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* NTB: switchtec_ntb: Update switchtec documentation with notes for NTBLogan Gunthorpe2017-11-181-0/+12
| | | | | | | | | | | The switchtec_ntb driver has a couple requirements on the switchec's hardware configuration so we add these notes to the documentation. Signed-off-by: Logan Gunthorpe <logang@deltatee.com> Reviewed-by: Stephen Bates <sbates@raithlin.com> Reviewed-by: Kurt Schwemmer <kurt.schwemmer@microsemi.com> Acked-by: Allen Hubbe <Allen.Hubbe@dell.com> Signed-off-by: Jon Mason <jdmason@kudzu.us>
* switchtec: Add IOCTLs to the Switchtec driverLogan Gunthorpe2017-04-121-0/+27
| | | | | | | | | | | | | | | | 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>
* switchtec: Add user interface documentationLogan Gunthorpe2017-04-121-0/+53
Add standard documentation for the sysfs switchtec attributes and a RST formatted text file which documents the char device interface. Jonathan Corbet has indicated he will move this to a new user-space developer documentation book once it's created. 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>