17.09.2013, в 23:33, Alex Ivanov <gnidorah@xxxxxxxxx> написал(а):
> 17.09.2013, в 18:24, Alex Deucher <alexdeucher@xxxxxxxxx> написал(а):
>
>> On Tue, Sep 17, 2013 at 5:23 AM, Alex Ivanov <gnidorah@xxxxxxxxx> wrote:
>>> Alex,
>>>
>>> 10.09.2013, в 16:37, Alex Deucher <alexdeucher@xxxxxxxxx> написал(а):
>>>
>>>> The dummy page isn't really going to help much. That page is just
>>>> used as a safety placeholder for gart entries that aren't mapped on
>>>> the GPU. TTM (drivers/gpu/drm/ttm) actually does the allocation of
>>>> the backing pages for the gart.
>>>
>>>> You may want to look there.
>>>
>>> Ah, sorry. Indeed. Though, my idea with:
>>>
>>> On Tue, Sep 10, 2013 at 5:20 AM, Alex Ivanov <gnidorah@xxxxxxxxx> wrote:
>>>
>>>> Thanks! I'll try. Meanwhile i've tried a switch from page_alloc() to
>>>> dma_alloc_coherent() in radeon_dummy_page_*(), which didn't help :(
>>>
>>> doesn't make a sense at TTM part as well.
>>
>> After the driver is loaded, you can dump some info from debugfs:
>> r100_rbbm_info
>> r100_cp_ring_info
>> r100_cp_csq_fifo
>> Which will dump a bunch of registers and internal fifos so we can see
>> that the chip actually processed.
>>
>> Alex
>
> Reading of r100_cp_ring_info leads to a KP:
>
> r100_debugfs_cp_ring_info():
> count = (rdp + ring->ring_size - wdp) & ring->ptr_mask;
> i = (rdp + j) & ring->ptr_mask;
>
> for (j = 0; j <= count; j++) {
> i = (rdp + j) & ring->ptr_mask;
> --> Here at first iteration <--
> --> count = 262080, i = 0 <--
> seq_printf(m, "r[%04d]=0x%08x\n", i, ring->ring[i]);
> }
>
> Reading of radeon_ring_gfx (which i've additionally tried to read)
> throws an MCE:
>
> radeon_debugfs_ring_info():
> count = (ring->ring_size / 4) - ring->ring_free_dw;
> i = (ring->rptr + ring->ptr_mask + 1 - 32) & ring->ptr_mask;
>
> for (j = 0; j <= (count + 32); j++) {
> --> Here at first iteration <--
> --> count = 64, i = 262112 <--
> seq_printf(m, "r[%5d]=0x%08x\n", i, ring->ring[i]);
> i = (i + 1) & ring->ptr_mask;
> }
>
> I'm attaching debug outputs on kernel built with these loops commented.
> <drm_parisc_debug.tgz>_______________________________________________
> dri-devel mailing list
> dri-devel@xxxxxxxxxxxxxxxxxxxxx
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
The ring->ring is NULL...
_______________________________________________
dri-devel mailing list
dri-devel@xxxxxxxxxxxxxxxxxxxxx
http://lists.freedesktop.org/mailman/listinfo/dri-devel
