Expand PMF_FN_* macros.
[netbsd-mini2440.git] / sys / dev / pci / pci_usrreq.c
blob65eedf4186079b0416bd09ef98ac08b659818c31
1 /* $NetBSD: pci_usrreq.c,v 1.21 2009/07/14 19:54:40 macallan Exp $ */
3 /*
4 * Copyright 2001 Wasabi Systems, Inc.
5 * All rights reserved.
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
39 * User -> kernel interface for PCI bus access.
42 #include <sys/cdefs.h>
43 __KERNEL_RCSID(0, "$NetBSD: pci_usrreq.c,v 1.21 2009/07/14 19:54:40 macallan Exp $");
45 #include <sys/param.h>
46 #include <sys/conf.h>
47 #include <sys/device.h>
48 #include <sys/ioctl.h>
49 #include <sys/proc.h>
50 #include <sys/systm.h>
51 #include <sys/errno.h>
52 #include <sys/fcntl.h>
53 #include <sys/kauth.h>
55 #include <dev/pci/pcireg.h>
56 #include <dev/pci/pcivar.h>
57 #include <dev/pci/pciio.h>
59 #include "opt_pci.h"
61 static int
62 pciopen(dev_t dev, int flags, int mode, struct lwp *l)
64 device_t dv;
66 dv = device_lookup(&pci_cd, minor(dev));
67 if (dv == NULL)
68 return ENXIO;
70 return 0;
73 static int
74 pciioctl(dev_t dev, u_long cmd, void *data, int flag, struct lwp *l)
76 struct pci_softc *sc = device_lookup_private(&pci_cd, minor(dev));
77 struct pciio_bdf_cfgreg *bdfr;
78 struct pciio_businfo *binfo;
79 pcitag_t tag;
81 switch (cmd) {
82 case PCI_IOC_BDF_CFGREAD:
83 case PCI_IOC_BDF_CFGWRITE:
84 bdfr = data;
85 if (bdfr->bus > 255 || bdfr->device >= sc->sc_maxndevs ||
86 bdfr->function > 7)
87 return EINVAL;
88 tag = pci_make_tag(sc->sc_pc, bdfr->bus, bdfr->device,
89 bdfr->function);
91 if (cmd == PCI_IOC_BDF_CFGREAD) {
92 bdfr->cfgreg.val = pci_conf_read(sc->sc_pc, tag,
93 bdfr->cfgreg.reg);
94 } else {
95 if ((flag & FWRITE) == 0)
96 return EBADF;
97 pci_conf_write(sc->sc_pc, tag, bdfr->cfgreg.reg,
98 bdfr->cfgreg.val);
100 return 0;
102 case PCI_IOC_BUSINFO:
103 binfo = data;
104 binfo->busno = sc->sc_bus;
105 binfo->maxdevs = sc->sc_maxndevs;
106 return 0;
108 default:
109 return ENOTTY;
113 static paddr_t
114 pcimmap(dev_t dev, off_t offset, int prot)
116 struct pci_softc *sc = device_lookup_private(&pci_cd, minor(dev));
118 if (kauth_authorize_generic(kauth_cred_get(), KAUTH_GENERIC_ISSUSER,
119 NULL) != 0) {
120 return -1;
123 * Since we allow mapping of the entire bus, we
124 * take the offset to be the address on the bus,
125 * and pass 0 as the offset into that range.
127 * XXX Need a way to deal with linear/prefetchable/etc.
129 * XXX we rely on MD mmap() methods to enforce limits since these
130 * are hidden in *_tag_t structs if they exist at all
133 #ifdef PCI_MAGIC_IO_RANGE
135 * first, check if someone's trying to map the IO range
136 * XXX this assumes 64kB IO space even though some machines can have
137 * significantly more than that - macppc's bandit host bridge allows
138 * 8MB IO space and sparc64 may have the entire 4GB available. The
139 * firmware on both tries to use the lower 64kB first though and
140 * exausting it is pretty difficult so we should be safe
142 if ((offset >= PCI_MAGIC_IO_RANGE) &&
143 (offset < (PCI_MAGIC_IO_RANGE + 0x10000))) {
144 return bus_space_mmap(sc->sc_iot, offset - PCI_MAGIC_IO_RANGE,
145 0, prot, 0);
147 #endif /* PCI_MAGIC_IO_RANGE */
148 return bus_space_mmap(sc->sc_memt, offset, 0, prot, 0);
151 const struct cdevsw pci_cdevsw = {
152 pciopen, nullclose, noread, nowrite, pciioctl,
153 nostop, notty, nopoll, pcimmap, nokqfilter, D_OTHER,
157 * pci_devioctl:
159 * PCI ioctls that can be performed on devices directly.
162 pci_devioctl(pci_chipset_tag_t pc, pcitag_t tag, u_long cmd, void *data,
163 int flag, struct lwp *l)
165 struct pciio_cfgreg *r = (void *) data;
167 switch (cmd) {
168 case PCI_IOC_CFGREAD:
169 r->val = pci_conf_read(pc, tag, r->reg);
170 break;
172 case PCI_IOC_CFGWRITE:
173 if ((flag & FWRITE) == 0)
174 return EBADF;
175 pci_conf_write(pc, tag, r->reg, r->val);
176 break;
178 default:
179 return EPASSTHROUGH;
182 return 0;