1 files changed, 109 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/core/firmware.c b/drivers/gpu/drm/nouveau/nvkm/core/firmware.c
new file mode 100644
index 000000000..ca1f8463c
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nvkm/core/firmware.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 2016, NVIDIA CORPORATION. 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 <core/device.h>
+#include <core/firmware.h>
+
+int
+nvkm_firmware_load_name(const struct nvkm_subdev *subdev, const char *base,
+			const char *name, int ver, const struct firmware **pfw)
+{
+	char path[64];
+	int ret;
+
+	snprintf(path, sizeof(path), "%s%s", base, name);
+	ret = nvkm_firmware_get(subdev, path, ver, pfw);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+int
+nvkm_firmware_load_blob(const struct nvkm_subdev *subdev, const char *base,
+			const char *name, int ver, struct nvkm_blob *blob)
+{
+	const struct firmware *fw;
+	int ret;
+
+	ret = nvkm_firmware_load_name(subdev, base, name, ver, &fw);
+	if (ret == 0) {
+		blob->data = kmemdup(fw->data, fw->size, GFP_KERNEL);
+		blob->size = fw->size;
+		nvkm_firmware_put(fw);
+		if (!blob->data)
+			return -ENOMEM;
+	}
+
+	return ret;
+}
+
+/**
+ * nvkm_firmware_get - load firmware from the official nvidia/chip/ directory
+ * @subdev:	subdevice that will use that firmware
+ * @fwname:	name of firmware file to load
+ * @ver:	firmware version to load
+ * @fw:		firmware structure to load to
+ *
+ * Use this function to load firmware files in the form nvidia/chip/fwname.bin.
+ * Firmware files released by NVIDIA will always follow this format.
+ */
+int
+nvkm_firmware_get(const struct nvkm_subdev *subdev, const char *fwname, int ver,
+		  const struct firmware **fw)
+{
+	struct nvkm_device *device = subdev->device;
+	char f[64];
+	char cname[16];
+	int i;
+
+	/* Convert device name to lowercase */
+	strncpy(cname, device->chip->name, sizeof(cname));
+	cname[sizeof(cname) - 1] = '\0';
+	i = strlen(cname);
+	while (i) {
+		--i;
+		cname[i] = tolower(cname[i]);
+	}
+
+	if (ver != 0)
+		snprintf(f, sizeof(f), "nvidia/%s/%s-%d.bin", cname, fwname, ver);
+	else
+		snprintf(f, sizeof(f), "nvidia/%s/%s.bin", cname, fwname);
+
+	if (!firmware_request_nowarn(fw, f, device->dev)) {
+		nvkm_debug(subdev, "firmware \"%s\" loaded - %zu byte(s)\n",
+			   f, (*fw)->size);
+		return 0;
+	}
+
+	nvkm_debug(subdev, "firmware \"%s\" unavailable\n", f);
+	return -ENOENT;
+}
+
+/*
+ * nvkm_firmware_put - release firmware loaded with nvkm_firmware_get
+ */
+void
+nvkm_firmware_put(const struct firmware *fw)
+{
+	release_firmware(fw);
+}