Commit Graph

73 Commits

Author SHA1 Message Date
David Moore bcee893c6c firewire: fw-ohci: Bug fixes for packet-per-buffer support
This patch corrects a number of bugs in the current OHCI 1.0
packet-per-buffer support:

1. Correctly deal with payloads that cross a page boundary.  The
previous version would not split the descriptor at such a boundary,
potentially corrupting unrelated memory.

2. Allow user-space to specify multiple packets per struct
fw_cdev_iso_packet in the same way that dual-buffer allows.  This is
signaled by header_length being a multiple of header_size.  This
multiple determines the number of packets.  The payload size allocated
per packet is determined by dividing the total payload size by the
number of packets.

3. Make sync support work properly for packet-per-buffer.

I have tested this patch with libdc1394 by forcing my OHCI 1.1
controller to use the packet-per-buffer support instead of dual-buffer.

I would greatly appreciate testing by those who have a DV devices and
other types of iso streamers to make sure I didn't cause any
regressions.

Stefan, with this patch, I'm hoping that libdc1394 will work with all
your OHCI 1.0 controllers now.

The one bit of future work that remains for packet-per-buffer support is
the automatic compaction of short payloads that I discussed with
Kristian.

Signed-off-by: David Moore <dcm@acm.org>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2008-01-30 22:22:23 +01:00
David Moore 0642b6577f firewire: fw-ohci: Fix for dualbuffer three-or-more buffers
This patch fixes the problem where different OHCI 1.1 controllers behave
differently when a received iso packet straddles three or more buffers
when using the dual-buffer receive mode.  Two changes are made in order
to handle this situation:

1. The packet sync DMA descriptor is given a non-zero header length and
non-zero payload length.  This is because zero-payload descriptors are
not discussed in the OHCI 1.1 specs and their behavior is thus
undefined.  Instead we use a header size just large enough for a single
header and a payload length of 4 bytes for this first descriptor.

2. As we process received packets in the context's tasklet, read the
packet length out of the headers.  Keep track of the running total of
the packet length as "excess_bytes", so we can ignore any descriptors
where no packet starts or ends.  These descriptors may not have had
their first_res_count or second_res_count fields updated by the
controller so we cannot rely on those values.

The main drawback of this patch is that the excess_bytes value might get
"out of sync" with the packet descriptors if something strange happens
to the DMA program.  I'm not if such a thing could ever happen, but I
appreciate any suggestions in making it more robust.

Also, the packet-per-buffer support may need a similar fix to deal with
issue 1, but I haven't done any work on that yet.

Stefan, I'm hoping that with this patch, all your OHCI 1.1 controllers
will work properly with an unmodified version of libdc1394.

Signed-off-by: David Moore <dcm@acm.org>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2008-01-30 22:22:23 +01:00
Jarod Wilson a186b4a6b2 firewire: OHCI 1.0 Isochronous Receive support
Third rendition of FireWire OHCI 1.0 Isochronous Receive support, using a
zer-copy method similar to OHCI 1.1 which puts the IR data payload directly
into the userspace buffer. The zero-copy implementation eliminates the
video artifacts, audio popping, and buffer underrun problems seen with
version 1 of this patch, as well as fixing a regression in OHCI 1.1 support
introduced by version 2 of this patch.

Successfully tested in OHCI 1.1 mode on the following chipsets:

- NEC uPD72847 (rev 01), OHCI 1.1 (PCI)
- Ti XIO2200(A) (rev 01), OHCI 1.1 (PCIe)
- Ti TSB41AB2 (rev 01), OHCI 1.1 (PCI on SB Audigy)
- Apple UniNorth 2 (rev 81), OHCI 1.1 (PowerBook G4 onboard)

Successfully tested in OHCI 1.0 mode on the following chipsets:

- Agere FW323 (rev 06), OHCI 1.0 (Mac Mini onboard)
- Agere FW323 (rev 06), OHCI 1.0 (PCI)
- Via VT6306 (rev 46), OHCI 1.0 (PCI)
- NEC OrangeLink (rev 01), OHCI 1.0 (PCI)
- NEC uPD72847 (rev 01), OHCI 1.1 (PCI)
- Ti XIO2200(A) (rev 01), OHCI 1.1 (PCIe)

The bulk of testing was done in an x86_64 system, but was also successfully
sanity-tested on other systems, including a PPC(32) PowerBook G4 and an i686
EPIA M10k. Crude benchmarking (watching top during capture) puts the cpu
utilization during capture on the EPIA's 1GHz Via C3 processor around 13%,
which is down from 30% with the v1 code.

Some implementation details:

To maintain the same userspace API as dual-buffer mode, we set up two
descriptors for every incoming packet. The first is an INPUT_MORE descriptor,
pointing to a buffer large enough to hold just the packet's iso headers,
immediately followed by an INPUT_LAST descriptor, pointing to a chunk of the
userspace buffer big enough for the packet's data payload. With this setup,
each incoming packet fills in these two descriptors in a manner that very
closely emulates dual-buffer receive, to the point where the bulk of the
handle_ir_* code is now identical between the two (and probably primed for
some restructuring to share code between them).

The only caveat I have at the moment is that neither of my OHCI 1.0 Via
VT6307-based FireWire controllers work particularly well with this code
for reasons I have yet to figure out.

Signed-off-by: Jarod Wilson <jwilson@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-12-10 21:55:19 +01:00
Kristian Høgsberg 0bd243c4d9 firewire: Fix pci resume to not pass in a __be32 config rom.
The ohci_enable() function shared between pci_probe and pci_resume
takes a host endian config rom, but ohci->config_rom is __be32.  This
sets up the config rom in the wrong endian on little endian machine,
specifically, BusOptions will be initialized to a 0 max receive size.

This patch changes the way we reuse the config rom so that we avoid
this problem.

Signed-off-by: Kristian Hoegsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-10-31 19:02:19 +01:00
Stefan Richter 4b6d51ec62 firewire: fw-ohci: shut up a superfluous compiler warning
New warning since commit ab88ca488b,
"firewire: fw-ohci: missing dma_unmap_single":
drivers/firewire/fw-ohci.c: In function 'at_context_transmit':
drivers/firewire/fw-ohci.c:609: warning: 'payload_bus' may be used
 uninitialized in this function

Access to payload_bus is conditional on packet->payload_length > 0,
and that won't change while in at_context_queue_packet.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-10-22 19:48:56 +02:00
Stefan Richter c74e92c209 firewire: fw-ohci: log a note about unsupported features
because there seems to be more time needed to implement this.
Also, change related error return values to more appropriate ones.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-10-22 19:48:55 +02:00
Stefan Richter 02ff8f8ee1 firewire: fw-ohci: check for misconfigured bus (phyID == 63)
Check NodeID.nodeNumber as per OHCI 1.1 clause 7.2.3.2.  See also IEEE
1394a table 5B-1.

Also, demote the "node ID not valid" message from error to notification
as it is not an error condition.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-10-17 00:00:08 +02:00
Stefan Richter ab88ca488b firewire: fw-ohci: missing dma_unmap_single
at_context_queue_packet() didn't clean up in an early exit path.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
2007-10-17 00:00:07 +02:00
Stefan Richter e524f616f5 firewire: fw-ohci: log posted write errors
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-10-17 00:00:06 +02:00
Stefan Richter a7fb60db71 firewire: fw-ohci: reorder includes
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-10-17 00:00:06 +02:00
Stefan Richter c26f02340e firewire: fw-ohci: fix includes
Add used includes, remove unused includes.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-10-17 00:00:05 +02:00
Stefan Richter ee71c2f9ee firewire: fw-ohci: enforce read order for selfID generation
It seems unlikely, but access to self_id_cpu[0] could at least in theory
be deferred until after the loop over self_id_cpu[1..n] or even after
the subsequent reg_read.  Enforce the desired order by a read barrier.

Also prevent the reg_read from being reordered relative to the for loop.
This isn't necessary if the loop's conditional printk counts as an
implicit barrier, but better make it explicit.

(self_id_cpu[] is a coherent DMA buffer.)

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-10-17 00:00:05 +02:00
Stefan Richter 5511142870 firewire: fw-ohci: ignore failure of pci_set_power_state (fix suspend regression)
Fixes (papers over) "Sleep problems with kernels >= 2.6.21 on powerpc",
http://lkml.org/lkml/2007/8/25/155.  The issue is that the FireWire
controller's pci_dev.current_state of iBook G3 and presumably older
PowerBooks is still in PCI_UNKNOWN instead of PCI_D0 when the firewire
driver's .suspend method is called.

Like it was suggested earlier in http://lkml.org/lkml/2006/10/24/13, we
do not fail .suspend anymore if pci_set_power_state failed.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-09-07 18:44:35 +02:00
Stefan Richter 4eaff7d630 firewire: fw-ohci: dma_free_coherent needs IRQs enabled
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-08-02 20:34:17 +02:00
Stefan Richter b980f5a224 firewire: fw-ohci: fix "scheduling while atomic"
context_stop is called by bus_reset_tasklet, among else.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-07-18 23:53:27 +02:00
Stefan Richter 362e901c65 firewire: fw-ohci: flush MMIO write before msleep
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-07-18 23:53:27 +02:00
Stefan Richter 8a8cea2734 firewire: missing newline in printk
Also remove some errno printouts which will be shown by infrastructure
code anyway.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-07-10 00:07:42 +02:00
Stefan Richter 0a9972baa7 firewire: fix async reception on big endian machines
descriptor.data_address is little endian

Tested-by: Olaf Hering <olh@suse.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
2007-06-29 17:32:07 +02:00
Stefan Richter a515958d6f firewire: fix hang after card ejection
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
2007-06-16 12:43:20 +02:00
Kristian Høgsberg 2aef469a35 firewire: Implement suspend/resume PCI driver hooks.
It's a low-impact design, that just makes suspend/resume look like
a bus reset to the upper level drivers, but it should be sufficient.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-05-31 21:40:14 +02:00
Kristian Høgsberg ec839e43fb firewire: Add missing byteswapping for receive DMA programs.
Signed-off-by: Kristian Hoegsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-05-27 23:21:00 +02:00
Al Viro faa2fb4e67 missing mm.h in fw-ohci
need it for page_private(), not all targets have it pulled indirectly

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-15 18:56:37 -07:00
Kristian Høgsberg d79406dd14 firewire: Convert OHCI driver to use standard goto unwinding for error handling.
Signed-off-by: Kristian Hoegsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-05-10 18:24:14 +02:00
Kristian Høgsberg 2d826cc5c7 firewire: Always use parens with sizeof.
Signed-off-by: Kristian Hoegsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-05-10 18:24:14 +02:00
Olaf Hering 1e4c7b0dab firewire: Provide module aliase for backwards compatibility.
This patch loads fw-sbp2 if sbp2 is still in the config file. So one can
go back and forth between releases without worry about the root
filesystem drivers.

Signed-off-by: Kristian Hoegsberg <krh@redhat.com>

Existing mkinitrd scripts still have to be adapted, unless they grok
module aliases.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-05-10 18:24:14 +02:00
Kristian Høgsberg a77754a75d firewire: Uppercase most macro names.
Signed-off-by: Kristian Hoegsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-05-10 18:24:13 +02:00
Kristian Høgsberg c781c06d11 firewire: Clean up comment style.
Drop filenames from file preamble, drop editor annotations and
use standard indent style for block comments.

Signed-off-by: Kristian Hoegsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (fixed typo)
2007-05-10 18:24:13 +02:00
Kristian Høgsberg 053b30808f firewire: Check for CONTEXT_RUN not CONTEXT_ACTIVE when starting AT DMA context.
Doh, bad typo...

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-04-12 00:18:57 +02:00
Kristian Høgsberg 15536221d1 firewire: Byteswap iso header so all headers are presented as be32.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-04-12 00:18:57 +02:00
Kristian Høgsberg 8a2f7d932f firewire: Fix start on cycle 0 for IT, implement start on cycle for IR.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-28 21:37:54 +02:00
Kristian Høgsberg 20d1167311 firewire: Remember to set the driver_data pointer when queueing a packet.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-28 21:30:14 +02:00
Kristian Høgsberg eb0306eac0 firewire: Move sync and tag parameters to start_iso ioctl.
Setting these at create_context time or start_iso time doesn't matter
much, but raw1394 sets them at start_iso time so that will be easier to
emulate this way.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-15 18:21:36 +01:00
Kristian Høgsberg c70dc788fd firewire: Fix dualbuffer iso receive mode and drop buffer fill mode.
The dualbuffer DMA setup did not account for the iso trailer word
and thus didn't  work correctly.  With this fixed we can drop the
dual buffer fallback mode.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-15 18:21:36 +01:00
Kristian Høgsberg d60d7f1d5c firewire: Implement CSR cycle time and bus time registers.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:03:15 +01:00
Kristian Høgsberg 473d28c730 firewire: Implement topology map and fix a couple of loopback bugs.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:03:14 +01:00
Kristian Høgsberg f319b6a02f firewire: Move async transmit to use the general context code.
The old async transmit context handling was starting and stopping
DMA for every packet transmission.  This could cause silently failing
packet transmission, if the DMA was reprogrammed too close to being
stopped.

The general context code keeps DMA running at all times and fixes this
problem.  It's also a nice cleanup.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:03:11 +01:00
Kristian Høgsberg e254a4b45f firewire: Clear all interrupt bits before shutting down.
Some flaky controllers doesn't honor the masterIntEnable bits
and can generate bus reset events even if that bit is cleared.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:03:06 +01:00
Thomas Gleixner 65efffa8f0 firewire: Scheduled removal of SA_xxx interrupt flags fixups 3
The obsolete SA_xxx interrupt flags have been used despite the scheduled
removal.  Fixup the remaining users in -mm.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:03:05 +01:00
Stefan Richter 373b2edd86 firewire: adjust whitespace
Remove space before tab and trailing whitespace.
Unify indentation of goto target labels.

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:03:04 +01:00
Kristian Høgsberg 98b6cbe83b firewire: Implement sync and tag matching for isochronous receive.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:03:04 +01:00
Kristian Høgsberg 21efb3cfc6 firewire: Configure channel and speed at context creation time.
We need the channel number as we queue up iso packets for transmission
so we can fill out the header correctly.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:03:03 +01:00
Kristian Høgsberg e364cf4e0a firewire: Store OHCI version and make sure we have at least 1.1 before doing dualbuffer.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:03:03 +01:00
Kristian Høgsberg cb2d2cdbc6 firewire: Don't touch DMA descriptors after appending.
When a DMA descriptor is appended to the context we sync it for
DMA and the device might potentially read it immediately.  So,
we can't set the IRQ bits in the descriptor after appending.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:03:02 +01:00
Kristian Høgsberg d2746dc192 firewire: Use a buffer fill descriptor for receive when header size is 0.
When the DMA is setup to not strip any headers, we need to use
the buffer fill descriptor instead of the dual buffer, since the
dual buffer descriptor must strip a non-zero number of header quadlets.

Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:03:01 +01:00
Kristian Høgsberg 1e1d196bf5 firewire: Set correct buffer lengths for dualbuffer DMA descriptor.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:03:01 +01:00
Kristian Høgsberg 9b32d5f307 firewire: Acummulate received iso headers and send them back to user space.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:03:00 +01:00
Kristian Høgsberg 500be7251a firewire: Log OHCI chipset version in PCI probe.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:03:00 +01:00
Kristian Høgsberg b82956685a firewire: Implement functionality to stop isochronous DMA contexts.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:02:59 +01:00
Kristian Høgsberg 69cdb7268c firewire: Rename 'send_iso' to 'start_iso'.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:02:59 +01:00
Kristian Høgsberg 295e3feb92 firewire: Implement basic isochronous receive functionality.
Signed-off-by: Kristian Høgsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
2007-03-09 22:02:58 +01:00