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cxl: Document external user of existing API

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Now that libcxl is public, let's document it.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Neuling 2015-05-27 16:07:01 +10:00 committed by Michael Ellerman
parent abeeed6d3d
commit aee85fb6ba
2 changed files with 26 additions and 0 deletions
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22
Documentation/ABI/testing/sysfs-class-cxl
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@ -26,6 +26,7 @@ Description: read/write
that hardware can support (eg. 2037). Write values will limit
userspace applications to that many userspace interrupts. Must
be >= irqs_min.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>/irqs_min
Date: September 2014
@ -35,6 +36,7 @@ Description: read only
userspace must request on a CXL_START_WORK ioctl. Userspace may
omit the num_interrupts field in the START_WORK IOCTL to get
this minimum automatically.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>/mmio_size
Date: September 2014
@ -42,6 +44,7 @@ Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
Decimal value of the size of the MMIO space that may be mmaped
by userspace.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>/modes_supported
Date: September 2014
@ -49,6 +52,7 @@ Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
List of the modes this AFU supports. One per line.
Valid entries are: "dedicated_process" and "afu_directed"
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>/mode
Date: September 2014
@ -57,6 +61,7 @@ Description: read/write
The current mode the AFU is using. Will be one of the modes
given in modes_supported. Writing will change the mode
provided that no user contexts are attached.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>/prefault_mode
@ -70,6 +75,7 @@ Description: read/write
descriptor as an effective address and
prefault what it points to.
all: all segments process calling START_WORK maps.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>/reset
Date: September 2014
@ -77,12 +83,14 @@ Contact: linuxppc-dev@lists.ozlabs.org
Description: write only
Writing 1 here will reset the AFU provided there are not
contexts active on the AFU.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>/api_version
Date: September 2014
Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
Decimal value of the current version of the kernel/user API.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>/api_version_compatible
Date: September 2014
@ -90,6 +98,7 @@ Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
Decimal value of the the lowest version of the userspace API
this this kernel supports.
Users: https://github.com/ibm-capi/libcxl
AFU configuration records (eg. /sys/class/cxl/afu0.0/cr0):
@ -103,6 +112,7 @@ Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
Hexadecimal value of the vendor ID found in this AFU
configuration record.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>/cr<config num>/device
Date: February 2015
@ -110,6 +120,7 @@ Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
Hexadecimal value of the device ID found in this AFU
configuration record.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>/cr<config num>/class
Date: February 2015
@ -117,6 +128,7 @@ Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
Hexadecimal value of the class code found in this AFU
configuration record.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>/cr<config num>/config
Date: February 2015
@ -126,6 +138,7 @@ Description: read only
record. The format is expected to match the either the standard
or extended configuration space defined by the PCIe
specification.
Users: https://github.com/ibm-capi/libcxl
@ -137,18 +150,21 @@ Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
Decimal value of the size of the MMIO space that may be mmaped
by userspace. This includes all slave contexts space also.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>m/pp_mmio_len
Date: September 2014
Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
Decimal value of the Per Process MMIO space length.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<afu>m/pp_mmio_off
Date: September 2014
Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
Decimal value of the Per Process MMIO space offset.
Users: https://github.com/ibm-capi/libcxl
Card info (eg. /sys/class/cxl/card0)
@ -158,12 +174,14 @@ Date: September 2014
Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
Identifies the CAIA Version the card implements.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<card>/psl_revision
Date: September 2014
Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
Identifies the revision level of the PSL.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<card>/base_image
Date: September 2014
@ -173,6 +191,7 @@ Description: read only
that support loadable PSLs. For FPGAs this field identifies
the image contained in the on-adapter flash which is loaded
during the initial program load.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<card>/image_loaded
Date: September 2014
@ -180,6 +199,7 @@ Contact: linuxppc-dev@lists.ozlabs.org
Description: read only
Will return "user" or "factory" depending on the image loaded
onto the card.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<card>/load_image_on_perst
Date: December 2014
@ -194,6 +214,7 @@ Description: read/write
user or factory image to be loaded.
Default is to reload on PERST whichever image the card has
loaded.
Users: https://github.com/ibm-capi/libcxl
What: /sys/class/cxl/<card>/reset
Date: October 2014
@ -201,3 +222,4 @@ Contact: linuxppc-dev@lists.ozlabs.org
Description: write only
Writing 1 will issue a PERST to card which may cause the card
to reload the FPGA depending on load_image_on_perst.
Users: https://github.com/ibm-capi/libcxl

4
Documentation/powerpc/cxl.txt
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@ -133,6 +133,9 @@ User API
The following file operations are supported on both slave and
master devices.
A userspace library libcxl is avaliable here:
https://github.com/ibm-capi/libcxl
This provides a C interface to this kernel API.
open
----
@ -366,6 +369,7 @@ Sysfs Class
enumeration and tuning of the accelerators. Its layout is
described in Documentation/ABI/testing/sysfs-class-cxl
Udev rules
==========