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authorXu Yilun <yilun.xu@intel.com>2020-06-16 07:08:45 +0300
committerMoritz Fischer <mdf@kernel.org>2020-07-07 07:34:46 +0300
commitfe6a3d6521227e49857d0d6caabbdae3bd4aef89 (patch)
treee3749f73f22fb11adad1810859fbcf83f4820dbe /drivers/fpga
parent322b598be4d9b9090cda560c4caab78704615ab4 (diff)
downloadlinux-fe6a3d6521227e49857d0d6caabbdae3bd4aef89.tar.xz
fpga: dfl: afu: add interrupt support for port 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 port error reporting sub feature. It follows the common DFL interrupt notification and handling mechanism, implements two ioctl commands below for user to query number of irqs supported, and set/unset interrupt triggers. Ioctls: * DFL_FPGA_PORT_ERR_GET_IRQ_NUM get the number of irqs, which is used to determine whether/how many interrupts error reporting feature supports. * DFL_FPGA_PORT_ERR_SET_IRQ set/unset given eventfds as error 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-afu-error.c17
-rw-r--r--drivers/fpga/dfl-afu-main.c4
2 files changed, 21 insertions, 0 deletions
diff --git a/drivers/fpga/dfl-afu-error.c b/drivers/fpga/dfl-afu-error.c
index c1467ae1a6b6..c4691187cca9 100644
--- a/drivers/fpga/dfl-afu-error.c
+++ b/drivers/fpga/dfl-afu-error.c
@@ -14,6 +14,7 @@
* Mitchel Henry <henry.mitchel@intel.com>
*/
+#include <linux/fpga-dfl.h>
#include <linux/uaccess.h>
#include "dfl-afu.h"
@@ -219,6 +220,21 @@ static void port_err_uinit(struct platform_device *pdev,
afu_port_err_mask(&pdev->dev, true);
}
+static long
+port_err_ioctl(struct platform_device *pdev, struct dfl_feature *feature,
+ unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case DFL_FPGA_PORT_ERR_GET_IRQ_NUM:
+ return dfl_feature_ioctl_get_num_irqs(pdev, feature, arg);
+ case DFL_FPGA_PORT_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 port_err_id_table[] = {
{.id = PORT_FEATURE_ID_ERROR,},
{0,}
@@ -227,4 +243,5 @@ const struct dfl_feature_id port_err_id_table[] = {
const struct dfl_feature_ops port_err_ops = {
.init = port_err_init,
.uinit = port_err_uinit,
+ .ioctl = port_err_ioctl,
};
diff --git a/drivers/fpga/dfl-afu-main.c b/drivers/fpga/dfl-afu-main.c
index b0c31789a909..357cd5d9b267 100644
--- a/drivers/fpga/dfl-afu-main.c
+++ b/drivers/fpga/dfl-afu-main.c
@@ -577,6 +577,7 @@ static int afu_release(struct inode *inode, struct file *filp)
{
struct platform_device *pdev = filp->private_data;
struct dfl_feature_platform_data *pdata;
+ struct dfl_feature *feature;
dev_dbg(&pdev->dev, "Device File Release\n");
@@ -586,6 +587,9 @@ static int afu_release(struct inode *inode, struct file *filp)
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);
__port_reset(pdev);
afu_dma_region_destroy(pdata);
}