Note: Attributes that are shared between devices are stored in the directory pointed to by the symlink device/. Example: The real path of the attribute /sys/class/cxl/afu0.0s/irqs_max is /sys/class/cxl/afu0.0s/device/irqs_max, i.e. /sys/class/cxl/afu0.0/irqs_max. Slave contexts (eg. /sys/class/cxl/afu0.0s): What: /sys/class/cxl//irqs_max Date: September 2014 Contact: linuxppc-dev@lists.ozlabs.org Description: read/write Decimal value of maximum number of interrupts that can be requested by userspace. The default on probe is the maximum that hardware can support (eg. 2037). Write values will limit userspace applications to that many userspace interrupts. Must be >= irqs_min. What: /sys/class/cxl//irqs_min Date: September 2014 Contact: linuxppc-dev@lists.ozlabs.org Description: read only Decimal value of the minimum number of interrupts that 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. What: /sys/class/cxl//mmio_size Date: September 2014 Contact: linuxppc-dev@lists.ozlabs.org Description: read only Decimal value of the size of the MMIO space that may be mmaped by userspace. What: /sys/class/cxl//modes_supported Date: September 2014 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" What: /sys/class/cxl//mode Date: September 2014 Contact: linuxppc-dev@lists.ozlabs.org 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. What: /sys/class/cxl//prefault_mode Date: September 2014 Contact: linuxppc-dev@lists.ozlabs.org Description: read/write Set the mode for prefaulting in segments into the segment table when performing the START_WORK ioctl. Possible values: none: No prefaulting (default) work_element_descriptor: Treat the work element descriptor as an effective address and prefault what it points to. all: all segments process calling START_WORK maps. What: /sys/class/cxl//reset Date: September 2014 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. What: /sys/class/cxl//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. What: /sys/class/cxl//api_version_compatible Date: September 2014 Contact: linuxppc-dev@lists.ozlabs.org Description: read only Decimal value of the the lowest version of the userspace API this this kernel supports. AFU configuration records (eg. /sys/class/cxl/afu0.0/cr0): An AFU may optionally export one or more PCIe like configuration records, known as AFU configuration records, which will show up here (if present). What: /sys/class/cxl//cr/vendor Date: February 2015 Contact: linuxppc-dev@lists.ozlabs.org Description: read only Hexadecimal value of the vendor ID found in this AFU configuration record. What: /sys/class/cxl//cr/device Date: February 2015 Contact: linuxppc-dev@lists.ozlabs.org Description: read only Hexadecimal value of the device ID found in this AFU configuration record. What: /sys/class/cxl//cr/class Date: February 2015 Contact: linuxppc-dev@lists.ozlabs.org Description: read only Hexadecimal value of the class code found in this AFU configuration record. What: /sys/class/cxl//cr/config Date: February 2015 Contact: linuxppc-dev@lists.ozlabs.org Description: read only This binary file provides raw access to the AFU configuration record. The format is expected to match the either the standard or extended configuration space defined by the PCIe specification. Master contexts (eg. /sys/class/cxl/afu0.0m) What: /sys/class/cxl/m/mmio_size Date: September 2014 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. What: /sys/class/cxl/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. What: /sys/class/cxl/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. Card info (eg. /sys/class/cxl/card0) What: /sys/class/cxl//caia_version Date: September 2014 Contact: linuxppc-dev@lists.ozlabs.org Description: read only Identifies the CAIA Version the card implements. What: /sys/class/cxl//psl_revision Date: September 2014 Contact: linuxppc-dev@lists.ozlabs.org Description: read only Identifies the revision level of the PSL. What: /sys/class/cxl//base_image Date: September 2014 Contact: linuxppc-dev@lists.ozlabs.org Description: read only Identifies the revision level of the base image for devices 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. What: /sys/class/cxl//image_loaded Date: September 2014 Contact: linuxppc-dev@lists.ozlabs.org Description: read only Will return "user" or "factory" depending on the image loaded onto the card. What: /sys/class/cxl//load_image_on_perst Date: December 2014 Contact: linuxppc-dev@lists.ozlabs.org Description: read/write Valid entries are "none", "user", and "factory". "none" means PERST will not cause image to be loaded to the card. A power cycle is required to load the image. "none" could be useful for debugging because the trace arrays are preserved. "user" and "factory" means PERST will cause either the user or user or factory image to be loaded. Default is to reload on PERST whichever image the card has loaded. What: /sys/class/cxl//reset Date: October 2014 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.