Re: [RFC PATCH 0/2] Introduce interface for default DMA pool

[Szemző András]

> On 2017. Jul 17., at 10:58, Vladimir Murzin  wrote:
> 
> Hi,
> 
> This is follow-up for Christoph complain of overloading the current
> dma coherent infrastructure with the global pool. To address that I
> implemented Robin's idea of the new interface to the global pool and
> wire up it with (only existent user) ARM NOMMU.  Since I have not
> heard from Vitaly and/or George of their use of global pool, I'm
> leaving ARM MMU part to them.
> 
> [1] https://lkml.org/lkml/2017/7/7/370
> 


I’ve tested the patches on Atmel SAMV7 SoC, and it works for me
without any issues, so you can add my Tested-by.

Thanks for the patches!


Booting Linux on physical CPU 0x0
Linux version 4.13.0-rc1 (root@devel) (gcc version 4.9.2 ( 4.9.2-10)) #3 Wed 
Jul 19 04:48:18 EDT 2017
CPU: ARMv7-M [410fc271] revision 1 (ARMv7M), cr=
CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
OF: fdt: Machine model: SAME70-sampione board
...
Reserved memory: created DMA memory pool at 0x73e0, size 2 MiB
OF: reserved mem: initialized node linux,dma, compatible id shared-dma-pool
Using ARMv7 PMSA Compliant MPU. Region independence: No, Used 4 of 16 regions
...
DMA: default coherent area is set
...

Re: [RFC PATCH 0/2] Introduce interface for default DMA pool

[Szemző András]

> On 2017. Jul 17., at 10:58, Vladimir Murzin  wrote:
> 
> Hi,
> 
> This is follow-up for Christoph complain of overloading the current
> dma coherent infrastructure with the global pool. To address that I
> implemented Robin's idea of the new interface to the global pool and
> wire up it with (only existent user) ARM NOMMU.  Since I have not
> heard from Vitaly and/or George of their use of global pool, I'm
> leaving ARM MMU part to them.
> 
> [1] https://lkml.org/lkml/2017/7/7/370
> 


I’ve tested the patches on Atmel SAMV7 SoC, and it works for me
without any issues, so you can add my Tested-by.

Thanks for the patches!


Booting Linux on physical CPU 0x0
Linux version 4.13.0-rc1 (root@devel) (gcc version 4.9.2 ( 4.9.2-10)) #3 Wed 
Jul 19 04:48:18 EDT 2017
CPU: ARMv7-M [410fc271] revision 1 (ARMv7M), cr=
CPU: PIPT / VIPT nonaliasing data cache, PIPT instruction cache
OF: fdt: Machine model: SAME70-sampione board
...
Reserved memory: created DMA memory pool at 0x73e0, size 2 MiB
OF: reserved mem: initialized node linux,dma, compatible id shared-dma-pool
Using ARMv7 PMSA Compliant MPU. Region independence: No, Used 4 of 16 regions
...
DMA: default coherent area is set
...

[RFC PATCH 0/2] Introduce interface for default DMA pool

[Vladimir Murzin]

Hi,

This is follow-up for Christoph complain of overloading the current
dma coherent infrastructure with the global pool. To address that I
implemented Robin's idea of the new interface to the global pool and
wire up it with (only existent user) ARM NOMMU.  Since I have not
heard from Vitaly and/or George of their use of global pool, I'm
leaving ARM MMU part to them.

[1] https://lkml.org/lkml/2017/7/7/370

Vladimir Murzin (2):
  drivers: dma-coherent: Introduce interface for default DMA pool
  ARM: NOMMU: Wire-up default DMA interface

 arch/arm/mm/dma-mapping-nommu.c |  45 +---
 drivers/base/dma-coherent.c | 159 ++--
 include/linux/dma-mapping.h |  24 ++
 3 files changed, 166 insertions(+), 62 deletions(-)

-- 
2.0.0

[RFC PATCH 0/2] Introduce interface for default DMA pool

[Vladimir Murzin]

Hi,

This is follow-up for Christoph complain of overloading the current
dma coherent infrastructure with the global pool. To address that I
implemented Robin's idea of the new interface to the global pool and
wire up it with (only existent user) ARM NOMMU.  Since I have not
heard from Vitaly and/or George of their use of global pool, I'm
leaving ARM MMU part to them.

[1] https://lkml.org/lkml/2017/7/7/370

Vladimir Murzin (2):
  drivers: dma-coherent: Introduce interface for default DMA pool
  ARM: NOMMU: Wire-up default DMA interface

 arch/arm/mm/dma-mapping-nommu.c |  45 +---
 drivers/base/dma-coherent.c | 159 ++--
 include/linux/dma-mapping.h |  24 ++
 3 files changed, 166 insertions(+), 62 deletions(-)

-- 
2.0.0