Effectively the only way to recover from errors in the communication
with pcid is by restarting the driver from scratch possibly after
restarting pcid. As such moving the aborts from individual drivers to
pcid_interface simplifies drivers while at the same time allowing nicer
error messages.
If unaligned_length is for example 8193, the initial reservation would
be rounded up to the next page resulting in 12288. However the physmap
would previously round up to the next power of two forming 16384,
potentially overwriting one page of data directly after the reservation.
In case of bigger allocations, more pages could be overwritten.
This will make it easier to change the way logging is done for all
drivers. This also fixes the log category for a couple of drivers as
well as makes failing to set the logger a fatal error. Only when a
logger is already set is it impossible to set another logger.
The current frame allocator limits requests to powers of two, between 4
KiB and 4 MiB. As such, a 8-bit color 1920x1080 framebuffer needs at
least two allocations.
bjorn3