Add a chain loading module to load new vmwgfx driver if kernel module is loaded

1 files changed, 142 insertions, 0 deletions

diff --git a/src/vmwaremodule.c b/src/vmwaremodule.c
new file mode 100644
index 0000000..826310b
--- /dev/null
+++ b/src/vmwaremodule.c
@@ -0,0 +1,142 @@
+/**********************************************************
+ * Copyright 2010 VMware, Inc.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy,
+ * modify, merge, publish, distribute, sublicense, and/or sell copies
+ * of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ **********************************************************/
+
+#include <xorg-server.h>
+#include <xf86.h>
+#include <xf86drm.h>
+
+
+/*
+ * Defines and exported module info.
+ */
+
+#define VMWARE_DRIVER_NAME    "vmware"
+#define VMWGFX_DRIVER_NAME    "vmwgfx"
+#define VMWLEGACY_DRIVER_NAME "vmwlegacy"
+
+#define VMWARE_VERSION_MAJOR 10
+#define VMWARE_VERSION_MINOR 16
+#define VMWARE_VERSION_PATCH 9
+
+static XF86ModuleVersionInfo vmware_version;
+static MODULESETUPPROTO(vmware_setup);
+
+_X_EXPORT XF86ModuleData vmwareModuleData = {
+    &vmware_version,
+    vmware_setup,
+    NULL
+};
+
+
+/*
+ * Chain loading functions
+ */
+
+static Bool
+vmware_check_kernel_module()
+{
+    /* Super simple way of knowing if the kernel driver is loaded */
+    int ret = drmOpen("vmwgfx", NULL);
+    if (ret < 0)
+	return FALSE;
+
+    drmClose(ret);
+
+    return TRUE;
+}
+
+static Bool
+vmware_chain_module(pointer opts)
+{
+    int vmwlegacy_devices;
+    int vmwgfx_devices;
+    int vmware_devices;
+    int matched;
+    char *driver_name;
+    GDevPtr *gdevs;
+    GDevPtr gdev;
+    int i;
+
+    vmware_devices = xf86MatchDevice(VMWARE_DRIVER_NAME, &gdevs);
+    vmwgfx_devices = xf86MatchDevice(VMWGFX_DRIVER_NAME, NULL);
+    vmwlegacy_devices = xf86MatchDevice(VMWLEGACY_DRIVER_NAME, NULL);
+
+    if (vmware_check_kernel_module()) {
+	driver_name = VMWGFX_DRIVER_NAME;
+	matched = vmwgfx_devices;
+    } else {
+	driver_name = VMWLEGACY_DRIVER_NAME;
+	matched = vmwlegacy_devices;
+    }
+
+    for (i = 0; i < vmware_devices; i++) {
+	gdev = gdevs[i];
+	gdev->driver = driver_name;
+    }
+
+    xfree(gdevs);
+
+    if (!matched)
+	xf86LoadOneModule(driver_name, opts);
+}
+
+
+/*
+ * Module info
+ */
+
+static XF86ModuleVersionInfo vmware_version = {
+    VMWARE_DRIVER_NAME,
+    MODULEVENDORSTRING,
+    MODINFOSTRING1,
+    MODINFOSTRING2,
+    XORG_VERSION_CURRENT,
+    VMWARE_VERSION_MAJOR, VMWARE_VERSION_MINOR, VMWARE_VERSION_PATCH,
+    ABI_CLASS_VIDEODRV,
+    ABI_VIDEODRV_VERSION,
+    MOD_CLASS_VIDEODRV,
+    {0, 0, 0, 0}
+};
+
+static pointer
+vmware_setup(pointer module, pointer opts, int *errmaj, int *errmin)
+{
+    static Bool setupDone = 0;
+    int ret;
+
+    /* This module should be loaded only once, but check to be sure. */
+    if (!setupDone) {
+	setupDone = 1;
+
+	/* Chain load the real driver */
+	vmware_chain_module(opts);
+
+	return (pointer) 1;
+    } else {
+	if (errmaj)
+	    *errmaj = LDR_ONCEONLY;
+	return NULL;
+    }
+}