14cdadfd5SDan Williams.. SPDX-License-Identifier: GPL-2.0
24cdadfd5SDan Williams.. include:: <isonum.txt>
34cdadfd5SDan Williams
44cdadfd5SDan Williams===================================
54cdadfd5SDan WilliamsCompute Express Link Memory Devices
64cdadfd5SDan Williams===================================
74cdadfd5SDan Williams
84cdadfd5SDan WilliamsA Compute Express Link Memory Device is a CXL component that implements the
94cdadfd5SDan WilliamsCXL.mem protocol. It contains some amount of volatile memory, persistent memory,
104cdadfd5SDan Williamsor both. It is enumerated as a PCI device for configuration and passing
114cdadfd5SDan Williamsmessages over an MMIO mailbox. Its contribution to the System Physical
124cdadfd5SDan WilliamsAddress space is handled via HDM (Host Managed Device Memory) decoders
134cdadfd5SDan Williamsthat optionally define a device's contribution to an interleaved address
144cdadfd5SDan Williamsrange across multiple devices underneath a host-bridge or interleaved
154cdadfd5SDan Williamsacross host-bridges.
168adaf747SBen Widawsky
178adaf747SBen WidawskyDriver Infrastructure
188adaf747SBen Widawsky=====================
198adaf747SBen Widawsky
208adaf747SBen WidawskyThis section covers the driver infrastructure for a CXL memory device.
218adaf747SBen Widawsky
228adaf747SBen WidawskyCXL Memory Device
238adaf747SBen Widawsky-----------------
248adaf747SBen Widawsky
258adaf747SBen Widawsky.. kernel-doc:: drivers/cxl/mem.c
268adaf747SBen Widawsky   :doc: cxl mem
278adaf747SBen Widawsky
288adaf747SBen Widawsky.. kernel-doc:: drivers/cxl/mem.c
298adaf747SBen Widawsky   :internal:
30b39cb105SDan Williams
31*5f653f75SDan WilliamsCXL Core
32b39cb105SDan Williams-------
33*5f653f75SDan Williams.. kernel-doc:: drivers/cxl/core.c
34*5f653f75SDan Williams   :doc: cxl core
35583fa5e7SBen Widawsky
36583fa5e7SBen WidawskyExternal Interfaces
37583fa5e7SBen Widawsky===================
38583fa5e7SBen Widawsky
39583fa5e7SBen WidawskyCXL IOCTL Interface
40583fa5e7SBen Widawsky-------------------
41583fa5e7SBen Widawsky
42583fa5e7SBen Widawsky.. kernel-doc:: include/uapi/linux/cxl_mem.h
43583fa5e7SBen Widawsky   :doc: UAPI
44583fa5e7SBen Widawsky
45583fa5e7SBen Widawsky.. kernel-doc:: include/uapi/linux/cxl_mem.h
46583fa5e7SBen Widawsky   :internal:
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