cxl/core: Enforce partition order/simplify partition calls

Device partitions share one flat DPA space in a fixed order: static
volatile capacity at DPA 0, static persistent capacity immediately above
it, and dynamic capacity above all static capacity.  The static pair is
mandated by CXL r4.0 8.2.10.9.2.1 "Get Partition Info", Table 8-310: the
device "shall provide this volatile capacity starting at DPA 0" and
"shall provide this persistent capacity starting at the DPA immediately
following the volatile capacity".  Dynamic capacity has no such rule.
Table 8-347 only requires the region base to be 256M aligned, so placing
it directly above static capacity is a Linux requirement,
enforced by cxl_configure_dcd().

    DPA 0                                                     end
    +---------------+---------------+---------------------------+
    |      ram      |     pmem      |       dynamic_ram_1       |
    +---------------+---------------+---------------------------+
    part[0]         part[1]         part[2]

Signed-off-by: Ira Weiny <iweiny@kernel.org>
Co-developed-by: Anisa Su <anisa.su@samsung.com>
Signed-off-by: Anisa Su <anisa.su@samsung.com>
Tested-by: Wonjae Lee <wj28.lee@samsung.com>
Tested-by: Junhee Park <jh9934.park@samsung.com>
Tested-by: Heesoo Kim <habil.kim@samsung.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Link: https://patch.msgid.link/20261010225852.10727-8-anisa.su@samsung.com
Signed-off-by: Dave Jiang <dave.jiang@intel.com>

0 files changed, 0 insertions, 0 deletions