| 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/<afu>/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/<afu>/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/<afu>/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/<afu>/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/<afu>/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/<afu>/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/<afu>/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/<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. |
| |
| What: /sys/class/cxl/<afu>/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/<afu>/cr<config num>/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/<afu>/cr<config num>/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/<afu>/cr<config num>/vendor |
| 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/<afu>/cr<config num>/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/<afu>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/<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. |
| |
| 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. |
| |
| |
| Card info (eg. /sys/class/cxl/card0) |
| |
| What: /sys/class/cxl/<card>/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/<card>/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/<card>/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/<card>/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/<card>/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/<card>/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. |
