aboutsummaryrefslogtreecommitdiffstats
path: root/Documentation
diff options
context:
space:
mode:
authorCorey Minyard <minyard@acm.org>2006-12-06 23:41:07 -0500
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-07 11:39:47 -0500
commitb361e27bba261ba59c73df464fa640f7c0fe3553 (patch)
tree4c457c471eb42be1fbcc9e76989e275fa8e023df /Documentation
parent15c62e10bb49eebf3da2b010a9196f5095947b0b (diff)
[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')
-rw-r--r--Documentation/IPMI.txt25
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:
365 regshifts=<shift1>,<shift2>,... 365 regshifts=<shift1>,<shift2>,...
366 slave_addrs=<addr1>,<addr2>,... 366 slave_addrs=<addr1>,<addr2>,...
367 force_kipmid=<enable1>,<enable2>,... 367 force_kipmid=<enable1>,<enable2>,...
368 unload_when_empty=[0|1]
368 369
369Each of these except si_trydefaults is a list, the first item for the 370Each of these except si_trydefaults is a list, the first item for the
370first interface, second item for the second interface, etc. 371first interface, second item for the second interface, etc.
@@ -416,6 +417,11 @@ by the driver, but systems with broken interrupts might need an enable,
416or users that don't want the daemon (don't need the performance, don't 417or users that don't want the daemon (don't need the performance, don't
417want the CPU hit) can disable it. 418want the CPU hit) can disable it.
418 419
420If unload_when_empty is set to 1, the driver will be unloaded if it
421doesn't find any interfaces or all the interfaces fail to work. The
422default is one. Setting to 0 is useful with the hotmod, but is
423obviously only useful for modules.
424
419When compiled into the kernel, the parameters can be specified on the 425When compiled into the kernel, the parameters can be specified on the
420kernel command line as: 426kernel command line as:
421 427
@@ -441,6 +447,25 @@ have high-res timers enabled in the kernel and you don't have
441interrupts enabled, the driver will run VERY slowly. Don't blame me, 447interrupts enabled, the driver will run VERY slowly. Don't blame me,
442these interfaces suck. 448these interfaces suck.
443 449
450The driver supports a hot add and remove of interfaces. This way,
451interfaces can be added or removed after the kernel is up and running.
452This is done using /sys/modules/ipmi_si/hotmod, which is a write-only
453parameter. You write a string to this interface. The string has the
454format:
455 <op1>[:op2[:op3...]]
456The "op"s are:
457 add|remove,kcs|bt|smic,mem|i/o,<address>[,<opt1>[,<opt2>[,...]]]
458You can specify more than one interface on the line. The "opt"s are:
459 rsp=<regspacing>
460 rsi=<regsize>
461 rsh=<regshift>
462 irq=<irq>
463 ipmb=<ipmb slave addr>
464and these have the same meanings as discussed above. Note that you
465can also use this on the kernel command line for a more compact format
466for specifying an interface. Note that when removing an interface,
467only the first three parameters (si type, address type, and address)
468are used for the comparison. Any options are ignored for removing.
444 469
445The SMBus Driver 470The SMBus Driver
446---------------- 471----------------