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authorMax Laier <mlaier@FreeBSD.org>2006-01-29 02:52:42 +0000
committerMax Laier <mlaier@FreeBSD.org>2006-01-29 02:52:42 +0000
commit6aec1278dc6fd4790208608ee99bdc84dcf0b3da (patch)
tree079b229b1f501b3c6590ffcfca8239fa263fc270 /sys/sys/firmware.h
parent69e99c5d4c348234b9a40ff14d4586e44e74eb63 (diff)
downloadsrc-6aec1278dc6fd4790208608ee99bdc84dcf0b3da.tar.gz
src-6aec1278dc6fd4790208608ee99bdc84dcf0b3da.zip
firmware(9) is a subsystem to load binary data into the kernel via a
specially crafted module. There are several handrolled sollutions to this problem in the tree already which will be replaced with this. They include iwi(4), ipw(4), ispfw(4) and digi(4). No objection from: arch MFC after: 2 weeks X-MFC after: some drivers have been converted
Notes
Notes: svn path=/head/; revision=154974
Diffstat (limited to 'sys/sys/firmware.h')
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diff --git a/sys/sys/firmware.h b/sys/sys/firmware.h
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+/*-
+ * Copyright (c) 2005, Sam Leffler <sam@errno.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice unmodified, this list of conditions, and the following
+ * disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+#ifndef _SYS_FIRMWARE_H_
+#define _SYS_FIRMWARE_H_
+/*
+ * Loadable firmware support.
+ *
+ * Firmware images are embedded in kernel loadable modules that can
+ * be loaded on-demand or pre-loaded as desired. Modules may contain
+ * one or more firmware images that are stored as opaque data arrays
+ * and registered with a unique string name. Consumers request
+ * firmware by name with held references counted to use in disallowing
+ * module/data unload.
+ *
+ * When multiple images are stored in one module the one image is
+ * treated as the master with the other images holding references
+ * to it. This means that to unload the module each dependent/subimage
+ * must first have its references removed.
+ */
+struct firmware {
+ const char *name; /* system-wide name */
+ const void *data; /* location of image */
+ size_t datasize; /* size of image in bytes */
+ unsigned int version; /* version of the image */
+ int refcnt; /* held references */
+ struct firmware *parent; /* not null if a subimage */
+ linker_file_t file; /* loadable module */
+};
+
+struct firmware *firmware_register(const char *, const void *, size_t,
+ unsigned int, struct firmware *);
+int firmware_unregister(const char *);
+struct firmware *firmware_get(const char *);
+#define FIRMWARE_UNLOAD 0x0001 /* unload if unreferenced */
+void firmware_put(struct firmware *, int);
+#endif /* _SYS_FIRMWARE_H_ */