/* $NetBSD: openfirmio.c,v 1.13 2014/07/25 08:10:37 dholland Exp $ */ /* * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This software was developed by the Computer Systems Engineering group * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and * contributed to Berkeley. * * All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Lawrence Berkeley Laboratory. * * 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. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * @(#)openfirm.c 8.1 (Berkeley) 6/11/93 */ #include __KERNEL_RCSID(0, "$NetBSD: openfirmio.c,v 1.13 2014/07/25 08:10:37 dholland Exp $"); #include #include #include #include #include #include #include #include #include #include #include static int lastnode; /* speed hack */ static int openfirmcheckid (int, int); static int openfirmgetstr (int, char *, char **); void openfirmattach (int); dev_type_ioctl(openfirmioctl); const struct cdevsw openfirm_cdevsw = { .d_open = nullopen, .d_close = nullclose, .d_read = noread, .d_write = nowrite, .d_ioctl = openfirmioctl, .d_stop = nostop, .d_tty = notty, .d_poll = nopoll, .d_mmap = nommap, .d_kqfilter = nokqfilter, .d_discard = nodiscard, .d_flag = 0 }; void openfirmattach(int num) { /* nothing */ } /* * Verify target ID is valid (exists in the OPENPROM tree), as * listed from node ID sid forward. */ static int openfirmcheckid(int sid, int tid) { for (; sid != 0; sid = OF_peer(sid)) if (sid == tid || openfirmcheckid(OF_child(sid), tid)) return (1); return (0); } static int openfirmgetstr(int len, char *user, char **cpp) { int error; char *cp; /* Reject obvious bogus requests */ if ((u_int)len > (8 * 1024) - 1) return (ENAMETOOLONG); *cpp = cp = malloc(len + 1, M_TEMP, M_WAITOK); error = copyin(user, cp, len); cp[len] = '\0'; return (error); } int openfirmioctl(dev_t dev, u_long cmd, void *data, int flags, struct lwp *l) { struct ofiocdesc *of; int node, len, ok, error, s; char *name, *value; if (cmd == OFIOCGETOPTNODE) { s = splhigh(); *(int *) data = OF_finddevice("/options"); splx(s); return (0); } /* Verify node id */ of = (struct ofiocdesc *)data; node = of->of_nodeid; if (node != 0 && node != lastnode) { /* Not an easy one, must search for it */ s = splhigh(); ok = openfirmcheckid(OF_peer(0), node); splx(s); if (!ok) return (EINVAL); lastnode = node; } name = value = NULL; error = 0; switch (cmd) { case OFIOCGET: if ((flags & FREAD) == 0) return (EBADF); if (node == 0) return (EINVAL); error = openfirmgetstr(of->of_namelen, of->of_name, &name); if (error) break; s = splhigh(); len = OF_getproplen(node, name); splx(s); if (len > of->of_buflen) { error = ENOMEM; break; } of->of_buflen = len; /* -1 means no entry; 0 means no value */ if (len <= 0) break; value = malloc(len, M_TEMP, M_WAITOK); if (value == NULL) { error = ENOMEM; break; } s = splhigh(); len = OF_getprop(node, name, (void *)value, len); splx(s); error = copyout(value, of->of_buf, len); break; case OFIOCSET: if ((flags & FWRITE) == 0) return (EBADF); if (node == 0) return (EINVAL); error = openfirmgetstr(of->of_namelen, of->of_name, &name); if (error) break; error = openfirmgetstr(of->of_buflen, of->of_buf, &value); if (error) break; s = splhigh(); len = OF_setprop(node, name, value, of->of_buflen + 1); splx(s); /* * XXX * some OF implementations return the buffer length including * the trailing zero ( like macppc ) and some without ( like * FirmWorks OF used in Shark ) */ if ((len != (of->of_buflen + 1)) && (len != of->of_buflen)) error = EINVAL; break; case OFIOCNEXTPROP: { char newname[32]; if ((flags & FREAD) == 0) return (EBADF); if (node == 0) return (EINVAL); if (of->of_namelen != 0) { error = openfirmgetstr(of->of_namelen, of->of_name, &name); if (error) break; } s = splhigh(); ok = OF_nextprop(node, name, newname); splx(s); if (ok == 0) { error = ENOENT; break; } if (ok == -1) { error = EINVAL; break; } len = strlen(newname); if (len > of->of_buflen) len = of->of_buflen; else of->of_buflen = len; error = copyout(newname, of->of_buf, len); break; } case OFIOCGETNEXT: if ((flags & FREAD) == 0) return (EBADF); s = splhigh(); node = OF_peer(node); splx(s); *(int *)data = lastnode = node; break; case OFIOCGETCHILD: if ((flags & FREAD) == 0) return (EBADF); if (node == 0) return (EINVAL); s = splhigh(); node = OF_child(node); splx(s); *(int *)data = lastnode = node; break; case OFIOCFINDDEVICE: if ((flags & FREAD) == 0) return (EBADF); error = openfirmgetstr(of->of_namelen, of->of_name, &name); if (error) break; node = OF_finddevice(name); if (node == 0 || node == -1) { error = ENOENT; break; } of->of_nodeid = lastnode = node; break; default: return (ENOTTY); } if (name) free(name, M_TEMP); if (value) free(value, M_TEMP); return (error); }