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| author | Xu Yilun <yilun.xu@intel.com> | 2020-06-16 12:08:48 +0800 |
|---|---|---|
| committer | Moritz Fischer <mdf@kernel.org> | 2020-07-06 21:37:42 -0700 |
| commit | 8adfb7c694d911669eb65256c760b3e250db1df5 (patch) | |
| tree | 186391159466ddf0eb90f0453deedd2c4dd3809e /Documentation/fpga | |
| parent | 09d86150141955ba1b3d7cbef23785f4996e4d6f (diff) | |
| download | linux-8adfb7c694d911669eb65256c760b3e250db1df5.tar.bz2 | |
Documentation: fpga: dfl: add descriptions for interrupt related interfaces.
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 <luwei.kang@intel.com>
Signed-off-by: Wu Hao <hao.wu@intel.com>
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Acked-by: Wu Hao <hao.wu@intel.com>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Diffstat (limited to 'Documentation/fpga')
| -rw-r--r-- | Documentation/fpga/dfl.rst | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/Documentation/fpga/dfl.rst b/Documentation/fpga/dfl.rst index 978c4af416a4..2df9a0a0e981 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/): @@ -149,6 +151,10 @@ 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 @@ -462,6 +468,19 @@ since they are system-wide counters on FPGA device. The current driver does not support sampling. So "perf record" is unsupported. +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. +In Current DFL, 3 sub features (Port error, FME global error and AFU interrupt) +support interrupts. + + Add new FIUs support ==================== It's possible that developers made some new function blocks (FIUs) under this |