[dpdk-dev] igb_uio: reset PCI function on process exit
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Commit Message
re-bind PCI function to igb_uio
after process termination
tested adapters: Intel 10G, Intel 40G
known issues: ENA adapters on AWS I3 instances fail to reset PCI function
Signed-off-by: Gregory Etelson <gregory@weka.io>
---
lib/librte_eal/linuxapp/igb_uio/igb_uio.c | 12 ++++++++++++
1 files changed, 12 insertions(+), 0 deletions(-)
Comments
On 6/6/2017 7:03 AM, Gregory Etelson wrote:
> re-bind PCI function to igb_uio
> after process termination
> tested adapters: Intel 10G, Intel 40G
> known issues: ENA adapters on AWS I3 instances fail to reset PCI function
>
> Signed-off-by: Gregory Etelson <gregory@weka.io>
Shijith's patch [1] applied in 17.08 superseded this patch, updating it
in patchwork.
[1]
Commit: b58eedfc7dd5 ("igb_uio: issue FLR during open and release of
device file")
@@ -317,6 +317,17 @@ struct rte_uio_pci_dev {
return (iom != 0 || iop != 0) ? ret : -ENOENT;
}
+static int
+igbuio_pci_release(struct uio_info *info, struct inode *inode)
+{
+ struct rte_uio_pci_dev *udev = info->priv;
+ struct pci_dev *dev = udev->pdev;
+
+ int ret = __pci_reset_function(dev);
+ dev_info(&udev->pdev->dev, "PCI reset %s\n", !ret ? "done" : "failed");
+ return 0;
+}
+
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 8, 0)
static int __devinit
#else
@@ -372,6 +383,7 @@ struct rte_uio_pci_dev {
udev->info.version = "0.1";
udev->info.handler = igbuio_pci_irqhandler;
udev->info.irqcontrol = igbuio_pci_irqcontrol;
+ udev->info.release = igbuio_pci_release;
#ifdef CONFIG_XEN_DOM0
/* check if the driver run on Xen Dom0 */
if (xen_initial_domain())