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Copyright 2009 Sun Microsystems, Inc. All rights reserved.
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pcitool - interrupt routing tool

/usr/sbin/pcitool pci@<unit-address> -i <ino#> | all [ -r [ -c ] | -w <cpu#> [ -g ] ] [ -v ] [ -q ] /usr/sbin/pcitool pci@<unit-address> -m <msi#> | all [ -r [ -c ] | -w <cpu#> [ -g ] ] [ -v ] [ -q ] /usr/sbin/pcitool [ -h ]

PCItool is a low-level tool which provides a facility for getting and setting interrupt routing information.

The pcitool -i command displays device and CPU routing information for INOs on a given nexus, and allows rerouting of a given INO or INO group to a specific CPU. Use the pcitool -m command to retrieve and reroute MSI/Xs. On SPARC platforms, the INO is mapped to an interrupt mondo, where as one or more MSI/Xs are mapped to an INO. So, INO and MSI/Xs are individually retargetable. Use "-i" option to retrieve or reroute a given INO, where as use "-m" option for MSI/Xs. On x86 platforms, both INOs and MSI/Xs are mapped to the same interrupt vectors. Use "-i" option to retrieve and reroute any interrupt vectors (both INO and MSI/Xs). So, "-m" option is not required on x86 platforms. Hence it is not supported. Required privileges The user must have all privileges in order to access interrupt information. A regular user can access interrupt information when su(1M) to root or granted the "Maintenance and Repair" rights profile in the user_attr file. See user_attr(4) and rbac(5). Commandline options -r [ -c ] Display device and CPU routing information for INOs on a given nexus. The device path and instance number of each device for each displayed INO will be shown. On some platforms, interrupts dedicated to the root complex are indicated with "(Internal)" appended to their pathname. Dump interrupt controller information with -c. If neither -r nor -w are provided on the commandline, -r is assumed. The command for showing all INOs on /pci@1e,600000 is: # pcitool /pci@1e,600000 -i all The command for showing ino 0x19 on the same root nexus, along with sample output, is: # pcitool /pci@1e,600000 -i 19 ino 19 mapped to cpu 0 Device: /pci@1e,600000/pci@0/pci@9/pci@0/scsi@1 Driver: mpt, instance 0 ino 19 mapped to cpu 0 Device: /pci@1e,600000/pci@0/pci@2/pci@0/network@4 Driver: bge, instance 0 The command for showing MSI 0x1 on the same root nexus, along with sample output, is: # pcitool /pci@1e,600000 -m 1 msi 1 mapped to cpu 0 Device: /pci@1e,600000/pci@0/pci@9/pci@0/scsi@1 Driver: mpt, instance 0 -w <cpu#> [ -g ] Route the given INO or MSI/X to the given CPU. Display the new and original routing information. The INO or MSI/X must be specified. Successful rerouting ino 19 above from cpu 0 to cpu 1 gives the following output: # pcitool /pci@1e,600000 -i 19 -w 1 Interrupts on ino 19 reassigned: Old cpu: 0, New cpu: 1 Successful rerouting msi 1 above from cpu 1 to cpu 0 gives the following output: # pcitool /pci@1e,600000 -m 1 -w 0 Interrupts on msi 1 reassigned: Old cpu: 1, New cpu: 0 On some platforms (such as X86) multiple MSI interrupts of a single function need to be rerouted together. Use -g to do this. -g works only on supported platforms and only for groups of MSI interrupts. (A "group" of 1 is accepted.) When -g is used, the vector provided must be the lowest-numbered vector of the group. The size of the group is determined internally. Successful rerouting a group of INOs starting at 60 from cpu 0 to cpu 1 gives the following output: # pcitool /pci@0,0 -i 60 -w 1 -g Interrupts on ino group starting at ino 60 reassigned: Old cpu: 0, New cpu: 1 -v Verbose output. -q No errors reported as messages. Unix error status still returned by program, however. The following error statuses are returned to the shell:

0 No error

EINVAL Out-of-range, misaligned or otherwise invalid argument has been passed in.

ETIME Timeout waiting for pending interrupt to settle before changing interrupts to a new CPU.

EIO An IO error occurred.

/usr/sbin/pcitool

See attributes(5) for descriptions of the following attributes: _________________________________________________________ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |______________________|__________________________________| | Architecture | PCI-based systems | |______________________|__________________________________| | Availability | SUNWio-tools | |______________________|__________________________________| | Interface Stability | Volatile | |______________________|__________________________________|

pci(4), su(1M), user_attr(4), rbac(5) All values are entered in hex. Not all commands are applicable to all platforms. REFERENCES PCI specification (available from www.pcisig.org)