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| author | Xiao Guangrong <guangrong.xiao@linux.intel.com> | 2018-06-30 08:53:34 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-07-15 13:55:47 +0200 |
| commit | 857a26222ff75eecf7d701ef0e91e4fbf6efa663 (patch) | |
| tree | 5e8ec7a739d2e65ce87e8456d1f3884257293300 /Documentation/ABI | |
| parent | 6fd893c409e5939ea2145b27796c155535988734 (diff) | |
| download | lwn-857a26222ff75eecf7d701ef0e91e4fbf6efa663.tar.gz lwn-857a26222ff75eecf7d701ef0e91e4fbf6efa663.zip | |
fpga: dfl: afu: add afu sub feature support
User Accelerated Function Unit sub feature exposes the MMIO region of
the AFU. After valid PR bitstream is programmed and the port is enabled,
then this MMIO region could be accessed.
This patch adds support to enumerate the AFU MMIO region and expose it
to userspace via mmap file operation. Below interfaces are exposed to user:
Sysfs interface:
* /sys/class/fpga_region/<regionX>/<dfl-port.x>/afu_id
Read-only. Indicate which PR bitstream is programmed to this AFU.
Ioctl interfaces:
* DFL_FPGA_PORT_GET_INFO
Provide info to userspace on the number of supported region.
Only UAFU region is supported now.
* DFL_FPGA_PORT_GET_REGION_INFO
Provide region information, including access permission, region size,
offset from the start of device fd.
Signed-off-by: Tim Whisonant <tim.whisonant@intel.com>
Signed-off-by: Enno Luebbers <enno.luebbers@intel.com>
Signed-off-by: Shiva Rao <shiva.rao@intel.com>
Signed-off-by: Christopher Rauer <christopher.rauer@intel.com>
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Wu Hao <hao.wu@intel.com>
Acked-by: Alan Tull <atull@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-platform-dfl-port | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-platform-dfl-port b/Documentation/ABI/testing/sysfs-platform-dfl-port index cb91165f5397..6a92dda517b0 100644 --- a/Documentation/ABI/testing/sysfs-platform-dfl-port +++ b/Documentation/ABI/testing/sysfs-platform-dfl-port @@ -5,3 +5,12 @@ Contact: Wu Hao <hao.wu@intel.com> Description: Read-only. It returns id of this port. One DFL FPGA device may have more than one port. Userspace could use this id to distinguish different ports under same FPGA device. + +What: /sys/bus/platform/devices/dfl-port.0/afu_id +Date: June 2018 +KernelVersion: 4.19 +Contact: Wu Hao <hao.wu@intel.com> +Description: Read-only. User can program different PR bitstreams to FPGA + Accelerator Function Unit (AFU) for different functions. It + returns uuid which could be used to identify which PR bitstream + is programmed in this AFU. |