Initial import

1 files changed, 170 insertions, 0 deletions

diff --git a/include/linux/firmware.h b/include/linux/firmware.h
new file mode 100644
index 000000000..92156e687
--- /dev/null
+++ b/include/linux/firmware.h
@@ -0,0 +1,170 @@
+#ifndef _LINUX_FIRMWARE_H
+#define _LINUX_FIRMWARE_H
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+#include <linux/gfp.h>
+
+#define FW_ACTION_NOHOTPLUG 0
+#define FW_ACTION_HOTPLUG 1
+
+struct firmware {
+	size_t size;
+	const u8 *data;
+	struct page **pages;
+
+	/* firmware loader private fields */
+	void *priv;
+};
+
+struct module;
+struct device;
+
+struct builtin_fw {
+	char *name;
+	void *data;
+	unsigned long size;
+};
+
+/* We have to play tricks here much like stringify() to get the
+   __COUNTER__ macro to be expanded as we want it */
+#define __fw_concat1(x, y) x##y
+#define __fw_concat(x, y) __fw_concat1(x, y)
+
+#define DECLARE_BUILTIN_FIRMWARE(name, blob)				     \
+	DECLARE_BUILTIN_FIRMWARE_SIZE(name, &(blob), sizeof(blob))
+
+#define DECLARE_BUILTIN_FIRMWARE_SIZE(name, blob, size)			     \
+	static const struct builtin_fw __fw_concat(__builtin_fw,__COUNTER__) \
+	__used __section(.builtin_fw) = { name, blob, size }
+
+#if defined(CONFIG_FW_LOADER) || (defined(CONFIG_FW_LOADER_MODULE) && defined(MODULE))
+int request_firmware(const struct firmware **fw, const char *name,
+		     struct device *device);
+int request_firmware_nowait(
+	struct module *module, bool uevent,
+	const char *name, struct device *device, gfp_t gfp, void *context,
+	void (*cont)(const struct firmware *fw, void *context));
+int request_firmware_direct(const struct firmware **fw, const char *name,
+			    struct device *device);
+
+void release_firmware(const struct firmware *fw);
+#else
+static inline int request_firmware(const struct firmware **fw,
+				   const char *name,
+				   struct device *device)
+{
+	return -EINVAL;
+}
+static inline int request_firmware_nowait(
+	struct module *module, bool uevent,
+	const char *name, struct device *device, gfp_t gfp, void *context,
+	void (*cont)(const struct firmware *fw, void *context))
+{
+	return -EINVAL;
+}
+
+static inline void release_firmware(const struct firmware *fw)
+{
+}
+
+static inline int request_firmware_direct(const struct firmware **fw,
+					  const char *name,
+					  struct device *device)
+{
+	return -EINVAL;
+}
+
+#endif
+#ifndef _LINUX_LIBRE_FIRMWARE_H
+#define _LINUX_LIBRE_FIRMWARE_H
+
+#include <linux/device.h>
+
+#define NONFREE_FIRMWARE "/*(DEBLOBBED)*/"
+
+static inline int
+is_nonfree_firmware(const char *name)
+{
+  return strstr(name, NONFREE_FIRMWARE) != 0;
+}
+
+static inline int
+report_missing_free_firmware(const char *name, const char *what)
+{
+	printk(KERN_ERR "%s: Missing Free %s (non-Free firmware loading is disabled)\n", name,
+	       what ? what : "firmware");
+	return -EINVAL;
+}
+static inline int
+reject_firmware(const struct firmware **fw,
+		const char *name, struct device *device)
+{
+	const struct firmware *xfw = NULL;
+	int retval;
+	report_missing_free_firmware(dev_name(device), NULL);
+	retval = request_firmware(&xfw, NONFREE_FIRMWARE, device);
+	if (!retval)
+		release_firmware(xfw);
+	return -EINVAL;
+}
+static inline int
+maybe_reject_firmware(const struct firmware **fw,
+		      const char *name, struct device *device)
+{
+	if (is_nonfree_firmware(name))
+		return reject_firmware(fw, name, device);
+	else
+		return request_firmware(fw, name, device);
+}
+static inline int
+reject_firmware_direct(const struct firmware **fw,
+		const char *name, struct device *device)
+{
+	const struct firmware *xfw = NULL;
+	int retval;
+	report_missing_free_firmware(dev_name(device), NULL);
+	retval = request_firmware_direct(&xfw, NONFREE_FIRMWARE, device);
+	if (!retval)
+		release_firmware(xfw);
+	return -EINVAL;
+}
+static inline void
+discard_rejected_firmware(const struct firmware *fw, void *context)
+{
+	release_firmware(fw);
+}
+static inline int
+reject_firmware_nowait(struct module *module, int uevent,
+		       const char *name, struct device *device,
+		       gfp_t gfp, void *context,
+		       void (*cont)(const struct firmware *fw,
+				    void *context))
+{
+	int retval;
+	report_missing_free_firmware(dev_name(device), NULL);
+	retval = request_firmware_nowait(module, uevent, NONFREE_FIRMWARE,
+					 device, gfp, NULL,
+					 discard_rejected_firmware);
+	if (retval)
+		return retval;
+	return -EINVAL;
+}
+static inline int
+maybe_reject_firmware_nowait(struct module *module, int uevent,
+			     const char *name, struct device *device,
+			     gfp_t gfp, void *context,
+			     void (*cont)(const struct firmware *fw,
+					  void *context))
+{
+	if (is_nonfree_firmware(name))
+		return reject_firmware_nowait(module, uevent, name,
+					      device, gfp, context, cont);
+	else
+		return request_firmware_nowait(module, uevent, name,
+					       device, gfp, context, cont);
+}
+
+#endif /* _LINUX_LIBRE_FIRMWARE_H */
+
+#endif