diff options
author | Lubomir Rintel <lkundrak@v3.sk> | 2013-12-22 05:31:41 -0500 |
---|---|---|
committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2014-01-12 12:54:38 -0500 |
commit | a9954ce769e2c8b450b00ab2a4e208f447996b2d (patch) | |
tree | 6305ff7464f03effbc8b3b1b2568b4cad4990aee /Documentation | |
parent | 7e22e91102c6b9df7c4ae2168910e19d2bb14cd6 (diff) |
Documentation/: update FireWire debugging documentation
The old firewire stack is long dead now and a new version firescope has
been released with support for current kernels.
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Cc: Rob Landley <rob@landley.net>
Cc: Justin P. Mattock <justinmattock@gmail.com>
Cc: Bernhard Kaindl <bk@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/debugging-via-ohci1394.txt | 24 | ||||
-rw-r--r-- | Documentation/power/basic-pm-debugging.txt | 2 |
2 files changed, 10 insertions, 16 deletions
diff --git a/Documentation/debugging-via-ohci1394.txt b/Documentation/debugging-via-ohci1394.txt index 611f5a5499b1..14d194496490 100644 --- a/Documentation/debugging-via-ohci1394.txt +++ b/Documentation/debugging-via-ohci1394.txt | |||
@@ -36,17 +36,13 @@ available (notebooks) or too slow for extensive debug information (like ACPI). | |||
36 | Drivers | 36 | Drivers |
37 | ------- | 37 | ------- |
38 | 38 | ||
39 | The ohci1394 driver in drivers/ieee1394 initializes the OHCI-1394 controllers | 39 | The firewire-ohci driver in drivers/firewire uses filtered physical |
40 | to a working state and enables physical DMA by default for all remote nodes. | ||
41 | This can be turned off by ohci1394's module parameter phys_dma=0. | ||
42 | |||
43 | The alternative firewire-ohci driver in drivers/firewire uses filtered physical | ||
44 | DMA by default, which is more secure but not suitable for remote debugging. | 40 | DMA by default, which is more secure but not suitable for remote debugging. |
45 | Compile the driver with CONFIG_FIREWIRE_OHCI_REMOTE_DMA (Kernel hacking menu: | 41 | Compile the driver with CONFIG_FIREWIRE_OHCI_REMOTE_DMA (Kernel hacking menu: |
46 | Remote debugging over FireWire with firewire-ohci) to get unfiltered physical | 42 | Remote debugging over FireWire with firewire-ohci) to get unfiltered physical |
47 | DMA. | 43 | DMA. |
48 | 44 | ||
49 | Because ohci1394 and firewire-ohci depend on the PCI enumeration to be | 45 | Because the firewire-ohci driver depends on the PCI enumeration to be |
50 | completed, an initialization routine which runs pretty early has been | 46 | completed, an initialization routine which runs pretty early has been |
51 | implemented for x86. This routine runs long before console_init() can be | 47 | implemented for x86. This routine runs long before console_init() can be |
52 | called, i.e. before the printk buffer appears on the console. | 48 | called, i.e. before the printk buffer appears on the console. |
@@ -64,7 +60,7 @@ be used to view the printk buffer of a remote machine, even with live update. | |||
64 | 60 | ||
65 | Bernhard Kaindl enhanced firescope to support accessing 64-bit machines | 61 | Bernhard Kaindl enhanced firescope to support accessing 64-bit machines |
66 | from 32-bit firescope and vice versa: | 62 | from 32-bit firescope and vice versa: |
67 | - http://halobates.de/firewire/firescope-0.2.2.tar.bz2 | 63 | - http://v3.sk/~lkundrak/firescope/ |
68 | 64 | ||
69 | and he implemented fast system dump (alpha version - read README.txt): | 65 | and he implemented fast system dump (alpha version - read README.txt): |
70 | - http://halobates.de/firewire/firedump-0.1.tar.bz2 | 66 | - http://halobates.de/firewire/firedump-0.1.tar.bz2 |
@@ -92,11 +88,11 @@ Step-by-step instructions for using firescope with early OHCI initialization: | |||
92 | 88 | ||
93 | 1) Verify that your hardware is supported: | 89 | 1) Verify that your hardware is supported: |
94 | 90 | ||
95 | Load the ohci1394 or the fw-ohci module and check your kernel logs. | 91 | Load the firewire-ohci module and check your kernel logs. |
96 | You should see a line similar to | 92 | You should see a line similar to |
97 | 93 | ||
98 | ohci1394: fw-host0: OHCI-1394 1.1 (PCI): IRQ=[18] MMIO=[fe9ff800-fe9fffff] | 94 | firewire_ohci 0000:15:00.1: added OHCI v1.0 device as card 2, 4 IR + 4 IT |
99 | ... Max Packet=[2048] IR/IT contexts=[4/8] | 95 | ... contexts, quirks 0x11 |
100 | 96 | ||
101 | when loading the driver. If you have no supported controller, many PCI, | 97 | when loading the driver. If you have no supported controller, many PCI, |
102 | CardBus and even some Express cards which are fully compliant to OHCI-1394 | 98 | CardBus and even some Express cards which are fully compliant to OHCI-1394 |
@@ -113,20 +109,18 @@ Step-by-step instructions for using firescope with early OHCI initialization: | |||
113 | 109 | ||
114 | If an driver is running on both machines you should see a line like | 110 | If an driver is running on both machines you should see a line like |
115 | 111 | ||
116 | ieee1394: Node added: ID:BUS[0-01:1023] GUID[0090270001b84bba] | 112 | firewire_core 0000:15:00.1: created device fw1: GUID 00061b0020105917, S400 |
117 | 113 | ||
118 | on both machines in the kernel log when the cable is plugged in | 114 | on both machines in the kernel log when the cable is plugged in |
119 | and connects the two machines. | 115 | and connects the two machines. |
120 | 116 | ||
121 | 3) Test physical DMA using firescope: | 117 | 3) Test physical DMA using firescope: |
122 | 118 | ||
123 | On the debug host, | 119 | On the debug host, make sure that /dev/fw* is accessible, |
124 | - load the raw1394 module, | ||
125 | - make sure that /dev/raw1394 is accessible, | ||
126 | then start firescope: | 120 | then start firescope: |
127 | 121 | ||
128 | $ firescope | 122 | $ firescope |
129 | Port 0 (ohci1394) opened, 2 nodes detected | 123 | Port 0 (/dev/fw1) opened, 2 nodes detected |
130 | 124 | ||
131 | FireScope | 125 | FireScope |
132 | --------- | 126 | --------- |
diff --git a/Documentation/power/basic-pm-debugging.txt b/Documentation/power/basic-pm-debugging.txt index e9b54de8fdf7..edeecd447d23 100644 --- a/Documentation/power/basic-pm-debugging.txt +++ b/Documentation/power/basic-pm-debugging.txt | |||
@@ -172,7 +172,7 @@ you can boot the kernel with the 'no_console_suspend' parameter and try to log | |||
172 | kernel messages using the serial console. This may provide you with some | 172 | kernel messages using the serial console. This may provide you with some |
173 | information about the reasons of the suspend (resume) failure. Alternatively, | 173 | information about the reasons of the suspend (resume) failure. Alternatively, |
174 | it may be possible to use a FireWire port for debugging with firescope | 174 | it may be possible to use a FireWire port for debugging with firescope |
175 | (ftp://ftp.firstfloor.org/pub/ak/firescope/). On x86 it is also possible to | 175 | (http://v3.sk/~lkundrak/firescope/). On x86 it is also possible to |
176 | use the PM_TRACE mechanism documented in Documentation/power/s2ram.txt . | 176 | use the PM_TRACE mechanism documented in Documentation/power/s2ram.txt . |
177 | 177 | ||
178 | 2. Testing suspend to RAM (STR) | 178 | 2. Testing suspend to RAM (STR) |