985f00a61c
Without this dependency relationship, the linker doesn't find the flash_register_slicer() function, so kldload fails to load fdt_slicer.ko. Discussed with: ian@
187 lines
5.2 KiB
C
187 lines
5.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2012 Semihalf.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/slicer.h>
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#include <dev/fdt/fdt_common.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/openfirm.h>
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#ifdef DEBUG
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#define debugf(fmt, args...) do { printf("%s(): ", __func__); \
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printf(fmt,##args); } while (0)
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#else
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#define debugf(fmt, args...)
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#endif
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static int fill_slices(device_t dev, const char *provider,
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struct flash_slice *slices, int *slices_num);
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static void fdt_slicer_init(void);
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static int
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fill_slices_from_node(phandle_t node, struct flash_slice *slices, int *count)
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{
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char *label;
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phandle_t child;
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u_long base, size;
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int flags, i;
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ssize_t nmlen;
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i = 0;
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for (child = OF_child(node); child != 0; child = OF_peer(child)) {
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flags = FLASH_SLICES_FLAG_NONE;
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/* Nodes with a compatible property are not slices. */
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if (OF_hasprop(child, "compatible"))
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continue;
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if (i == FLASH_SLICES_MAX_NUM) {
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debugf("not enough buffer for slice i=%d\n", i);
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break;
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}
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/* Retrieve start and size of the slice. */
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if (fdt_regsize(child, &base, &size) != 0) {
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debugf("error during processing reg property, i=%d\n",
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i);
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continue;
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}
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if (size == 0) {
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debugf("slice i=%d with no size\n", i);
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continue;
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}
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/* Retrieve label. */
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nmlen = OF_getprop_alloc(child, "label", (void **)&label);
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if (nmlen <= 0) {
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/* Use node name if no label defined */
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nmlen = OF_getprop_alloc(child, "name", (void **)&label);
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if (nmlen <= 0) {
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debugf("slice i=%d with no name\n", i);
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label = NULL;
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}
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}
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if (OF_hasprop(child, "read-only"))
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flags |= FLASH_SLICES_FLAG_RO;
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/* Fill slice entry data. */
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slices[i].base = base;
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slices[i].size = size;
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slices[i].label = label;
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slices[i].flags = flags;
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i++;
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}
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*count = i;
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return (0);
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}
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static int
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fill_slices(device_t dev, const char *provider __unused,
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struct flash_slice *slices, int *slices_num)
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{
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phandle_t child, node;
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/*
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* We assume the caller provides buffer for FLASH_SLICES_MAX_NUM
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* flash_slice structures.
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*/
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if (slices == NULL) {
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*slices_num = 0;
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return (ENOMEM);
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}
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node = ofw_bus_get_node(dev);
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/*
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* If there is a child node whose compatible is "fixed-partitions" then
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* we have new-style data where all partitions are the children of that
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* node. Otherwise we have old-style data where all the children of the
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* device node are the partitions.
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*/
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child = fdt_find_compatible(node, "fixed-partitions", false);
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if (child == 0)
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return fill_slices_from_node(node, slices, slices_num);
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else
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return fill_slices_from_node(child, slices, slices_num);
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}
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static void
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fdt_slicer_init(void)
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{
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flash_register_slicer(fill_slices, FLASH_SLICES_TYPE_NAND, false);
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flash_register_slicer(fill_slices, FLASH_SLICES_TYPE_CFI, false);
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flash_register_slicer(fill_slices, FLASH_SLICES_TYPE_SPI, false);
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}
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static void
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fdt_slicer_cleanup(void)
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{
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flash_register_slicer(NULL, FLASH_SLICES_TYPE_NAND, true);
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flash_register_slicer(NULL, FLASH_SLICES_TYPE_CFI, true);
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flash_register_slicer(NULL, FLASH_SLICES_TYPE_SPI, true);
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}
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/*
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* Must be initialized after GEOM classes (SI_SUB_DRIVERS/SI_ORDER_FIRST),
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* i. e. after g_init() is called, due to the use of the GEOM topology_lock
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* in flash_register_slicer(). However, must be before SI_SUB_CONFIGURE.
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*/
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SYSINIT(fdt_slicer, SI_SUB_DRIVERS, SI_ORDER_SECOND, fdt_slicer_init, NULL);
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SYSUNINIT(fdt_slicer, SI_SUB_DRIVERS, SI_ORDER_SECOND, fdt_slicer_cleanup, NULL);
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static int
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mod_handler(module_t mod, int type, void *data)
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{
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/*
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* Nothing to do here: the SYSINIT/SYSUNINIT defined above run
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* automatically at module load/unload time.
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*/
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return (0);
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}
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static moduledata_t fdt_slicer_mod = {
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"fdt_slicer", mod_handler, NULL
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};
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DECLARE_MODULE(fdt_slicer, fdt_slicer_mod, SI_SUB_DRIVERS, SI_ORDER_SECOND);
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MODULE_DEPEND(fdt_slicer, g_flashmap, 0, 0, 0);
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MODULE_VERSION(fdt_slicer, 1);
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