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From 5a0718f03d4da66682d5580e156c6cf4b8005891 Mon Sep 17 00:00:00 2001
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From: Tarun Gupta <tgupta@redhat.com>
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Date: Wed, 20 Jun 2018 18:54:23 +0200
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Subject: [PATCH 15/17] vfio/display: core & wireup
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RH-Author: Tarun Gupta <tgupta@redhat.com>
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Message-id: <1529520865-18127-10-git-send-email-tgupta@redhat.com>
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Patchwork-id: 80918
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O-Subject: [RHEL7.6 qemu-kvm PATCH v3 09/11] vfio/display: core & wireup
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Bugzilla: 1555246
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RH-Acked-by: Alex Williamson <alex.williamson@redhat.com>
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RH-Acked-by: Gerd Hoffmann <kraxel@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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nfrastructure for display support.  Must be enabled
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using 'display' property.
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Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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Reviewed By: Kirti Wankhede <kwankhede@nvidia.com>
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Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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(cherry picked from a9994687cb9b5f72399398a0985419f4d2b95dc5)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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 hw/misc/vfio.c | 40 ++++++++++++++++++++++++++++++++++++++++
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 1 file changed, 40 insertions(+)
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diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c
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index 414b689..22d5cac 100644
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--- a/hw/misc/vfio.c
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+++ b/hw/misc/vfio.c
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@@ -40,6 +40,7 @@
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 #include "sysemu/kvm.h"
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 #include "sysemu/sysemu.h"
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 #include "trace.h"
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+#include "ui/console.h"
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 /* #define DEBUG_VFIO */
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 #ifdef DEBUG_VFIO
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@@ -235,6 +236,7 @@ typedef struct VFIOPCIDevice {
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 #define VFIO_FEATURE_ENABLE_VGA (1 << VFIO_FEATURE_ENABLE_VGA_BIT)
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 #define VFIO_FEATURE_ENABLE_REQ_BIT 1
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 #define VFIO_FEATURE_ENABLE_REQ (1 << VFIO_FEATURE_ENABLE_REQ_BIT)
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+    OnOffAuto display;
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     int32_t bootindex;
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     uint8_t pm_cap;
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     bool has_vga;
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@@ -2760,6 +2762,33 @@ static int vfio_region_mmap(VFIORegion *region)
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     return 0;
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 }
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+static int vfio_display_probe(VFIOPCIDevice *vdev)
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+{
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+    struct vfio_device_gfx_plane_info probe;
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+    int ret;
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+
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+    memset(&probe, 0, sizeof(probe));
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+    probe.argsz = sizeof(probe);
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+    probe.flags = VFIO_GFX_PLANE_TYPE_PROBE | VFIO_GFX_PLANE_TYPE_REGION;
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+    ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_QUERY_GFX_PLANE, &probe);
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+    if (ret == 0) {
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+        error_report("vfio-display: region support not implemented yet");
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+        return -1;
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+    }
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+
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+    if (vdev->display == ON_OFF_AUTO_AUTO) {
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+        /* not an error in automatic mode */
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+        return 0;
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+    }
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+
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+    error_report("vfio: device doesn't support any (known) display method");
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+    return -1;
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+}
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+
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+static void vfio_display_finalize(VFIOPCIDevice *vdev)
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+{
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+}
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+
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 static void vfio_region_exit(VFIORegion *region)
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 {
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     int i;
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@@ -4232,6 +4261,14 @@ static int vfio_initfn(PCIDevice *pdev)
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     }
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     add_boot_device_path(vdev->bootindex, &pdev->qdev, NULL);
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+
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+    if (vdev->display != ON_OFF_AUTO_OFF) {
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+        ret = vfio_display_probe(vdev);
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+        if (ret) {
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+            goto out_teardown;
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+        }
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+    }
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+
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     vfio_register_err_notifier(vdev);
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     vfio_register_req_notifier(vdev);
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@@ -4261,6 +4298,7 @@ static void vfio_exitfn(PCIDevice *pdev)
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         qemu_free_timer(vdev->intx.mmap_timer);
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     }
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     vfio_teardown_msi(vdev);
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+    vfio_display_finalize(vdev);
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     vfio_unmap_bars(vdev);
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     g_free(vdev->emulated_config_bits);
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     g_free(vdev->rom);
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@@ -4313,6 +4351,8 @@ static void vfio_instance_init(Object *obj)
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 static Property vfio_pci_dev_properties[] = {
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     DEFINE_PROP_PCI_HOST_DEVADDR("host", VFIOPCIDevice, host),
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     DEFINE_PROP_STRING("sysfsdev", VFIOPCIDevice, vbasedev.sysfsdev),
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+    DEFINE_PROP_ON_OFF_AUTO("display", VFIOPCIDevice,
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+                            display, ON_OFF_AUTO_AUTO),
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     DEFINE_PROP_UINT32("x-intx-mmap-timeout-ms", VFIOPCIDevice,
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                        intx.mmap_timeout, 1100),
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     DEFINE_PROP_BIT("x-vga", VFIOPCIDevice, features,
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-- 
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1.8.3.1
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