Date: Mon, 3 May 2010 22:12:28 +0200 From: Rafal Jaworowski <raj@semihalf.com> To: Kristof Provost <kristof@sigsegv.be> Cc: freebsd-hackers@freebsd.org, Jakub Klama <jceel@semihalf.com> Subject: Re: GSoC: Generic DMA engine framework Message-ID: <8CE0B65C-58CE-44AA-9DF1-804F03769DD1@semihalf.com> In-Reply-To: <20100503195107.GC24372@nereid> References: <61BCAC8D-B468-41BD-9537-6DC6E5AFB834@semihalf.com> <20100503195107.GC24372@nereid>
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On 2010-05-03, at 21:51, Kristof Provost wrote: > Hi, >=20 > On 2010-04-30 19:44:45 (+0200), Jakub Klama <jceel@semihalf.com> = wrote: >> This summer I'll add generic mechanism for using general purpose=20 >> DMA engines found in embedded system-on-chip devices. This will make=20= >> possible to schedule transfers from kernel and userspace and will=20 >> allow to use DMA in other devices using systemwide DMA engine. >>=20 >> My earlier experience with kernel development was writing FreeBSD/arm=20= >> port to TI DaVinci Digital-media system-on-chip - more details here: = [1]. >> Development of this project will be done also on DaVinci - I'll = provide=20 >> implementation of its DMA engine as well as example DMA-enabled = device >> driver - DaVinci's SD/MMC controller (current implementation uses = only >> PIO transfers).=20 >>=20 >> You can read more details here: = http://wiki.freebsd.org/SOC2010JakubKlama >>=20 >> I will appreciate your comments and suggestions about this project. >=20 > This looks like a very interesting project. I'm quite interested in > seeing the idam(4) driver as I'm working on a driver for the hardware > crypto engine in the 88F5182 (and later the 88F6xxx I hope) and it'd = be > much improved by DMA support. Not sure how far you went with the crypto engine work, but be advised we = already have completed the CESA driver, only I haven't managed to commit = the code yet.. Let me know if you'd like to see / test drive this. BTW: out of curiousity, what is the platform based on 88F5281 you're = using? Rafal
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