tree d83a2aec040884c0b2ca411752a6e74b98b15f33
parent 5631f443a744fdf9250df933ed16d1b94b5245ba
author Janne Grunau <j@jannau.net> 1731308193 +0100
committer Tom Rini <trini@konsulko.com> 1731331604 -0600

lmb: Add basic io_lmb functionality

These functions can be used with struct lmb pointers and will be used to
manage IOVA space in the apple_dart iommu driver. This restores part of
the pointer base struct lmb API from before commit ed17a33fed29 ("lmb:
make LMB memory map persistent and global").
io_lmb_add() and io_lmb_free() can trivially reuse exisiting lmb
functions. io_lmb_setup() is separate for unique error log messages.
io_lmb_alloc() is a simplified copy of _lmb_alloc_base() since the
later has unused features and internal use of the global LMB memory map.

Signed-off-by: Janne Grunau <j@jannau.net>