From 857a26222ff75eecf7d701ef0e91e4fbf6efa663 Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Sat, 30 Jun 2018 08:53:34 +0800 Subject: 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///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 Signed-off-by: Enno Luebbers Signed-off-by: Shiva Rao Signed-off-by: Christopher Rauer Signed-off-by: Xiao Guangrong Signed-off-by: Wu Hao Acked-by: Alan Tull Signed-off-by: Greg Kroah-Hartman --- Documentation/ABI/testing/sysfs-platform-dfl-port | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'Documentation/ABI') 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 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 +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. -- cgit v1.2.3