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freebsd-dev/sys/dev/ofw/ofw_bus_subr.h
Warner Losh ddfc9c4c59 newbus: Move from bus_child_{pnpinfo,location}_src to bus_child_{pnpinfo,location} with sbuf 
Now that the upper layers all go through a layer to tie into these
information functions that translates an sbuf into char * and len. The
current interface suffers issues of what to do in cases of truncation,
etc. Instead, migrate all these functions to using struct sbuf and these
issues go away. The caller is also in charge of any memory allocation
and/or expansion that's needed during this process.

Create a bus_generic_child_{pnpinfo,location} and make it default. It
just returns success. This is for those busses that have no information
for these items. Migrate the now-empty routines to using this as
appropriate.

Document these new interfaces with man pages, and oversight from before.

Reviewed by:		jhb, bcr
Sponsored by:		Netflix
Differential Revision:	https://reviews.freebsd.org/D29937
2021-06-22 20:52:06 -06:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* 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.
*
* $FreeBSD$
*/
#ifndef _DEV_OFW_OFW_BUS_SUBR_H_
#define _DEV_OFW_OFW_BUS_SUBR_H_
#include <sys/bus.h>
#ifdef INTRNG
#include <sys/intr.h>
#endif
#include <dev/ofw/openfirm.h>
#include "ofw_bus_if.h"
#define ORIP_NOINT -1
#define ORIR_NOTFOUND 0xffffffff
struct ofw_bus_iinfo {
uint8_t *opi_imap;
uint8_t *opi_imapmsk;
int opi_imapsz;
pcell_t opi_addrc;
};
struct ofw_compat_data {
const char *ocd_str;
uintptr_t ocd_data;
};
#ifdef INTRNG
struct intr_map_data_fdt {
struct intr_map_data hdr;
phandle_t iparent;
u_int ncells;
pcell_t cells[];
};
#endif
#define FDTCOMPAT_PNP_DESCR "Z:compat;P:#;"
#define FDTCOMPAT_PNP_INFO(t, busname) \
MODULE_PNP_INFO(FDTCOMPAT_PNP_DESCR, busname, t, t, sizeof(t) / sizeof(t[0]));
#define OFWBUS_PNP_INFO(t) FDTCOMPAT_PNP_INFO(t, ofwbus)
#define SIMPLEBUS_PNP_INFO(t) FDTCOMPAT_PNP_INFO(t, simplebus)
/* Generic implementation of ofw_bus_if.m methods and helper routines */
int ofw_bus_gen_setup_devinfo(struct ofw_bus_devinfo *, phandle_t);
void ofw_bus_gen_destroy_devinfo(struct ofw_bus_devinfo *);
ofw_bus_get_compat_t ofw_bus_gen_get_compat;
ofw_bus_get_model_t ofw_bus_gen_get_model;
ofw_bus_get_name_t ofw_bus_gen_get_name;
ofw_bus_get_node_t ofw_bus_gen_get_node;
ofw_bus_get_type_t ofw_bus_gen_get_type;
/* Helper method to report interesting OF properties in pnpinfo */
bus_child_pnpinfo_t ofw_bus_gen_child_pnpinfo;
/* Routines for processing firmware interrupt maps */
void ofw_bus_setup_iinfo(phandle_t, struct ofw_bus_iinfo *, int);
int ofw_bus_lookup_imap(phandle_t, struct ofw_bus_iinfo *, void *, int,
void *, int, void *, int, phandle_t *);
int ofw_bus_search_intrmap(void *, int, void *, int, void *, int, void *,
void *, void *, int, phandle_t *);
/* Routines for processing msi maps */
int ofw_bus_msimap(phandle_t, uint16_t, phandle_t *, uint32_t *);
/* Routines for parsing device-tree data into resource lists. */
int ofw_bus_reg_to_rl(device_t, phandle_t, pcell_t, pcell_t,
struct resource_list *);
int ofw_bus_assigned_addresses_to_rl(device_t, phandle_t, pcell_t, pcell_t,
struct resource_list *);
int ofw_bus_intr_to_rl(device_t, phandle_t, struct resource_list *, int *);
int ofw_bus_intr_by_rid(device_t, phandle_t, int, phandle_t *, int *,
pcell_t **);
/* Helper to get device status property */
const char *ofw_bus_get_status(device_t dev);
int ofw_bus_status_okay(device_t dev);
int ofw_bus_node_status_okay(phandle_t node);
/* Helper to get node's interrupt parent */
phandle_t ofw_bus_find_iparent(phandle_t);
/* Helper routine for checking compat prop */
int ofw_bus_is_compatible(device_t, const char *);
int ofw_bus_is_compatible_strict(device_t, const char *);
int ofw_bus_node_is_compatible(phandle_t, const char *);
/*
* Helper routine to search a list of compat properties. The table is
* terminated by an entry with a NULL compat-string pointer; a pointer to that
* table entry is returned if none of the compat strings match for the device,
* giving you control over the not-found value. Will not return NULL unless the
* provided table pointer is NULL.
*/
const struct ofw_compat_data *
ofw_bus_search_compatible(device_t, const struct ofw_compat_data *);
/* Helper routine for checking existence of a prop */
int ofw_bus_has_prop(device_t, const char *);
/* Helper to search for a child with a given compat prop */
phandle_t ofw_bus_find_compatible(phandle_t, const char *);
/* Helper to search for a child with a given name */
phandle_t ofw_bus_find_child(phandle_t, const char *);
/* Helper routine to find a device_t child matching a given phandle_t */
device_t ofw_bus_find_child_device_by_phandle(device_t bus, phandle_t node);
/* Helper routines for parsing lists */
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);
int ofw_bus_parse_xref_list_get_length(phandle_t node, const char *list_name,
const char *cells_name, int *count);
int ofw_bus_find_string_index(phandle_t node, const char *list_name,
const char *name, int *idx);
int ofw_bus_string_list_to_array(phandle_t node, const char *list_name,
const char ***array);
#endif /* !_DEV_OFW_OFW_BUS_SUBR_H_ */
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