New upstream version 17.08

[deb_dpdk.git] / lib / librte_eal / linuxapp / igb_uio / igb_uio.c

diff --git a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
index b9d427c..07a19a3 100644 (file)
--- a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
+++ b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
@@ -170,6 +170,37 @@ igbuio_pci_irqhandler(int irq, struct uio_info *info)
        return IRQ_HANDLED;
 }
 
+/**
+ * This gets called while opening uio device file.
+ */
+static int
+igbuio_pci_open(struct uio_info *info, struct inode *inode)
+{
+       struct rte_uio_pci_dev *udev = info->priv;
+       struct pci_dev *dev = udev->pdev;
+
+       pci_reset_function(dev);
+
+       /* set bus master, which was cleared by the reset function */
+       pci_set_master(dev);
+
+       return 0;
+}
+
+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;
+
+       /* stop the device from further DMA */
+       pci_clear_master(dev);
+
+       pci_reset_function(dev);
+
+       return 0;
+}
+
 #ifdef CONFIG_XEN_DOM0
 static int
 igbuio_dom0_mmap_phys(struct uio_info *info, struct vm_area_struct *vma)
@@ -372,6 +403,8 @@ igbuio_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
        udev->info.version = "0.1";
        udev->info.handler = igbuio_pci_irqhandler;
        udev->info.irqcontrol = igbuio_pci_irqcontrol;
+       udev->info.open = igbuio_pci_open;
+       udev->info.release = igbuio_pci_release;
 #ifdef CONFIG_XEN_DOM0
        /* check if the driver run on Xen Dom0 */
        if (xen_initial_domain())