mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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825d150875
Introduce an initial driver for CXL 2.0 Type-3 Memory Devices. CXL is
Compute Express Link which released the 2.0 specification in November.
The Linux relevant changes in CXL 2.0 are support for an OS to
dynamically assign address space to memory devices, support for
switches, persistent memory, and hotplug. A Type-3 Memory Device is a
PCI enumerated device presenting the CXL Memory Device Class Code and
implementing the CXL.mem protocol. CXL.mem allows device to advertise
CPU and I/O coherent memory to the system, i.e. typical "System RAM" and
"Persistent Memory" in Linux /proc/iomem terms.
In addition to the CXL.mem fast path there is an administrative command
hardware mailbox interface for maintenance and provisioning. It is this
command interface that is the focus of the initial driver. With this
driver a CXL device that is mapped by the BIOS can be administered by
Linux. Linux support for CXL PMEM and dynamic CXL address space
management are to be implemented post v5.12.
4cdadfd5e0a7 cxl/mem: Introduce a driver for CXL-2.0-Type-3 endpoints
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
8adaf747c9f0 cxl/mem: Find device capabilities
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
b39cb1052a5c cxl/mem: Register CXL memX devices
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
13237183c735 cxl/mem: Add a "RAW" send command
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
472b1ce6e9d6 cxl/mem: Enable commands via CEL
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
57ee605b976c cxl/mem: Add set of informational commands
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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Merge tag 'cxl-for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull initial support for CXL (Compute Express Link) from Dan Williams:
"Introduce an initial driver for CXL 2.0 Type-3 Memory Devices.
CXL is Compute Express Link which released the 2.0 specification in
November. The Linux relevant changes in CXL 2.0 are support for an OS
to dynamically assign address space to memory devices, support for
switches, persistent memory, and hotplug.
A Type-3 Memory Device is a PCI enumerated device presenting the CXL
Memory Device Class Code and implementing the CXL.mem protocol.
CXL.mem allows device to advertise CPU and I/O coherent memory to the
system, i.e. typical "System RAM" and "Persistent Memory" in Linux
/proc/iomem terms.
In addition to the CXL.mem fast path there is an administrative
command hardware mailbox interface for maintenance and provisioning.
It is this command interface that is the focus of the initial driver.
With this driver a CXL device that is mapped by the BIOS can be
administered by Linux.
Linux support for CXL PMEM and dynamic CXL address space management
are to be implemented post v5.12"
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
4cdadfd5e0a7 ("cxl/mem: Introduce a driver for CXL-2.0-Type-3 endpoints")
13237183c735 ("cxl/mem: Add a "RAW" send command")
472b1ce6e9d6 ("cxl/mem: Enable commands via CEL")
57ee605b976c ("cxl/mem: Add set of informational commands")
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
8adaf747c9f0 ("cxl/mem: Find device capabilities")
b39cb1052a5c ("cxl/mem: Register CXL memX devices")
* tag 'cxl-for-5.12' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
cxl/mem: Fix potential memory leak
cxl/mem: Return -EFAULT if copy_to_user() fails
MAINTAINERS: Add maintainers of the CXL driver
cxl/mem: Add set of informational commands
cxl/mem: Enable commands via CEL
cxl/mem: Add a "RAW" send command
cxl/mem: Add basic IOCTL interface
cxl/mem: Register CXL memX devices
cxl/mem: Find device capabilities
cxl/mem: Introduce a driver for CXL-2.0-Type-3 endpoints
118 lines
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ReStructuredText
========================================
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The Linux driver implementer's API guide
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========================================
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The kernel offers a wide variety of interfaces to support the development
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of device drivers. This document is an only somewhat organized collection
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of some of those interfaces — it will hopefully get better over time! The
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available subsections can be seen below.
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.. class:: toc-title
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Table of contents
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.. toctree::
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:maxdepth: 2
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driver-model/index
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basics
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infrastructure
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ioctl
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early-userspace/index
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pm/index
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clk
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|
device-io
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|
dma-buf
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|
device_link
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|
component
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|
message-based
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|
infiniband
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|
frame-buffer
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|
regulator
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|
reset
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iio/index
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|
input
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|
usb/index
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firewire
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pci/index
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cxl/index
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spi
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i2c
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ipmb
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ipmi
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i3c/index
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interconnect
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devfreq
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hsi
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edac
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scsi
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libata
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target
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mailbox
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mtdnand
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miscellaneous
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mei/index
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mtd/index
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mmc/index
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nvdimm/index
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w1
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rapidio/index
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s390-drivers
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vme
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80211/index
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uio-howto
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firmware/index
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pinctl
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gpio/index
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md/index
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media/index
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misc_devices
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nfc/index
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dmaengine/index
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slimbus
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soundwire/index
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thermal/index
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fpga/index
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acpi/index
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auxiliary_bus
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backlight/lp855x-driver.rst
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connector
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console
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dcdbas
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eisa
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isa
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isapnp
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io-mapping
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io_ordering
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generic-counter
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lightnvm-pblk
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memory-devices/index
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men-chameleon-bus
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ntb
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nvmem
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parport-lowlevel
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pps
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ptp
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phy/index
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pti_intel_mid
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pwm
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pldmfw/index
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rfkill
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serial/index
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sm501
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surface_aggregator/index
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switchtec
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sync_file
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vfio-mediated-device
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vfio
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xilinx/index
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xillybus
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zorro
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.. only:: subproject and html
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Indices
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=======
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* :ref:`genindex`
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