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From dde4b959d6722bc2ebc5cd247b4e21055d2f0abd Mon Sep 17 00:00:00 2001
From: Alex Williamson <alex.williamson@redhat.com>
Date: Fri, 29 Sep 2017 21:44:35 +0200
Subject: [PATCH 05/27] hw/vfio/pci: add type, name and group fields in
 VFIODevice

RH-Author: Alex Williamson <alex.williamson@redhat.com>
Message-id: <20170929214435.16765.27045.stgit@gimli.home>
Patchwork-id: 76763
O-Subject: [RHEL-7.5 qemu-kvm PATCH 05/16] hw/vfio/pci: add type, name and group fields in VFIODevice
Bugzilla: 1494181
RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
RH-Acked-by: Auger Eric <eric.auger@redhat.com>
RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>

From: Eric Auger <eric.auger@linaro.org>

Upstream: 462037c9e85b27149e71d7f5c7f41375ca6e47d5

Add 3 new fields in the VFIODevice struct. Type is set to
VFIO_DEVICE_TYPE_PCI. The type enum value will later be used
to discriminate between VFIO PCI and platform devices. The name is
set to domain:bus:slot:function. Currently used to test whether
the device already is attached to the group. Later on, the name
will be used to simplify all traces. The group is simply moved
from VFIOPCIDevice to VFIODevice.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
[Fix g_strdup_printf() usage]
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
 hw/misc/vfio.c | 27 ++++++++++++++++++---------
 1 file changed, 18 insertions(+), 9 deletions(-)

diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c
index 340d967..cc151e2 100644
--- a/hw/misc/vfio.c
+++ b/hw/misc/vfio.c
@@ -55,6 +55,10 @@
 #define VFIO_ALLOW_KVM_MSI 1
 #define VFIO_ALLOW_KVM_MSIX 1
 
+enum {
+    VFIO_DEVICE_TYPE_PCI = 0,
+};
+
 struct VFIOPCIDevice;
 
 typedef struct VFIOQuirk {
@@ -175,7 +179,10 @@ typedef struct VFIOMSIXInfo {
 } VFIOMSIXInfo;
 
 typedef struct VFIODevice {
+    struct VFIOGroup *group;
+    char *name;
     int fd;
+    int type;
 } VFIODevice;
 
 typedef struct VFIOPCIDevice {
@@ -197,7 +204,6 @@ typedef struct VFIOPCIDevice {
     VFIOVGA vga; /* 0xa0000, 0x3b0, 0x3c0 */
     PCIHostDeviceAddress host;
     QLIST_ENTRY(VFIOPCIDevice) next;
-    struct VFIOGroup *group;
     EventNotifier err_notifier;
     EventNotifier req_notifier;
     uint32_t features;
@@ -3526,7 +3532,7 @@ static int vfio_get_device(VFIOGroup *group, const char *name,
     }
 
     vdev->vbasedev.fd = ret;
-    vdev->group = group;
+    vdev->vbasedev.group = group;
     QLIST_INSERT_HEAD(&group->device_list, vdev, next);
 
     /* Sanity check device */
@@ -3658,7 +3664,7 @@ static int vfio_get_device(VFIOGroup *group, const char *name,
 error:
     if (ret) {
         QLIST_REMOVE(vdev, next);
-        vdev->group = NULL;
+        vdev->vbasedev.group = NULL;
         close(vdev->vbasedev.fd);
     }
     return ret;
@@ -3667,9 +3673,10 @@ error:
 static void vfio_put_device(VFIOPCIDevice *vdev)
 {
     QLIST_REMOVE(vdev, next);
-    vdev->group = NULL;
+    vdev->vbasedev.group = NULL;
     DPRINTF("vfio_put_device: close vdev->vbasedev.fd\n");
     close(vdev->vbasedev.fd);
+    g_free(vdev->vbasedev.name);
     if (vdev->msix) {
         g_free(vdev->msix);
         vdev->msix = NULL;
@@ -3904,6 +3911,11 @@ static int vfio_initfn(PCIDevice *pdev)
         return -errno;
     }
 
+    vdev->vbasedev.type = VFIO_DEVICE_TYPE_PCI;
+    vdev->vbasedev.name = g_strdup_printf("%04x:%02x:%02x.%01x",
+                                          vdev->host.domain, vdev->host.bus,
+                                          vdev->host.slot, vdev->host.function);
+
     strncat(path, "iommu_group", sizeof(path) - strlen(path) - 1);
 
     len = readlink(path, iommu_group_path, sizeof(path));
@@ -3934,10 +3946,7 @@ static int vfio_initfn(PCIDevice *pdev)
             vdev->host.function);
 
     QLIST_FOREACH(pvdev, &group->device_list, next) {
-        if (pvdev->host.domain == vdev->host.domain &&
-            pvdev->host.bus == vdev->host.bus &&
-            pvdev->host.slot == vdev->host.slot &&
-            pvdev->host.function == vdev->host.function) {
+        if (strcmp(pvdev->vbasedev.name, vdev->vbasedev.name) == 0) {
 
             error_report("vfio: error: device %s is already attached", path);
             vfio_put_group(group);
@@ -4042,7 +4051,7 @@ out_put:
 static void vfio_exitfn(PCIDevice *pdev)
 {
     VFIOPCIDevice *vdev = DO_UPCAST(VFIOPCIDevice, pdev, pdev);
-    VFIOGroup *group = vdev->group;
+    VFIOGroup *group = vdev->vbasedev.group;
 
     vfio_unregister_req_notifier(vdev);
     vfio_unregister_err_notifier(vdev);
-- 
1.8.3.1