On Tue, 2006-08-22 at 09:22 -0500, Matt Porter wrote:
On Tue, Aug 22, 2006 at 05:11:09PM +0930, Phil Nitschke wrote:
Hi all,
I have 2 GB memory on a 7448 processor, and want to reserve a huge chunk
of it at boot-time, then ioremap() it into the kernel space inside a
device driver. So
Hi all,
I have 2 GB memory on a 7448 processor, and want to reserve a huge chunk
of it at boot-time, then ioremap() it into the kernel space inside a
device driver. So far I've succeeded with 64 MB, but can't go any
higher, as mm/vmalloc.c tells me: allocation failed: out of vmalloc
space - use
(I go no replies last week, so I'll try again, with less explanation...)
If I master a DMA from a PCI device into a main memory buffer allocated
with dma_alloc_noncoherent(), I need to synchronise the destination
buffer using dma_sync_single_range_for_xxx() before and after the DMA.
But if the
Hi,
I'm transferring data using DMA from a custom PCI device memory into
RAM. Can someone advise me on the correct buffer synchronisation
strategy for the following 3 scenarios:
Assuming I have three buffers, buf_A, and buf_B, both created using
dma_alloc_noncoherent(NULL, 32 * PAGE_SIZE, ...),
Hi guys,
I've written a DMA controller driver for the Marvell Discovery series
(particularly the MV64360, MV64460). It is still a work-in-progress and
comes with many caveats, but I'm happy to share it should anyone be
interested. Some of the caveats include:
- does not support scatter-gather
On Wed, 2006-05-24 at 13:52 -0700, Mark A. Greer wrote:
On Wed, May 24, 2006 at 11:53:54AM +0930, Phil Nitschke wrote:
On Tue, 2006-05-23 at 16:54 -0700, Mark A. Greer wrote:
You say that you don't see any PCI traffic. Does that mean you
have a PCI analyzer and that you are sure
Hi,
I'm working on a project using this processor:
http://www.artesyncp.com/products/PmPPC7448.html
on a custom VME carrier, as shown below. We're wanting to suck
large amounts of data from a PCI device which _cannot_ perform
bus-mastered DMA (it is a PCI Target only).
The Marvell Chip used by
On Tue, 2006-05-23 at 16:54 -0700, Mark A. Greer wrote:
You say that you don't see any PCI traffic. Does that mean you
have a PCI analyzer and that you are sure that its set up correctly?
I don't have a PCI analyzer, however the JTAG used to program the PCI
device has been configured to
On Mon, 2006-03-27 at 10:18 -0600, Kumar Gala wrote:
On Mar 27, 2006, at 2:02 AM, Phil Nitschke wrote:
On Thu, 2006-03-23 at 09:44 -0600, Kumar Gala wrote:
On Mar 23, 2006, at 8:21 AM, Wyse, Chris wrote:
Hi,
I'm trying to map a PCI memory region 1 into user space from my
driver
2.6.16 kernel.org kernel built for
PPC. I used the ELDK4 NFS filesystem.)
--
Phil Nitschke Phil.Nitschke at avalon.com.au
Avalon Systems Pty Ltd
Linux 2.6.16-pmppc744x (arty5) (13:01 on Tuesday, 28 March 2006)
login: root
Last login: Tue Mar 28 13:00:32 from 192.168.1.14
bash-3.00# mount
/dev
as far as the mmap() goes, because
mine is broken and yours isn't!
--
Phil Nitschke Phil.Nitschke at avalon.com.au
Avalon Systems Pty Ltd
On Thu, 2006-03-23 at 09:44 -0600, Kumar Gala wrote:
On Mar 23, 2006, at 8:21 AM, Wyse, Chris wrote:
Hi,
I'm trying to map a PCI memory region 1 into user space from my
driver (PPC440GX, Linux 2.6.10). Here's the mmap routine of the
driver that I'm using:
Why don't use the
BW == Brian Waite brian at waitefamily.us writes:
I'm now looking seriously (and reluctantly!) at writing a DMA
Controller Driver to supplement these functions, and I've started
the process of getting an NDA from Marvell, so I can get their
User Manual (and errata!).
BW You won't
On Wed, 2006-03-08 at 22:36 +, Adrian Cox wrote:
On Mon, 2006-03-06 at 14:39 +1030, Phil Nitschke wrote:
How is a DMA controlled (from a device driver writer's perspective) when
a third-party (i.e. in the bridge) DMA controller needs to do the work
to get the data from a PCI Target
MAG == Mark A Greer mgreer at mvista.com writes:
MAG On Tue, Dec 20, 2005 at 10:49:58AM +1030, Phil Nitschke wrote:
... if I wanted to suck the data into main memory using the mv64460
IDMA controller (assuming the device couldn't initiate its own
burst writes), is there a standard
ES == Eugene Surovegin ebs at ebshome.net writes:
ES On Thu, Feb 16, 2006 at 05:51:20PM +1030, Phil Nitschke wrote:
Hi,
I've been using a PCI device driver developed by a third party
company. It uses a scatter/gather DMA I/O to transfer data from
the PCI device into user
GB == Buhler, Greg greg.buhler at viasat.com writes:
GB Phil, If the third party DMA driver is not proprietary send it
GB over and I'd be happy to take a look at it for you.
I don't think I can, due to this in the code:
MAG == Mark A Greer mgreer at mvista.com writes:
MAG On Thu, Feb 16, 2006 at 05:51:20PM +1030, Phil Nitschke wrote:
The problem is, that sometimes the data is corrupt (usually on the
first transfer). We've concluded that the problem is related to
cache coherency. The Artesyn 2.6.10
Hi,
I've been using a PCI device driver developed by a third party company.
It uses a scatter/gather DMA I/O to transfer data from the PCI device
into user memory. When using a buffer size of about 1 MB, the driver
achieves a transfer bandwidth of about 60 MB/s, on a 66 MHz, 32-bit
bus.
The
MAG == Mark A Greer mgreer at mvista.com writes:
MAG Hi Phil,
MAG [Note: I'm cc'ing linuxppc-embedded for others to reference and to
MAG add their thoughts.]
OK, I've just subscribed...
MAG On Tue, Dec 20, 2005 at 10:49:58AM +1030, Phil Nitschke wrote:
Hi Mark,
I'm developing
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