On 30-07-18, 12:46, Peter Ujfalusi wrote:
> Vinod,
>
> On 2018-07-24 14:14, Vinod wrote:
> Clients must not mix the two way of handling the metadata.
> The set_len() is intended to tell the DMA driver the client provided
> metadata size (in MEM_TO_DEV case mostly).
>
> MEM
Vinod,
On 2018-07-24 14:14, Vinod wrote:
Clients must not mix the two way of handling the metadata.
The set_len() is intended to tell the DMA driver the client provided
metadata size (in MEM_TO_DEV case mostly).
MEM_TO_DEV flow on client side:
get_ptr()
fill in t
On 20-07-18, 16:42, Peter Ujfalusi wrote:
>
>
> On 2018-07-19 12:22, Vinod wrote:
> > Hi Peter,
> >
> > On 18-07-18, 13:06, Peter Ujfalusi wrote:
> >
> +struct dma_async_tx_descriptor;
> +
> +struct dma_descriptor_metadata_ops {
> +int (*attach)(struct dma_async_tx_d
On 2018-07-19 12:22, Vinod wrote:
> Hi Peter,
>
> On 18-07-18, 13:06, Peter Ujfalusi wrote:
>
+struct dma_async_tx_descriptor;
+
+struct dma_descriptor_metadata_ops {
+ int (*attach)(struct dma_async_tx_descriptor *desc, void *data,
+size_t len);
>>>
>
Hi Peter,
On 18-07-18, 13:06, Peter Ujfalusi wrote:
> >> +struct dma_async_tx_descriptor;
> >> +
> >> +struct dma_descriptor_metadata_ops {
> >> + int (*attach)(struct dma_async_tx_descriptor *desc, void *data,
> >> +size_t len);
> >
> > How does one detach?
>
> I have not thou
Hi Vinod,
On 2018-07-10 08:52, Vinod wrote:
>
> Hey Peter,
>
> Sorry for late response on this..
No problem, I was away myself also...
> On 01-06-18, 13:24, Peter Ujfalusi wrote:
>> If the DMA supports per descriptor metadata it can implement the attach,
>> get_ptr/set_len callbacks.
>>
>> Cli
Hey Peter,
Sorry for late response on this..
On 01-06-18, 13:24, Peter Ujfalusi wrote:
> If the DMA supports per descriptor metadata it can implement the attach,
> get_ptr/set_len callbacks.
>
> Client drivers must only use either attach or get_ptr/set_len to avoid
> miss configuration.
>
> W
org;
> dan.j.willi...@intel.com; Appana Durga Kedareswara Rao
> ; linux-arm-ker...@lists.infradead.org
> Subject: [RFC] dmaengine: Add metadat_ops for dma_async_tx_descriptor
>
> If the DMA supports per descriptor metadata it can implement the attach,
> get_ptr/set_len callbacks.
>
If the DMA supports per descriptor metadata it can implement the attach,
get_ptr/set_len callbacks.
Client drivers must only use either attach or get_ptr/set_len to avoid
miss configuration.
Wrappers are also added for the metadata_ops:
dmaengine_desc_attach_metadata()
dmaengine_desc_get_metadata
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