From: Alexey Kardashevskiy <aik@ozlabs.ru>
To: Christoph Hellwig <hch@lst.de>
Cc: Daniel Borkmann <daniel@iogearbox.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
iommu@lists.linux-foundation.org,
Jesper Dangaard Brouer <brouer@redhat.com>,
Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH 4/5] dma-mapping: add a dma_ops_bypass flag to struct device
Date: Tue, 14 Jul 2020 17:12:42 +1000 [thread overview]
Message-ID: <4883e908-2e8d-6c13-6e28-154aa8ab3a78@ozlabs.ru> (raw)
In-Reply-To: <20200714070757.GA776@lst.de>
On 14/07/2020 17:07, Christoph Hellwig wrote:
> On Mon, Jul 13, 2020 at 02:59:39PM +1000, Alexey Kardashevskiy wrote:
>>
>>
>> On 09/07/2020 01:24, Christoph Hellwig wrote:
>>> Several IOMMU drivers have a bypass mode where they can use a direct
>>> mapping if the devices DMA mask is large enough. Add generic support
>>> to the core dma-mapping code to do that to switch those drivers to
>>> a common solution.
>>>
>>> Signed-off-by: Christoph Hellwig <hch@lst.de>
>>> ---
>>> include/linux/device.h | 8 +++++
>>> kernel/dma/Kconfig | 8 +++++
>>> kernel/dma/mapping.c | 74 +++++++++++++++++++++++++++++-------------
>>> 3 files changed, 68 insertions(+), 22 deletions(-)
>>>
>>> diff --git a/include/linux/device.h b/include/linux/device.h
>>> index 4c4af98321ebd6..1f71acf37f78d7 100644
>>> --- a/include/linux/device.h
>>> +++ b/include/linux/device.h
>>> @@ -523,6 +523,11 @@ struct dev_links_info {
>>> * sync_state() callback.
>>> * @dma_coherent: this particular device is dma coherent, even if the
>>> * architecture supports non-coherent devices.
>>> + * @dma_ops_bypass: If set to %true then the dma_ops are bypassed for the
>>> + * streaming DMA operations (->map_* / ->unmap_* / ->sync_*),
>>> + * and optionall (if the coherent mask is large enough) also
>>
>>
>> s/optionall/optional/g
>>
>> Otherwise the series looks good and works well on powernv and pseries.
>> Thanks,
>
> Can you give a formal ACK?
It did never matter before but sure :)
Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
or you want me to reply to individual patches? Thanks,
--
Alexey
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next prev parent reply other threads:[~2020-07-14 7:38 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-08 15:24 generic DMA bypass flag v4 Christoph Hellwig
2020-07-08 15:24 ` [PATCH 1/5] dma-mapping: move the remaining DMA API calls out of line Christoph Hellwig
2020-07-08 15:24 ` [PATCH 2/5] dma-mapping: inline the fast path dma-direct calls Christoph Hellwig
2020-07-08 15:24 ` [PATCH 3/5] dma-mapping: make support for dma ops optional Christoph Hellwig
2020-07-18 17:17 ` Guenter Roeck
2020-07-20 6:20 ` Christoph Hellwig
2020-07-08 15:24 ` [PATCH 4/5] dma-mapping: add a dma_ops_bypass flag to struct device Christoph Hellwig
2020-07-13 4:59 ` Alexey Kardashevskiy
2020-07-14 7:07 ` Christoph Hellwig
2020-07-14 7:12 ` Alexey Kardashevskiy [this message]
2020-07-08 15:24 ` [PATCH 5/5] powerpc: use the generic dma_ops_bypass mode Christoph Hellwig
2020-08-30 9:04 ` Cédric Le Goater
2020-08-31 6:40 ` Christoph Hellwig
2020-08-31 7:19 ` Cédric Le Goater
2020-09-05 15:45 ` Alexey Kardashevskiy
2020-07-10 13:26 ` generic DMA bypass flag v4 Jesper Dangaard Brouer
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