diff options
| author | Logan Gunthorpe <logang@deltatee.com> | 2017-03-02 16:24:34 -0700 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-04-12 12:23:37 -0500 |
| commit | 52eabba5bcdb2853dec6ef007ba427b092034738 (patch) | |
| tree | 959b69df05f188f33ae2d7e5ba53158fd50f2f83 /Documentation/switchtec.txt | |
| parent | 5d8e1881f431cf470170813eb048e6a384340904 (diff) | |
| download | linux-52eabba5bcdb2853dec6ef007ba427b092034738.tar.bz2 | |
switchtec: Add IOCTLs to the Switchtec driver
Add a couple of special IOCTLs to:
* Inform userspace of firmware partition locations
* Pass event counts and allow userspace to wait on events
* Translate PFF numbers used by the switch to port numbers
[Dan Carpenter <dan.carpenter@oracle.com>: fix off-by-one in
ioctl_event_ctl()]
Tested-by: Krishna Dhulipala <krishnad@fb.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Stephen Bates <stephen.bates@microsemi.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Wei Zhang <wzhang@fb.com>
Reviewed-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'Documentation/switchtec.txt')
| -rw-r--r-- | Documentation/switchtec.txt | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/Documentation/switchtec.txt b/Documentation/switchtec.txt index 4bced4c78446..a0a9c7b3d4d5 100644 --- a/Documentation/switchtec.txt +++ b/Documentation/switchtec.txt @@ -51,3 +51,30 @@ The char device has the following semantics: * The poll call will also be supported for userspace applications that need to do other things while waiting for the command to complete. + +The following IOCTLs are also supported by the device: + +* SWITCHTEC_IOCTL_FLASH_INFO - Retrieve firmware length and number + of partitions in the device. + +* SWITCHTEC_IOCTL_FLASH_PART_INFO - Retrieve address and lengeth for + any specified partition in flash. + +* SWITCHTEC_IOCTL_EVENT_SUMMARY - Read a structure of bitmaps + indicating all uncleared events. + +* SWITCHTEC_IOCTL_EVENT_CTL - Get the current count, clear and set flags + for any event. This ioctl takes in a switchtec_ioctl_event_ctl struct + with the event_id, index and flags set (index being the partition or PFF + number for non-global events). It returns whether the event has + occurred, the number of times and any event specific data. The flags + can be used to clear the count or enable and disable actions to + happen when the event occurs. + By using the SWITCHTEC_IOCTL_EVENT_FLAG_EN_POLL flag, + you can set an event to trigger a poll command to return with + POLLPRI. In this way, userspace can wait for events to occur. + +* SWITCHTEC_IOCTL_PFF_TO_PORT and SWITCHTEC_IOCTL_PORT_TO_PFF convert + between PCI Function Framework number (used by the event system) + and Switchtec Logic Port ID and Partition number (which is more + user friendly). |