hw/pvrdma: Clean device's resource when system is shutdown

In order to clean some external resources such as GIDs, QPs etc,
register to receive notification when VM is shutdown.
Signed-off-by: NYuval Shaia <yuval.shaia@oracle.com>
Reviewed-by: NMarcel Apfelbaum <marcel.apfelbaum@gmail.com>
Signed-off-by: NMarcel Apfelbaum <marcel.apfelbaum@gmail.com>

hw/rdma/vmw/pvrdma.h

@@ -17,6 +17,7 @@
 #define PVRDMA_PVRDMA_H
 
 #include "qemu/units.h"
+#include "qemu/notify.h"
 #include "hw/pci/pci.h"
 #include "hw/pci/msix.h"
 #include "chardev/char-fe.h"
@@ -87,6 +88,7 @@ typedef struct PVRDMADev {
     RdmaDeviceResources rdma_dev_res;
     CharBackend mad_chr;
     VMXNET3State *func0;
+    Notifier shutdown_notifier;
 } PVRDMADev;
 #define PVRDMA_DEV(dev) OBJECT_CHECK(PVRDMADev, (dev), PVRDMA_HW_NAME)
 

hw/rdma/vmw/pvrdma_main.c

@@ -24,6 +24,7 @@
 #include "hw/qdev-properties.h"
 #include "cpu.h"
 #include "trace.h"
+#include "sysemu/sysemu.h"
 
 #include "../rdma_rm.h"
 #include "../rdma_backend.h"
@@ -334,6 +335,9 @@ static void pvrdma_fini(PCIDevice *pdev)
     if (msix_enabled(pdev)) {
         uninit_msix(pdev, RDMA_MAX_INTRS);
     }
+
+    pr_dbg("Device %s %x.%x is down\n", pdev->name, PCI_SLOT(pdev->devfn),
+           PCI_FUNC(pdev->devfn));
 }
 
 static void pvrdma_stop(PVRDMADev *dev)
@@ -559,6 +563,14 @@ static int pvrdma_check_ram_shared(Object *obj, void *opaque)
     return 0;
 }
 
+static void pvrdma_shutdown_notifier(Notifier *n, void *opaque)
+{
+    PVRDMADev *dev = container_of(n, PVRDMADev, shutdown_notifier);
+    PCIDevice *pci_dev = PCI_DEVICE(dev);
+
+    pvrdma_fini(pci_dev);
+}
+
 static void pvrdma_realize(PCIDevice *pdev, Error **errp)
 {
     int rc;
@@ -632,6 +644,9 @@ static void pvrdma_realize(PCIDevice *pdev, Error **errp)
         goto out;
     }
 
+    dev->shutdown_notifier.notify = pvrdma_shutdown_notifier;
+    qemu_register_shutdown_notifier(&dev->shutdown_notifier);
+
 out:
     if (rc) {
         error_append_hint(errp, "Device fail to load\n");