Hi
Am 04.09.24 um 08:43 schrieb Alexander Stein:
Hi Linus,
Am Mittwoch, 4. September 2024, 08:36:46 CEST schrieb Linus Walleij:
On Wed, Sep 4, 2024 at 8:09 AM Alexander Stein
<alexander.stein@xxxxxxxxxxxxxxx> wrote:
Can you please check in which memory zone this VRAM is located. In my case
it's important CMA is located in Normal zone to trigger this problem.
dmesg says this:
Reserved memory: created DMA memory pool at 0x18000000, size 8 MiB
OF: reserved mem: initialized node vram@18000000, compatible id shared-dma-pool
OF: reserved mem: 0x18000000..0x187fffff (8192 KiB) nomap non-reusable
vram@18000000
cma: Reserved 16 MiB at 0xef000000 on node -1
Zone ranges:
Normal [mem 0x0000000080000000-0x00000000efffffff]
Movable zone start for each node
Early memory node ranges
node 0: [mem 0x0000000080000000-0x00000000efffffff]
Initmem setup node 0 [mem 0x0000000080000000-0x00000000efffffff]
percpu: Embedded 15 pages/cpu s39052 r0 d22388 u61440
So at the top of the normal zone at 0xef000000 as I read it.
Okay, so it is the same as for me. It seems you don't have any HighMem.
On a different model having more memory there is also HighMem available:
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000010000000-0x000000003fffffff]
[ 0.000000] HighMem [mem 0x0000000040000000-0x000000004fffffff]
IIRC vram needs to be located in HighMem for the code to work. What is
the difference between these zones?
Best regards
Thomas
If I explicitly configure CMA in HighMem I don't have any issues.
But the 512MiB models don't have enough memory for fixed allocation in HighMem.
I was about to send a revert myself as I didn't get any feedback yet.
Best regards,
Alexander
--
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)
