pci.c revision 1.93 1 1.93 thorpej /* $NetBSD: pci.c,v 1.93 2005/06/28 00:28:42 thorpej Exp $ */
2 1.3 cgd
3 1.1 mycroft /*
4 1.37 cgd * Copyright (c) 1995, 1996, 1997, 1998
5 1.27 cgd * Christopher G. Demetriou. All rights reserved.
6 1.39 mycroft * Copyright (c) 1994 Charles M. Hannum. All rights reserved.
7 1.1 mycroft *
8 1.1 mycroft * Redistribution and use in source and binary forms, with or without
9 1.1 mycroft * modification, are permitted provided that the following conditions
10 1.1 mycroft * are met:
11 1.1 mycroft * 1. Redistributions of source code must retain the above copyright
12 1.1 mycroft * notice, this list of conditions and the following disclaimer.
13 1.1 mycroft * 2. Redistributions in binary form must reproduce the above copyright
14 1.1 mycroft * notice, this list of conditions and the following disclaimer in the
15 1.1 mycroft * documentation and/or other materials provided with the distribution.
16 1.1 mycroft * 3. All advertising materials mentioning features or use of this software
17 1.1 mycroft * must display the following acknowledgement:
18 1.39 mycroft * This product includes software developed by Charles M. Hannum.
19 1.1 mycroft * 4. The name of the author may not be used to endorse or promote products
20 1.1 mycroft * derived from this software without specific prior written permission.
21 1.1 mycroft *
22 1.1 mycroft * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23 1.1 mycroft * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24 1.1 mycroft * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25 1.1 mycroft * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26 1.1 mycroft * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27 1.1 mycroft * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 1.1 mycroft * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 1.1 mycroft * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 1.1 mycroft * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31 1.1 mycroft * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 1.1 mycroft */
33 1.1 mycroft
34 1.1 mycroft /*
35 1.10 cgd * PCI bus autoconfiguration.
36 1.1 mycroft */
37 1.58 lukem
38 1.58 lukem #include <sys/cdefs.h>
39 1.93 thorpej __KERNEL_RCSID(0, "$NetBSD: pci.c,v 1.93 2005/06/28 00:28:42 thorpej Exp $");
40 1.1 mycroft
41 1.45 cgd #include "opt_pci.h"
42 1.45 cgd
43 1.1 mycroft #include <sys/param.h>
44 1.10 cgd #include <sys/systm.h>
45 1.1 mycroft #include <sys/device.h>
46 1.1 mycroft
47 1.10 cgd #include <dev/pci/pcireg.h>
48 1.7 cgd #include <dev/pci/pcivar.h>
49 1.33 cgd #include <dev/pci/pcidevs.h>
50 1.76 christos
51 1.80 fvdl #include <uvm/uvm_extern.h>
52 1.80 fvdl
53 1.76 christos #include "locators.h"
54 1.10 cgd
55 1.45 cgd #ifdef PCI_CONFIG_DUMP
56 1.45 cgd int pci_config_dump = 1;
57 1.45 cgd #else
58 1.45 cgd int pci_config_dump = 0;
59 1.45 cgd #endif
60 1.45 cgd
61 1.91 perry int pciprint(void *, const char *);
62 1.91 perry int pcisubmatch(struct device *, struct cfdata *,
63 1.91 perry const locdesc_t *, void *);
64 1.10 cgd
65 1.86 drochner #ifdef PCI_MACHDEP_ENUMERATE_BUS
66 1.86 drochner #define pci_enumerate_bus PCI_MACHDEP_ENUMERATE_BUS
67 1.86 drochner #else
68 1.87 drochner int pci_enumerate_bus(struct pci_softc *, const int *,
69 1.86 drochner int (*)(struct pci_attach_args *), struct pci_attach_args *);
70 1.86 drochner #endif
71 1.86 drochner
72 1.25 cgd /*
73 1.38 thorpej * Important note about PCI-ISA bridges:
74 1.38 thorpej *
75 1.38 thorpej * Callbacks are used to configure these devices so that ISA/EISA bridges
76 1.38 thorpej * can attach their child busses after PCI configuration is done.
77 1.25 cgd *
78 1.25 cgd * This works because:
79 1.25 cgd * (1) there can be at most one ISA/EISA bridge per PCI bus, and
80 1.25 cgd * (2) any ISA/EISA bridges must be attached to primary PCI
81 1.25 cgd * busses (i.e. bus zero).
82 1.25 cgd *
83 1.25 cgd * That boils down to: there can only be one of these outstanding
84 1.25 cgd * at a time, it is cleared when configuring PCI bus 0 before any
85 1.25 cgd * subdevices have been found, and it is run after all subdevices
86 1.25 cgd * of PCI bus 0 have been found.
87 1.25 cgd *
88 1.25 cgd * This is needed because there are some (legacy) PCI devices which
89 1.25 cgd * can show up as ISA/EISA devices as well (the prime example of which
90 1.25 cgd * are VGA controllers). If you attach ISA from a PCI-ISA/EISA bridge,
91 1.25 cgd * and the bridge is seen before the video board is, the board can show
92 1.25 cgd * up as an ISA device, and that can (bogusly) complicate the PCI device's
93 1.25 cgd * attach code, or make the PCI device not be properly attached at all.
94 1.38 thorpej *
95 1.38 thorpej * We use the generic config_defer() facility to achieve this.
96 1.25 cgd */
97 1.25 cgd
98 1.93 thorpej static int
99 1.93 thorpej pcirescan(struct device *sc, const char *ifattr, const int *locators)
100 1.93 thorpej {
101 1.93 thorpej
102 1.93 thorpej KASSERT(ifattr && !strcmp(ifattr, "pci"));
103 1.93 thorpej KASSERT(locators);
104 1.93 thorpej
105 1.93 thorpej pci_enumerate_bus((struct pci_softc *)sc, locators, NULL, NULL);
106 1.93 thorpej return (0);
107 1.93 thorpej }
108 1.93 thorpej
109 1.93 thorpej static int
110 1.93 thorpej pcimatch(struct device *parent, struct cfdata *cf, void *aux)
111 1.10 cgd {
112 1.10 cgd struct pcibus_attach_args *pba = aux;
113 1.10 cgd
114 1.10 cgd /* Check the locators */
115 1.89 drochner if (cf->cf_loc[PCIBUSCF_BUS] != PCIBUSCF_BUS_DEFAULT &&
116 1.89 drochner cf->cf_loc[PCIBUSCF_BUS] != pba->pba_bus)
117 1.10 cgd return (0);
118 1.10 cgd
119 1.10 cgd /* sanity */
120 1.10 cgd if (pba->pba_bus < 0 || pba->pba_bus > 255)
121 1.10 cgd return (0);
122 1.10 cgd
123 1.10 cgd /*
124 1.10 cgd * XXX check other (hardware?) indicators
125 1.10 cgd */
126 1.10 cgd
127 1.59 thorpej return (1);
128 1.10 cgd }
129 1.1 mycroft
130 1.93 thorpej static void
131 1.93 thorpej pciattach(struct device *parent, struct device *self, void *aux)
132 1.34 drochner {
133 1.34 drochner struct pcibus_attach_args *pba = aux;
134 1.34 drochner struct pci_softc *sc = (struct pci_softc *)self;
135 1.43 thorpej int io_enabled, mem_enabled, mrl_enabled, mrm_enabled, mwi_enabled;
136 1.43 thorpej const char *sep = "";
137 1.87 drochner static const int wildcard[2] = { PCICF_DEV_DEFAULT,
138 1.87 drochner PCICF_FUNCTION_DEFAULT };
139 1.34 drochner
140 1.34 drochner pci_attach_hook(parent, self, pba);
141 1.78 thorpej
142 1.78 thorpej aprint_naive("\n");
143 1.78 thorpej aprint_normal("\n");
144 1.34 drochner
145 1.34 drochner io_enabled = (pba->pba_flags & PCI_FLAGS_IO_ENABLED);
146 1.34 drochner mem_enabled = (pba->pba_flags & PCI_FLAGS_MEM_ENABLED);
147 1.43 thorpej mrl_enabled = (pba->pba_flags & PCI_FLAGS_MRL_OKAY);
148 1.43 thorpej mrm_enabled = (pba->pba_flags & PCI_FLAGS_MRM_OKAY);
149 1.43 thorpej mwi_enabled = (pba->pba_flags & PCI_FLAGS_MWI_OKAY);
150 1.34 drochner
151 1.34 drochner if (io_enabled == 0 && mem_enabled == 0) {
152 1.78 thorpej aprint_error("%s: no spaces enabled!\n", self->dv_xname);
153 1.34 drochner return;
154 1.34 drochner }
155 1.34 drochner
156 1.78 thorpej #define PRINT(str) \
157 1.78 thorpej do { \
158 1.78 thorpej aprint_normal("%s%s", sep, str); \
159 1.78 thorpej sep = ", "; \
160 1.78 thorpej } while (/*CONSTCOND*/0)
161 1.43 thorpej
162 1.78 thorpej aprint_normal("%s: ", self->dv_xname);
163 1.43 thorpej
164 1.34 drochner if (io_enabled)
165 1.43 thorpej PRINT("i/o space");
166 1.43 thorpej if (mem_enabled)
167 1.43 thorpej PRINT("memory space");
168 1.78 thorpej aprint_normal(" enabled");
169 1.43 thorpej
170 1.43 thorpej if (mrl_enabled || mrm_enabled || mwi_enabled) {
171 1.43 thorpej if (mrl_enabled)
172 1.43 thorpej PRINT("rd/line");
173 1.43 thorpej if (mrm_enabled)
174 1.43 thorpej PRINT("rd/mult");
175 1.43 thorpej if (mwi_enabled)
176 1.43 thorpej PRINT("wr/inv");
177 1.78 thorpej aprint_normal(" ok");
178 1.34 drochner }
179 1.43 thorpej
180 1.78 thorpej aprint_normal("\n");
181 1.43 thorpej
182 1.43 thorpej #undef PRINT
183 1.34 drochner
184 1.34 drochner sc->sc_iot = pba->pba_iot;
185 1.34 drochner sc->sc_memt = pba->pba_memt;
186 1.34 drochner sc->sc_dmat = pba->pba_dmat;
187 1.80 fvdl sc->sc_dmat64 = pba->pba_dmat64;
188 1.34 drochner sc->sc_pc = pba->pba_pc;
189 1.34 drochner sc->sc_bus = pba->pba_bus;
190 1.62 thorpej sc->sc_bridgetag = pba->pba_bridgetag;
191 1.34 drochner sc->sc_maxndevs = pci_bus_maxdevs(pba->pba_pc, pba->pba_bus);
192 1.34 drochner sc->sc_intrswiz = pba->pba_intrswiz;
193 1.34 drochner sc->sc_intrtag = pba->pba_intrtag;
194 1.34 drochner sc->sc_flags = pba->pba_flags;
195 1.87 drochner pcirescan(&sc->sc_dev, "pci", wildcard);
196 1.87 drochner }
197 1.87 drochner
198 1.87 drochner int
199 1.93 thorpej pciprint(void *aux, const char *pnp)
200 1.1 mycroft {
201 1.46 augustss struct pci_attach_args *pa = aux;
202 1.10 cgd char devinfo[256];
203 1.37 cgd const struct pci_quirkdata *qd;
204 1.1 mycroft
205 1.10 cgd if (pnp) {
206 1.83 itojun pci_devinfo(pa->pa_id, pa->pa_class, 1, devinfo, sizeof(devinfo));
207 1.75 thorpej aprint_normal("%s at %s", devinfo, pnp);
208 1.10 cgd }
209 1.75 thorpej aprint_normal(" dev %d function %d", pa->pa_device, pa->pa_function);
210 1.45 cgd if (pci_config_dump) {
211 1.45 cgd printf(": ");
212 1.45 cgd pci_conf_print(pa->pa_pc, pa->pa_tag, NULL);
213 1.45 cgd if (!pnp)
214 1.83 itojun pci_devinfo(pa->pa_id, pa->pa_class, 1, devinfo, sizeof(devinfo));
215 1.45 cgd printf("%s at %s", devinfo, pnp ? pnp : "?");
216 1.45 cgd printf(" dev %d function %d (", pa->pa_device, pa->pa_function);
217 1.37 cgd #ifdef __i386__
218 1.45 cgd printf("tag %#lx, intrtag %#lx, intrswiz %#lx, intrpin %#lx",
219 1.45 cgd *(long *)&pa->pa_tag, *(long *)&pa->pa_intrtag,
220 1.45 cgd (long)pa->pa_intrswiz, (long)pa->pa_intrpin);
221 1.37 cgd #else
222 1.54 mrg printf("intrswiz %#lx, intrpin %#lx",
223 1.54 mrg (long)pa->pa_intrswiz, (long)pa->pa_intrpin);
224 1.36 cgd #endif
225 1.45 cgd printf(", i/o %s, mem %s,",
226 1.45 cgd pa->pa_flags & PCI_FLAGS_IO_ENABLED ? "on" : "off",
227 1.45 cgd pa->pa_flags & PCI_FLAGS_MEM_ENABLED ? "on" : "off");
228 1.45 cgd qd = pci_lookup_quirkdata(PCI_VENDOR(pa->pa_id),
229 1.45 cgd PCI_PRODUCT(pa->pa_id));
230 1.45 cgd if (qd == NULL) {
231 1.45 cgd printf(" no quirks");
232 1.45 cgd } else {
233 1.45 cgd bitmask_snprintf(qd->quirks,
234 1.82 itojun "\002\001multifn\002singlefn\003skipfunc0"
235 1.82 itojun "\004skipfunc1\005skipfunc2\006skipfunc3"
236 1.82 itojun "\007skipfunc4\010skipfunc5\011skipfunc6"
237 1.85 kochi "\012skipfunc7",
238 1.82 itojun devinfo, sizeof (devinfo));
239 1.45 cgd printf(" quirks %s", devinfo);
240 1.45 cgd }
241 1.45 cgd printf(")");
242 1.37 cgd }
243 1.6 mycroft return (UNCONF);
244 1.6 mycroft }
245 1.6 mycroft
246 1.6 mycroft int
247 1.87 drochner pcisubmatch(struct device *parent, struct cfdata *cf,
248 1.87 drochner const locdesc_t *ldesc, void *aux)
249 1.6 mycroft {
250 1.6 mycroft
251 1.89 drochner if (cf->cf_loc[PCICF_DEV] != PCICF_DEV_DEFAULT &&
252 1.89 drochner cf->cf_loc[PCICF_DEV] != ldesc->locs[PCICF_DEV])
253 1.59 thorpej return (0);
254 1.89 drochner if (cf->cf_loc[PCICF_FUNCTION] != PCICF_FUNCTION_DEFAULT &&
255 1.89 drochner cf->cf_loc[PCICF_FUNCTION] != ldesc->locs[PCICF_FUNCTION])
256 1.59 thorpej return (0);
257 1.70 thorpej return (config_match(parent, cf, aux));
258 1.40 drochner }
259 1.40 drochner
260 1.40 drochner int
261 1.59 thorpej pci_probe_device(struct pci_softc *sc, pcitag_t tag,
262 1.59 thorpej int (*match)(struct pci_attach_args *), struct pci_attach_args *pap)
263 1.59 thorpej {
264 1.59 thorpej pci_chipset_tag_t pc = sc->sc_pc;
265 1.59 thorpej struct pci_attach_args pa;
266 1.59 thorpej pcireg_t id, csr, class, intr, bhlcr;
267 1.59 thorpej int ret, pin, bus, device, function;
268 1.87 drochner int help[3];
269 1.87 drochner locdesc_t *ldp = (void *)&help; /* XXX XXX */
270 1.87 drochner struct device *subdev;
271 1.59 thorpej
272 1.59 thorpej pci_decompose_tag(pc, tag, &bus, &device, &function);
273 1.59 thorpej
274 1.87 drochner /* a driver already attached? */
275 1.87 drochner if (sc->PCI_SC_DEVICESC(device, function) && !match)
276 1.87 drochner return (0);
277 1.87 drochner
278 1.81 itojun bhlcr = pci_conf_read(pc, tag, PCI_BHLC_REG);
279 1.81 itojun if (PCI_HDRTYPE_TYPE(bhlcr) > 2)
280 1.81 itojun return (0);
281 1.81 itojun
282 1.59 thorpej id = pci_conf_read(pc, tag, PCI_ID_REG);
283 1.59 thorpej csr = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
284 1.59 thorpej class = pci_conf_read(pc, tag, PCI_CLASS_REG);
285 1.59 thorpej
286 1.59 thorpej /* Invalid vendor ID value? */
287 1.59 thorpej if (PCI_VENDOR(id) == PCI_VENDOR_INVALID)
288 1.68 thorpej return (0);
289 1.59 thorpej /* XXX Not invalid, but we've done this ~forever. */
290 1.59 thorpej if (PCI_VENDOR(id) == 0)
291 1.68 thorpej return (0);
292 1.59 thorpej
293 1.59 thorpej pa.pa_iot = sc->sc_iot;
294 1.59 thorpej pa.pa_memt = sc->sc_memt;
295 1.59 thorpej pa.pa_dmat = sc->sc_dmat;
296 1.80 fvdl pa.pa_dmat64 = sc->sc_dmat64;
297 1.59 thorpej pa.pa_pc = pc;
298 1.63 thorpej pa.pa_bus = bus;
299 1.59 thorpej pa.pa_device = device;
300 1.59 thorpej pa.pa_function = function;
301 1.59 thorpej pa.pa_tag = tag;
302 1.59 thorpej pa.pa_id = id;
303 1.59 thorpej pa.pa_class = class;
304 1.59 thorpej
305 1.59 thorpej /*
306 1.59 thorpej * Set up memory, I/O enable, and PCI command flags
307 1.59 thorpej * as appropriate.
308 1.59 thorpej */
309 1.59 thorpej pa.pa_flags = sc->sc_flags;
310 1.59 thorpej if ((csr & PCI_COMMAND_IO_ENABLE) == 0)
311 1.59 thorpej pa.pa_flags &= ~PCI_FLAGS_IO_ENABLED;
312 1.59 thorpej if ((csr & PCI_COMMAND_MEM_ENABLE) == 0)
313 1.59 thorpej pa.pa_flags &= ~PCI_FLAGS_MEM_ENABLED;
314 1.59 thorpej
315 1.59 thorpej /*
316 1.59 thorpej * If the cache line size is not configured, then
317 1.59 thorpej * clear the MRL/MRM/MWI command-ok flags.
318 1.59 thorpej */
319 1.59 thorpej if (PCI_CACHELINE(bhlcr) == 0)
320 1.59 thorpej pa.pa_flags &= ~(PCI_FLAGS_MRL_OKAY|
321 1.59 thorpej PCI_FLAGS_MRM_OKAY|PCI_FLAGS_MWI_OKAY);
322 1.59 thorpej
323 1.64 sommerfe if (sc->sc_bridgetag == NULL) {
324 1.59 thorpej pa.pa_intrswiz = 0;
325 1.59 thorpej pa.pa_intrtag = tag;
326 1.59 thorpej } else {
327 1.59 thorpej pa.pa_intrswiz = sc->sc_intrswiz + device;
328 1.59 thorpej pa.pa_intrtag = sc->sc_intrtag;
329 1.59 thorpej }
330 1.81 itojun
331 1.81 itojun intr = pci_conf_read(pc, tag, PCI_INTERRUPT_REG);
332 1.81 itojun
333 1.59 thorpej pin = PCI_INTERRUPT_PIN(intr);
334 1.65 sommerfe pa.pa_rawintrpin = pin;
335 1.59 thorpej if (pin == PCI_INTERRUPT_PIN_NONE) {
336 1.59 thorpej /* no interrupt */
337 1.59 thorpej pa.pa_intrpin = 0;
338 1.59 thorpej } else {
339 1.59 thorpej /*
340 1.59 thorpej * swizzle it based on the number of busses we're
341 1.59 thorpej * behind and our device number.
342 1.59 thorpej */
343 1.59 thorpej pa.pa_intrpin = /* XXX */
344 1.59 thorpej ((pin + pa.pa_intrswiz - 1) % 4) + 1;
345 1.59 thorpej }
346 1.59 thorpej pa.pa_intrline = PCI_INTERRUPT_LINE(intr);
347 1.59 thorpej
348 1.59 thorpej if (match != NULL) {
349 1.59 thorpej ret = (*match)(&pa);
350 1.59 thorpej if (ret != 0 && pap != NULL)
351 1.59 thorpej *pap = pa;
352 1.59 thorpej } else {
353 1.87 drochner ldp->len = 2;
354 1.87 drochner ldp->locs[PCICF_DEV] = device;
355 1.87 drochner ldp->locs[PCICF_FUNCTION] = function;
356 1.87 drochner
357 1.87 drochner subdev = config_found_sm_loc(&sc->sc_dev, "pci", ldp, &pa,
358 1.87 drochner pciprint, pcisubmatch);
359 1.87 drochner sc->PCI_SC_DEVICESC(device, function) = subdev;
360 1.87 drochner ret = (subdev != NULL);
361 1.59 thorpej }
362 1.59 thorpej
363 1.59 thorpej return (ret);
364 1.59 thorpej }
365 1.59 thorpej
366 1.93 thorpej static void
367 1.87 drochner pcidevdetached(struct device *sc, struct device *dev)
368 1.87 drochner {
369 1.87 drochner struct pci_softc *psc = (struct pci_softc *)sc;
370 1.87 drochner int d, f;
371 1.87 drochner
372 1.87 drochner KASSERT(dev->dv_locators);
373 1.87 drochner d = dev->dv_locators[PCICF_DEV];
374 1.87 drochner f = dev->dv_locators[PCICF_FUNCTION];
375 1.87 drochner
376 1.87 drochner KASSERT(psc->PCI_SC_DEVICESC(d, f) == dev);
377 1.87 drochner
378 1.87 drochner psc->PCI_SC_DEVICESC(d, f) = 0;
379 1.87 drochner }
380 1.87 drochner
381 1.59 thorpej int
382 1.93 thorpej pci_get_capability(pci_chipset_tag_t pc, pcitag_t tag, int capid,
383 1.93 thorpej int *offset, pcireg_t *value)
384 1.40 drochner {
385 1.40 drochner pcireg_t reg;
386 1.40 drochner unsigned int ofs;
387 1.40 drochner
388 1.40 drochner reg = pci_conf_read(pc, tag, PCI_COMMAND_STATUS_REG);
389 1.40 drochner if (!(reg & PCI_STATUS_CAPLIST_SUPPORT))
390 1.40 drochner return (0);
391 1.40 drochner
392 1.48 kleink /* Determine the Capability List Pointer register to start with. */
393 1.47 kleink reg = pci_conf_read(pc, tag, PCI_BHLC_REG);
394 1.47 kleink switch (PCI_HDRTYPE_TYPE(reg)) {
395 1.47 kleink case 0: /* standard device header */
396 1.47 kleink ofs = PCI_CAPLISTPTR_REG;
397 1.47 kleink break;
398 1.47 kleink case 2: /* PCI-CardBus Bridge header */
399 1.47 kleink ofs = PCI_CARDBUS_CAPLISTPTR_REG;
400 1.47 kleink break;
401 1.47 kleink default:
402 1.47 kleink return (0);
403 1.47 kleink }
404 1.47 kleink
405 1.47 kleink ofs = PCI_CAPLIST_PTR(pci_conf_read(pc, tag, ofs));
406 1.40 drochner while (ofs != 0) {
407 1.40 drochner #ifdef DIAGNOSTIC
408 1.40 drochner if ((ofs & 3) || (ofs < 0x40))
409 1.40 drochner panic("pci_get_capability");
410 1.40 drochner #endif
411 1.40 drochner reg = pci_conf_read(pc, tag, ofs);
412 1.40 drochner if (PCI_CAPLIST_CAP(reg) == capid) {
413 1.40 drochner if (offset)
414 1.40 drochner *offset = ofs;
415 1.40 drochner if (value)
416 1.40 drochner *value = reg;
417 1.40 drochner return (1);
418 1.40 drochner }
419 1.40 drochner ofs = PCI_CAPLIST_NEXT(reg);
420 1.40 drochner }
421 1.40 drochner
422 1.40 drochner return (0);
423 1.55 fvdl }
424 1.55 fvdl
425 1.55 fvdl int
426 1.55 fvdl pci_find_device(struct pci_attach_args *pa,
427 1.55 fvdl int (*match)(struct pci_attach_args *))
428 1.55 fvdl {
429 1.59 thorpej extern struct cfdriver pci_cd;
430 1.59 thorpej struct device *pcidev;
431 1.55 fvdl int i;
432 1.87 drochner static const int wildcard[2] = {
433 1.87 drochner PCICF_DEV_DEFAULT,
434 1.87 drochner PCICF_FUNCTION_DEFAULT
435 1.87 drochner };
436 1.55 fvdl
437 1.55 fvdl for (i = 0; i < pci_cd.cd_ndevs; i++) {
438 1.55 fvdl pcidev = pci_cd.cd_devs[i];
439 1.59 thorpej if (pcidev != NULL &&
440 1.87 drochner pci_enumerate_bus((struct pci_softc *)pcidev, wildcard,
441 1.59 thorpej match, pa) != 0)
442 1.59 thorpej return (1);
443 1.59 thorpej }
444 1.59 thorpej return (0);
445 1.59 thorpej }
446 1.59 thorpej
447 1.86 drochner #ifndef PCI_MACHDEP_ENUMERATE_BUS
448 1.59 thorpej /*
449 1.59 thorpej * Generic PCI bus enumeration routine. Used unless machine-dependent
450 1.59 thorpej * code needs to provide something else.
451 1.59 thorpej */
452 1.59 thorpej int
453 1.87 drochner pci_enumerate_bus(struct pci_softc *sc, const int *locators,
454 1.59 thorpej int (*match)(struct pci_attach_args *), struct pci_attach_args *pap)
455 1.59 thorpej {
456 1.59 thorpej pci_chipset_tag_t pc = sc->sc_pc;
457 1.59 thorpej int device, function, nfunctions, ret;
458 1.59 thorpej const struct pci_quirkdata *qd;
459 1.59 thorpej pcireg_t id, bhlcr;
460 1.59 thorpej pcitag_t tag;
461 1.60 thorpej #ifdef __PCI_BUS_DEVORDER
462 1.60 thorpej char devs[32];
463 1.60 thorpej int i;
464 1.60 thorpej #endif
465 1.59 thorpej
466 1.60 thorpej #ifdef __PCI_BUS_DEVORDER
467 1.60 thorpej pci_bus_devorder(sc->sc_pc, sc->sc_bus, devs);
468 1.60 thorpej for (i = 0; (device = devs[i]) < 32 && device >= 0; i++)
469 1.60 thorpej #else
470 1.60 thorpej for (device = 0; device < sc->sc_maxndevs; device++)
471 1.60 thorpej #endif
472 1.60 thorpej {
473 1.87 drochner if ((locators[PCICF_DEV] != PCICF_DEV_DEFAULT) &&
474 1.87 drochner (locators[PCICF_DEV] != device))
475 1.87 drochner continue;
476 1.87 drochner
477 1.59 thorpej tag = pci_make_tag(pc, sc->sc_bus, device, 0);
478 1.81 itojun
479 1.81 itojun bhlcr = pci_conf_read(pc, tag, PCI_BHLC_REG);
480 1.81 itojun if (PCI_HDRTYPE_TYPE(bhlcr) > 2)
481 1.81 itojun continue;
482 1.81 itojun
483 1.59 thorpej id = pci_conf_read(pc, tag, PCI_ID_REG);
484 1.59 thorpej
485 1.59 thorpej /* Invalid vendor ID value? */
486 1.59 thorpej if (PCI_VENDOR(id) == PCI_VENDOR_INVALID)
487 1.59 thorpej continue;
488 1.59 thorpej /* XXX Not invalid, but we've done this ~forever. */
489 1.59 thorpej if (PCI_VENDOR(id) == 0)
490 1.59 thorpej continue;
491 1.59 thorpej
492 1.59 thorpej qd = pci_lookup_quirkdata(PCI_VENDOR(id), PCI_PRODUCT(id));
493 1.59 thorpej
494 1.81 itojun if (qd != NULL &&
495 1.81 itojun (qd->quirks & PCI_QUIRK_MULTIFUNCTION) != 0)
496 1.59 thorpej nfunctions = 8;
497 1.81 itojun else if (qd != NULL &&
498 1.81 itojun (qd->quirks & PCI_QUIRK_MONOFUNCTION) != 0)
499 1.81 itojun nfunctions = 1;
500 1.59 thorpej else
501 1.81 itojun nfunctions = PCI_HDRTYPE_MULTIFN(bhlcr) ? 8 : 1;
502 1.59 thorpej
503 1.59 thorpej for (function = 0; function < nfunctions; function++) {
504 1.87 drochner if ((locators[PCICF_FUNCTION] != PCICF_FUNCTION_DEFAULT)
505 1.87 drochner && (locators[PCICF_FUNCTION] != function))
506 1.87 drochner continue;
507 1.87 drochner
508 1.81 itojun if (qd != NULL &&
509 1.81 itojun (qd->quirks & PCI_QUIRK_SKIP_FUNC(function)) != 0)
510 1.81 itojun continue;
511 1.59 thorpej tag = pci_make_tag(pc, sc->sc_bus, device, function);
512 1.59 thorpej ret = pci_probe_device(sc, tag, match, pap);
513 1.59 thorpej if (match != NULL && ret != 0)
514 1.59 thorpej return (ret);
515 1.59 thorpej }
516 1.55 fvdl }
517 1.59 thorpej return (0);
518 1.66 tshiozak }
519 1.86 drochner #endif /* PCI_MACHDEP_ENUMERATE_BUS */
520 1.66 tshiozak
521 1.66 tshiozak /*
522 1.66 tshiozak * Power Management Capability (Rev 2.2)
523 1.66 tshiozak */
524 1.66 tshiozak
525 1.66 tshiozak int
526 1.84 christos pci_powerstate(pci_chipset_tag_t pc, pcitag_t tag, const int *newstate,
527 1.84 christos int *oldstate)
528 1.66 tshiozak {
529 1.66 tshiozak int offset;
530 1.66 tshiozak pcireg_t value, cap, now;
531 1.66 tshiozak
532 1.66 tshiozak if (!pci_get_capability(pc, tag, PCI_CAP_PWRMGMT, &offset, &value))
533 1.84 christos return EOPNOTSUPP;
534 1.66 tshiozak
535 1.66 tshiozak cap = value >> 16;
536 1.67 itojun value = pci_conf_read(pc, tag, offset + PCI_PMCSR);
537 1.84 christos now = value & PCI_PMCSR_STATE_MASK;
538 1.66 tshiozak value &= ~PCI_PMCSR_STATE_MASK;
539 1.84 christos if (oldstate) {
540 1.84 christos switch (now) {
541 1.84 christos case PCI_PMCSR_STATE_D0:
542 1.84 christos *oldstate = PCI_PWR_D0;
543 1.84 christos break;
544 1.84 christos case PCI_PMCSR_STATE_D1:
545 1.84 christos *oldstate = PCI_PWR_D1;
546 1.84 christos break;
547 1.84 christos case PCI_PMCSR_STATE_D2:
548 1.84 christos *oldstate = PCI_PWR_D2;
549 1.84 christos break;
550 1.84 christos case PCI_PMCSR_STATE_D3:
551 1.84 christos *oldstate = PCI_PWR_D3;
552 1.84 christos break;
553 1.84 christos default:
554 1.84 christos return EINVAL;
555 1.84 christos }
556 1.84 christos }
557 1.84 christos if (newstate == NULL)
558 1.84 christos return 0;
559 1.84 christos switch (*newstate) {
560 1.66 tshiozak case PCI_PWR_D0:
561 1.66 tshiozak if (now == PCI_PMCSR_STATE_D0)
562 1.84 christos return 0;
563 1.66 tshiozak value |= PCI_PMCSR_STATE_D0;
564 1.66 tshiozak break;
565 1.66 tshiozak case PCI_PWR_D1:
566 1.66 tshiozak if (now == PCI_PMCSR_STATE_D1)
567 1.84 christos return 0;
568 1.66 tshiozak if (now == PCI_PMCSR_STATE_D2 || now == PCI_PMCSR_STATE_D3)
569 1.84 christos return EINVAL;
570 1.66 tshiozak if (!(cap & PCI_PMCR_D1SUPP))
571 1.84 christos return EOPNOTSUPP;
572 1.66 tshiozak value |= PCI_PMCSR_STATE_D1;
573 1.66 tshiozak break;
574 1.66 tshiozak case PCI_PWR_D2:
575 1.66 tshiozak if (now == PCI_PMCSR_STATE_D2)
576 1.84 christos return 0;
577 1.66 tshiozak if (now == PCI_PMCSR_STATE_D3)
578 1.84 christos return EINVAL;
579 1.66 tshiozak if (!(cap & PCI_PMCR_D2SUPP))
580 1.84 christos return EOPNOTSUPP;
581 1.66 tshiozak value |= PCI_PMCSR_STATE_D2;
582 1.66 tshiozak break;
583 1.66 tshiozak case PCI_PWR_D3:
584 1.66 tshiozak if (now == PCI_PMCSR_STATE_D3)
585 1.84 christos return 0;
586 1.66 tshiozak value |= PCI_PMCSR_STATE_D3;
587 1.66 tshiozak break;
588 1.66 tshiozak default:
589 1.84 christos return EINVAL;
590 1.66 tshiozak }
591 1.67 itojun pci_conf_write(pc, tag, offset + PCI_PMCSR, value);
592 1.66 tshiozak DELAY(1000);
593 1.66 tshiozak
594 1.84 christos return 0;
595 1.77 thorpej }
596 1.77 thorpej
597 1.77 thorpej /*
598 1.77 thorpej * Vital Product Data (PCI 2.2)
599 1.77 thorpej */
600 1.77 thorpej
601 1.77 thorpej int
602 1.77 thorpej pci_vpd_read(pci_chipset_tag_t pc, pcitag_t tag, int offset, int count,
603 1.77 thorpej pcireg_t *data)
604 1.77 thorpej {
605 1.77 thorpej uint32_t reg;
606 1.77 thorpej int ofs, i, j;
607 1.77 thorpej
608 1.77 thorpej KASSERT(data != NULL);
609 1.77 thorpej KASSERT((offset + count) < 0x7fff);
610 1.77 thorpej
611 1.77 thorpej if (pci_get_capability(pc, tag, PCI_CAP_VPD, &ofs, ®) == 0)
612 1.77 thorpej return (1);
613 1.77 thorpej
614 1.77 thorpej for (i = 0; i < count; offset += sizeof(*data), i++) {
615 1.77 thorpej reg &= 0x0000ffff;
616 1.77 thorpej reg &= ~PCI_VPD_OPFLAG;
617 1.77 thorpej reg |= PCI_VPD_ADDRESS(offset);
618 1.77 thorpej pci_conf_write(pc, tag, ofs, reg);
619 1.77 thorpej
620 1.77 thorpej /*
621 1.77 thorpej * PCI 2.2 does not specify how long we should poll
622 1.77 thorpej * for completion nor whether the operation can fail.
623 1.77 thorpej */
624 1.77 thorpej j = 0;
625 1.77 thorpej do {
626 1.77 thorpej if (j++ == 20)
627 1.77 thorpej return (1);
628 1.77 thorpej delay(4);
629 1.77 thorpej reg = pci_conf_read(pc, tag, ofs);
630 1.77 thorpej } while ((reg & PCI_VPD_OPFLAG) == 0);
631 1.77 thorpej data[i] = pci_conf_read(pc, tag, PCI_VPD_DATAREG(ofs));
632 1.77 thorpej }
633 1.77 thorpej
634 1.77 thorpej return (0);
635 1.77 thorpej }
636 1.77 thorpej
637 1.77 thorpej int
638 1.77 thorpej pci_vpd_write(pci_chipset_tag_t pc, pcitag_t tag, int offset, int count,
639 1.77 thorpej pcireg_t *data)
640 1.77 thorpej {
641 1.77 thorpej pcireg_t reg;
642 1.77 thorpej int ofs, i, j;
643 1.77 thorpej
644 1.77 thorpej KASSERT(data != NULL);
645 1.77 thorpej KASSERT((offset + count) < 0x7fff);
646 1.77 thorpej
647 1.77 thorpej if (pci_get_capability(pc, tag, PCI_CAP_VPD, &ofs, ®) == 0)
648 1.77 thorpej return (1);
649 1.77 thorpej
650 1.77 thorpej for (i = 0; i < count; offset += sizeof(*data), i++) {
651 1.77 thorpej pci_conf_write(pc, tag, PCI_VPD_DATAREG(ofs), data[i]);
652 1.77 thorpej
653 1.77 thorpej reg &= 0x0000ffff;
654 1.79 thorpej reg |= PCI_VPD_OPFLAG;
655 1.77 thorpej reg |= PCI_VPD_ADDRESS(offset);
656 1.77 thorpej pci_conf_write(pc, tag, ofs, reg);
657 1.77 thorpej
658 1.77 thorpej /*
659 1.77 thorpej * PCI 2.2 does not specify how long we should poll
660 1.77 thorpej * for completion nor whether the operation can fail.
661 1.77 thorpej */
662 1.77 thorpej j = 0;
663 1.77 thorpej do {
664 1.77 thorpej if (j++ == 20)
665 1.77 thorpej return (1);
666 1.77 thorpej delay(1);
667 1.77 thorpej reg = pci_conf_read(pc, tag, ofs);
668 1.79 thorpej } while (reg & PCI_VPD_OPFLAG);
669 1.77 thorpej }
670 1.77 thorpej
671 1.77 thorpej return (0);
672 1.80 fvdl }
673 1.80 fvdl
674 1.80 fvdl int
675 1.80 fvdl pci_dma64_available(struct pci_attach_args *pa)
676 1.92 perry {
677 1.80 fvdl #ifdef _PCI_HAVE_DMA64
678 1.80 fvdl if (BUS_DMA_TAG_VALID(pa->pa_dmat64) &&
679 1.80 fvdl ((uint64_t)physmem << PAGE_SHIFT) > 0xffffffffULL)
680 1.80 fvdl return 1;
681 1.80 fvdl #endif
682 1.80 fvdl return 0;
683 1.1 mycroft }
684 1.90 jmcneill
685 1.90 jmcneill void
686 1.90 jmcneill pci_conf_capture(pci_chipset_tag_t pc, pcitag_t tag,
687 1.90 jmcneill struct pci_conf_state *pcs)
688 1.90 jmcneill {
689 1.90 jmcneill int off;
690 1.90 jmcneill
691 1.90 jmcneill for (off = 0; off < 16; off++)
692 1.90 jmcneill pcs->reg[off] = pci_conf_read(pc, tag, (off * 4));
693 1.90 jmcneill
694 1.90 jmcneill return;
695 1.90 jmcneill }
696 1.90 jmcneill
697 1.90 jmcneill void
698 1.90 jmcneill pci_conf_restore(pci_chipset_tag_t pc, pcitag_t tag,
699 1.90 jmcneill struct pci_conf_state *pcs)
700 1.90 jmcneill {
701 1.90 jmcneill int off;
702 1.90 jmcneill
703 1.90 jmcneill for (off = 0; off < 16; off++)
704 1.90 jmcneill pci_conf_write(pc, tag, (off * 4), pcs->reg[off]);
705 1.90 jmcneill
706 1.90 jmcneill return;
707 1.90 jmcneill }
708 1.93 thorpej
709 1.93 thorpej CFATTACH_DECL2(pci, sizeof(struct pci_softc),
710 1.93 thorpej pcimatch, pciattach, NULL, NULL, pcirescan, pcidevdetached);
711