From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: From: Xu Yilun Subject: [PATCH v3 7/7] Documentation: fpga: dfl: add descriptions for interrupt related interfaces. Date: Tue, 24 Mar 2020 16:32:43 +0800 Message-Id: <1585038763-22944-8-git-send-email-yilun.xu@intel.com> In-Reply-To: <1585038763-22944-1-git-send-email-yilun.xu@intel.com> References: <1585038763-22944-1-git-send-email-yilun.xu@intel.com> To: mdf@kernel.org, linux-fpga@vger.kernel.org, linux-kernel@vger.kernel.org Cc: trix@redhat.com, bhu@redhat.com, Xu Yilun , Luwei Kang , Wu Hao List-ID: This patch adds introductions of interrupt related interfaces for FME error reporting, port error reporting and AFU user interrupts features. Signed-off-by: Luwei Kang Signed-off-by: Wu Hao Signed-off-by: Xu Yilun ---- v2: Update Documents cause change of irq ioctl interfaces. v3: No change --- Documentation/fpga/dfl.rst | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/Documentation/fpga/dfl.rst b/Documentation/fpga/dfl.rst index 094fc8a..c7ed3e4 100644 --- a/Documentation/fpga/dfl.rst +++ b/Documentation/fpga/dfl.rst @@ -89,6 +89,8 @@ The following functions are exposed through ioctls: - Program bitstream (DFL_FPGA_FME_PORT_PR) - Assign port to PF (DFL_FPGA_FME_PORT_ASSIGN) - Release port from PF (DFL_FPGA_FME_PORT_RELEASE) +- Get number of irqs of FME global error (DFL_FPGA_FME_ERR_GET_IRQ_NUM) +- Set interrupt trigger for FME error (DFL_FPGA_FME_ERR_SET_IRQ) More functions are exposed through sysfs (/sys/class/fpga_region/regionX/dfl-fme.n/): @@ -144,6 +146,10 @@ The following functions are exposed through ioctls: - Map DMA buffer (DFL_FPGA_PORT_DMA_MAP) - Unmap DMA buffer (DFL_FPGA_PORT_DMA_UNMAP) - Reset AFU (DFL_FPGA_PORT_RESET) +- Get number of irqs of port error (DFL_FPGA_PORT_ERR_GET_IRQ_NUM) +- Set interrupt trigger for port error (DFL_FPGA_PORT_ERR_SET_IRQ) +- Get number of irqs of UINT (DFL_FPGA_PORT_UINT_GET_IRQ_NUM) +- Set interrupt trigger for UINT (DFL_FPGA_PORT_UINT_SET_IRQ) DFL_FPGA_PORT_RESET: reset the FPGA Port and its AFU. Userspace can do Port @@ -378,6 +384,17 @@ The device nodes used for ioctl() or mmap() can be referenced through:: /sys/class/fpga_region///dev +Interrupt support +================= +Some FME and AFU private features are able to generate interrupts. As mentioned +above, users could call ioctl (DFL_FPGA_*_GET_IRQ_NUM) to know whether or how +many interrupts are supported for this private feature. Drivers also implement +an eventfd based interrupt handling mechanism for users to get notified when +interrupt happens. Users could set eventfds to driver via +ioctl (DFL_FPGA_*_SET_IRQ), and then poll/select on these eventfds waiting for +notification. + + Add new FIUs support ==================== It's possible that developers made some new function blocks (FIUs) under this -- 2.7.4