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[src/trunk]: src/sys/dev/flash Add support for defining partitions using a Li...
details: https://anonhg.NetBSD.org/src/rev/ae87945da76b
branches: trunk
changeset: 827814:ae87945da76b
user: jmcneill <jmcneill%NetBSD.org@localhost>
date: Mon Nov 13 17:35:58 2017 +0000
description:
Add support for defining partitions using a Linux-style "mtdparts" string.
diffstat:
sys/dev/flash/files.flash | 5 +-
sys/dev/flash/flash.c | 22 +---
sys/dev/flash/flash.h | 4 +-
sys/dev/flash/flash_mtdparts.c | 196 +++++++++++++++++++++++++++++++++++++++++
4 files changed, 209 insertions(+), 18 deletions(-)
diffs (286 lines):
diff -r b4ee852fd462 -r ae87945da76b sys/dev/flash/files.flash
--- a/sys/dev/flash/files.flash Mon Nov 13 15:01:16 2017 +0000
+++ b/sys/dev/flash/files.flash Mon Nov 13 17:35:58 2017 +0000
@@ -1,10 +1,11 @@
-# $NetBSD: files.flash,v 1.2 2011/06/28 18:14:11 ahoka Exp $
+# $NetBSD: files.flash,v 1.3 2017/11/13 17:35:58 jmcneill Exp $
-define flashbus { [offset = 0], [size = 0], [readonly = 0] }
+define flashbus { [offset = 0], [size = 0], [readonly = 0], [dynamic = 0] }
device flash
attach flash at flashbus
file dev/flash/flash.c flash
file dev/flash/flash_io.c flash
+file dev/flash/flash_mtdparts.c flash
defflag opt_flash.h FLASH_STATIC_PARTITIONS
diff -r b4ee852fd462 -r ae87945da76b sys/dev/flash/flash.c
--- a/sys/dev/flash/flash.c Mon Nov 13 15:01:16 2017 +0000
+++ b/sys/dev/flash/flash.c Mon Nov 13 17:35:58 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: flash.c,v 1.13 2017/10/28 04:53:55 riastradh Exp $ */
+/* $NetBSD: flash.c,v 1.14 2017/11/13 17:35:58 jmcneill Exp $ */
/*-
* Copyright (c) 2011 Department of Software Engineering,
@@ -37,7 +37,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: flash.c,v 1.13 2017/10/28 04:53:55 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: flash.c,v 1.14 2017/11/13 17:35:58 jmcneill Exp $");
#include <sys/param.h>
#include <sys/types.h>
@@ -147,20 +147,12 @@
aprint_naive("\n");
- switch (sc->flash_if->type) {
- case FLASH_TYPE_NOR:
- aprint_normal(": NOR flash partition size %s, offset %#jx",
- pbuf[0], (uintmax_t )sc->sc_partinfo.part_offset);
- break;
+ aprint_normal(": partition");
+ if (sc->sc_partinfo.part_name != NULL)
+ aprint_normal(" \"%s\"", sc->sc_partinfo.part_name);
- case FLASH_TYPE_NAND:
- aprint_normal(": NAND flash partition size %s, offset %#jx",
- pbuf[0], (uintmax_t )sc->sc_partinfo.part_offset);
- break;
-
- default:
- aprint_normal(": %s unknown flash", pbuf[0]);
- }
+ aprint_normal(", size %s, offset %#jx",
+ pbuf[0], (uintmax_t)sc->sc_partinfo.part_offset);
if (sc->sc_partinfo.part_flags & FLASH_PART_READONLY) {
sc->sc_readonly = true;
diff -r b4ee852fd462 -r ae87945da76b sys/dev/flash/flash.h
--- a/sys/dev/flash/flash.h Mon Nov 13 15:01:16 2017 +0000
+++ b/sys/dev/flash/flash.h Mon Nov 13 17:35:58 2017 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: flash.h,v 1.7 2011/07/29 20:48:33 ahoka Exp $ */
+/* $NetBSD: flash.h,v 1.8 2017/11/13 17:35:58 jmcneill Exp $ */
/*-
* Copyright (c) 2011 Department of Software Engineering,
@@ -53,6 +53,7 @@
flash_off_t part_offset;
flash_size_t part_size;
int part_flags;
+ const char *part_name;
};
/**
@@ -120,6 +121,7 @@
};
device_t flash_attach_mi(struct flash_interface *, device_t);
+void flash_attach_mtdparts(struct flash_interface *, device_t, flash_size_t, const char *, const char *);
const struct flash_interface *flash_get_interface(dev_t);
const struct flash_softc *flash_get_softc(dev_t);
device_t flash_get_device(dev_t);
diff -r b4ee852fd462 -r ae87945da76b sys/dev/flash/flash_mtdparts.c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/dev/flash/flash_mtdparts.c Mon Nov 13 17:35:58 2017 +0000
@@ -0,0 +1,196 @@
+/* $NetBSD: flash_mtdparts.c,v 1.1 2017/11/13 17:35:58 jmcneill Exp $ */
+
+/*-
+ * Copyright (c) 2017 Jared McNeill <jmcneill%invisible.ca@localhost>
+ * 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, 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.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: flash_mtdparts.c,v 1.1 2017/11/13 17:35:58 jmcneill Exp $");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/device.h>
+#include <sys/systm.h>
+#include <sys/kmem.h>
+
+#include <dev/flash/flash.h>
+
+extern int flash_print(void *, const char *);
+
+static void
+flash_attach_partition(struct flash_interface *flash_if, device_t parent,
+ struct flash_partition *part)
+{
+ struct flash_attach_args faa;
+
+ faa.flash_if = flash_if;
+ faa.partinfo = *part;
+
+ config_found_ia(parent, "flashbus", &faa, flash_print);
+}
+
+static flash_size_t
+flash_parse_size(char *partdef, char **ep)
+{
+ flash_size_t size;
+
+ /* Parse the size parameter */
+ size = strtoul(partdef, ep, 10);
+ if (partdef == *ep)
+ return 0;
+
+ switch (**ep) {
+ case 'G':
+ case 'g':
+ size <<= 10;
+ /* FALLTHROUGH */
+ case 'M':
+ case 'm':
+ size <<= 10;
+ /* FALLTHROUGH */
+ case 'K':
+ case 'k':
+ size <<= 10;
+ (*ep)++;
+ break;
+ }
+
+ return size;
+}
+
+static int
+flash_parse_partdef(flash_size_t flash_size, char *partdef, flash_off_t *offset,
+ struct flash_partition *ppart)
+{
+ struct flash_partition part;
+
+ /* Get the partition size */
+ if (*partdef == '-') {
+ /* Use the remaining space */
+ part.part_size = 0;
+ partdef++;
+ } else {
+ part.part_size = flash_parse_size(partdef, &partdef);
+ if (part.part_size == 0)
+ return EINVAL;
+ }
+
+ if (*partdef == '@') {
+ /* Explicit offset */
+ partdef++;
+ part.part_offset = flash_parse_size(partdef, &partdef);
+ } else {
+ /* Offset is the end of the previous partition */
+ part.part_offset = *offset;
+ }
+
+ /* Calculate partition size for "all remaining space" parts */
+ if (part.part_size == 0)
+ part.part_size = flash_size - part.part_offset;
+
+ if (*partdef == '(') {
+ /* Partition name */
+ partdef++;
+ part.part_name = partdef;
+ partdef = strchr(partdef, ')');
+ if (partdef == NULL)
+ return EINVAL;
+ *partdef = '\0';
+ partdef++;
+ }
+
+ part.part_flags = 0;
+ if (strncmp(partdef, "ro", 2) == 0) {
+ part.part_flags |= FLASH_PART_READONLY;
+ partdef += 2;
+ }
+
+ *ppart = part;
+
+ *offset = part.part_offset + part.part_size;
+
+ return 0;
+}
+
+static void
+flash_parse_mtddef(struct flash_interface *flash_if, device_t parent,
+ flash_size_t flash_size, char *mtddef)
+{
+ struct flash_partition part;
+ char *partdef = mtddef, *nextdef;
+ flash_off_t offset = 0;
+ int error;
+
+ while (partdef && offset < flash_size) {
+ /* Find the end */
+ nextdef = strchr(partdef, ',');
+ if (nextdef == NULL)
+ nextdef = strchr(partdef, ' ');
+ if (nextdef)
+ *nextdef++ = '\0';
+
+ error = flash_parse_partdef(flash_size, partdef, &offset,
+ &part);
+ if (error) {
+ aprint_error_dev(parent, "bad partition def '%s'\n",
+ partdef);
+ return;
+ }
+
+ flash_attach_partition(flash_if, parent, &part);
+
+ partdef = nextdef;
+ }
+}
+
+/*
+ * Attach partitions to a given parent device node that match the supplied
+ * device id. The cmdline follows the following format:
+ *
+ * mtdparts=<mtddef>[;<mtddef]
+ * <mtddef> := <mtd-id>:<partdef>[,<partdef>]
+ * <partdef> := <size>[@offset][<name>][ro]
+ * <mtd-id> := unique id used in mapping driver/device (number of flash bank)
+ * <size> := memsize OR "-" to denote all remaining space
+ * <name> := '(' NAME ')'
+ */
+void
+flash_attach_mtdparts(struct flash_interface *flash_if, device_t parent,
+ flash_size_t flash_size, const char *mtd_id, const char *cmdline)
+{
+ char *mtddef;
+ size_t mtddeflen;
+
+ /* Find the definition for our mtd id */
+ const char *s = strstr(cmdline, mtd_id);
+ if (s == NULL || s[strlen(mtd_id)] != ':')
+ return;
+
+ mtddef = kmem_strdupsize(s + strlen(mtd_id) + 1, &mtddeflen, KM_SLEEP);
+
+ flash_parse_mtddef(flash_if, parent, flash_size, mtddef);
+
+ kmem_free(mtddef, mtddeflen);
+}
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