From d43f20bae5173ba431526040c320c36fdd4f086d Mon Sep 17 00:00:00 2001 From: Xu Yilun Date: Tue, 16 Jun 2020 12:08:46 +0800 Subject: fpga: dfl: fme: add interrupt support for global error reporting Error reporting interrupt is very useful to notify users that some errors are detected by the hardware. Once users are notified, they could query hardware logged error states, no need to continuously poll on these states. This patch adds interrupt support for fme global error reporting sub feature. It follows the common DFL interrupt notification and handling mechanism. And it implements two ioctls below for user to query number of irqs supported, and set/unset interrupt triggers. Ioctls: * DFL_FPGA_FME_ERR_GET_IRQ_NUM get the number of irqs, which is used to determine whether/how many interrupts fme error reporting feature supports. * DFL_FPGA_FME_ERR_SET_IRQ set/unset given eventfds as fme error reporting interrupt triggers. Signed-off-by: Luwei Kang Signed-off-by: Wu Hao Signed-off-by: Xu Yilun Reviewed-by: Marcelo Tosatti Acked-by: Wu Hao Signed-off-by: Moritz Fischer --- drivers/fpga/dfl-fme-error.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'drivers/fpga/dfl-fme-error.c') diff --git a/drivers/fpga/dfl-fme-error.c b/drivers/fpga/dfl-fme-error.c index f897d414b923..51c2892ec06d 100644 --- a/drivers/fpga/dfl-fme-error.c +++ b/drivers/fpga/dfl-fme-error.c @@ -15,6 +15,7 @@ * Mitchel, Henry */ +#include #include #include "dfl.h" @@ -348,6 +349,22 @@ static void fme_global_err_uinit(struct platform_device *pdev, fme_err_mask(&pdev->dev, true); } +static long +fme_global_error_ioctl(struct platform_device *pdev, + struct dfl_feature *feature, + unsigned int cmd, unsigned long arg) +{ + switch (cmd) { + case DFL_FPGA_FME_ERR_GET_IRQ_NUM: + return dfl_feature_ioctl_get_num_irqs(pdev, feature, arg); + case DFL_FPGA_FME_ERR_SET_IRQ: + return dfl_feature_ioctl_set_irq(pdev, feature, arg); + default: + dev_dbg(&pdev->dev, "%x cmd not handled", cmd); + return -ENODEV; + } +} + const struct dfl_feature_id fme_global_err_id_table[] = { {.id = FME_FEATURE_ID_GLOBAL_ERR,}, {0,} @@ -356,4 +373,5 @@ const struct dfl_feature_id fme_global_err_id_table[] = { const struct dfl_feature_ops fme_global_err_ops = { .init = fme_global_err_init, .uinit = fme_global_err_uinit, + .ioctl = fme_global_error_ioctl, }; -- cgit v1.2.3-59-g8ed1b