diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-18 11:24:29 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-18 11:24:29 -0700 |
commit | eddeb0e2d863e3941d8768e70cb50c6120e61fa0 (patch) | |
tree | e30f2b6654e6eb397f9d7fb23a08d717cc19b12d /Documentation | |
parent | 855d854a33fca71cf68bad258bd5e66e5b265d10 (diff) | |
parent | db8be076cad4b843aa743ef462c75022cddd9c63 (diff) |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: (43 commits)
firewire: cleanups
firewire: fix synchronization of gap counts
firewire: wait until PHY configuration packet was transmitted (fix bus reset loop)
firewire: remove unused struct member
firewire: use bitwise and to get reg in handle_registers
firewire: replace more hex values with defined csr constants
firewire: reread config ROM when device reset the bus
firewire: replace static ROM cache by allocated cache
firewire: fw-ohci: work around generation bug in TI controllers (fix AV/C and more)
firewire: fw-ohci: extend logging of bus generations and node ID
firewire: fw-ohci: conditionally log busReset interrupts
firewire: fw-ohci: don't append to AT context when it's not active
firewire: fw-ohci: log regAccessFail events
firewire: fw-ohci: make sure HCControl register LPS bit is set
firewire: fw-ohci: missing PPC PMac feature calls in failure path
firewire: fw-ohci: untangle a mixed unsigned/signed expression
firewire: debug interrupt events
firewire: fw-ohci: catch self_id_count == 0
firewire: fw-ohci: add self ID error check
firewire: fw-ohci: refactor probe, remove, suspend, resume
...
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/debugging-via-ohci1394.txt | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/Documentation/debugging-via-ohci1394.txt b/Documentation/debugging-via-ohci1394.txt index c360d4e91b4..59a91e5c690 100644 --- a/Documentation/debugging-via-ohci1394.txt +++ b/Documentation/debugging-via-ohci1394.txt @@ -41,15 +41,19 @@ to a working state and enables physical DMA by default for all remote nodes. This can be turned off by ohci1394's module parameter phys_dma=0. The alternative firewire-ohci driver in drivers/firewire uses filtered physical -DMA, hence is not yet suitable for remote debugging. +DMA by default, which is more secure but not suitable for remote debugging. +Compile the driver with CONFIG_FIREWIRE_OHCI_REMOTE_DMA (Kernel hacking menu: +Remote debugging over FireWire with firewire-ohci) to get unfiltered physical +DMA. -Because ohci1394 depends on the PCI enumeration to be completed, an -initialization routine which runs pretty early (long before console_init() -which makes the printk buffer appear on the console can be called) was written. +Because ohci1394 and firewire-ohci depend on the PCI enumeration to be +completed, an initialization routine which runs pretty early has been +implemented for x86. This routine runs long before console_init() can be +called, i.e. before the printk buffer appears on the console. To activate it, enable CONFIG_PROVIDE_OHCI1394_DMA_INIT (Kernel hacking menu: -Provide code for enabling DMA over FireWire early on boot) and pass the -parameter "ohci1394_dma=early" to the recompiled kernel on boot. +Remote debugging over FireWire early on boot) and pass the parameter +"ohci1394_dma=early" to the recompiled kernel on boot. Tools ----- |