On 8/17/07, Yeoh Chun Yeow <[EMAIL PROTECTED]> wrote:
> Dear all,
>
> I have encounter the following problem when migrating a Linux driver to RTDM
> driver:
>
> I-pipe: Detected illicit call from domain 'Xenomai'
> into a service reserved for domain 'Linux' and below.
> [<c002a474>] (show_stack+0x0/0x58) from [<c00736a4>]
> (ipipe_check_context+0x98/0xe4)
> [<c007360c>] (ipipe_check_context+0x0/0xe4) from [<c00d4ca4>]
> (cache_alloc_refill+0x7c/0x78c)
> r8 = 00000020 r7 = C04A3360 r6 = 00000000 r5 = 0000001B
> r4 = 00000000
> [<c00d4c28>] (cache_alloc_refill+0x0/0x78c) from [<c00d54dc>]
> (__kmalloc+0x128/0x138)
> [<c00d53b4>] (__kmalloc+0x0/0x138) from [<c027ede8>] (__alloc_skb+0x58/0xf8)
> r8 = 00000000 r7 = C04A8B00 r6 = 00000060 r5 = 00000020
> r4 = C065C940
> [<c027ed90>] (__alloc_skb+0x0/0xf8) from [<c0222b94>]
> (at91ether_interrupt+0x250/0x350)
> r8 = FFC00000 r7 = C0768A60 r6 = C0768B20 r5 = 00000046
> r4 = C03E4C60
>
> <snip>
>
> | # end 0x80000000 -44 __ipipe_unstall_root+0x4c
> (__ipipe_restore_root+0x70)
> | # *func -50 __ipipe_unstall_root+0x10
> (__ipipe_restore_root+0x70)
> | # *func -56 __ipipe_restore_root+0x10
> (kmem_cache_alloc+0x84)
> | # *func -63 debug_smp_processor_id+0x10
> (kmem_cache_alloc+0x50)
> | # *end 0x80000001 -70 kmem_cache_alloc+0xd8 (__alloc_skb+0x3c)
> | # begin 0x80000001 -76 kmem_cache_alloc+0xc4 (__alloc_skb+0x3c)
> | # func -83 kmem_cache_alloc+0x14 (__alloc_skb+0x3c)
> | # func -91 __alloc_skb+0x14 (at91ether_interrupt+0x250)
> | # func -100 at91ether_interrupt+0x14
> (xnintr_irq_handler+0x48)
> | # func -107 xnintr_irq_handler+0x14
> (__ipipe_dispatch_wired+0xf8)
> | +func -113 __ipipe_dispatch_wired+0x14
> (__ipipe_handle_irq+0x1b0)
> | +func -119 at91_aic_mask_irq+0x10
> (__ipipe_ack_level_irq+0x4c)
> | +func -125 at91_aic_mask_irq+0x10
> (__ipipe_ack_level_irq+0x3c)
> | +func -130 __ipipe_ack_level_irq+0x10
> (__ipipe_ack_irq+0x24)
> | +func -137 __ipipe_ack_irq+0x10
> (__ipipe_handle_irq+0x1a4)
> | +func -143 __ipipe_handle_irq+0x14
> (__ipipe_grab_irq+0xa0)
> | +begin 0xffffffff -150 __ipipe_grab_irq+0x34 (__irq_svc+0x30)
> | +func -156 __ipipe_grab_irq+0x14 (__irq_svc+0x30)
> | +end 0x80000000 -164 __ipipe_unstall_root+0x4c
> (__do_softirq+0x4c)
> | #begin 0x80000000 -171 __ipipe_unstall_root+0x70
> (__do_softirq+0x4c)
> #func -177 __ipipe_unstall_root+0x10
> (__do_softirq+0x4c)
> #func -183 debug_smp_processor_id+0x10
> (__do_softirq+0x38)
> #func -190 debug_smp_processor_id+0x10
> (__do_softirq+0x30)
> #func -196 add_preempt_count+0x10 (__do_softirq+0x2c)
>
> Is this the problem coming from the alloc_skb function call? {
Yes, you can not call alloc_skb from Xenomai domain, as you can not
call most Linux functions. Note that if you are porting a network
driver, you should consider using rtnet.
--
Gilles Chanteperdrix
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