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authorXu Yilun <yilun.xu@intel.com>2020-06-16 12:08:46 +0800
committerMoritz Fischer <mdf@kernel.org>2020-07-06 21:35:42 -0700
commitd43f20bae5173ba431526040c320c36fdd4f086d (patch)
treeae078055368b49ebe8ad46ca370b815cf54676cf /drivers/fpga
parentfe6a3d6521227e49857d0d6caabbdae3bd4aef89 (diff)
downloadlinux-d43f20bae5173ba431526040c320c36fdd4f086d.tar.bz2
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 <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 'drivers/fpga')
-rw-r--r--drivers/fpga/dfl-fme-error.c18
-rw-r--r--drivers/fpga/dfl-fme-main.c6
2 files changed, 24 insertions, 0 deletions
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 <henry.mitchel@intel.com>
*/
+#include <linux/fpga-dfl.h>
#include <linux/uaccess.h>
#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,
};
diff --git a/drivers/fpga/dfl-fme-main.c b/drivers/fpga/dfl-fme-main.c
index fc210d4e1863..77ea04d4edbe 100644
--- a/drivers/fpga/dfl-fme-main.c
+++ b/drivers/fpga/dfl-fme-main.c
@@ -620,11 +620,17 @@ static int fme_release(struct inode *inode, struct file *filp)
{
struct dfl_feature_platform_data *pdata = filp->private_data;
struct platform_device *pdev = pdata->dev;
+ struct dfl_feature *feature;
dev_dbg(&pdev->dev, "Device File Release\n");
mutex_lock(&pdata->lock);
dfl_feature_dev_use_end(pdata);
+
+ if (!dfl_feature_dev_use_count(pdata))
+ dfl_fpga_dev_for_each_feature(pdata, feature)
+ dfl_fpga_set_irq_triggers(feature, 0,
+ feature->nr_irqs, NULL);
mutex_unlock(&pdata->lock);
return 0;