Hi, Dan,
Thanks! I get it.
It's so lucky we have the same target.
When your patch could be accepted?
Cheers,
Wei.
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Dan Williams
> Sent: Thursday, July 12, 2007 12:57 AM
> To: Zhang Wei-r63237
> Cc: [email protected]; [email protected];
> [email protected]; [email protected];
> [email protected]; [email protected]
> Subject: Re: [PATCH 3/4] Extend the DMA-engine API.
>
> On 7/11/07, Zhang Wei-r63237 <[email protected]> wrote:
> > Hi, Dan,
> >
> > Do you mention here:
> http://marc.info/?l=linux-raid&m=118290909614463&w=2 ?
> > I see the async_tx is located at crypto/ of the above page,
> but my patch is for DMA engine in drivers/dma and for DMA
> engine driver.
> >
> > Thanks!
> > Wei.
>
> Hi Wei,
>
> I was referring to:
> http://marc.info/?l=linux-raid&m=118290909528910&w=2
>
> async_tx is an api that exploits the raw capabilities of the new
> dmaengine interface. For your case when the existing api calls do not
> provide the proper interface you can open code something like the
> following:
>
> tx = dev->device_prep_dma_<operation>(chan, len, int_flag)
> tx->tx_set_src(dma_addr_t, tx, index /* for multi-source ops */)
> tx->tx_set_dest(dma_addr_t, tx, index)
> tx->tx_submit(tx)
>
> The expectation is that the most common usages of dmaengines will use
> async_tx calls, or the 'dma_async_memcpy_foo_to_bar' helper routines.
>
> --
> Dan
>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Stuff]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
[Linux Resources]
