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author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-05-08 18:29:27 -0700 |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2009-05-08 18:29:27 -0700 |
commit | d585a021c0b10b0477d6b608c53e1feb8cde0507 (patch) | |
tree | 5ca059da1db7f15d4b29427644ad9c08270c885c /Documentation/filesystems/sysfs-pci.txt | |
parent | 84e5b0d00f8f84c4ae226be131d4bebbcee88bd3 (diff) | |
parent | 091bf7624d1c90cec9e578a18529f615213ff847 (diff) |
Merge commit 'v2.6.30-rc5' into next
Diffstat (limited to 'Documentation/filesystems/sysfs-pci.txt')
-rw-r--r-- | Documentation/filesystems/sysfs-pci.txt | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/filesystems/sysfs-pci.txt b/Documentation/filesystems/sysfs-pci.txt index 9f8740ca3f3..26e4b8bc53e 100644 --- a/Documentation/filesystems/sysfs-pci.txt +++ b/Documentation/filesystems/sysfs-pci.txt @@ -12,6 +12,7 @@ that support it. For example, a given bus might look like this: | |-- enable | |-- irq | |-- local_cpus + | |-- remove | |-- resource | |-- resource0 | |-- resource1 @@ -36,6 +37,7 @@ files, each with their own function. enable Whether the device is enabled (ascii, rw) irq IRQ number (ascii, ro) local_cpus nearby CPU mask (cpumask, ro) + remove remove device from kernel's list (ascii, wo) resource PCI resource host addresses (ascii, ro) resource0..N PCI resource N, if present (binary, mmap) resource0_wc..N_wc PCI WC map resource N, if prefetchable (binary, mmap) @@ -46,6 +48,7 @@ files, each with their own function. ro - read only file rw - file is readable and writable + wo - write only file mmap - file is mmapable ascii - file contains ascii text binary - file contains binary data @@ -73,6 +76,13 @@ that the device must be enabled for a rom read to return data succesfully. In the event a driver is not bound to the device, it can be enabled using the 'enable' file, documented above. +The 'remove' file is used to remove the PCI device, by writing a non-zero +integer to the file. This does not involve any kind of hot-plug functionality, +e.g. powering off the device. The device is removed from the kernel's list of +PCI devices, the sysfs directory for it is removed, and the device will be +removed from any drivers attached to it. Removal of PCI root buses is +disallowed. + Accessing legacy resources through sysfs ---------------------------------------- |