From fd190564daa4cd530833a94606646730a5c0ee6c Mon Sep 17 00:00:00 2001
From: Jonathan Gray <jsg@jsg.id.au>
Date: Thu, 1 Dec 2016 15:18:42 +1100
Subject: [PATCH] xf86drm: implement drmParsePciBusInfo for OpenBSD

Implement drmParsePciBusInfo for OpenBSD by using the new
DRM_IOCTL_GET_PCIINFO ioctl.

v2: use drmGetMinorType to get node type instead of always
    using DRM_NODE_PRIMARY.

Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
---
 xf86drm.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/xf86drm.c b/xf86drm.c
index f0fc4ee2..56353812 100644
--- a/xf86drm.c
+++ b/xf86drm.c
@@ -2946,6 +2946,30 @@ static int drmParsePciBusInfo(int maj, int min, drmPciBusInfoPtr info)
     info->dev = dev;
     info->func = func;
 
+    return 0;
+#elif defined(__OpenBSD__)
+    struct drm_pciinfo pinfo;
+    int fd, type;
+
+    type = drmGetMinorType(min);
+    if (type == -1)
+        return -ENODEV;
+
+    fd = drmOpenMinor(min, 0, type);
+    if (fd < 0)
+        return -errno;
+
+    if (drmIoctl(fd, DRM_IOCTL_GET_PCIINFO, &pinfo)) {
+        close(fd);
+        return -errno;
+    }
+    close(fd);
+
+    info->domain = pinfo.domain;
+    info->bus = pinfo.bus;
+    info->dev = pinfo.dev;
+    info->func = pinfo.func;
+
     return 0;
 #else
 #warning "Missing implementation of drmParsePciBusInfo"