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| author | David Bond <dbond@suse.com> | 2016-03-23 21:49:26 -0400 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2016-05-16 11:14:29 -0400 |
| commit | b3c8eb50383178f3a4dcf1dc867001156da6473d (patch) | |
| tree | 10a3cc85d4bb4dc77f02aa72e967f7d37cb90ff2 /Documentation | |
| parent | 9a99425f0736a416442525ac7b15903173888b86 (diff) | |
| download | lwn-b3c8eb50383178f3a4dcf1dc867001156da6473d.tar.gz lwn-b3c8eb50383178f3a4dcf1dc867001156da6473d.zip | |
ibft: Expose iBFT acpi header via sysfs
Some ethernet adapter vendors are supplying products which support optional
(payed license) features. On some adapters this includes a hardware iscsi
initiator. The same adapters in a normal (no extra licenses) mode of
operation can be used as a software iscsi initiator. In addition, software
iscsi boot initiators are becoming a standard part of many vendors uefi
implementations. This is creating difficulties during early boot/install
determining the proper configuration method for these adapters when they
are used as a boot device.
The attached patch creates sysfs entries to expose information from the
acpi header of the ibft table. This information allows for a method to
easily determining if an ibft table was created by a ethernet card's
firmware or the system uefi/bios. In the case of a hardware initiator this
information in combination with the pci vendor and device id can be used
to ascertain any vendor specific behaviors that need to be accommodated.
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: David Bond <dbond@suse.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-ibft | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-ibft b/Documentation/ABI/testing/sysfs-ibft index cac3930bdb04..7d6725fe6143 100644 --- a/Documentation/ABI/testing/sysfs-ibft +++ b/Documentation/ABI/testing/sysfs-ibft @@ -21,3 +21,13 @@ Contact: Konrad Rzeszutek <ketuzsezr@darnok.org> Description: The /sys/firmware/ibft/ethernetX directory will contain files that expose the iSCSI Boot Firmware Table NIC data. Usually this contains the IP address, MAC, and gateway of the NIC. + +What: /sys/firmware/ibft/acpi_header +Date: March 2016 +Contact: David Bond <dbond@suse.com> +Description: The /sys/firmware/ibft/acpi_header directory will contain files + that expose the SIGNATURE, OEM_ID, and OEM_TABLE_ID fields of the + acpi table header of the iBFT structure. This will allow for + identification of the creator of the table which is useful in + determining quirks associated with some adapters when used in + hardware vs software iscsi initiator mode. |