On Wed, Jul 01, 2009 at 11:08:31PM +0400, Andrey Gusev wrote:
Hello!
I tried 2.6.31-rc1 and found trace in dmesg.
[0.00] NR_IRQS:512
[0.00] [ cut here ]
[0.00] Badness at mm/bootmem.c:535
[0.00] NIP: c043d2d0 LR: c043d29c CTR:
On Thu, Jun 18, 2009 at 03:53:45PM -0700, Ira Snyder wrote:
Use the DMA_SLAVE capability of the DMAEngine API to copy/from a
scatterlist into an arbitrary list of hardware address/length pairs.
This allows a single DMA transaction to copy data from several different
devices
When using the Freescale DMA controller in external control mode, both the
request count and external pause bits need to be setup correctly. This was
being done with the same function.
The 83xx controller lacks the external pause feature, but has a similar
feature called external start. This
Use the DMA_SLAVE capability of the DMAEngine API to copy/from a
scatterlist into an arbitrary list of hardware address/length pairs.
This allows a single DMA transaction to copy data from several different
devices into a scatterlist at the same time.
This also adds support to enable some
On Thu, Jun 18, 2009 at 11:16:03AM -0700, Dan Williams wrote:
Ira Snyder wrote:
I can do something similar by calling device_prep_dma_memcpy() lots of
times. Once for each page in the scatterlist.
This has the advantage of not changing the DMAEngine API.
This has the disadvantage
Use the DMA_SLAVE capability of the DMAEngine API to copy/from a
scatterlist into an arbitrary list of hardware address/length pairs.
This allows a single DMA transaction to copy data from several different
devices into a scatterlist at the same time.
This also adds support to enable some
On Wed, Jun 17, 2009 at 10:17:54AM -0700, Dan Williams wrote:
Ira Snyder wrote:
Using EXPORT_SYMBOL would defeat the purpose of conforming to the
dmaengine api which should allow other subsystems to generically
discover an fsldma resource.
Any driver would still use dma_request_channel
On Tue, Jun 16, 2009 at 12:01:40PM -0700, Dan Williams wrote:
Hi Ira,
Ira Snyder wrote:
Use the DMA_SLAVE capability of the DMAEngine API to copy/from a
scatterlist into an arbitrary list of hardware address/length pairs.
This allows a single DMA transaction to copy data from several
On Wed, Jun 10, 2009 at 09:45:26PM -0500, Kumar Gala wrote:
On Apr 27, 2009, at 3:49 PM, Dan Williams wrote:
On Mon, Apr 27, 2009 at 1:47 PM, Timur Tabi ti...@freescale.com
wrote:
Adding Kumar to the CC: list, since he might pick up the patch.
Acked-by: Dan Williams
On Thu, Jun 04, 2009 at 07:20:26PM +0800, Li Yang-R58472 wrote:
This is a request for comments on this patch. I hunch it is
not quite
ready for inclusion, though it is certainly ready for
review. Correct
functioning of this patch depends on the patches submitted earlier.
As
On Fri, May 15, 2009 at 03:56:59PM -0700, Ira Snyder wrote:
Use the DMA_SLAVE capability of the DMAEngine API to copy/from a
scatterlist into an arbitrary list of hardware address/length pairs.
This allows a single DMA transaction to copy data from several different
devices
When using the DMA controller from multiple threads at the same time, it is
possible to get lots of DMA halt timeout! errors printed to the kernel
log.
This occurs due to a race between fsl_dma_memcpy_issue_pending() and the
interrupt handler, fsl_dma_chan_do_interrupt(). Both call the
On the 83xx controller, snooping is necessary for the DMA controller to
ensure cache coherence with the CPU when transferring to/from RAM.
The last descriptor in a chain will always have the End-of-Chain interrupt
bit set, so we can set the snoop bit while adding the End-of-Chain
interrupt bit.
When creating a DMA transaction with multiple descriptors, the async_tx
cookie is set to 0 for each descriptor in the chain, excluding the last
descriptor, whose cookie is set to -EBUSY.
When fsl_dma_tx_submit() is run, it only assigns a cookie to the first
descriptor. All of the remaining
Use the DMA_SLAVE capability of the DMAEngine API to copy/from a
scatterlist into an arbitrary list of hardware address/length pairs.
This allows a single DMA transaction to copy data from several different
devices into a scatterlist at the same time.
This also adds support to enable some
Hello all.
I'm working on a driver for a custom board (based heavily on the
MPC8349EMDS board) to dump data out of onboard FPGA's. I need to use the
onboard DMA controller for this, mostly due to data transfer rate and
timing requirements.
Of course, I'd like to play nice with the existing Linux
On Thu, May 14, 2009 at 09:27:17AM -0700, Dan Williams wrote:
On Thu, 2009-05-14 at 09:13 -0700, Ira Snyder wrote:
Hello all.
I'm working on a driver for a custom board (based heavily on the
MPC8349EMDS board) to dump data out of onboard FPGA's. I need to use the
onboard DMA controller
On Mon, Apr 27, 2009 at 03:26:36PM -0500, Timur Tabi wrote:
David Hawkins wrote:
PRC_RM - PCI read multiple
The default PCI read command used by the DMA controller is
PCI Read (PCI command 6h). When the burst length is 32-bytes
or longer, PCI Read Line (PCI command Eh) is used
By default, the Freescale 83xx DMA controller uses the PCI Read Line
command when reading data over the PCI bus. Setting the controller to use
the PCI Read Multiple command instead allows the controller to read much
larger bursts of data, which provides a drastic speed increase.
The slowdown due
On Tue, Apr 14, 2009 at 02:28:26PM -0600, Grant Likely wrote:
On Mon, Feb 23, 2009 at 6:00 PM, Ira Snyder i...@ovro.caltech.edu wrote:
This adds support to Linux for using virtio between two computers linked by
a PCI interface. This allows the use of virtio_net to create a familiar,
fast
On Thu, Feb 26, 2009 at 05:15:27PM +0100, Arnd Bergmann wrote:
On Tuesday 24 February 2009, Ira Snyder wrote:
This adds support to Linux for using virtio between two computers linked by
a PCI interface. This allows the use of virtio_net to create a familiar,
fast interface for communication
On Thu, Feb 26, 2009 at 05:53:56PM +0100, Geert Uytterhoeven wrote:
On Thu, 26 Feb 2009, Arnd Bergmann wrote:
On Tuesday 24 February 2009, Ira Snyder wrote:
+/* Virtio-over-PCI descriptors: 12 bytes. These can chain together via
next */
+struct vop_desc {
+ /* Address (host
On Thu, Feb 26, 2009 at 09:37:14PM +0100, Arnd Bergmann wrote:
On Thursday 26 February 2009, Ira Snyder wrote:
On Thu, Feb 26, 2009 at 05:15:27PM +0100, Arnd Bergmann wrote:
I think so too. I was just getting something working, and thought it
would be better to have it out there rather
On Thu, Feb 26, 2009 at 11:34:33PM +0100, Arnd Bergmann wrote:
On Thursday 26 February 2009, Ira Snyder wrote:
On Thu, Feb 26, 2009 at 09:37:14PM +0100, Arnd Bergmann wrote:
The registers are part of the board control registers. They don't fit at
all in the message unit. Doing
On Tue, Feb 24, 2009 at 10:31:37AM +1100, Dushara Jayasinghe wrote:
Hi,
I'm working on the kernel version Linux-2.6.29-rc5 with U-Boot
1.2.0-g88e21e7b-dirty.
Does the flash node HAVE to be within a localbus node or can it reside within
the soc node? I've been basing my work on
On Fri, Feb 20, 2009 at 12:57:36PM -0600, Matt Sealey wrote:
Hi guys,
What's the correct way to read from PCI address space (basically it's
guaranteed to be non-coherent memory bar) without flipping bits like
ioread32() does?
I need to be able to copy a bank of registers from PCI address
On Fri, Feb 20, 2009 at 02:05:08PM -0600, Matt Sealey wrote:
On Fri, Feb 20, 2009 at 1:11 PM, Ira Snyder i...@ovro.caltech.edu wrote:
On Fri, Feb 20, 2009 at 12:57:36PM -0600, Matt Sealey wrote:
I'm pretty sure memcpy_fromio() and memcpy_toio() will get you what you
want. They don't
On Fri, Feb 20, 2009 at 03:56:39PM -0600, Matt Sealey wrote:
On Fri, Feb 20, 2009 at 3:07 PM, Ira Snyder i...@ovro.caltech.edu wrote:
On Fri, Feb 20, 2009 at 02:05:08PM -0600, Matt Sealey wrote:
On Fri, Feb 20, 2009 at 1:11 PM, Ira Snyder i...@ovro.caltech.edu wrote:
On Fri, Feb 20, 2009
On Thu, Feb 19, 2009 at 02:10:08PM +0800, Zang Roy-R61911 wrote:
-Original Message-
From:
linuxppc-dev-bounces+tie-fei.zang=freescale@ozlabs.org
[mailto:linuxppc-dev-bounces+tie-fei.zang=freescale@ozlabs
.org] On Behalf Of Ira Snyder
Sent: Wednesday, February 18
On Thu, Feb 19, 2009 at 09:48:04PM +1030, Rusty Russell wrote:
On Thursday 19 February 2009 03:08:35 Ira Snyder wrote:
On Wed, Feb 18, 2009 at 05:13:03PM +1030, Rusty Russell wrote:
don't restrict yourself to 32 feature bits (only PCI does this, and
they're
going to have to hack when
Of Kumar Gala
Sent: Thursday, February 19, 2009 0:47 AM
To: Ira Snyder
Cc: Arnd Bergmann; Jan-Bernd Themann; net...@vger.kernel.org;
Rusty Russell; linux-ker...@vger.kernel.org; linuxppc-dev@ozlabs.org
Subject: Re: [RFC v1] virtio: add virtio-over-PCI driver
On Feb 17, 2009, at 4:24 PM, Ira
On Wed, Feb 18, 2009 at 05:13:03PM +1030, Rusty Russell wrote:
On Wednesday 18 February 2009 08:54:25 Ira Snyder wrote:
This adds support to Linux for using virtio between two computers linked by
a PCI interface. This allows the use of virtio_net to create a familiar,
fast interface
On Tue, Feb 10, 2009 at 07:39:47AM -0500, Scott Coulter wrote:
Hi all,
Maybe a silly questions, but what is the suggested way for handling a
processor which has a PCIe interface, but the interface is not
configured to be the root complex (endpoint only)?
Should the PCIe interface appear
On Thu, Jan 15, 2009 at 01:58:33PM +0100, Arnd Bergmann wrote:
On Thursday 15 January 2009, Ira Snyder wrote:
The only problem with that is that you cannot route interrupts from the
DMA controller over PCI with the PowerPC core running. Which makes it
mostly useless for this case
On Thu, Jan 15, 2009 at 06:53:51PM +0100, Arnd Bergmann wrote:
On Thursday 15 January 2009, Ira Snyder wrote:
These are PCI boards, not PCIe. The host computers are all Pentium3-M
systems. I tried enabling MSI on the Freescale boards in the driver, by
calling pci_enable_msi() during
On Thu, Jan 15, 2009 at 06:53:51PM +0100, Arnd Bergmann wrote:
On Thursday 15 January 2009, Ira Snyder wrote:
These are PCI boards, not PCIe. The host computers are all Pentium3-M
systems. I tried enabling MSI on the Freescale boards in the driver, by
calling pci_enable_msi() during
On Thu, Jan 15, 2009 at 10:22:53PM +0100, Arnd Bergmann wrote:
On Thursday 15 January 2009, Ira Snyder wrote:
I have another question for you Arnd.
What did you use as the host and guest drivers when you ran virtio over
PCI? Did you use two unmodified instances of virtio_net (one on host
On Thu, Jan 15, 2009 at 09:57:41PM +0100, Arnd Bergmann wrote:
On Thursday 15 January 2009, Ira Snyder wrote:
Some sort of Broadcom chipset, I think. Full dmesg and lspci output are
appended.
The PCI bridge does mention MSI, so maybe it does support it. Would
using the DMA from
On Thu, Jan 15, 2009 at 11:53:24PM +0100, Arnd Bergmann wrote:
On Thursday 15 January 2009, Ira Snyder wrote:
I do have mailboxes (two inbound, two outbound) which can generate
interrupts, as well as doorbell registers (one inbound, one outbound).
The doorbell register's bits are write 1
On Tue, Jan 13, 2009 at 06:42:53PM +0100, Arnd Bergmann wrote:
On Tuesday 13 January 2009, Ira Snyder wrote:
So do you program one channel of the DMA engine from the host side and
another channel from the guest side?
Yes.
I tried to avoid having the host program the DMA controller
On Thu, Jan 08, 2009 at 11:16:10AM -0800, David Miller wrote:
From: Ira Snyder i...@ovro.caltech.edu
Date: Wed, 7 Jan 2009 11:50:52 -0800
This adds support to Linux for a virtual ethernet interface which uses the
PCI bus as its transport mechanism. It creates a simple, familiar, and fast
On Thu, Jan 08, 2009 at 11:27:16AM -0800, Ira Snyder wrote:
On Thu, Jan 08, 2009 at 11:16:10AM -0800, David Miller wrote:
From: Ira Snyder i...@ovro.caltech.edu
Date: Wed, 7 Jan 2009 11:50:52 -0800
This adds support to Linux for a virtual ethernet interface which uses the
PCI bus
On Thu, Dec 11, 2008 at 10:04:28PM +1100, Benjamin Herrenschmidt wrote:
On Wed, 2008-12-10 at 16:17 -0800, Ira Snyder wrote:
On Wed, Dec 10, 2008 at 05:29:53PM -0600, Ayman El-Khashab wrote:
My system consists of a pair of 460EXs attached by way of both PCI-E and
PCI. Ultimately my goal
On Wed, Dec 10, 2008 at 05:29:53PM -0600, Ayman El-Khashab wrote:
My system consists of a pair of 460EXs attached by way of both PCI-E and
PCI. Ultimately my goal is to communicate between them via pci-e (is
there anything out there that does this already?).
I can't help you with that exact
On Fri, Nov 28, 2008 at 03:04:04PM +0100, Hommel, Thomas (GE EntSol,
Intelligent Platforms) wrote:
Hi all,
I'm currently developing a driver and want to make use of the DMA
offload engine. Data has to be transferred from memory to a device on
the local bus and vice versa.
At a first look,
On Wed, Nov 05, 2008 at 02:19:52PM +0100, Arnd Bergmann wrote:
On Tuesday 04 November 2008, Ira Snyder wrote:
So, since interrupts are disabled while my interrupt handler is running,
I think I should be able to use spin_lock() and spin_unlock(), correct?
yes.
But sparse gives me
On Wed, Nov 05, 2008 at 02:50:59PM +0100, Arnd Bergmann wrote:
On Tuesday 04 November 2008, Ira Snyder wrote:
On Tue, Nov 04, 2008 at 09:23:03PM +0100, Arnd Bergmann wrote:
On Tuesday 04 November 2008, Ira Snyder wrote:
I don't really know how to do that. I got a warning here from sparse
On Wed, Nov 05, 2008 at 01:22:25PM -0800, Ira Snyder wrote:
Despite my best efforts at testing this version, a bug slipped past.
There is some problem with this driver, nfsroot, and Linux routing. If
you do not apply the fix below, udp packets sent by the nfsroot code
have corrupted checksums
On Tue, Nov 04, 2008 at 01:09:25PM +0100, Arnd Bergmann wrote:
On Wednesday 29 October 2008, Ira Snyder wrote:
This adds support to Linux for a virtual ethernet interface which uses the
PCI bus as its transport mechanism. It creates a simple, familiar, and fast
method of communication
On Tue, Nov 04, 2008 at 09:23:03PM +0100, Arnd Bergmann wrote:
On Tuesday 04 November 2008, Ira Snyder wrote:
On Tue, Nov 04, 2008 at 01:09:25PM +0100, Arnd Bergmann wrote:
Why 'depends on !PCI'? This means that you cannot build a kernel that
is able to run both as host and endpoint
On Tue, Nov 04, 2008 at 09:23:03PM +0100, Arnd Bergmann wrote:
Big snip.
I tried to make the locking do only what was needed. I just couldn't get
it correct unless I used spin_lock_irqsave(). I was able to get the
system to deadlock otherwise. This is why I posted the driver for
On Wed, Oct 29, 2008 at 01:25:06PM -0700, Stephen Hemminger wrote:
On Wed, 29 Oct 2008 13:20:27 -0700
Ira Snyder [EMAIL PROTECTED] wrote:
Big snip...
diff --git a/drivers/net/pcinet.h b/drivers/net/pcinet.h
new file mode 100644
index 000..66d2cba
--- /dev/null
+++ b/drivers/net
On Wed, Oct 29, 2008 at 03:54:46PM -0500, Scott Wood wrote:
Ira Snyder wrote:
I know about this. I was following the example set forth in
drivers/net/fs_enet.
I recommend against that. :-)
Great, now you tell me :)
I'll go ahead change the typedef to a struct. Hopefully some of the
other
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