1 files changed, 84 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowof.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowof.c
new file mode 100644
index 000000000..4bf486b57
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowof.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2012 Red Hat Inc.
+ *
+ * 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 "priv.h"
+
+#include <core/pci.h>
+
+#if defined(__powerpc__)
+struct priv {
+	const void __iomem *data;
+	int size;
+};
+
+static u32
+of_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios)
+{
+	struct priv *priv = data;
+	if (offset < priv->size) {
+		length = min_t(u32, length, priv->size - offset);
+		memcpy_fromio(bios->data + offset, priv->data + offset, length);
+		return length;
+	}
+	return 0;
+}
+
+static u32
+of_size(void *data)
+{
+	struct priv *priv = data;
+	return priv->size;
+}
+
+static void *
+of_init(struct nvkm_bios *bios, const char *name)
+{
+	struct nvkm_device *device = bios->subdev.device;
+	struct pci_dev *pdev = device->func->pci(device)->pdev;
+	struct device_node *dn;
+	struct priv *priv;
+	if (!(dn = pci_device_to_OF_node(pdev)))
+		return ERR_PTR(-ENODEV);
+	if (!(priv = kzalloc(sizeof(*priv), GFP_KERNEL)))
+		return ERR_PTR(-ENOMEM);
+	if ((priv->data = of_get_property(dn, "NVDA,BMP", &priv->size)))
+		return priv;
+	kfree(priv);
+	return ERR_PTR(-EINVAL);
+}
+
+const struct nvbios_source
+nvbios_of = {
+	.name = "OpenFirmware",
+	.init = of_init,
+	.fini = (void(*)(void *))kfree,
+	.read = of_read,
+	.size = of_size,
+	.rw = false,
+	.ignore_checksum = true,
+	.no_pcir = true,
+};
+#else
+const struct nvbios_source
+nvbios_of = {
+};
+#endif