PCI resource allocation

PCI resource allocation

[Michael Thompson]

Hello,

I'm porting linux to a custom 8240 based board. This board has
two PCI buses; bus 0 is a 66MHz bus, and bus 1 is a 33MHz bus, so there
is a PCI-PCI bridge (1011/0023) on bus 0.

On bus 1, there is one ethernet device (1022:2000) and a PCI-ISA
bridge (100b/0021).

There is a problem allocating resources for the ethernet device, and
I'm afraid I'm clueless at the moment. Can anybody give me an idea
what might be going on?

Thanks!

-Michael Thompson
mickey@berkeley.innomedia.com

----

Total memory = 3136MB; using 0kB for hash table (at 00000000)
Linux version 2.4.0-test9 (mickey@richter) (gcc version 2.95.2 19991024 (release/franzo)) #17 Tue Oct 3 23:38:55 PDT 2000
Boot arguments: root=nfs console=ttyS0,9600
On node 0 totalpages: 802816
zone(0): 802816 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: root=nfs console=ttyS0,9600
OpenPIC Version 1.2 (1 CPUs and 24 IRQ sources) at fc040000
OpenPIC timer frequency is not set
time_init: decrementer frequency = 66.000000 MHz
Calibrating delay loop... 439.09 BogoMIPS
Memory: 8864k available (0k kernel code, 0k data, 0k init, 0k highmem)
Dentry-cache hash table entries: 262144 (order: 9, 2097152 bytes)
Buffer-cache hash table entries: 262144 (order: 8, 1048576 bytes)
Page-cache hash table entries: 524288 (order: 9, 2097152 bytes)
Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)
POSIX conformance testing by UNIFIX
PCI: Probing PCI hardware
Scanning bus 00
Found 00:00 [1057/0003] 000600 00
Found 00:80 [11ab/4809] 000200 00
Found 00:88 [1011/0023] 000604 01
Fixups for bus 00
Scanning behind PCI bridge 00:11.0, config 010100, pass 0
Scanning bus 01
Found 01:00 [1022/2000] 000200 00
Found 01:10 [100b/0021] 000601 00
Fixups for bus 01
Bus scan for 01 returning with max=01
Scanning behind PCI bridge 00:11.0, config 010100, pass 1
Bus scan for 00 returning with max=01
PCI: Resource 80100000-80100fff (f=200, d=0, p=0)
PCI: Cannot allocate resource region 1 of device 00:00.0
PCI: Resource 80200000-803fffff (f=200, d=1, p=1)
PCI: Cannot allocate resource region 0 of device 00:10.0
PCI: Resource 00801000-00801003 (f=101, d=1, p=1)
PCI: Resource 00800000-0080001f (f=101, d=1, p=1)
PCI: Cannot allocate resource region 0 of device 01:00.0
PCI: Resource a0100000-a010001f (f=200, d=1, p=1)
  got res[10000000:101fffff] for resource 0
PCI: Failed to allocate resource 0 for PCI device 1022:2000
Linux NET4.0 for Linux 2.4
Based upon Swansea University Computer Society NET3.039


** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

PCI resource allocation

[Jim McCloskey]

I'm running 2.4.9 (patched from 2.4.7). The hardware is this:

Mainboard:      Tyan Trinity K7 S238
CPU:            AMD Athlon K7 750MHz
Memory:         PC-133 128MB
Boot HD:        Seagate 9.1GB LVD
SCSI HBA:	Tekram DC390U2W PCI

I continue to get these warnings at boot-time:

Jul 31 09:14:58 kernel: PCI: Cannot allocate resource region 0 of device 01:00.0
Jul 31 09:14:58 kernel: PCI: Failed to allocate resource 0(d8000000-d8ffffff) for 01:00.0

Device 1 is the video card, which is a Matrox G400 AGP.

lspci reports:

01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400 AGP (rev 04) (prog-if 00 [VGA])
        Subsystem: Matrox Graphics, Inc. Millennium G400 16Mb SGRAM
        Flags: bus master, medium devsel, latency 32, IRQ 15
        Memory at d8000000 (32-bit, prefetchable) [size=16M]
        Memory at d4000000 (32-bit, non-prefetchable) [size=16K]
        Memory at d5000000 (32-bit, non-prefetchable) [size=8M]
        Expansion ROM at <unassigned> [disabled] [size=64K]
        Capabilities: [dc] Power Management version 2
        Capabilities: [f0] AGP version 2.0

The card basically works, but I get problems under applications that
make heavy demands (programs hang or produce seg-faults). I've had the
warnings ever since upgrading from the 2.2.x series to the 2.4.x
series.

I gather from the archives that this is a known problem, and that it
has been discussed quite a bit. Is there a way I can help track down
the problem, or a proposed solution that I could try?

Thanks a lot,

Jim McCloskey

PCI Resource Allocation.

[John Traill]

I'm porting linux to a development platform with its VIA Southbridge connected to the secondary bus of a PCI bridge.

I've made the following quick hacks to get as far as I have but would now like to get some pointers as to the "right way".

1. The 4k IO space window for the bridge setup isn't enough for all the VIA IO memory space so I've bumped this up to 64K.

2. Because the VIA is on the "wrong side of the bridge" the isa_io_base has effectively been changed to 0xfebf0000.
Again I've made a quick hack to my platform setup.c to reflect this and the kernel now Oops's as per the included debug
capture.


If anyone could give me some pointers as to the right way to approach this I would be most obliged ? Is there any way to
   "pin" the VIA to a known address ( 0xfe000000 ) as adding devices onto my primary PCI bus will change the
isa_io_base. Also are there any known issues with PCI-PCI bridging and ppc etc ...


Memory BAT mapping: BAT2=64Mb, BAT3=0Mb, residual: 0Mb
Linux version 2.4.20-pre8 (johnt@sapporo) (gcc version 3.0.4) #24 Mon Dec 9 11:18:22 GMT 2002
Motorola Test Platform
On node 0 totalpages: 16384
zone(0): 16384 pages.
zone(1): 0 pages.
zone(2): 0 pages.
Kernel command line: root=/dev/nfs rw console=ttyS0 ip=dhcp
OpenPIC Version 1.2 (1 CPUs and 8 IRQ sources) at fdfd0000
time_init: decrementer frequency = 24.751442 MHz
Calibrating delay loop... 164.65 BogoMIPS
Memory: 63272k available (1052k kernel code, 340k data, 92k init, 0k highmem)
Dentry cache hash table entries: 8192 (order: 4, 65536 bytes)
Inode cache hash table entries: 4096 (order: 3, 32768 bytes)
Mount-cache hash table entries: 1024 (order: 1, 8192 bytes)
Buffer-cache hash table entries: 4096 (order: 2, 16384 bytes)
Page-cache hash table entries: 16384 (order: 4, 65536 bytes)
POSIX conformance testing by UNIFIX
PCI: Probing PCI hardware
Scanning bus 00
Found 00:00 [1057/0006] 000600 00
PCI:00:00.0 Resource 0 [00000000-ffffffff] is unassigned
PCI:00:00.0 Resource 1 [00000000-00000fff] is unassigned
PCI:00:00.0 Resource 2 [00000000-ffffffff] is unassigned
Found 00:88 [10e3/0513] 000604 01
Fixups for bus 00
Scanning behind PCI bridge 00:11.0, config 010100, pass 0
Scanning bus 01
Found 01:10 [1106/0686] 000601 00
Found 01:11 [1106/0571] 000101 00
Fixup res 0 (101) of dev 01:02.1: bffff8 -> fff8
Fixup res 1 (101) of dev 01:02.1: bffff4 -> fff4
Fixup res 2 (101) of dev 01:02.1: bfffe8 -> ffe8
Fixup res 3 (101) of dev 01:02.1: bfffe4 -> ffe4
Fixup res 4 (101) of dev 01:02.1: bfffd0 -> ffd0
Found 01:12 [1106/3038] 000c03 00
Fixup res 4 (101) of dev 01:02.2: bfffa0 -> ffa0
Found 01:13 [1106/3038] 000c03 00
Fixup res 4 (101) of dev 01:02.3: bfff80 -> ff80
Found 01:14 [1106/3057] 000000 00
Found 01:15 [1106/3058] 000401 00
Fixup res 0 (101) of dev 01:02.5: bffe00 -> fe00
Fixup res 1 (101) of dev 01:02.5: bffdfc -> fdfc
Fixup res 2 (101) of dev 01:02.5: bffdf8 -> fdf8
Found 01:16 [1106/3068] 000780 00
Fixup res 0 (101) of dev 01:02.6: bffc00 -> fc00
Fixups for bus 01
Bus scan for 01 returning with max=01
Scanning behind PCI bridge 00:11.0, config 010100, pass 1
Bus scan for 00 returning with max=01
PCI: bridge rsrc 80000000..fcffffff (200), parent c0124d48
PCI: bridge rsrc 0..ffff (101), parent c0184038
PCI: Cannot allocate resource region 0 of PCI bridge 1
PCI: bridge rsrc bfe00000..bfefffff (200), parent c0184054
PCI: bridge rsrc bfd00000..bfdfffff (1201), parent c0184054
PCI:00:11.0: Resource 0: bffff000-bfffffff (f=200)
PCI:01:02.1: Resource 0: 0000fff8-0000ffff (f=101)
PCI: Cannot allocate resource region 0 of device 01:02.1
PCI:01:02.1: Resource 1: 0000fff4-0000fff7 (f=101)
PCI: Cannot allocate resource region 1 of device 01:02.1
PCI:01:02.1: Resource 2: 0000ffe8-0000ffef (f=101)
PCI: Cannot allocate resource region 2 of device 01:02.1
PCI:01:02.1: Resource 3: 0000ffe4-0000ffe7 (f=101)
PCI: Cannot allocate resource region 3 of device 01:02.1
PCI:01:02.1: Resource 4: 0000ffd0-0000ffdf (f=101)
PCI: Cannot allocate resource region 4 of device 01:02.1
PCI:01:02.2: Resource 4: 0000ffa0-0000ffbf (f=101)
PCI: Cannot allocate resource region 4 of device 01:02.2
PCI:01:02.3: Resource 4: 0000ff80-0000ff9f (f=101)
PCI: Cannot allocate resource region 4 of device 01:02.3
PCI:01:02.5: Resource 0: 0000fe00-0000feff (f=101)
PCI: Cannot allocate resource region 0 of device 01:02.5
PCI:01:02.5: Resource 1: 0000fdfc-0000fdff (f=101)
PCI: Cannot allocate resource region 1 of device 01:02.5
PCI:01:02.5: Resource 2: 0000fdf8-0000fdfb (f=101)
PCI: Cannot allocate resource region 2 of device 01:02.5
PCI:01:02.6: Resource 0: 0000fc00-0000fcff (f=101)
PCI: Cannot allocate resource region 0 of device 01:02.6
Oops: kernel access of bad area, sig: 11
NIP: C01382D4 XER: 00000000 LR: C000D058 SP: C0261F50 REGS: c0261ea0 TRAP: 0300    Not tainted
MSR: 00009032 EE: 1 PR: 0 FP: 0 ME: 1 IR/DR: 11
DAR: 00000008, DSISR: 22000000
TASK = c0260000[1] 'swapper' Last syscall: -1
last math 00000000 last altivec 00000000
GPR00: 00000000 C0261F50 C0260000 C024A640 00001032 C0261F78 00000F38 00000000
GPR08: FEC00000 00001000 00160000 C024A6D4 24002022 20122F04 03FE6000 03F3FC18
GPR16: 00000000 00000001 007FFF00 FFFFFFFF 003FF000 00000000 00000000 C0130000
GPR24: C024A64C C024A640 C0184000 007FFF26 C024A6C0 C0150000 00000000 C0249400
Call backtrace:
C00A9874 C000D058 C0138574 C01459B8 C01365DC C0003AC8 C0008298
Kernel panic: Attempted to kill init!
  <0>Rebooting in 180 seconds..



--

Regards, John


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/

PCI Resource allocation

[Deepak Pandian]

Hi,

In ppc4xx_pci i see the pci size to be declared as
 u32 lah, lal, pciah, pcial, sa;

Also at many other places I see the pci region is not capable of
handling resources > 4GB. I am planning to work on this arch specific
code to make it handle pci resource of width greater than 4 GB.

But before that i wanted to clarify whether the core kernel will be
able to handle pci regions with width greater than  4GB.

-- 
With Regards,
Deepak Pandian
"Time is precious,One day we will find that we have less than what we
think" -RandyPausch
www.peerlessdeepak.wordpress.com

Re: PCI Resource allocation

[Benjamin Herrenschmidt]

On Fri, 2008-12-05 at 00:06 +0530, Deepak Pandian wrote:
> Hi,
> 
> In ppc4xx_pci i see the pci size to be declared as
>  u32 lah, lal, pciah, pcial, sa;

I think the 4xx code is pretty much ok at this stage no ?

> Also at many other places I see the pci region is not capable of
> handling resources > 4GB. I am planning to work on this arch specific
> code to make it handle pci resource of width greater than 4 GB.

Which "many other places" ?

> But before that i wanted to clarify whether the core kernel will be
> able to handle pci regions with width greater than  4GB.

There's at least one place in the generic PCI code, in
pci_read_bridge_bases(), that needs fixing in a similar way as we
already fixed __pci_read_base(), ie by testing the resource_size_t size
rather than whether the platform is 64-bit.

There might be a few more.

Cheers,
Ben.

RE: PCI Resource allocation

[Flores, Raul]

A bit off topic, but since the subject is pci resource allocation:

As entered here:
http://bugs.gentoo.org/show_bug.cgi?id=249832

the 2.6.24-gentoo-r3 kernel; iomem tree for my video display works, but
has not worked in the following kernels:
2.6.26-gentoo-r2
2.6.27-gentoo-r2
2.6.28-rc4 (perfmon2 git)

Using g5_defconfig on an iMac G5 iSight PowerMac 12,1 ppc64 (cross 32
userspace) PPC970FX

Had to hack to arch/powerpc/kernel/pci-common.c in alloc_resource() so
that I could run the 2.6.28 kernel with perfmon2.


Thanks for all the work that gets done here,

Raul


-----Original Message-----
From: linuxppc-dev-bounces+raul.flores=lmco.com@ozlabs.org
[mailto:linuxppc-dev-bounces+raul.flores=lmco.com@ozlabs.org] On Behalf
Of Benjamin Herrenschmidt
Sent: Thursday, December 04, 2008 4:54 PM
To: Deepak Pandian
Cc: linuxppc-dev@ozlabs.org
Subject: Re: PCI Resource allocation

On Fri, 2008-12-05 at 00:06 +0530, Deepak Pandian wrote:
> Hi,
> 
> In ppc4xx_pci i see the pci size to be declared as
>  u32 lah, lal, pciah, pcial, sa;

I think the 4xx code is pretty much ok at this stage no ?

> Also at many other places I see the pci region is not capable of
> handling resources > 4GB. I am planning to work on this arch specific
> code to make it handle pci resource of width greater than 4 GB.

Which "many other places" ?

> But before that i wanted to clarify whether the core kernel will be
> able to handle pci regions with width greater than  4GB.

There's at least one place in the generic PCI code, in
pci_read_bridge_bases(), that needs fixing in a similar way as we
already fixed __pci_read_base(), ie by testing the resource_size_t size
rather than whether the platform is 64-bit.

There might be a few more.

Cheers,
Ben.


_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev

RE: PCI Resource allocation

[Benjamin Herrenschmidt]

On Thu, 2008-12-04 at 18:12 -0600, Flores, Raul wrote:
> A bit off topic, but since the subject is pci resource allocation:
> 
> As entered here:
> http://bugs.gentoo.org/show_bug.cgi?id=249832
> 
> the 2.6.24-gentoo-r3 kernel; iomem tree for my video display works, but
> has not worked in the following kernels:
> 2.6.26-gentoo-r2
> 2.6.27-gentoo-r2
> 2.6.28-rc4 (perfmon2 git)
> 
> Using g5_defconfig on an iMac G5 iSight PowerMac 12,1 ppc64 (cross 32
> userspace) PPC970FX
> 
> Had to hack to arch/powerpc/kernel/pci-common.c in alloc_resource() so
> that I could run the 2.6.28 kernel with perfmon2.

That's strange... looks like something fishy with the PCI-E root
complex, can you enable DEBUG in pci-common.c and pci_64.c and send me
the resulting dmesg output ?

Cheers,
Ben.

Re: PCI Resource allocation

[Deepak Pandian]

Hi Ben,

On Fri, Dec 5, 2008 at 4:24 AM, Benjamin Herrenschmidt
<benh@kernel.crashing.org> wrote:
> On Fri, 2008-12-05 at 00:06 +0530, Deepak Pandian wrote:
>> Hi,
>>
>> In ppc4xx_pci i see the pci size to be declared as
>>  u32 lah, lal, pciah, pcial, sa;
>
> I think the 4xx code is pretty much ok at this stage no ?

Nope. I dont think so . sa is declared as u32 which overrules pci
region width > 4GB.
Further while setting up the outbound mapping ,

          if (!is_power_of_2(sa) || sa < 0x100000 ||
                            sa > 0xffffffffu) {
                        printk(KERN_WARNING "%s: Resource out of range\n",
                               port->node->full_name);
                        continue;
                }
the code marks regions with width > 4 GB as out of range.


>> Also at many other places I see the pci region is not capable of
>> handling resources > 4GB. I am planning to work on this arch specific
>> code to make it handle pci resource of width greater than 4 GB.
>
> Which "many other places" ?

In 4xx the OMR registers are programmed to handle only a maximum of 4 GB.
 I am in process of understanding how pci resources are allocated in
core kernel. But as far as i digged I could see
pci_read_bases,pci_alloc_bus_resource needs fixing.

>> But before that i wanted to clarify whether the core kernel will be
>> able to handle pci regions with width greater than  4GB.
>
> There's at least one place in the generic PCI code, in
> pci_read_bridge_bases(), that needs fixing in a similar way as we
> already fixed __pci_read_base(), ie by testing the resource_size_t size
> rather than whether the platform is 64-bit.
>

Thanks Ben. Luckily I have a  device which seeks more than 4 GB , so I
will try to fix it


-- 
With Regards,
Deepak Pandian
"Time is precious,One day we will find that we have less than what we
think" -RandyPausch
www.peerlessdeepak.wordpress.com

PCI Resource Allocation

[Robert Jones]

Greetings,

I'm looking into a PCI resource limitation issue on an IMX6 based
board and I find that in the 3.14 kernel I am able to use 6 Ath10k
devices with the following resources:

03:00.0 Network controller: Qualcomm Atheros QCA986x/988x 802.11ac
Wireless Network Adapter
        Flags: fast devsel, IRQ 155
        Memory at 01200000 (64-bit, non-prefetchable) [disabled] [size=2M]
        [virtual] Expansion ROM at 01100000 [disabled] [size=64K]
        Capabilities: [40] Power Management version 2
        Capabilities: [50] MSI: Enable- Count=1/8 Maskable+ 64bit-
        Capabilities: [70] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Virtual Channel
        Capabilities: [160] Device Serial Number 00-00-00-00-00-00-00-00

In the 3.15 kernel following commit
(5b28541552ef5eeffc41d6936105f38c2508e566), allocation has changed in
such a way that results in none of the 6 radios nor the pci based
ethernet interface being mapped.
I am very new to PCI but after fiddling with some of the changes in
the aforementioned commit I was able to come up with a 1 line patch
that allows all 6 radios to once again become mapped and usable on the
IMX6. The patch contents being:

--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -807,6 +807,7 @@ static struct resource
*find_free_bus_resource(struct pci_bus *bus,
 {
        int i;
        struct resource *r;
+       type_mask = IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH;

        pci_bus_for_each_resource(bus, r, i) {
                if (r == &ioport_resource || r == &iomem_resource)


I understand that this blatantly ignores the type mask parameter and
would greatly appreciate any insight that you can provide as far as
the proper way to proceed.

Note that the IMX6 has a limited memory window (16M) between the PCI
core and the memory controller. This is mapped as:

512KB config space
64KB io space
15MB mem space available for devices

Best Regards,
Robert

Re: PCI Resource Allocation

[Bjorn Helgaas]

Hi Robert,

On Mon, Sep 19, 2016 at 11:15:39AM -0700, Robert Jones wrote:
> Greetings,
> 
> I'm looking into a PCI resource limitation issue on an IMX6 based
> board and I find that in the 3.14 kernel I am able to use 6 Ath10k
> devices with the following resources:
> 
> 03:00.0 Network controller: Qualcomm Atheros QCA986x/988x 802.11ac
> Wireless Network Adapter
>         Flags: fast devsel, IRQ 155
>         Memory at 01200000 (64-bit, non-prefetchable) [disabled] [size=2M]
>         [virtual] Expansion ROM at 01100000 [disabled] [size=64K]
>         Capabilities: [40] Power Management version 2
>         Capabilities: [50] MSI: Enable- Count=1/8 Maskable+ 64bit-
>         Capabilities: [70] Express Endpoint, MSI 00
>         Capabilities: [100] Advanced Error Reporting
>         Capabilities: [140] Virtual Channel
>         Capabilities: [160] Device Serial Number 00-00-00-00-00-00-00-00
> 
> In the 3.15 kernel following commit
> (5b28541552ef5eeffc41d6936105f38c2508e566), allocation has changed in
> such a way that results in none of the 6 radios nor the pci based
> ethernet interface being mapped.
> I am very new to PCI but after fiddling with some of the changes in
> the aforementioned commit I was able to come up with a 1 line patch
> that allows all 6 radios to once again become mapped and usable on the
> IMX6. The patch contents being:
> 
> --- a/drivers/pci/setup-bus.c
> +++ b/drivers/pci/setup-bus.c
> @@ -807,6 +807,7 @@ static struct resource
> *find_free_bus_resource(struct pci_bus *bus,
>  {
>         int i;
>         struct resource *r;
> +       type_mask = IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFETCH;
> 
>         pci_bus_for_each_resource(bus, r, i) {
>                 if (r == &ioport_resource || r == &iomem_resource)
> 
> 
> I understand that this blatantly ignores the type mask parameter and
> would greatly appreciate any insight that you can provide as far as
> the proper way to proceed.
> 
> Note that the IMX6 has a limited memory window (16M) between the PCI
> core and the memory controller. This is mapped as:
> 
> 512KB config space
> 64KB io space
> 15MB mem space available for devices

Can you test this with a current kernel?  v3.15 is over two years old,
and there have been several fixes related to 5b28541552ef.

If a current kernel, e.g., v4.7, still fails, can you post the
complete dmesg log and contents of /proc/iomem?

Bjorn

Re: PCI Resource Allocation

[Robert Jones]

On Mon, Sep 19, 2016 at 12:41 PM, Bjorn Helgaas <helgaas@kernel.org> wrote:
> Hi Robert,
>
> On Mon, Sep 19, 2016 at 11:15:39AM -0700, Robert Jones wrote:
>> Greetings,
>>
>> I'm looking into a PCI resource limitation issue on an IMX6 based
>> board and I find that in the 3.14 kernel I am able to use 6 Ath10k
>> devices with the following resources:
>>
>> 03:00.0 Network controller: Qualcomm Atheros QCA986x/988x 802.11ac
>> Wireless Network Adapter
>>         Flags: fast devsel, IRQ 155
>>         Memory at 01200000 (64-bit, non-prefetchable) [disabled] [size=
=3D2M]
>>         [virtual] Expansion ROM at 01100000 [disabled] [size=3D64K]
>>         Capabilities: [40] Power Management version 2
>>         Capabilities: [50] MSI: Enable- Count=3D1/8 Maskable+ 64bit-
>>         Capabilities: [70] Express Endpoint, MSI 00
>>         Capabilities: [100] Advanced Error Reporting
>>         Capabilities: [140] Virtual Channel
>>         Capabilities: [160] Device Serial Number 00-00-00-00-00-00-00-00
>>
>> In the 3.15 kernel following commit
>> (5b28541552ef5eeffc41d6936105f38c2508e566), allocation has changed in
>> such a way that results in none of the 6 radios nor the pci based
>> ethernet interface being mapped.
>> I am very new to PCI but after fiddling with some of the changes in
>> the aforementioned commit I was able to come up with a 1 line patch
>> that allows all 6 radios to once again become mapped and usable on the
>> IMX6. The patch contents being:
>>
>> --- a/drivers/pci/setup-bus.c
>> +++ b/drivers/pci/setup-bus.c
>> @@ -807,6 +807,7 @@ static struct resource
>> *find_free_bus_resource(struct pci_bus *bus,
>>  {
>>         int i;
>>         struct resource *r;
>> +       type_mask =3D IORESOURCE_IO | IORESOURCE_MEM | IORESOURCE_PREFET=
CH;
>>
>>         pci_bus_for_each_resource(bus, r, i) {
>>                 if (r =3D=3D &ioport_resource || r =3D=3D &iomem_resourc=
e)
>>
>>
>> I understand that this blatantly ignores the type mask parameter and
>> would greatly appreciate any insight that you can provide as far as
>> the proper way to proceed.
>>
>> Note that the IMX6 has a limited memory window (16M) between the PCI
>> core and the memory controller. This is mapped as:
>>
>> 512KB config space
>> 64KB io space
>> 15MB mem space available for devices
>
> Can you test this with a current kernel?  v3.15 is over two years old,
> and there have been several fixes related to 5b28541552ef.

Hello Bjorn, thank you for the quick response.
I suppose I should have previously mentioned that I had also tested
this on a v4.4 kernel,
but I went ahead and tested on the v4.7-rc7 branch and experienced the
same behavior.

> If a current kernel, e.g., v4.7, still fails, can you post the
> complete dmesg log and contents of /proc/iomem?

dmesg log:

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 4.7.0-rc7 (rjones@rjones) (gcc version
4.8.3 (OpenWrt/Linaro GCC 4.8-2014.04 r42297) ) #52 SMP Mon Sep 19
13:16:27 PDT 2016
[    0.000000] CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=3D10=
c5387d
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing
instruction cache
[    0.000000] Machine model: Gateworks Ventana i.MX6 Dual/Quad GW54XX
[    0.000000] cma: Reserved 16 MiB at 0x4f000000
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] On node 0 totalpages: 262144
[    0.000000] free_area_init_node: node 0, pgdat c0e6bbc0,
node_mem_map ef7f8000
[    0.000000]   Normal zone: 1536 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 196608 pages, LIFO batch:31
[    0.000000]   HighMem zone: 65536 pages, LIFO batch:15
[    0.000000] percpu: Embedded 13 pages/cpu @ef795000 s24448 r8192
d20608 u53248
[    0.000000] pcpu-alloc: s24448 r8192 d20608 u53248 alloc=3D13*4096
[    0.000000] pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.
Total pages: 260608
[    0.000000] Kernel command line: console=3Dttymxc1,115200
root=3D/dev/mmcblk0p1 rootfstype=3Dext4 rootwait rw  coherent_pool=3D4M
[    0.000000] PID hash table entries: 4096 (order: 2, 16384 bytes)
[    0.000000] Dentry cache hash table entries: 131072 (order: 7, 524288 by=
tes)
[    0.000000] Inode-cache hash table entries: 65536 (order: 6, 262144 byte=
s)
[    0.000000] Memory: 1000756K/1048576K available (9220K kernel code,
436K rwdata, 2864K rodata, 1024K init, 8225K bss, 31436K reserved,
16384K cma-reserved, 245760K highmem)
[    0.000000] Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xffc00000 - 0xfff00000   (3072 kB)
    vmalloc : 0xf0800000 - 0xff800000   ( 240 MB)
    lowmem  : 0xc0000000 - 0xf0000000   ( 768 MB)
    pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
    modules : 0xbf000000 - 0xbfe00000   (  14 MB)
      .text : 0xc0008000 - 0xc0ccd08c   (13077 kB)
      .init : 0xc0d00000 - 0xc0e00000   (1024 kB)
      .data : 0xc0e00000 - 0xc0e6d3e0   ( 437 kB)
       .bss : 0xc0e6f000 - 0xc16775fc   (8226 kB)
[    0.000000] SLUB: HWalign=3D64, Order=3D0-3, MinObjects=3D0, CPUs=3D4, N=
odes=3D1
[    0.000000] Running RCU self tests
[    0.000000] Hierarchical RCU implementation.
[    0.000000]   RCU lockdep checking is enabled.
[    0.000000]   Build-time adjustment of leaf fanout to 32.
[    0.000000] NR_IRQS:16 nr_irqs:16 16
[    0.000000] L2C-310 erratum 769419 enabled
[    0.000000] L2C-310 enabling early BRESP for Cortex-A9
[    0.000000] L2C-310 full line of zeros enabled for Cortex-A9
[    0.000000] L2C-310 ID prefetch enabled, offset 1 lines
[    0.000000] L2C-310 dynamic clock gating enabled, standby mode enabled
[    0.000000] L2C-310 cache controller enabled, 16 ways, 1024 kB
[    0.000000] L2C-310: CACHE_ID 0x410000c7, AUX_CTRL 0x76070001
[    0.000000] Switching to timer-based delay loop, resolution 333ns
[    0.000007] sched_clock: 32 bits at 3000kHz, resolution 333ns,
wraps every 715827882841ns
[    0.000028] clocksource: mxc_timer1: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 637086815595 ns
[    0.001371] Console: colour dummy device 80x30
[    0.001400] Lock dependency validator: Copyright (c) 2006 Red Hat,
Inc., Ingo Molnar
[    0.001410] ... MAX_LOCKDEP_SUBCLASSES:  8
[    0.001419] ... MAX_LOCK_DEPTH:          48
[    0.001428] ... MAX_LOCKDEP_KEYS:        8191
[    0.001436] ... CLASSHASH_SIZE:          4096
[    0.001444] ... MAX_LOCKDEP_ENTRIES:     32768
[    0.001452] ... MAX_LOCKDEP_CHAINS:      65536
[    0.001459] ... CHAINHASH_SIZE:          32768
[    0.001468]  memory used by lock dependency info: 5167 kB
[    0.001477]  per task-struct memory footprint: 1536 bytes
[    0.001515] Calibrating delay loop (skipped), value calculated
using timer frequency.. 6.00 BogoMIPS (lpj=3D30000)
[    0.001536] pid_max: default: 32768 minimum: 301
[    0.001822] Mount-cache hash table entries: 2048 (order: 1, 8192 bytes)
[    0.001840] Mountpoint-cache hash table entries: 2048 (order: 1, 8192 by=
tes)
[    0.003560] CPU: Testing write buffer coherency: ok
[    0.004501] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.004571] Setting up static identity map for 0x10100000 - 0x10100070
[    0.009217] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[    0.011024] CPU2: thread -1, cpu 2, socket 0, mpidr 80000002
[    0.012419] CPU3: thread -1, cpu 3, socket 0, mpidr 80000003
[    0.012627] Brought up 4 CPUs
[    0.012660] SMP: Total of 4 processors activated (24.00 BogoMIPS).
[    0.012672] CPU: All CPU(s) started in SVC mode.
[    0.014868] devtmpfs: initialized
[    0.043911] VFP support v0.3: implementor 41 architecture 3 part 30
variant 9 rev 4
[    0.044781] clocksource: jiffies: mask: 0xffffffff max_cycles:
0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.045961] pinctrl core: initialized pinctrl subsystem
[    0.049124] NET: Registered protocol family 16
[    0.063428] DMA: preallocated 4096 KiB pool for atomic coherent allocati=
ons
[    0.089695] cpuidle: using governor menu
[    0.089826] CPU identified as i.MX6Q, silicon rev 1.2
[    0.141272] No ATAGs?
[    0.141324] hw-breakpoint: found 5 (+1 reserved) breakpoint and 1
watchpoint registers.
[    0.141339] hw-breakpoint: maximum watchpoint size is 4 bytes.
[    0.143969] imx6q-pinctrl 20e0000.iomuxc: initialized IMX pinctrl driver
[    0.206952] mxs-dma 110000.dma-apbh: initialized
[    0.212586] vgaarb: loaded
[    0.213386] SCSI subsystem initialized
[    0.213799] libata version 3.00 loaded.
[    0.214506] usbcore: registered new interface driver usbfs
[    0.214660] usbcore: registered new interface driver hub
[    0.214896] usbcore: registered new device driver usb
[    0.219763] i2c i2c-0: IMX I2C adapter registered
[    0.219795] i2c i2c-0: can't use DMA, using PIO instead.
[    0.221852] i2c i2c-1: IMX I2C adapter registered
[    0.221884] i2c i2c-1: can't use DMA, using PIO instead.
[    0.223671] i2c i2c-2: IMX I2C adapter registered
[    0.223700] i2c i2c-2: can't use DMA, using PIO instead.
[    0.223947] Linux video capture interface: v2.00
[    0.224170] pps_core: LinuxPPS API ver. 1 registered
[    0.224183] pps_core: Software ver. 5.3.6 - Copyright 2005-2007
Rodolfo Giometti <giometti@linux.it>
[    0.224228] PTP clock support registered
[    0.225012] Advanced Linux Sound Architecture Driver Initialized.
[    0.228126] Bluetooth: Core ver 2.21
[    0.228212] NET: Registered protocol family 31
[    0.228224] Bluetooth: HCI device and connection manager initialized
[    0.228284] Bluetooth: HCI socket layer initialized
[    0.228312] Bluetooth: L2CAP socket layer initialized
[    0.228430] Bluetooth: SCO socket layer initialized
[    0.231150] clocksource: Switched to clocksource mxc_timer1
[    0.231705] VFS: Disk quotas dquot_6.6.0
[    0.231828] VFS: Dquot-cache hash table entries: 1024 (order 0, 4096 byt=
es)
[    0.259877] NET: Registered protocol family 2
[    0.261500] TCP established hash table entries: 8192 (order: 3, 32768 by=
tes)
[    0.261660] TCP bind hash table entries: 8192 (order: 6, 294912 bytes)
[    0.264230] TCP: Hash tables configured (established 8192 bind 8192)
[    0.264422] UDP hash table entries: 512 (order: 3, 40960 bytes)
[    0.264780] UDP-Lite hash table entries: 512 (order: 3, 40960 bytes)
[    0.265820] NET: Registered protocol family 1
[    0.266861] RPC: Registered named UNIX socket transport module.
[    0.266878] RPC: Registered udp transport module.
[    0.266891] RPC: Registered tcp transport module.
[    0.266902] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.266920] PCI: CLS 0 bytes, default 64
[    0.268677] hw perfevents: enabled with armv7_cortex_a9 PMU driver,
7 counters available
[    0.272083] futex hash table entries: 1024 (order: 4, 65536 bytes)
[    0.274693] workingset: timestamp_bits=3D28 max_order=3D18 bucket_order=
=3D0
[    0.296757] NFS: Registering the id_resolver key type
[    0.296957] Key type id_resolver registered
[    0.296972] Key type id_legacy registered
[    0.297092] jffs2: version 2.2. (NAND) =C2=A9 2001-2006 Red Hat, Inc.
[    0.298786] fuse init (API version 7.25)
[    0.307331] bounce: pool size: 64 pages
[    0.307414] io scheduler noop registered
[    0.307429] io scheduler deadline registered
[    0.307515] io scheduler cfq registered (default)
[    0.308363] imx-weim 21b8000.weim: Driver registered.
[    0.312076] PCI host bridge /soc/pcie@0x01000000 ranges:
[    0.312098]   No bus range found for /soc/pcie@0x01000000, using [bus 00=
-ff]
[    0.312147]   err 0x01f00000..0x01f7ffff -> 0x01f00000
[    0.312186]    IO 0x01f80000..0x01f8ffff -> 0x00000000
[    0.312275]   MEM 0x01000000..0x01efffff -> 0x01000000
[    0.521249] imx6q-pcie 1ffc000.pcie: link up
[    0.521268] imx6q-pcie 1ffc000.pcie: Link: Gen2 disabled
[    0.521283] imx6q-pcie 1ffc000.pcie: link up
[    0.521296] imx6q-pcie 1ffc000.pcie: Link up, Gen1
[    0.521901] imx6q-pcie 1ffc000.pcie: PCI host bridge to bus 0000:00
[    0.521927] pci_bus 0000:00: root bus resource [bus 00-ff]
[    0.521946] pci_bus 0000:00: root bus resource [???
0x01f00000-0x01f7ffff flags 0x0]
[    0.521962] pci_bus 0000:00: root bus resource [io  0x0000-0xffff]
[    0.521978] pci_bus 0000:00: root bus resource [mem 0x01000000-0x01effff=
f]
[    0.522119] pci 0000:00:00.0: [16c3:abcd] type 01 class 0x060400
[    0.522168] pci 0000:00:00.0: reg 0x10: [mem 0x00000000-0x000fffff]
[    0.522207] pci 0000:00:00.0: reg 0x38: [mem 0x00000000-0x0000ffff pref]
[    0.522401] pci 0000:00:00.0: supports D1
[    0.522418] pci 0000:00:00.0: PME# supported from D0 D1 D3hot D3cold
[    0.523270] PCI: bus0: Fast back to back transfers disabled
[    0.523711] pci 0000:01:00.0: [10b5:8609] type 01 class 0x060400
[    0.631247] pci 0000:01:00.0: reg 0x10: [mem 0x00000000-0x0001ffff]
[    0.631952] pci 0000:01:00.0: PME# supported from D0 D3hot D3cold
[    0.632764] pci 0000:01:00.1: [10b5:8609] type 00 class 0x088000
[    0.632875] pci 0000:01:00.1: reg 0x10: [mem 0x00000000-0x0001ffff]
[    0.651322] PCI: bus1: Fast back to back transfers disabled
[    0.651352] pci 0000:01:00.0: bridge configuration invalid ([bus
00-00]), reconfiguring
[    0.651894] pci_bus 0000:02: busn_res: can not insert [bus 02-ff]
under [bus 01] (conflicts with (null) [bus 01])
[    0.652033] pci 0000:02:01.0: [10b5:8609] type 01 class 0x060400
[    0.652799] pci 0000:02:01.0: PME# supported from D0 D3hot D3cold
[    0.653627] pci 0000:02:04.0: [10b5:8609] type 01 class 0x060400
[    0.654396] pci 0000:02:04.0: PME# supported from D0 D3hot D3cold
[    0.655221] pci 0000:02:05.0: [10b5:8609] type 01 class 0x060400
[    0.655990] pci 0000:02:05.0: PME# supported from D0 D3hot D3cold
[    0.656809] pci 0000:02:06.0: [10b5:8609] type 01 class 0x060400
[    0.657570] pci 0000:02:06.0: PME# supported from D0 D3hot D3cold
[    0.658400] pci 0000:02:07.0: [10b5:8609] type 01 class 0x060400
[    0.659162] pci 0000:02:07.0: PME# supported from D0 D3hot D3cold
[    0.660004] pci 0000:02:08.0: [10b5:8609] type 01 class 0x060400
[    0.660772] pci 0000:02:08.0: PME# supported from D0 D3hot D3cold
[    0.661686] pci 0000:02:09.0: [10b5:8609] type 01 class 0x060400
[    0.662453] pci 0000:02:09.0: PME# supported from D0 D3hot D3cold
[    0.663765] PCI: bus2: Fast back to back transfers disabled
[    0.663793] pci 0000:02:01.0: bridge configuration invalid ([bus
00-00]), reconfiguring
[    0.663852] pci 0000:02:04.0: bridge configuration invalid ([bus
00-00]), reconfiguring
[    0.663908] pci 0000:02:05.0: bridge configuration invalid ([bus
00-00]), reconfiguring
[    0.663965] pci 0000:02:06.0: bridge configuration invalid ([bus
00-00]), reconfiguring
[    0.664021] pci 0000:02:07.0: bridge configuration invalid ([bus
00-00]), reconfiguring
[    0.664077] pci 0000:02:08.0: bridge configuration invalid ([bus
00-00]), reconfiguring
[    0.664133] pci 0000:02:09.0: bridge configuration invalid ([bus
00-00]), reconfiguring
[    0.664778] pci 0000:03:00.0: [168c:003c] type 00 class 0x028000
[    0.664929] pci 0000:03:00.0: reg 0x10: [mem 0x00000000-0x001fffff 64bit=
]
[    0.665169] pci 0000:03:00.0: reg 0x30: [mem 0x00000000-0x0000ffff pref]
[    0.665634] pci 0000:03:00.0: supports D1 D2
[    0.666391] PCI: bus3: Fast back to back transfers disabled
[    0.666415] pci_bus 0000:03: busn_res: [bus 03-ff] end is updated to 03
[    0.666444] pci_bus 0000:03: [bus 03] partially hidden behind
bridge 0000:01 [bus 01]
[    0.667069] pci 0000:04:00.0: [168c:003c] type 00 class 0x028000
[    0.667217] pci 0000:04:00.0: reg 0x10: [mem 0x00000000-0x001fffff 64bit=
]
[    0.667457] pci 0000:04:00.0: reg 0x30: [mem 0x00000000-0x0000ffff pref]
[    0.667920] pci 0000:04:00.0: supports D1 D2
[    0.668674] PCI: bus4: Fast back to back transfers disabled
[    0.668696] pci_bus 0000:04: busn_res: [bus 04-ff] end is updated to 04
[    0.668723] pci_bus 0000:04: [bus 04] partially hidden behind
bridge 0000:01 [bus 01]
[    0.669341] pci 0000:05:00.0: [168c:003c] type 00 class 0x028000
[    0.669488] pci 0000:05:00.0: reg 0x10: [mem 0x00000000-0x001fffff 64bit=
]
[    0.669727] pci 0000:05:00.0: reg 0x30: [mem 0x00000000-0x0000ffff pref]
[    0.670193] pci 0000:05:00.0: supports D1 D2
[    0.670951] PCI: bus5: Fast back to back transfers disabled
[    0.670972] pci_bus 0000:05: busn_res: [bus 05-ff] end is updated to 05
[    0.670998] pci_bus 0000:05: [bus 05] partially hidden behind
bridge 0000:01 [bus 01]
[    0.671674] pci 0000:06:00.0: [168c:003c] type 00 class 0x028000
[    0.671822] pci 0000:06:00.0: reg 0x10: [mem 0x00000000-0x001fffff 64bit=
]
[    0.672062] pci 0000:06:00.0: reg 0x30: [mem 0x00000000-0x0000ffff pref]
[    0.672526] pci 0000:06:00.0: supports D1 D2
[    0.673296] PCI: bus6: Fast back to back transfers disabled
[    0.673318] pci_bus 0000:06: busn_res: [bus 06-ff] end is updated to 06
[    0.673346] pci_bus 0000:06: [bus 06] partially hidden behind
bridge 0000:01 [bus 01]
[    0.673954] pci 0000:07:00.0: [168c:003c] type 00 class 0x028000
[    0.674101] pci 0000:07:00.0: reg 0x10: [mem 0x00000000-0x001fffff 64bit=
]
[    0.674341] pci 0000:07:00.0: reg 0x30: [mem 0x00000000-0x0000ffff pref]
[    0.674804] pci 0000:07:00.0: supports D1 D2
[    0.675572] PCI: bus7: Fast back to back transfers disabled
[    0.675594] pci_bus 0000:07: busn_res: [bus 07-ff] end is updated to 07
[    0.675621] pci_bus 0000:07: [bus 07] partially hidden behind
bridge 0000:01 [bus 01]
[    0.676239] pci 0000:08:00.0: [11ab:4380] type 00 class 0x020000
[    0.676387] pci 0000:08:00.0: reg 0x10: [mem 0x00000000-0x00003fff 64bit=
]
[    0.676450] pci 0000:08:00.0: reg 0x18: [io  0x0000-0x00ff]
[    0.677040] pci 0000:08:00.0: supports D1 D2
[    0.677056] pci 0000:08:00.0: PME# supported from D0 D1 D2 D3hot D3cold
[    0.677960] PCI: bus8: Fast back to back transfers disabled
[    0.677981] pci_bus 0000:08: busn_res: [bus 08-ff] end is updated to 08
[    0.678009] pci_bus 0000:08: [bus 08] partially hidden behind
bridge 0000:01 [bus 01]
[    0.678630] pci 0000:09:00.0: [168c:003c] type 00 class 0x028000
[    0.678779] pci 0000:09:00.0: reg 0x10: [mem 0x00000000-0x001fffff 64bit=
]
[    0.679018] pci 0000:09:00.0: reg 0x30: [mem 0x00000000-0x0000ffff pref]
[    0.679483] pci 0000:09:00.0: supports D1 D2
[    0.680255] PCI: bus9: Fast back to back transfers disabled
[    0.680277] pci_bus 0000:09: busn_res: [bus 09-ff] end is updated to 09
[    0.680305] pci_bus 0000:09: [bus 09] partially hidden behind
bridge 0000:01 [bus 01]
[    0.680332] pci_bus 0000:02: busn_res: [bus 02-ff] end is updated to 09
[    0.680350] pci_bus 0000:02: busn_res: can not insert [bus 02-09]
under [bus 01] (conflicts with (null) [bus 01])
[    0.680377] pci_bus 0000:02: [bus 02-09] partially hidden behind
bridge 0000:01 [bus 01]
[    0.680402] pci 0000:00:00.0: bridge has subordinate 01 but max busn 09
[    0.682168] pci 0000:00:00.0: BAR 0: assigned [mem 0x01000000-0x010fffff=
]
[    0.682199] pci 0000:00:00.0: BAR 8: no space for [mem size 0x01400000]
[    0.682217] pci 0000:00:00.0: BAR 8: failed to assign [mem size 0x014000=
00]
[    0.682237] pci 0000:00:00.0: BAR 6: assigned [mem
0x01100000-0x0110ffff pref]
[    0.682257] pci 0000:00:00.0: BAR 7: assigned [io  0x1000-0x1fff]
[    0.682281] pci 0000:01:00.0: BAR 8: no space for [mem size 0x01300000]
[    0.682296] pci 0000:01:00.0: BAR 8: failed to assign [mem size 0x013000=
00]
[    0.682310] pci 0000:01:00.0: BAR 0: no space for [mem size 0x00020000]
[    0.682324] pci 0000:01:00.0: BAR 0: failed to assign [mem size 0x000200=
00]
[    0.682339] pci 0000:01:00.1: BAR 0: no space for [mem size 0x00020000]
[    0.682352] pci 0000:01:00.1: BAR 0: failed to assign [mem size 0x000200=
00]
[    0.682369] pci 0000:01:00.0: BAR 7: assigned [io  0x1000-0x1fff]
[    0.682396] pci 0000:02:01.0: BAR 8: no space for [mem size 0x00300000]
[    0.682411] pci 0000:02:01.0: BAR 8: failed to assign [mem size 0x003000=
00]
[    0.682425] pci 0000:02:04.0: BAR 8: no space for [mem size 0x00300000]
[    0.682438] pci 0000:02:04.0: BAR 8: failed to assign [mem size 0x003000=
00]
[    0.682452] pci 0000:02:05.0: BAR 8: no space for [mem size 0x00300000]
[    0.682466] pci 0000:02:05.0: BAR 8: failed to assign [mem size 0x003000=
00]
[    0.682481] pci 0000:02:06.0: BAR 8: no space for [mem size 0x00300000]
[    0.682494] pci 0000:02:06.0: BAR 8: failed to assign [mem size 0x003000=
00]
[    0.682509] pci 0000:02:07.0: BAR 8: no space for [mem size 0x00300000]
[    0.682522] pci 0000:02:07.0: BAR 8: failed to assign [mem size 0x003000=
00]
[    0.682535] pci 0000:02:08.0: BAR 8: no space for [mem size 0x00100000]
[    0.682548] pci 0000:02:08.0: BAR 8: failed to assign [mem size 0x001000=
00]
[    0.682563] pci 0000:02:09.0: BAR 8: no space for [mem size 0x00300000]
[    0.682577] pci 0000:02:09.0: BAR 8: failed to assign [mem size 0x003000=
00]
[    0.682593] pci 0000:02:08.0: BAR 7: assigned [io  0x1000-0x1fff]
[    0.682616] pci 0000:03:00.0: BAR 0: no space for [mem size 0x00200000 6=
4bit]
[    0.682631] pci 0000:03:00.0: BAR 0: failed to assign [mem size
0x00200000 64bit]
[    0.682645] pci 0000:03:00.0: BAR 6: no space for [mem size 0x00010000 p=
ref]
[    0.682659] pci 0000:03:00.0: BAR 6: failed to assign [mem size
0x00010000 pref]
[    0.682675] pci 0000:02:01.0: PCI bridge to [bus 03]
[    0.682773] pci 0000:04:00.0: BAR 0: no space for [mem size 0x00200000 6=
4bit]
[    0.682788] pci 0000:04:00.0: BAR 0: failed to assign [mem size
0x00200000 64bit]
[    0.682802] pci 0000:04:00.0: BAR 6: no space for [mem size 0x00010000 p=
ref]
[    0.682817] pci 0000:04:00.0: BAR 6: failed to assign [mem size
0x00010000 pref]
[    0.682832] pci 0000:02:04.0: PCI bridge to [bus 04]
[    0.682926] pci 0000:05:00.0: BAR 0: no space for [mem size 0x00200000 6=
4bit]
[    0.682941] pci 0000:05:00.0: BAR 0: failed to assign [mem size
0x00200000 64bit]
[    0.682956] pci 0000:05:00.0: BAR 6: no space for [mem size 0x00010000 p=
ref]
[    0.682968] pci 0000:05:00.0: BAR 6: failed to assign [mem size
0x00010000 pref]
[    0.682982] pci 0000:02:05.0: PCI bridge to [bus 05]
[    0.683076] pci 0000:06:00.0: BAR 0: no space for [mem size 0x00200000 6=
4bit]
[    0.683091] pci 0000:06:00.0: BAR 0: failed to assign [mem size
0x00200000 64bit]
[    0.683106] pci 0000:06:00.0: BAR 6: no space for [mem size 0x00010000 p=
ref]
[    0.683120] pci 0000:06:00.0: BAR 6: failed to assign [mem size
0x00010000 pref]
[    0.683134] pci 0000:02:06.0: PCI bridge to [bus 06]
[    0.683228] pci 0000:07:00.0: BAR 0: no space for [mem size 0x00200000 6=
4bit]
[    0.683243] pci 0000:07:00.0: BAR 0: failed to assign [mem size
0x00200000 64bit]
[    0.683257] pci 0000:07:00.0: BAR 6: no space for [mem size 0x00010000 p=
ref]
[    0.683270] pci 0000:07:00.0: BAR 6: failed to assign [mem size
0x00010000 pref]
[    0.683285] pci 0000:02:07.0: PCI bridge to [bus 07]
[    0.683379] pci 0000:08:00.0: BAR 0: no space for [mem size 0x00004000 6=
4bit]
[    0.683394] pci 0000:08:00.0: BAR 0: failed to assign [mem size
0x00004000 64bit]
[    0.683413] pci 0000:08:00.0: BAR 2: assigned [io  0x1000-0x10ff]
[    0.683449] pci 0000:02:08.0: PCI bridge to [bus 08]
[    0.683473] pci 0000:02:08.0:   bridge window [io  0x1000-0x1fff]
[    0.683568] pci 0000:09:00.0: BAR 0: no space for [mem size 0x00200000 6=
4bit]
[    0.683583] pci 0000:09:00.0: BAR 0: failed to assign [mem size
0x00200000 64bit]
[    0.683597] pci 0000:09:00.0: BAR 6: no space for [mem size 0x00010000 p=
ref]
[    0.683611] pci 0000:09:00.0: BAR 6: failed to assign [mem size
0x00010000 pref]
[    0.683625] pci 0000:02:09.0: PCI bridge to [bus 09]
[    0.683715] pci 0000:01:00.0: PCI bridge to [bus 02-09]
[    0.683739] pci 0000:01:00.0:   bridge window [io  0x1000-0x1fff]
[    0.683829] pci 0000:00:00.0: PCI bridge to [bus 01]
[    0.683846] pci 0000:00:00.0:   bridge window [io  0x1000-0x1fff]
[    0.684621] pcieport 0000:00:00.0: Signaling PME through PCIe PME interr=
upt
[    0.684642] pci 0000:01:00.0: Signaling PME through PCIe PME interrupt
[    0.684656] pci 0000:02:01.0: Signaling PME through PCIe PME interrupt
[    0.684669] pci 0000:03:00.0: Signaling PME through PCIe PME interrupt
[    0.684682] pci 0000:02:04.0: Signaling PME through PCIe PME interrupt
[    0.684695] pci 0000:04:00.0: Signaling PME through PCIe PME interrupt
[    0.684708] pci 0000:02:05.0: Signaling PME through PCIe PME interrupt
[    0.684720] pci 0000:05:00.0: Signaling PME through PCIe PME interrupt
[    0.684732] pci 0000:02:06.0: Signaling PME through PCIe PME interrupt
[    0.684742] pci 0000:06:00.0: Signaling PME through PCIe PME interrupt
[    0.684754] pci 0000:02:07.0: Signaling PME through PCIe PME interrupt
[    0.684766] pci 0000:07:00.0: Signaling PME through PCIe PME interrupt
[    0.684778] pci 0000:02:08.0: Signaling PME through PCIe PME interrupt
[    0.684791] pci 0000:08:00.0: Signaling PME through PCIe PME interrupt
[    0.684804] pci 0000:02:09.0: Signaling PME through PCIe PME interrupt
[    0.684816] pci 0000:09:00.0: Signaling PME through PCIe PME interrupt
[    0.684829] pci 0000:01:00.1: Signaling PME through PCIe PME interrupt
[    0.684849] pcie_pme 0000:00:00.0:pcie001: service driver pcie_pme loade=
d
[    0.685560] aer 0000:00:00.0:pcie002: service driver aer loaded
[    0.686013] pcieport 0000:01:00.0: enabling device (0140 -> 0141)
[    0.693772] pcieport 0000:02:08.0: enabling device (0140 -> 0141)
[    0.698203] backlight supply power not found, using dummy regulator
[    0.705039] imx-sdma 20ec000.sdma: Direct firmware load for
imx/sdma/sdma-imx6q.bin failed with error -2
[    0.705068] imx-sdma 20ec000.sdma: external firmware not found,
using ROM firmware
[    0.715584] pfuze100-regulator 1-0008: Full layer: 1, Metal layer: 1
[    0.716416] pfuze100-regulator 1-0008: FAB: 0, FIN: 0
[    0.716435] pfuze100-regulator 1-0008: pfuze100 found.
[    0.745179] 2020000.serial: ttymxc0 at MMIO 0x2020000 (irq =3D 24,
base_baud =3D 5000000) is a IMX
[    0.747253] 21e8000.serial: ttymxc1 at MMIO 0x21e8000 (irq =3D 294,
base_baud =3D 5000000) is a IMX
[    2.363063] console [ttymxc1] enabled
[    2.368303] 21f4000.serial: ttymxc4 at MMIO 0x21f4000 (irq =3D 295,
base_baud =3D 5000000) is a IMX
[    2.379170] [drm] Initialized drm 1.1.0 20060810
[    2.391032] imx-ipuv3 2400000.ipu: IPUv3H probed
[    2.400749] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[    2.407419] [drm] No driver support for vblank timestamp query.
[    2.414407] imx-drm display-subsystem: bound imx-ipuv3-crtc.2 (ops
ipu_crtc_ops)
[    2.422320] imx-drm display-subsystem: bound imx-ipuv3-crtc.3 (ops
ipu_crtc_ops)
[    2.430170] imx-drm display-subsystem: bound imx-ipuv3-crtc.6 (ops
ipu_crtc_ops)
[    2.438060] imx-drm display-subsystem: bound imx-ipuv3-crtc.7 (ops
ipu_crtc_ops)
[    2.446011] dwhdmi-imx 120000.hdmi: Detected HDMI controller
0x13:0xa:0xa0:0xc1
[    2.454946] imx-drm display-subsystem: bound 120000.hdmi (ops
dw_hdmi_imx_ops)
[    2.462959] imx-drm display-subsystem: bound
2000000.aips-bus:ldb@020e0008 (ops imx_ldb_ops)
[    2.488240] Console: switching to colour frame buffer device 128x48
[    2.499931] imx-drm display-subsystem: fb0:  frame buffer device
[    2.531166] [drm] Initialized imx-drm 1.0.0 20120507 on minor 0
[    2.537134] imx-ipuv3 2800000.ipu: IPUv3H probed
[    2.569296] brd: module loaded
[    2.590221] loop: module loaded
[    2.594172] at24 0-0050: 256 byte 24c02 EEPROM, writable, 16 bytes/write
[    2.601407] at24 0-0051: 256 byte 24c02 EEPROM, writable, 16 bytes/write
[    2.608602] at24 0-0052: 256 byte 24c02 EEPROM, writable, 16 bytes/write
[    2.615815] at24 0-0053: 256 byte 24c02 EEPROM, writable, 16 bytes/write
[    2.624255] ahci-imx 2200000.sata: fsl,transmit-level-mV not
specified, using 00000024
[    2.632221] ahci-imx 2200000.sata: fsl,transmit-boost-mdB not
specified, using 00000480
[    2.640240] ahci-imx 2200000.sata: fsl,transmit-atten-16ths not
specified, using 00002000
[    2.648455] ahci-imx 2200000.sata: fsl,receive-eq-mdB not
specified, using 05000000
[    2.659358] ahci-imx 2200000.sata: SSS flag set, parallel bus scan disab=
led
[    2.666392] ahci-imx 2200000.sata: AHCI 0001.0300 32 slots 1 ports
3 Gbps 0x1 impl platform mode
[    2.675234] ahci-imx 2200000.sata: flags: ncq sntf stag pm led clo
only pmp pio slum part ccc apst
[    2.687701] scsi host0: ahci-imx
[    2.692150] ata1: SATA max UDMA/133 mmio [mem
0x02200000-0x02203fff] port 0x100 irq 298
[    2.714621] nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xda
[    2.720989] nand: Micron MT29F2G08ABAEAH4
[    2.725035] nand: 256 MiB, SLC, erase size: 128 KiB, page size:
2048, OOB size: 64
[    2.733478] gpmi-nand 112000.gpmi-nand: enable the asynchronous EDO mode=
 5
[    2.740372] Scanning device for bad blocks
[    3.023241] ata1: SATA link down (SStatus 0 SControl 300)
[    3.028697] ahci-imx 2200000.sata: no device found, disabling link.
[    3.035015] ahci-imx 2200000.sata: pass ahci_imx..hotplug=3D1 to enable =
hotplug
[    3.094180] 3 ofpart partitions found on MTD device gpmi-nand
[    3.099939] Creating 3 MTD partitions on "gpmi-nand":
[    3.105050] 0x000000000000-0x000001000000 : "uboot"
[    3.122452] 0x000001000000-0x000001100000 : "env"
[    3.130569] 0x000001100000-0x000010000000 : "rootfs"
[    3.262868] gpmi-nand 112000.gpmi-nand: driver registered.
[    3.271639] CAN device driver interface
[    3.275970] 2090000.flexcan supply xceiver not found, using dummy regula=
tor
[    3.285067] flexcan 2090000.flexcan: device registered
(reg_base=3Df10e0000, irq=3D31)
[    3.294482] 2188000.ethernet supply phy not found, using dummy regulator
[    3.322596] pps pps0: new PPS source ptp0
[    3.334243] libphy: fec_enet_mii_bus: probed
[    3.339864] fec 2188000.ethernet eth0: registered PHC device 0
[    3.347025] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    3.353602] ehci-pci: EHCI PCI platform driver
[    3.358232] ehci-mxc: Freescale On-Chip EHCI Host driver
[    3.364355] usbcore: registered new interface driver usb-storage
[    3.387046] ci_hdrc ci_hdrc.1: EHCI Host Controller
[    3.392174] ci_hdrc ci_hdrc.1: new USB bus registered, assigned bus numb=
er 1
[    3.411188] ci_hdrc ci_hdrc.1: USB 2.0 started, EHCI 1.00
[    3.420061] hub 1-0:1.0: USB hub found
[    3.424055] hub 1-0:1.0: 1 port detected
[    3.432024] mousedev: PS/2 mouse device common for all mice
[    3.439774] egalax_ts 2-0004: Failed to read firmware version
[    3.450228] snvs_rtc 20cc000.snvs:snvs-rtc-lp: rtc core: registered
20cc000.snvs:snvs-r as rtc0
[    3.459209] i2c /dev entries driver
[    3.465238] IR NEC protocol handler initialized
[    3.469784] IR RC5(x/sz) protocol handler initialized
[    3.474939] IR RC6 protocol handler initialized
[    3.479482] IR JVC protocol handler initialized
[    3.484050] IR Sony protocol handler initialized
[    3.488679] IR SANYO protocol handler initialized
[    3.493412] IR Sharp protocol handler initialized
[    3.498127] IR MCE Keyboard/mouse protocol handler initialized
[    3.503991] IR XMP protocol handler initialized
[    3.511746] coda 2040000.vpu: Direct firmware load for
vpu_fw_imx6q.bin failed with error -2
[    3.520520] coda 2040000.vpu: Direct firmware load for
v4l-coda960-imx6q.bin failed with error -2
[    3.529452] coda 2040000.vpu: firmware request failed
[    3.533305] watchdog: Invalid min and max timeout values, resetting to 0=
!
[    3.535177] imx2-wdt 20c0000.wdog: timeout 60 sec (nowayout=3D0)
[    3.535442] Bluetooth: HCI UART driver ver 2.3
[    3.535452] Bluetooth: HCI UART protocol H4 registered
[    3.535457] Bluetooth: HCI UART protocol LL registered
[    3.536490] sdhci: Secure Digital Host Controller Interface driver
[    3.536493] sdhci: Copyright(c) Pierre Ossman
[    3.536497] sdhci-pltfm: SDHCI platform and OF driver helper
[    3.538837] sdhci-esdhc-imx 2198000.usdhc: Got CD GPIO
[    3.591503] mmc0: SDHCI controller on 2198000.usdhc [2198000.usdhc]
using ADMA
[    3.604053] caam 2100000.caam: Entropy delay =3D 3200
[    3.669726] caam 2100000.caam: Instantiated RNG4 SH0
[    3.730489] caam 2100000.caam: Instantiated RNG4 SH1
[    3.735629] caam 2100000.caam: device ID =3D 0x0a16010000000000 (Era 4)
[    3.742106] caam 2100000.caam: job rings =3D 2, qi =3D 0
[    3.764011] caam algorithms registered in /proc/crypto
[    3.774235] caam_jr 2101000.jr0: registering rng-caam
[    3.780522] usbcore: registered new interface driver usbhid
[    3.786143] usbhid: USB HID core driver
[    3.796288] sgtl5000 2-000a: sgtl5000 revision 0x11
[    3.800963] mmc0: host does not support reading read-only switch,
assuming write-enable
[    3.808935] mmc0: new high speed SDHC card at address aaaa
[    3.811191] usb 1-1: new high-speed USB device number 2 using ci_hdrc
[    3.811798] mmcblk0: mmc0:aaaa SS16G 14.8 GiB
[    3.815031]  mmcblk0: p1
[    3.866110] fsl-asoc-card sound: ASoC: CPU DAI (null) not registered
[    3.872534] fsl-asoc-card sound: snd_soc_register_card failed (-517)
[    3.879843] fsl-asrc 2034000.asrc: failed to get spba clock
[    3.886775] fsl-asrc 2034000.asrc: driver registered
[    3.892889] fsl-ssi-dai 2028000.ssi: No cache defaults, reading back fro=
m HW
[    3.901306] fsl-ssi-dai 202c000.ssi: No cache defaults, reading back fro=
m HW
[    3.913369] sgtl5000 2-000a: Using internal LDO instead of VDDD
[    3.940693] imx-sgtl5000 sound: sgtl5000 <-> 2028000.ssi mapping ok
[    3.956259] hub 1-1:1.0: USB hub found
[    3.957389] NET: Registered protocol family 10
[    3.960209] sit: IPv6 over IPv4 tunneling driver
[    3.962608] NET: Registered protocol family 17
[    3.962641] can: controller area network core (rev 20120528 abi 9)
[    3.962790] NET: Registered protocol family 29
[    3.962829] can: raw protocol (rev 20120528)
[    3.962909] can: broadcast manager protocol (rev 20120528 t)
[    3.962940] can: netlink gateway (rev 20130117) max_hops=3D1
[    3.963588] Key type dns_resolver registered
[    3.971024] Registering SWP/SWPB emulation handler
[    3.994928] imx_thermal 2000000.aips-bus:tempmon: Automotive CPU
temperature grade - max:125C critical:120C passive:115C
[    3.999845] snvs_rtc 20cc000.snvs:snvs-rtc-lp: setting system clock
to 1970-01-01 00:00:00 UTC (0)
[    4.029226] hub 1-1:1.0: 4 ports detected
[    4.031990] usb_otg_vbus: disabling
[    4.032036] VGEN1: disabling
[    4.039789] VGEN2: disabling
[    4.044066] ALSA device list:
[    4.047050]   #0: sgtl5000-audio
[    4.106534] EXT4-fs (mmcblk0p1): mounted filesystem with ordered
data mode. Opts: (null)
[    4.114788] VFS: Mounted root (ext4 filesystem) on device 179:1.
[    4.128737] devtmpfs: mounted
[    4.133573] Freeing unused kernel memory: 1024K (c0d00000 - c0e00000)
[    4.277541] init: Console is alive
[    4.281908] init: - watchdog -
[    5.287603] init: - preinit -
[    6.535997] random: procd urandom read with 119 bits of entropy availabl=
e
[    8.280527] random: nonblocking pool is initialized
[    8.613900] mount_root: mounting /dev/root
[    8.619613] EXT4-fs (mmcblk0p1): re-mounted. Opts: (null)
[    8.625798] mount_root: loading kmods from internal overlay
[    8.650458] mount_root: failed to launch kmodloader from internal overla=
y
[    8.690226] blk_update_request: I/O error, dev mtdblock0, sector 0
[    8.713668] blk_update_request: I/O error, dev mtdblock0, sector 0
[    8.719995] Buffer I/O error on dev mtdblock0, logical block 0,
async page read
[    8.813586] block: attempting to load /etc/config/fstab
[    8.820301] block: unable to load configuration (fstab: Entry not found)
[    8.827132] block: no usable configuration
[    8.840834] procd: - early -
[    8.843943] procd: - watchdog -
[    9.668279] procd: - ubus -
[   10.676040] procd: - init -

contents of /proc/iomem:

00110000-00111fff : /soc/dma-apbh@00110000
00112000-00113fff : gpmi-nand
00114000-00115fff : bch
00120000-00128fff : /soc/hdmi@0120000
00900000-0093ffff : 900000.sram
01ffc000-01ffffff : dbi
02020000-02023fff : /soc/aips-bus@02000000/spba-bus@02000000/serial@0202000=
0
02028000-0202bfff : /soc/aips-bus@02000000/spba-bus@02000000/ssi@02028000
0202c000-0202ffff : /soc/aips-bus@02000000/spba-bus@02000000/ssi@0202c000
02034000-02037fff : /soc/aips-bus@02000000/spba-bus@02000000/asrc@02034000
02040000-0207bfff : /soc/aips-bus@02000000/vpu@02040000
0208c000-0208ffff : /soc/aips-bus@02000000/pwm@0208c000
02090000-02093fff : /soc/aips-bus@02000000/flexcan@02090000
0209c000-0209ffff : /soc/aips-bus@02000000/gpio@0209c000
020a0000-020a3fff : /soc/aips-bus@02000000/gpio@020a0000
020a4000-020a7fff : /soc/aips-bus@02000000/gpio@020a4000
020a8000-020abfff : /soc/aips-bus@02000000/gpio@020a8000
020ac000-020affff : /soc/aips-bus@02000000/gpio@020ac000
020b0000-020b3fff : /soc/aips-bus@02000000/gpio@020b0000
020b4000-020b7fff : /soc/aips-bus@02000000/gpio@020b4000
020c0000-020c3fff : /soc/aips-bus@02000000/wdog@020c0000
020c9000-020c9fff : /soc/aips-bus@02000000/usbphy@020c9000
020ca000-020cafff : /soc/aips-bus@02000000/usbphy@020ca000
020e0000-020e3fff : /soc/aips-bus@02000000/iomuxc@020e0000
020ec000-020effff : /soc/aips-bus@02000000/sdma@020ec000
02184000-021841ff : /soc/aips-bus@02100000/usb@02184000
  02184000-021841ff : /soc/aips-bus@02100000/usb@02184000
02184200-021843ff : /soc/aips-bus@02100000/usb@02184200
  02184200-021843ff : /soc/aips-bus@02100000/usb@02184200
02184800-021849ff : /soc/aips-bus@02100000/usbmisc@02184800
02188000-0218bfff : /soc/aips-bus@02100000/ethernet@02188000
02198000-0219bfff : /soc/aips-bus@02100000/usdhc@02198000
021a0000-021a3fff : /soc/aips-bus@02100000/i2c@021a0000
021a4000-021a7fff : /soc/aips-bus@02100000/i2c@021a4000
021a8000-021abfff : /soc/aips-bus@02100000/i2c@021a8000
021b8000-021bbfff : /soc/aips-bus@02100000/weim@021b8000
021bc000-021bffff : /soc/aips-bus@02100000/ocotp@021bc000
021d8000-021dbfff : /soc/aips-bus@02100000/audmux@021d8000
021e8000-021ebfff : /soc/aips-bus@02100000/serial@021e8000
021f4000-021f7fff : /soc/aips-bus@02100000/serial@021f4000
02200000-02203fff : /soc/sata@02200000
10000000-4fffffff : System RAM
  10008000-10ccd08b : Kernel code
  10e00000-116775fb : Kernel data

On a side note, feel free to correct me on formatting issues in these email=
s
as I'm still learning the proper etiquette.
-Robert

> Bjorn

Re: PCI Resource Allocation

[Yinghai Lu]

On Mon, Sep 19, 2016 at 1:59 PM, Robert Jones <rjones@gateworks.com> wrote:
> [    0.312076] PCI host bridge /soc/pcie@0x01000000 ranges:
> [    0.312098]   No bus range found for /soc/pcie@0x01000000, using [bus 00-ff]
> [    0.312147]   err 0x01f00000..0x01f7ffff -> 0x01f00000
> [    0.312186]    IO 0x01f80000..0x01f8ffff -> 0x00000000
> [    0.312275]   MEM 0x01000000..0x01efffff -> 0x01000000
> [    0.521249] imx6q-pcie 1ffc000.pcie: link up
> [    0.521268] imx6q-pcie 1ffc000.pcie: Link: Gen2 disabled
> [    0.521283] imx6q-pcie 1ffc000.pcie: link up
> [    0.521296] imx6q-pcie 1ffc000.pcie: Link up, Gen1
> [    0.521901] imx6q-pcie 1ffc000.pcie: PCI host bridge to bus 0000:00
> [    0.521927] pci_bus 0000:00: root bus resource [bus 00-ff]
> [    0.521946] pci_bus 0000:00: root bus resource [??? 0x01f00000-0x01f7ffff flags 0x0]
> [    0.521962] pci_bus 0000:00: root bus resource [io  0x0000-0xffff]
> [    0.521978] pci_bus 0000:00: root bus resource [mem 0x01000000-0x01efffff]
...
> [    0.682168] pci 0000:00:00.0: BAR 0: assigned [mem 0x01000000-0x010fffff]
> [    0.682199] pci 0000:00:00.0: BAR 8: no space for [mem size 0x01400000]
> [    0.682217] pci 0000:00:00.0: BAR 8: failed to assign [mem size 0x01400000]
> [    0.682237] pci 0000:00:00.0: BAR 6: assigned [mem > 0x01100000-0x0110ffff pref]
> [    0.682257] pci 0000:00:00.0: BAR 7: assigned [io  0x1000-0x1fff]

so one of resource resource flags is not right.
> [    0.521946] pci_bus 0000:00: root bus resource [??? 0x01f00000-0x01f7ffff flags 0x0]

also need a big range, but root bus does not have enough space.

please check if you can increase resource size for hostbridge.

Thanks

Yinghai