[Xenomai] arch arm no pci irq

[Xenomai] arch arm no pci irq

[Hänel-Baas, Alexander]

Hi

I have the kernel 3.14.17 with xenomai 2.6.4 and my own pci-fpga card that generates interrupts.

When i registry my pci irq with rt_intr_create() than i get the following warning and no irq was fired.

The same configuration under x86 arch works fine.

Dmesg output:
sm36500001: ioctl(SM36500001_IOCGIRQ) =  385 <- this is the irq number that i get after i called pci_enable_msi() in the driver
------------[ cut here ]------------
WARNING: CPU: 0 PID: 766 at arch/arm/kernel/ipipe.c:158 ipipe_set_irq_affinity+0xa0/0xe0()
Modules linked in: g3k_036500001(O) g3k_shm(O) udlfb fb_sys_fops cp210x usbserial usb_f_eem g_ether usb_f_rndis u_ether libcomposite configfs evbug
CPU: 0 PID: 766 Comm: g3t_t_TestPci Tainted: G           O 3.14.17 #1
Backtrace:
[<80012f94>] (dump_backtrace) from [<80013130>] (show_stack+0x18/0x1c) r6:0000009e r5:00000009 r4:00000000 r3:00000000
[<80013118>] (show_stack) from [<80619cc4>] (dump_stack+0x78/0x94)
[<80619c4c>] (dump_stack) from [<80025764>] (warn_slowpath_common+0x6c/0x90) r4:00000000 r3:bf7c1b3c
[<800256f8>] (warn_slowpath_common) from [<800257ac>] (warn_slowpath_null+0x24/0x2c) r8:c09c2008 r7:00000000 r6:80888970 r5:c09c2000 r4:808bb4fb
[<80025788>] (warn_slowpath_null) from [<8001ae64>] (ipipe_set_irq_affinity+0xa0/0xe0)
[<8001adc4>] (ipipe_set_irq_affinity) from [<8009be70>] (xnintr_attach+0x34/0x2f0) r4:8088e500
[<8009be3c>] (xnintr_attach) from [<800e4318>] (rt_intr_create+0x23c/0x408) r10:8088e500 r9:00000000 r8:c09c20d0 r7:00000000 r6:80888970 r5:c09c2000 r4:8088e500
[<800e40dc>] (rt_intr_create) from [<800cb51c>] (__rt_intr_create+0xa4/0x12c) r10:bf3e7080 r9:00000181 r8:beb4a000 r7:c09c2000 r6:00000000 r5:00000000 r4:beb4bfb0
[<800cb478>] (__rt_intr_create) from [<800b4464>] (hisyscall_event+0x194/0x384) r10:80982730 r9:00000000 r8:beb4bfb0 r7:80980208 r6:00000000 r5:bf3e7080 r4:8094dec0
[<800b42d0>] (hisyscall_event) from [<8008b338>] (ipipe_syscall_hook+0x64/0x6c) r10:808847a4 r9:8087699c r8:80888970 r7:8094dec0 r6:8095e900 r5:00000000 r4:00001198
[<8008b2d4>] (ipipe_syscall_hook) from [<8008a078>] (__ipipe_notify_syscall+0x124/0x23c) r5:0000119c r4:bf7c1b3c
[<80089f54>] (__ipipe_notify_syscall) from [<8000f8e0>] (pipeline_syscall+0x8/0x24) r10:00000000 r9:beb4a000 r8:8000f988 r7:000f0042 r6:00000181 r5:00000000 r4:00000000
---[ end trace a798983a93a8fa82 ]---

Any idias what is going wrong?

regards
Alexander

Re: [Xenomai] arch arm no pci irq

[Gilles Chanteperdrix]

On Thu, Jan 15, 2015 at 11:09:11AM +0000, Hänel-Baas, Alexander wrote:
> Hi
> 
> I have the kernel 3.14.17 with xenomai 2.6.4 and my own pci-fpga card that generates interrupts.
> 
> When i registry my pci irq with rt_intr_create() than i get the following warning and no irq was fired.
> 
> The same configuration under x86 arch works fine.
> 
> Dmesg output:
> sm36500001: ioctl(SM36500001_IOCGIRQ) =  385 <- this is the irq number that i get after i called pci_enable_msi() in the driver
> ------------[ cut here ]------------
> WARNING: CPU: 0 PID: 766 at arch/arm/kernel/ipipe.c:158 ipipe_set_irq_affinity+0xa0/0xe0()

You are running an SMP kernel, is this really what you want ? (note
that this is unrelated to the problem you have).

> (...)
> 
> Any idias what is going wrong?

Does it work if you call rt_intr_enable after rt_intr_create ? 
If no, does it work if you call request_irq for the same interrupt ? 
If yes, does it work work if you use the I-pipe kernel from the
for-ipipe-3.14 branch of the ipipe-gch git repository ?

-- 
					    Gilles.