci-pci 0000:00:01.0: write 00000001 to 0008
>> ohci-pci 0000:00:01.0: read 00000000 from 0008
>> ohci-pci 0000:00:01.0: write 00000200 to 0004
>> ohci-pci 0000:00:01.0: read 00000000 from 0004
>> ohci-pci 0000:00:01.0: write 00000000 to 0020
>> ohci-pci 0000:00:01.0: write 00000000 to 0028
>> ohci-pci 0000:00:01.0: write 6d803000 to 0018
>> ohci-pci 0000:00:01.0: read 00002edf from 0034
>> ohci-pci 0000:00:01.0: write a7782edf to 0034
>> ohci-pci 0000:00:01.0: write 00002a2f to 0040
>> ohci-pci 0000:00:01.0: read 00002edf from 0034
>> ohci-pci 0000:00:01.0: read 00002edf from 0034
>> ohci-pci 0000:00:01.0: read 00000000 from 0040
>> ohci-pci 0000:00:01.0: init err (00002edf 0000)
>> ohci-pci 0000:00:01.0: can't start
>> ohci-pci 0000:00:01.0: write 80000000 to 0014
>> ohci-pci 0000:00:01.0: read 00000000 from 0004
>> ohci-pci 0000:00:01.0: write 00000000 to 0004
>> ohci-pci 0000:00:01.0: startup error -75
>> ohci-pci 0000:00:01.0: USB bus 4 deregistered
>> ohci-pci 0000:00:01.0: init 0000:00:01.0 fail, -75
>> ohci-pci: probe of 0000:00:01.0 failed with error -75
>> ohci-pci 0000:01:01.0: enabling bus mastering
>> ohci-pci 0000:01:01.0: OHCI PCI host controller
>> ohci-pci 0000:01:01.0: new USB bus registered, assigned bus number 4
>> ohci-pci 0000:01:01.0: read 00000000 from 0004
>> ohci-pci 0000:01:01.0: write 80000000 to 0014
>> ohci-pci 0000:01:01.0: read 00000000 from 0004
>> ohci-pci 0000:01:01.0: read 0f000901 from 0048
>> ohci-pci 0000:01:01.0: irq 144, io mem 0xee0a0000
>> ohci-pci 0000:01:01.0: read 00002edf from 0034
>> ohci-pci 0000:01:01.0: write 00000200 to 0004
>> ohci-pci 0000:01:01.0: read 00000200 from 0004
>> ohci-pci 0000:01:01.0: write 00000001 to 0008
>> ohci-pci 0000:01:01.0: read 00000000 from 0008
>> ohci-pci 0000:01:01.0: write 00000000 to 0020
>> ohci-pci 0000:01:01.0: write 00000000 to 0028
>> ohci-pci 0000:01:01.0: write 6d803000 to 0018
>> ohci-pci 0000:01:01.0: read 00002edf from 0034
>> ohci-pci 0000:01:01.0: write a7782edf to 0034
>> ohci-pci 0000:01:01.0: write 00002a2f to 0040
>> ohci-pci 0000:01:01.0: read a7782edf from 0034
>> ohci-pci 0000:01:01.0: read 00002a2f from 0040
>> ohci-pci 0000:01:01.0: write 00000283 to 0004
>> ohci-pci 0000:01:01.0: write 00008000 to 0050
>> ohci-pci 0000:01:01.0: write ffffffff to 000c
>> ohci-pci 0000:01:01.0: write 8000005a to 0010
>> ohci-pci 0000:01:01.0: read 0f000901 from 0048
>> ohci-pci 0000:01:01.0: write 0f000201 to 0048
>> ohci-pci 0000:01:01.0: write 00010000 to 0050
>> ohci-pci 0000:01:01.0: write 00000000 to 004c
>> ohci-pci 0000:01:01.0: read 00000283 from 0004
>> usb usb4: New USB device found, idVendor\x1d6b, idProduct\001
>> usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
>> usb usb4: Product: OHCI PCI host controller
>> usb usb4: Manufacturer: Linux 3.13.0-rc7-bjd1-00072-g3785df4-dirty ohci_hcd
>> usb usb4: SerialNumber: 0000:01:01.0
>> hub 4-0:1.0: USB hub found
>> ohci-pci 0000:01:01.0: read 0f000201 from 0048
>> ohci-pci 0000:01:01.0: read 00000000 from 004c
>> hub 4-0:1.0: 1 port detected
>> ohci-pci 0000:01:01.0: read 00008000 from 0050
>> ohci-pci 0000:01:01.0: write 00000100 to 0054
>> ohci-pci 0000:01:01.0: read 00008000 from 0050
>> ohci-pci 0000:01:01.0: write 00000040 to 000c
>> ohci-pci 0000:01:01.0: read 00000004 from 000c
>> ohci-pci 0000:01:01.0: read 00000100 from 0054
>> ohci-pci 0000:01:01.0: read 8000005a from 0010
>> ohci-pci 0000:02:01.0: enabling bus mastering
>> ohci-pci 0000:02:01.0: OHCI PCI host controller
>> ohci-pci 0000:02:01.0: new USB bus registered, assigned bus number 5
>> ohci-pci 0000:02:01.0: read 00000000 from 0004
>> ohci-pci 0000:02:01.0: write 80000000 to 0014
>> ohci-pci 0000:02:01.0: read 00000000 from 0004
>> ohci-pci 0000:02:01.0: read 0f000901 from 0048
>> ohci-pci 0000:02:01.0: irq 145, io mem 0xee0c0000
>> ohci-pci 0000:02:01.0: read 00002edf from 0034
>> ohci-pci 0000:02:01.0: write 00000200 to 0004
>> ohci-pci 0000:02:01.0: read 00000200 from 0004
>> ohci-pci 0000:01:01.0: read 00000100 from 0054
>> ohci-pci 0000:01:01.0: read 00000283 from 0004
>> ohci-pci 0000:01:01.0: write 000006c3 to 0004
>> ohci-pci 0000:01:01.0: read 000006c3 from 0004
>> ohci-pci 0000:01:01.0: read 00008000 from 0050
>> ohci-pci 0000:02:01.0: write 00000001 to 0008
>> ohci-pci 0000:02:01.0: read 00000000 from 0008
>> ohci-pci 0000:02:01.0: write 00000000 to 0020
>> ohci-pci 0000:02:01.0: write 00000000 to 0028
>> ohci-pci 0000:02:01.0: write 6d804000 to 0018
>> ohci-pci 0000:02:01.0: read 00002edf from 0034
>> ohci-pci 0000:02:01.0: write a7782edf to 0034
>> ohci-pci 0000:02:01.0: write 00002a2f to 0040
>> ohci-pci 0000:02:01.0: read a7782edf from 0034
>> ohci-pci 0000:02:01.0: read 00002a2f from 0040
>> ohci-pci 0000:02:01.0: write 00000283 to 0004
>> ohci-pci 0000:02:01.0: write 00008000 to 0050
>> ohci-pci 0000:02:01.0: write ffffffff to 000c
>> ohci-pci 0000:02:01.0: write 8000005a to 0010
>> ohci-pci 0000:02:01.0: read 0f000901 from 0048
>> ohci-pci 0000:02:01.0: write 0f000201 to 0048
>> ohci-pci 0000:02:01.0: write 00010000 to 0050
>> ohci-pci 0000:02:01.0: write 00000000 to 004c
>> ohci-pci 0000:02:01.0: read 00000283 from 0004
>> usb usb5: New USB device found, idVendor\x1d6b, idProduct\001
>> usb usb5: New USB device strings: Mfr=3, Product=2, SerialNumber=1
>> usb usb5: Product: OHCI PCI host controller
>> usb usb5: Manufacturer: Linux 3.13.0-rc7-bjd1-00072-g3785df4-dirty ohci_hcd
>> usb usb5: SerialNumber: 0000:02:01.0
>> hub 5-0:1.0: USB hub found
>> ohci-pci 0000:02:01.0: read 0f000201 from 0048
>> ohci-pci 0000:02:01.0: read 00000000 from 004c
>> hub 5-0:1.0: 1 port detected
>> ohci-pci 0000:02:01.0: read 00008000 from 0050
>> ohci-pci 0000:02:01.0: write 00000100 to 0054
>> ohci-pci 0000:02:01.0: read 00008000 from 0050
>> ohci-pci 0000:02:01.0: write 00000040 to 000c
>> ohci-pci 0000:02:01.0: read 00000004 from 000c
>> ohci-pci 0000:02:01.0: read 00000100 from 0054
>> ohci-pci 0000:02:01.0: read 8000005a from 0010
>> ohci-platform: OHCI generic platform driver
>> usbcore: registered new interface driver cdc_acm
>> cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
>> usbcore: registered new interface driver usb-storage
>> usbcore: registered new interface driver usbserial
>> usbcore: registered new interface driver usbserial_generic
>> usbserial: USB Serial support registered for generic
>> mousedev: PS/2 mouse device common for all mice
>> i2c /dev entries driver
>> rcar_thermal e61f0000.thermal: 1 sensor probed
>> sh_mmcif ee220000.mmc: dummy supplies not allowed
>> of_dma_request_slave_channel: dma-names property of node '/mmc@ee220000' missing or empty
>> sh_mmcif ee220000.mmc: driver version 2010-04-28
>> mmc0: BKOPS_EN bit is not set
>> mmc0: new high speed MMC card at address 0001
>> ohci-pci 0000:02:01.0: read 00000100 from 0054
>> ohci-pci 0000:01:01.0: write 00000040 to 000c
>> ohci-pci 0000:01:01.0: read 00000004 from 000c
>> ohci-pci 0000:01:01.0: read 00000100 from 0054
>> ohci-pci 0000:01:01.0: read 8000005a from 0010
>> ohci-pci 0000:02:01.0: read 00000283 from 0004
>> ohci-pci 0000:02:01.0: write 000006c3 to 0004
>> ohci-pci 0000:02:01.0: read 000006c3 from 0004
>> ohci-pci 0000:02:01.0: read 00008000 from 0050
>> isa bounce pool size: 16 pages
>> mmcblk0: mmc0:0001 MMC08G 7.32 GiB
>> mmcblk0boot0: mmc0:0001 MMC08G partition 1 2.00 MiB
>> mmcblk0boot1: mmc0:0001 MMC08G partition 2 2.00 MiB
>> usbcore: registered new interface driver usbhid
>> usbhid: USB HID core driver
>>  mmcblk0: unknown partition table
>>  mmcblk0boot1: unknown partition table
>>  mmcblk0boot0: unknown partition table
>> ohci-pci 0000:02:01.0: write 00000040 to 000c
>> ohci-pci 0000:02:01.0: read 00000004 from 000c
>> ohci-pci 0000:02:01.0: read 00000100 from 0054
>> ohci-pci 0000:02:01.0: read 8000005a from 0010
>> TCP: cubic registered
>> NET: Registered protocol family 17
>> NET: Registered protocol family 15
>> Key type dns_resolver registered
>> /home/ben/ct178/renesas/drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
>> lager_ksz8041_fixup: called for phy ed2ab400 (drv c0562fac)
>> lager_ksz8041_fixup: phy id 0022,1537
>> net eth0: attached phy 1 to driver Generic PHY
>> Sending DHCP requests .
>
>
>
>

Re: [PATCH RFC 0/2] ARM: shmobile: lager: Enable DMA bounce for PCI

[Ben Dooks]

On 29/01/14 16:37, Valentine wrote:
> On 01/29/2014 08:03 PM, Ben Dooks wrote:
>> On 29/01/14 12:47, Valentine wrote:
>>> On 01/29/2014 04:45 PM, Ben Dooks wrote:
>>>> On 29/01/14 11:15, Valentine wrote:
>>>>> On 01/29/2014 12:03 PM, Ben Dooks wrote:
>>>>>> On 29/01/14 06:45, Simon Horman wrote:
>>>>>>> On Tue, Jan 28, 2014 at 10:53:31PM +0400, Valentine Barshak wrote:
>>>>>>>> This enables DMA bounce for PCI since the controller does
>>>>>>>> not support more than 2G PCI-AHB memory window.
>>>>>>>> The problems with DMA transfers can be observed when
>>>>>>>> setting 2G/2G user/kernel memory split model
>>>>>>>> (CONFIG_VMSPLIT_2G=y)
>>>>>>>> These patches help to avoid it.
>>>>>>>
>>>>>>> Are these patches compatible with other user/kernel splits?
>>>>>>
>>>>>> PS, the bridge is only actually capable of seeing 1GiB of
>>>>>> RAM due to alignment issues in the window. You can have either
>>>>>> 0x4..0x8 or 0x8..0xc but not /both/. If you open the window to
>>>>>> 2GiB then you can see either 0x0..0x8 or 0x8..0xF range.
>>>>>>
>>>>>
>>>>> I don't think this is relater to the user/kernel space memory split.
>>>>>
>>>>> Currently the R-Car Gen2 PCI driver uses 0x40000000 - 0x7fffffff
>>>>> PCI-AHB region. We can set it to 0x00000000 - 0x7fffffff,
>>>>> but there's no RAM below 0x40000000 so no DMA access to that area is
>>>>> actually legal from the PCI USB host driver.
>>>>> So the change wouldn't give us much.
>>>>
>>>> Well, there's IO areas but probably not wanting to DMA to them anyway.
>>>>
>>>>> The 31-bit DMA mask takes care of forbidding any DMA transfers
>>>>> to the area above 0x7fffffff.
>>>>
>>>> I will add this to our current patch series and see if it helps.
>>>
>>> Helps with what?
>>>
>>> I don't see any issues with the current patches.
>>
>> We're clearly not testing the same configurations, as all your patches
>> either are not DT enabled or are for the non-multiplatform kernel
>> builds. I've tried porting your DMA bounce changes to the
>> multiplatform board-lager-reference.c file but that has not fixed
>> the issue for me.
>
> Yes, my patches are not for the DT support. They have been around for quite
> a while and my goal is to have them applied first and add DT later.
>
> You've probably done something wrong while trying to support multiplatform.
> It looks like you're either missing the patches mentioned here:
> http://marc.info/?l=linux-sh&m\x139060253506760&w=2
> or you're not binding the PCI devices to the USB phy.
> Do you have USB R-Car Gen2 phy driver enabled?
> I don't see ehci/ochi probe being deferred until USB phy is ready.
> That's why you see this error.
>
> Please, discard your own follow the steps from the link above.
> I think you mentioned lately that you had tried the non-multiplatform
> version
> and it had not worked for you. Did you actually try it?
>
> Thanks,
> Val.

I have a local patch that forces the PHY on as soon as it gets
probed by the device tree because I have not had the time to sort
out the link between the DT and the PCI.

> $ grep GEN2 out/test/.config
> CONFIG_PCI_RCAR_GEN2=y
> # CONFIG_PCI_RCAR_GEN2_ERRIRQ is not set
> CONFIG_USB_RCAR_GEN2_PHY=y

I /will/ go and check the driver is actually being probed in
case there is an issue there.

-- 
Ben Dooks				http://www.codethink.co.uk/
Senior Engineer				Codethink - Providing Genius

Re: [PATCH RFC 0/2] ARM: shmobile: lager: Enable DMA bounce for PCI

[Valentine]

On 01/29/2014 08:57 PM, Ben Dooks wrote:
> On 29/01/14 16:37, Valentine wrote:
>> On 01/29/2014 08:03 PM, Ben Dooks wrote:
>>> On 29/01/14 12:47, Valentine wrote:
>>>> On 01/29/2014 04:45 PM, Ben Dooks wrote:
>>>>> On 29/01/14 11:15, Valentine wrote:
>>>>>> On 01/29/2014 12:03 PM, Ben Dooks wrote:
>>>>>>> On 29/01/14 06:45, Simon Horman wrote:
>>>>>>>> On Tue, Jan 28, 2014 at 10:53:31PM +0400, Valentine Barshak wrote:
>>>>>>>>> This enables DMA bounce for PCI since the controller does
>>>>>>>>> not support more than 2G PCI-AHB memory window.
>>>>>>>>> The problems with DMA transfers can be observed when
>>>>>>>>> setting 2G/2G user/kernel memory split model
>>>>>>>>> (CONFIG_VMSPLIT_2G=y)
>>>>>>>>> These patches help to avoid it.
>>>>>>>>
>>>>>>>> Are these patches compatible with other user/kernel splits?
>>>>>>>
>>>>>>> PS, the bridge is only actually capable of seeing 1GiB of
>>>>>>> RAM due to alignment issues in the window. You can have either
>>>>>>> 0x4..0x8 or 0x8..0xc but not /both/. If you open the window to
>>>>>>> 2GiB then you can see either 0x0..0x8 or 0x8..0xF range.
>>>>>>>
>>>>>>
>>>>>> I don't think this is relater to the user/kernel space memory split.
>>>>>>
>>>>>> Currently the R-Car Gen2 PCI driver uses 0x40000000 - 0x7fffffff
>>>>>> PCI-AHB region. We can set it to 0x00000000 - 0x7fffffff,
>>>>>> but there's no RAM below 0x40000000 so no DMA access to that area is
>>>>>> actually legal from the PCI USB host driver.
>>>>>> So the change wouldn't give us much.
>>>>>
>>>>> Well, there's IO areas but probably not wanting to DMA to them anyway.
>>>>>
>>>>>> The 31-bit DMA mask takes care of forbidding any DMA transfers
>>>>>> to the area above 0x7fffffff.
>>>>>
>>>>> I will add this to our current patch series and see if it helps.
>>>>
>>>> Helps with what?
>>>>
>>>> I don't see any issues with the current patches.
>>>
>>> We're clearly not testing the same configurations, as all your patches
>>> either are not DT enabled or are for the non-multiplatform kernel
>>> builds. I've tried porting your DMA bounce changes to the
>>> multiplatform board-lager-reference.c file but that has not fixed
>>> the issue for me.
>>
>> Yes, my patches are not for the DT support. They have been around for quite
>> a while and my goal is to have them applied first and add DT later.
>>
>> You've probably done something wrong while trying to support multiplatform.
>> It looks like you're either missing the patches mentioned here:
>> http://marc.info/?l=linux-sh&m\x139060253506760&w=2
>> or you're not binding the PCI devices to the USB phy.
>> Do you have USB R-Car Gen2 phy driver enabled?
>> I don't see ehci/ochi probe being deferred until USB phy is ready.
>> That's why you see this error.
>>
>> Please, discard your own follow the steps from the link above.
>> I think you mentioned lately that you had tried the non-multiplatform
>> version
>> and it had not worked for you. Did you actually try it?
>>
>> Thanks,
>> Val.
>
> I have a local patch that forces the PHY on as soon as it gets
> probed by the device tree because I have not had the time to sort
> out the link between the DT and the PCI.

I don't think your approach will work because the USB phy is probed after the PCI host devices.

>
>> $ grep GEN2 out/test/.config
>> CONFIG_PCI_RCAR_GEN2=y
>> # CONFIG_PCI_RCAR_GEN2_ERRIRQ is not set
>> CONFIG_USB_RCAR_GEN2_PHY=y
>
> I /will/ go and check the driver is actually being probed in
> case there is an issue there.
>

Thanks,
Val.