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| author | Corey Minyard <minyard@acm.org> | 2006-12-06 20:41:07 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.osdl.org> | 2006-12-07 08:39:47 -0800 |
| commit | b361e27bba261ba59c73df464fa640f7c0fe3553 (patch) | |
| tree | 4c457c471eb42be1fbcc9e76989e275fa8e023df /Documentation/IPMI.txt | |
| parent | 15c62e10bb49eebf3da2b010a9196f5095947b0b (diff) | |
| download | lwn-b361e27bba261ba59c73df464fa640f7c0fe3553.tar.gz lwn-b361e27bba261ba59c73df464fa640f7c0fe3553.zip | |
[PATCH] IPMI: system interface hotplug
Add the ability to hot add and remove interfaces in the ipmi_si driver. Any
users who have the device open will get errors if they try to send a message.
Signed-off-by: Corey Minyard <minyard@acm.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation/IPMI.txt')
| -rw-r--r-- | Documentation/IPMI.txt | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/IPMI.txt b/Documentation/IPMI.txt index 9101cbf2d883..24dc3fcf1594 100644 --- a/Documentation/IPMI.txt +++ b/Documentation/IPMI.txt @@ -365,6 +365,7 @@ You can change this at module load time (for a module) with: regshifts=<shift1>,<shift2>,... slave_addrs=<addr1>,<addr2>,... force_kipmid=<enable1>,<enable2>,... + unload_when_empty=[0|1] Each of these except si_trydefaults is a list, the first item for the first interface, second item for the second interface, etc. @@ -416,6 +417,11 @@ by the driver, but systems with broken interrupts might need an enable, or users that don't want the daemon (don't need the performance, don't want the CPU hit) can disable it. +If unload_when_empty is set to 1, the driver will be unloaded if it +doesn't find any interfaces or all the interfaces fail to work. The +default is one. Setting to 0 is useful with the hotmod, but is +obviously only useful for modules. + When compiled into the kernel, the parameters can be specified on the kernel command line as: @@ -441,6 +447,25 @@ have high-res timers enabled in the kernel and you don't have interrupts enabled, the driver will run VERY slowly. Don't blame me, these interfaces suck. +The driver supports a hot add and remove of interfaces. This way, +interfaces can be added or removed after the kernel is up and running. +This is done using /sys/modules/ipmi_si/hotmod, which is a write-only +parameter. You write a string to this interface. The string has the +format: + <op1>[:op2[:op3...]] +The "op"s are: + add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]] +You can specify more than one interface on the line. The "opt"s are: + rsp=<regspacing> + rsi=<regsize> + rsh=<regshift> + irq=<irq> + ipmb=<ipmb slave addr> +and these have the same meanings as discussed above. Note that you +can also use this on the kernel command line for a more compact format +for specifying an interface. Note that when removing an interface, +only the first three parameters (si type, address type, and address) +are used for the comparison. Any options are ignored for removing. The SMBus Driver ---------------- |