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freebsd-skq/sys/dev/ofw/ofw_bus_subr.c

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2001 - 2003 by Thomas Moestl <tmm@FreeBSD.org>.
* Copyright (c) 2005 Marius Strobl <marius@FreeBSD.org>
* 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,
* without modification, immediately at the beginning of the file.
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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>
__FBSDID("$FreeBSD$");
#include "opt_platform.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/errno.h>
#include <sys/libkern.h>
#include <machine/resource.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/openfirm.h>
#include "ofw_bus_if.h"
#define OFW_COMPAT_LEN 255
#define OFW_STATUS_LEN 16
int
ofw_bus_gen_setup_devinfo(struct ofw_bus_devinfo *obd, phandle_t node)
{
if (obd == NULL)
return (ENOMEM);
/* The 'name' property is considered mandatory. */
if ((OF_getprop_alloc(node, "name", 1, (void **)&obd->obd_name)) == -1)
return (EINVAL);
OF_getprop_alloc(node, "compatible", 1, (void **)&obd->obd_compat);
OF_getprop_alloc(node, "device_type", 1, (void **)&obd->obd_type);
OF_getprop_alloc(node, "model", 1, (void **)&obd->obd_model);
OF_getprop_alloc(node, "status", 1, (void **)&obd->obd_status);
obd->obd_node = node;
return (0);
}
void
ofw_bus_gen_destroy_devinfo(struct ofw_bus_devinfo *obd)
{
if (obd == NULL)
return;
if (obd->obd_compat != NULL)
free(obd->obd_compat, M_OFWPROP);
if (obd->obd_model != NULL)
free(obd->obd_model, M_OFWPROP);
if (obd->obd_name != NULL)
free(obd->obd_name, M_OFWPROP);
if (obd->obd_type != NULL)
free(obd->obd_type, M_OFWPROP);
if (obd->obd_status != NULL)
free(obd->obd_status, M_OFWPROP);
}
int
ofw_bus_gen_child_pnpinfo_str(device_t cbdev, device_t child, char *buf,
size_t buflen)
{
*buf = '\0';
if (ofw_bus_get_name(child) != NULL) {
strlcat(buf, "name=", buflen);
strlcat(buf, ofw_bus_get_name(child), buflen);
}
if (ofw_bus_get_compat(child) != NULL) {
strlcat(buf, " compat=", buflen);
strlcat(buf, ofw_bus_get_compat(child), buflen);
}
return (0);
};
const char *
ofw_bus_gen_get_compat(device_t bus, device_t dev)
{
const struct ofw_bus_devinfo *obd;
obd = OFW_BUS_GET_DEVINFO(bus, dev);
if (obd == NULL)
return (NULL);
return (obd->obd_compat);
}
const char *
ofw_bus_gen_get_model(device_t bus, device_t dev)
{
const struct ofw_bus_devinfo *obd;
obd = OFW_BUS_GET_DEVINFO(bus, dev);
if (obd == NULL)
return (NULL);
return (obd->obd_model);
}
const char *
ofw_bus_gen_get_name(device_t bus, device_t dev)
{
const struct ofw_bus_devinfo *obd;
obd = OFW_BUS_GET_DEVINFO(bus, dev);
if (obd == NULL)
return (NULL);
return (obd->obd_name);
}
phandle_t
ofw_bus_gen_get_node(device_t bus, device_t dev)
{
const struct ofw_bus_devinfo *obd;
obd = OFW_BUS_GET_DEVINFO(bus, dev);
if (obd == NULL)
return (0);
return (obd->obd_node);
}
const char *
ofw_bus_gen_get_type(device_t bus, device_t dev)
{
const struct ofw_bus_devinfo *obd;
obd = OFW_BUS_GET_DEVINFO(bus, dev);
if (obd == NULL)
return (NULL);
return (obd->obd_type);
}
const char *
ofw_bus_get_status(device_t dev)
{
const struct ofw_bus_devinfo *obd;
obd = OFW_BUS_GET_DEVINFO(device_get_parent(dev), dev);
if (obd == NULL)
return (NULL);
return (obd->obd_status);
}
int
ofw_bus_status_okay(device_t dev)
{
const char *status;
status = ofw_bus_get_status(dev);
if (status == NULL || strcmp(status, "okay") == 0 ||
strcmp(status, "ok") == 0)
return (1);
return (0);
}
int
ofw_bus_node_status_okay(phandle_t node)
{
char status[OFW_STATUS_LEN];
int len;
len = OF_getproplen(node, "status");
if (len <= 0)
return (1);
OF_getprop(node, "status", status, OFW_STATUS_LEN);
if ((len == 5 && (bcmp(status, "okay", len) == 0)) ||
(len == 3 && (bcmp(status, "ok", len))))
return (1);
return (0);
}
static int
ofw_bus_node_is_compatible_int(const char *compat, int len,
const char *onecompat)
{
int onelen, l, ret;
onelen = strlen(onecompat);
ret = 0;
while (len > 0) {
if (strlen(compat) == onelen &&
strncasecmp(compat, onecompat, onelen) == 0) {
/* Found it. */
ret = 1;
break;
}
/* Slide to the next sub-string. */
l = strlen(compat) + 1;
compat += l;
len -= l;
}
return (ret);
}
int
ofw_bus_node_is_compatible(phandle_t node, const char *compatstr)
{
char compat[OFW_COMPAT_LEN];
int len, rv;
if ((len = OF_getproplen(node, "compatible")) <= 0)
return (0);
bzero(compat, OFW_COMPAT_LEN);
if (OF_getprop(node, "compatible", compat, OFW_COMPAT_LEN) < 0)
return (0);
rv = ofw_bus_node_is_compatible_int(compat, len, compatstr);
return (rv);
}
int
ofw_bus_is_compatible(device_t dev, const char *onecompat)
{
phandle_t node;
const char *compat;
int len;
if ((compat = ofw_bus_get_compat(dev)) == NULL)
return (0);
if ((node = ofw_bus_get_node(dev)) == -1)
return (0);
/* Get total 'compatible' prop len */
if ((len = OF_getproplen(node, "compatible")) <= 0)
return (0);
return (ofw_bus_node_is_compatible_int(compat, len, onecompat));
}
int
ofw_bus_is_compatible_strict(device_t dev, const char *compatible)
{
const char *compat;
size_t len;
if ((compat = ofw_bus_get_compat(dev)) == NULL)
return (0);
len = strlen(compatible);
if (strlen(compat) == len &&
strncasecmp(compat, compatible, len) == 0)
return (1);
return (0);
}
const struct ofw_compat_data *
ofw_bus_search_compatible(device_t dev, const struct ofw_compat_data *compat)
{
if (compat == NULL)
return NULL;
for (; compat->ocd_str != NULL; ++compat) {
if (ofw_bus_is_compatible(dev, compat->ocd_str))
break;
}
return (compat);
}
int
ofw_bus_has_prop(device_t dev, const char *propname)
{
phandle_t node;
if ((node = ofw_bus_get_node(dev)) == -1)
return (0);
return (OF_hasprop(node, propname));
}
void
ofw_bus_setup_iinfo(phandle_t node, struct ofw_bus_iinfo *ii, int intrsz)
{
pcell_t addrc;
int msksz;
if (OF_getencprop(node, "#address-cells", &addrc, sizeof(addrc)) == -1)
addrc = 2;
ii->opi_addrc = addrc * sizeof(pcell_t);
ii->opi_imapsz = OF_getencprop_alloc(node, "interrupt-map", 1,
(void **)&ii->opi_imap);
if (ii->opi_imapsz > 0) {
msksz = OF_getencprop_alloc(node, "interrupt-map-mask", 1,
(void **)&ii->opi_imapmsk);
/*
* Failure to get the mask is ignored; a full mask is used
* then. We barf on bad mask sizes, however.
*/
if (msksz != -1 && msksz != ii->opi_addrc + intrsz)
panic("ofw_bus_setup_iinfo: bad interrupt-map-mask "
"property!");
}
}
int
ofw_bus_lookup_imap(phandle_t node, struct ofw_bus_iinfo *ii, void *reg,
int regsz, void *pintr, int pintrsz, void *mintr, int mintrsz,
phandle_t *iparent)
{
uint8_t maskbuf[regsz + pintrsz];
int rv;
if (ii->opi_imapsz <= 0)
return (0);
KASSERT(regsz >= ii->opi_addrc,
("ofw_bus_lookup_imap: register size too small: %d < %d",
regsz, ii->opi_addrc));
if (node != -1) {
rv = OF_getencprop(node, "reg", reg, regsz);
if (rv < regsz)
panic("ofw_bus_lookup_imap: cannot get reg property");
}
return (ofw_bus_search_intrmap(pintr, pintrsz, reg, ii->opi_addrc,
ii->opi_imap, ii->opi_imapsz, ii->opi_imapmsk, maskbuf, mintr,
mintrsz, iparent));
}
/*
* Map an interrupt using the firmware reg, interrupt-map and
* interrupt-map-mask properties.
* The interrupt property to be mapped must be of size intrsz, and pointed to
* by intr. The regs property of the node for which the mapping is done must
* be passed as regs. This property is an array of register specifications;
* the size of the address part of such a specification must be passed as
* physsz. Only the first element of the property is used.
* imap and imapsz hold the interrupt mask and it's size.
* imapmsk is a pointer to the interrupt-map-mask property, which must have
* a size of physsz + intrsz; it may be NULL, in which case a full mask is
* assumed.
* maskbuf must point to a buffer of length physsz + intrsz.
* The interrupt is returned in result, which must point to a buffer of length
* rintrsz (which gives the expected size of the mapped interrupt).
* Returns number of cells in the interrupt if a mapping was found, 0 otherwise.
*/
int
ofw_bus_search_intrmap(void *intr, int intrsz, void *regs, int physsz,
void *imap, int imapsz, void *imapmsk, void *maskbuf, void *result,
int rintrsz, phandle_t *iparent)
{
phandle_t parent;
uint8_t *ref = maskbuf;
uint8_t *uiintr = intr;
uint8_t *uiregs = regs;
uint8_t *uiimapmsk = imapmsk;
uint8_t *mptr;
pcell_t paddrsz;
pcell_t pintrsz;
int i, tsz;
if (imapmsk != NULL) {
for (i = 0; i < physsz; i++)
ref[i] = uiregs[i] & uiimapmsk[i];
for (i = 0; i < intrsz; i++)
ref[physsz + i] = uiintr[i] & uiimapmsk[physsz + i];
} else {
bcopy(regs, ref, physsz);
bcopy(intr, ref + physsz, intrsz);
}
mptr = imap;
i = imapsz;
paddrsz = 0;
while (i > 0) {
bcopy(mptr + physsz + intrsz, &parent, sizeof(parent));
#ifndef OFW_IMAP_NO_IPARENT_ADDR_CELLS
/*
* Find if we need to read the parent address data.
* CHRP-derived OF bindings, including ePAPR-compliant FDTs,
* use this as an optional part of the specifier.
*/
if (OF_getencprop(OF_node_from_xref(parent),
"#address-cells", &paddrsz, sizeof(paddrsz)) == -1)
paddrsz = 0; /* default */
paddrsz *= sizeof(pcell_t);
#endif
if (OF_searchencprop(OF_node_from_xref(parent),
"#interrupt-cells", &pintrsz, sizeof(pintrsz)) == -1)
pintrsz = 1; /* default */
pintrsz *= sizeof(pcell_t);
/* Compute the map stride size. */
tsz = physsz + intrsz + sizeof(phandle_t) + paddrsz + pintrsz;
KASSERT(i >= tsz, ("ofw_bus_search_intrmap: truncated map"));
if (bcmp(ref, mptr, physsz + intrsz) == 0) {
bcopy(mptr + physsz + intrsz + sizeof(parent) + paddrsz,
result, MIN(rintrsz, pintrsz));
if (iparent != NULL)
*iparent = parent;
return (pintrsz/sizeof(pcell_t));
}
mptr += tsz;
i -= tsz;
}
return (0);
}
int
ofw_bus_msimap(phandle_t node, uint16_t pci_rid, phandle_t *msi_parent,
uint32_t *msi_rid)
{
pcell_t *map, mask, msi_base, rid_base, rid_length;
ssize_t len;
uint32_t masked_rid;
int err, i;
/* TODO: This should be OF_searchprop_alloc if we had it */
len = OF_getencprop_alloc(node, "msi-map", sizeof(*map), (void **)&map);
if (len < 0) {
if (msi_parent != NULL) {
*msi_parent = 0;
OF_getencprop(node, "msi-parent", msi_parent,
sizeof(*msi_parent));
}
if (msi_rid != NULL)
*msi_rid = pci_rid;
return (0);
}
err = ENOENT;
mask = 0xffffffff;
OF_getencprop(node, "msi-map-mask", &mask, sizeof(mask));
masked_rid = pci_rid & mask;
for (i = 0; i < len; i += 4) {
rid_base = map[i + 0];
rid_length = map[i + 3];
if (masked_rid < rid_base ||
masked_rid >= (rid_base + rid_length))
continue;
msi_base = map[i + 2];
if (msi_parent != NULL)
*msi_parent = map[i + 1];
if (msi_rid != NULL)
*msi_rid = masked_rid - rid_base + msi_base;
err = 0;
break;
}
free(map, M_OFWPROP);
return (err);
}
int
ofw_bus_reg_to_rl(device_t dev, phandle_t node, pcell_t acells, pcell_t scells,
struct resource_list *rl)
{
uint64_t phys, size;
ssize_t i, j, rid, nreg, ret;
uint32_t *reg;
char *name;
/*
* This may be just redundant when having ofw_bus_devinfo
* but makes this routine independent of it.
*/
ret = OF_getprop_alloc(node, "name", sizeof(*name), (void **)&name);
if (ret == -1)
name = NULL;
ret = OF_getencprop_alloc(node, "reg", sizeof(*reg), (void **)&reg);
nreg = (ret == -1) ? 0 : ret;
if (nreg % (acells + scells) != 0) {
if (bootverbose)
device_printf(dev, "Malformed reg property on <%s>\n",
(name == NULL) ? "unknown" : name);
nreg = 0;
}
for (i = 0, rid = 0; i < nreg; i += acells + scells, rid++) {
phys = size = 0;
for (j = 0; j < acells; j++) {
phys <<= 32;
phys |= reg[i + j];
}
for (j = 0; j < scells; j++) {
size <<= 32;
size |= reg[i + acells + j];
}
/* Skip the dummy reg property of glue devices like ssm(4). */
if (size != 0)
resource_list_add(rl, SYS_RES_MEMORY, rid,
phys, phys + size - 1, size);
}
free(name, M_OFWPROP);
free(reg, M_OFWPROP);
return (0);
}
/*
* Get interrupt parent for given node.
* Returns 0 if interrupt parent doesn't exist.
*/
phandle_t
ofw_bus_find_iparent(phandle_t node)
{
phandle_t iparent;
if (OF_searchencprop(node, "interrupt-parent", &iparent,
sizeof(iparent)) == -1) {
for (iparent = node; iparent != 0;
iparent = OF_parent(iparent)) {
if (OF_hasprop(iparent, "interrupt-controller"))
break;
}
iparent = OF_xref_from_node(iparent);
}
return (iparent);
}
int
ofw_bus_intr_to_rl(device_t dev, phandle_t node,
struct resource_list *rl, int *rlen)
{
phandle_t iparent;
uint32_t icells, *intr;
int err, i, irqnum, nintr, rid;
boolean_t extended;
nintr = OF_getencprop_alloc(node, "interrupts", sizeof(*intr),
(void **)&intr);
if (nintr > 0) {
iparent = ofw_bus_find_iparent(node);
if (iparent == 0) {
device_printf(dev, "No interrupt-parent found, "
"assuming direct parent\n");
iparent = OF_parent(node);
iparent = OF_xref_from_node(iparent);
}
if (OF_searchencprop(OF_node_from_xref(iparent),
"#interrupt-cells", &icells, sizeof(icells)) == -1) {
device_printf(dev, "Missing #interrupt-cells "
"property, assuming <1>\n");
icells = 1;
}
if (icells < 1 || icells > nintr) {
device_printf(dev, "Invalid #interrupt-cells property "
"value <%d>, assuming <1>\n", icells);
icells = 1;
}
extended = false;
} else {
nintr = OF_getencprop_alloc(node, "interrupts-extended",
sizeof(*intr), (void **)&intr);
if (nintr <= 0)
return (0);
extended = true;
}
err = 0;
rid = 0;
for (i = 0; i < nintr; i += icells) {
if (extended) {
iparent = intr[i++];
if (OF_searchencprop(OF_node_from_xref(iparent),
"#interrupt-cells", &icells, sizeof(icells)) == -1) {
device_printf(dev, "Missing #interrupt-cells "
"property\n");
err = ENOENT;
break;
}
if (icells < 1 || (i + icells) > nintr) {
device_printf(dev, "Invalid #interrupt-cells "
"property value <%d>\n", icells);
err = ERANGE;
break;
}
}
irqnum = ofw_bus_map_intr(dev, iparent, icells, &intr[i]);
resource_list_add(rl, SYS_RES_IRQ, rid++, irqnum, irqnum, 1);
}
if (rlen != NULL)
*rlen = rid;
free(intr, M_OFWPROP);
return (err);
}
int
ofw_bus_intr_by_rid(device_t dev, phandle_t node, int wanted_rid,
phandle_t *producer, int *ncells, pcell_t **cells)
{
phandle_t iparent;
uint32_t icells, *intr;
int err, i, nintr, rid;
boolean_t extended;
nintr = OF_getencprop_alloc(node, "interrupts", sizeof(*intr),
(void **)&intr);
if (nintr > 0) {
iparent = ofw_bus_find_iparent(node);
if (iparent == 0) {
device_printf(dev, "No interrupt-parent found, "
"assuming direct parent\n");
iparent = OF_parent(node);
iparent = OF_xref_from_node(iparent);
}
if (OF_searchencprop(OF_node_from_xref(iparent),
"#interrupt-cells", &icells, sizeof(icells)) == -1) {
device_printf(dev, "Missing #interrupt-cells "
"property, assuming <1>\n");
icells = 1;
}
if (icells < 1 || icells > nintr) {
device_printf(dev, "Invalid #interrupt-cells property "
"value <%d>, assuming <1>\n", icells);
icells = 1;
}
extended = false;
} else {
nintr = OF_getencprop_alloc(node, "interrupts-extended",
sizeof(*intr), (void **)&intr);
if (nintr <= 0)
return (ESRCH);
extended = true;
}
err = ESRCH;
rid = 0;
for (i = 0; i < nintr; i += icells, rid++) {
if (extended) {
iparent = intr[i++];
if (OF_searchencprop(OF_node_from_xref(iparent),
"#interrupt-cells", &icells, sizeof(icells)) == -1) {
device_printf(dev, "Missing #interrupt-cells "
"property\n");
err = ENOENT;
break;
}
if (icells < 1 || (i + icells) > nintr) {
device_printf(dev, "Invalid #interrupt-cells "
"property value <%d>\n", icells);
err = ERANGE;
break;
}
}
if (rid == wanted_rid) {
*cells = malloc(icells * sizeof(**cells), M_OFWPROP,
M_WAITOK);
*producer = iparent;
*ncells= icells;
memcpy(*cells, intr + i, icells * sizeof(**cells));
err = 0;
break;
}
}
free(intr, M_OFWPROP);
return (err);
}
phandle_t
ofw_bus_find_child(phandle_t start, const char *child_name)
{
char *name;
int ret;
phandle_t child;
for (child = OF_child(start); child != 0; child = OF_peer(child)) {
ret = OF_getprop_alloc(child, "name", sizeof(*name), (void **)&name);
if (ret == -1)
continue;
if (strcmp(name, child_name) == 0) {
free(name, M_OFWPROP);
return (child);
}
free(name, M_OFWPROP);
}
return (0);
}
phandle_t
ofw_bus_find_compatible(phandle_t node, const char *onecompat)
{
phandle_t child, ret;
/*
* Traverse all children of 'start' node, and find first with
* matching 'compatible' property.
*/
for (child = OF_child(node); child != 0; child = OF_peer(child)) {
if (ofw_bus_node_is_compatible(child, onecompat) != 0)
return (child);
ret = ofw_bus_find_compatible(child, onecompat);
if (ret != 0)
return (ret);
}
return (0);
}
/**
* @brief Return child of bus whose phandle is node
*
* A direct child of @p will be returned if it its phandle in the
* OFW tree is @p node. Otherwise, NULL is returned.
*
* @param bus The bus to examine
* @param node The phandle_t to look for.
*/
device_t
ofw_bus_find_child_device_by_phandle(device_t bus, phandle_t node)
{
device_t *children, retval, child;
int nkid, i;
/*
* Nothing can match the flag value for no node.
*/
if (node == -1)
return (NULL);
/*
* Search the children for a match. We microoptimize
* a bit by not using ofw_bus_get since we already know
* the parent. We do not recurse.
*/
if (device_get_children(bus, &children, &nkid) != 0)
return (NULL);
retval = NULL;
for (i = 0; i < nkid; i++) {
child = children[i];
if (OFW_BUS_GET_NODE(bus, child) == node) {
retval = child;
break;
}
}
free(children, M_TEMP);
return (retval);
}
/*
* Parse property that contain list of xrefs and values
* (like standard "clocks" and "resets" properties)
* Input arguments:
* node - consumers device node
* list_name - name of parsed list - "clocks"
* cells_name - name of size property - "#clock-cells"
* idx - the index of the requested list entry, or, if -1, an indication
* to return the number of entries in the parsed list.
* Output arguments:
* producer - handle of producer
* ncells - number of cells in result or the number of items in the list when
* idx == -1.
* cells - array of decoded cells
*/
static int
ofw_bus_parse_xref_list_internal(phandle_t node, const char *list_name,
const char *cells_name, int idx, phandle_t *producer, int *ncells,
pcell_t **cells)
{
phandle_t pnode;
phandle_t *elems;
uint32_t pcells;
int rv, i, j, nelems, cnt;
elems = NULL;
nelems = OF_getencprop_alloc(node, list_name, sizeof(*elems),
(void **)&elems);
if (nelems <= 0)
return (ENOENT);
rv = (idx == -1) ? 0 : ENOENT;
for (i = 0, cnt = 0; i < nelems; i += pcells, cnt++) {
pnode = elems[i++];
if (OF_getencprop(OF_node_from_xref(pnode),
cells_name, &pcells, sizeof(pcells)) == -1) {
printf("Missing %s property\n", cells_name);
rv = ENOENT;
break;
}
if ((i + pcells) > nelems) {
printf("Invalid %s property value <%d>\n", cells_name,
pcells);
rv = ERANGE;
break;
}
if (cnt == idx) {
*cells= malloc(pcells * sizeof(**cells), M_OFWPROP,
M_WAITOK);
*producer = pnode;
*ncells = pcells;
for (j = 0; j < pcells; j++)
(*cells)[j] = elems[i + j];
rv = 0;
break;
}
}
if (elems != NULL)
free(elems, M_OFWPROP);
if (idx == -1 && rv == 0)
*ncells = cnt;
return (rv);
}
/*
* Parse property that contain list of xrefs and values
* (like standard "clocks" and "resets" properties)
* Input arguments:
* node - consumers device node
* list_name - name of parsed list - "clocks"
* cells_name - name of size property - "#clock-cells"
* idx - the index of the requested list entry (>= 0)
* Output arguments:
* producer - handle of producer
* ncells - number of cells in result
* cells - array of decoded cells
*/
int
ofw_bus_parse_xref_list_alloc(phandle_t node, const char *list_name,
const char *cells_name, int idx, phandle_t *producer, int *ncells,
pcell_t **cells)
{
KASSERT(idx >= 0,
("ofw_bus_parse_xref_list_alloc: negative index supplied"));
return (ofw_bus_parse_xref_list_internal(node, list_name, cells_name,
idx, producer, ncells, cells));
}
/*
* Parse property that contain list of xrefs and values
* (like standard "clocks" and "resets" properties)
* and determine the number of items in the list
* Input arguments:
* node - consumers device node
* list_name - name of parsed list - "clocks"
* cells_name - name of size property - "#clock-cells"
* Output arguments:
* count - number of items in list
*/
int
ofw_bus_parse_xref_list_get_length(phandle_t node, const char *list_name,
const char *cells_name, int *count)
{
return (ofw_bus_parse_xref_list_internal(node, list_name, cells_name,
-1, NULL, count, NULL));
}
/*
* Find index of string in string list property (case sensitive).
*/
int
ofw_bus_find_string_index(phandle_t node, const char *list_name,
const char *name, int *idx)
{
char *elems;
int rv, i, cnt, nelems;
elems = NULL;
nelems = OF_getprop_alloc(node, list_name, 1, (void **)&elems);
if (nelems <= 0)
return (ENOENT);
rv = ENOENT;
for (i = 0, cnt = 0; i < nelems; cnt++) {
if (strcmp(elems + i, name) == 0) {
*idx = cnt;
rv = 0;
break;
}
i += strlen(elems + i) + 1;
}
if (elems != NULL)
free(elems, M_OFWPROP);
return (rv);
}
/*
* Create zero terminated array of strings from string list property.
*/
int
ofw_bus_string_list_to_array(phandle_t node, const char *list_name,
const char ***out_array)
{
char *elems, *tptr;
const char **array;
int i, cnt, nelems, len;
elems = NULL;
nelems = OF_getprop_alloc(node, list_name, 1, (void **)&elems);
if (nelems <= 0)
return (nelems);
/* Count number of strings. */
for (i = 0, cnt = 0; i < nelems; cnt++)
i += strlen(elems + i) + 1;
/* Allocate space for arrays and all strings. */
array = malloc((cnt + 1) * sizeof(char *) + nelems, M_OFWPROP,
M_WAITOK);
/* Get address of first string. */
tptr = (char *)(array + cnt + 1);
/* Copy strings. */
memcpy(tptr, elems, nelems);
free(elems, M_OFWPROP);
/* Fill string pointers. */
for (i = 0, cnt = 0; i < nelems; cnt++) {
len = strlen(tptr) + 1;
array[cnt] = tptr;
i += len;
tptr += len;
}
array[cnt] = NULL;
*out_array = array;
return (cnt);
}
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