ebus_mainbus.c revision 1.7 
1/*	$NetBSD: ebus_mainbus.c,v 1.7 2011/08/12 06:38:18 mrg Exp $	*/
2/*	$OpenBSD: ebus_mainbus.c,v 1.7 2010/11/11 17:58:23 miod Exp $	*/
3
4/*
5 * Copyright (c) 2007 Mark Kettenis
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19
20#ifdef DEBUG
21#define	EDB_PROM	0x01
22#define EDB_CHILD	0x02
23#define	EDB_INTRMAP	0x04
24#define EDB_BUSMAP	0x08
25#define EDB_BUSDMA	0x10
26#define EDB_INTR	0x20
27extern int ebus_debug;
28#define DPRINTF(l, s)   do { if (ebus_debug & l) printf s; } while (0)
29#else
30#define DPRINTF(l, s)
31#endif
32
33#include <sys/param.h>
34#include <sys/conf.h>
35#include <sys/device.h>
36#include <sys/errno.h>
37#include <sys/extent.h>
38#include <sys/malloc.h>
39#include <sys/systm.h>
40#include <sys/time.h>
41
42#define _SPARC_BUS_DMA_PRIVATE
43#include <sys/bus.h>
44#include <machine/autoconf.h>
45#include <machine/openfirm.h>
46
47#include <dev/pci/pcivar.h>
48
49#include <sparc64/dev/iommureg.h>
50#include <sparc64/dev/iommuvar.h>
51#include <sparc64/dev/pyrovar.h>
52#include <dev/ebus/ebusreg.h>
53#include <dev/ebus/ebusvar.h>
54#include <sparc64/dev/ebusvar.h>
55
56int	ebus_mainbus_match(device_t, cfdata_t, void *);
57void	ebus_mainbus_attach(device_t, device_t, void *);
58
59CFATTACH_DECL_NEW(ebus_mainbus, sizeof(struct ebus_softc),
60    ebus_mainbus_match, ebus_mainbus_attach, NULL, NULL);
61
62static int ebus_mainbus_bus_map(bus_space_tag_t, bus_addr_t, bus_size_t, int,
63	vaddr_t, bus_space_handle_t *);
64static void *ebus_mainbus_intr_establish(bus_space_tag_t, int, int,
65	int (*)(void *), void *, void (*)(void));
66static bus_space_tag_t ebus_mainbus_alloc_bus_tag(struct ebus_softc *,
67	bus_space_tag_t, int);
68#ifdef SUN4V
69static void ebus_mainbus_intr_ack(struct intrhand *);
70#endif
71
72int
73ebus_mainbus_match(struct device *parent, cfdata_t cf, void *aux)
74{
75	struct mainbus_attach_args *ma = aux;
76
77	if (strcmp(ma->ma_name, "ebus") == 0)
78		return (1);
79	return (0);
80}
81
82void
83ebus_mainbus_attach(struct device *parent, struct device *self, void *aux)
84{
85	struct ebus_softc *sc = device_private(self);
86	struct mainbus_attach_args *ma = aux;
87	struct ebus_attach_args eba;
88	struct ebus_interrupt_map_mask *immp;
89	int node, nmapmask, error;
90	struct pyro_softc *psc;
91	int i;
92
93	sc->sc_dev = self;
94	sc->sc_node = node = ma->ma_node;
95	sc->sc_ign = INTIGN((ma->ma_upaid) << INTMAP_IGN_SHIFT);
96
97	if (CPU_ISSUN4U) {
98		printf(": ign %x", sc->sc_ign);
99		/* XXX */
100		extern struct cfdriver pyro_cd;
101
102		for (i = 0; i < pyro_cd.cd_ndevs; i++) {
103			device_t dt = pyro_cd.cd_devs[i];
104			psc = device_private(dt);
105			if (psc && psc->sc_ign == sc->sc_ign) {
106				sc->sc_bust = psc->sc_bustag;
107				sc->sc_csr = psc->sc_csr;
108				sc->sc_csrh = psc->sc_csrh;
109				break;
110			}
111		}
112
113		if (sc->sc_csr == 0) {
114			printf(": can't find matching host bridge leaf\n");
115			return;
116		}
117	}
118
119	printf("\n");
120
121	sc->sc_memtag = ebus_mainbus_alloc_bus_tag(sc, ma->ma_bustag,
122						   PCI_MEMORY_BUS_SPACE);
123	sc->sc_iotag = ebus_mainbus_alloc_bus_tag(sc, ma->ma_bustag,
124						  PCI_IO_BUS_SPACE);
125	sc->sc_childbustag = sc->sc_memtag;
126	sc->sc_dmatag = ma->ma_dmatag;
127
128	/*
129	 * fill in our softc with information from the prom
130	 */
131	sc->sc_intmap = NULL;
132	sc->sc_range = NULL;
133	error = prom_getprop(node, "interrupt-map",
134			sizeof(struct ebus_interrupt_map),
135			&sc->sc_nintmap, (void **)&sc->sc_intmap);
136	switch (error) {
137	case 0:
138		immp = &sc->sc_intmapmask;
139		nmapmask = 1;
140		error = prom_getprop(node, "interrupt-map-mask",
141			    sizeof(struct ebus_interrupt_map_mask), &nmapmask,
142			    (void **)&immp);
143		if (error)
144			panic("could not get ebus interrupt-map-mask: error %d",
145			      error);
146		if (nmapmask != 1)
147			panic("ebus interrupt-map-mask is broken");
148		break;
149	case ENOENT:
150		break;
151	default:
152		panic("ebus interrupt-map: error %d", error);
153		break;
154	}
155
156	error = prom_getprop(node, "ranges", sizeof(struct ebus_mainbus_ranges),
157	    &sc->sc_nrange, (void **)&sc->sc_range);
158	if (error)
159		panic("ebus ranges: error %d", error);
160
161	/*
162	 * now attach all our children
163	 */
164	DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node));
165	for (node = firstchild(node); node; node = nextsibling(node)) {
166		if (ebus_setup_attach_args(sc, node, &eba) != 0) {
167			DPRINTF(EDB_CHILD,
168			    ("ebus_mainbus_attach: %s: incomplete\n",
169			    prom_getpropstring(node, "name")));
170			continue;
171		} else {
172			DPRINTF(EDB_CHILD, ("- found child `%s', attaching\n",
173			    eba.ea_name));
174			(void)config_found(self, &eba, ebus_print);
175		}
176		ebus_destroy_attach_args(&eba);
177	}
178}
179
180static bus_space_tag_t
181ebus_mainbus_alloc_bus_tag(struct ebus_softc *sc,
182			   bus_space_tag_t parent,
183			   int type)
184{
185	struct sparc_bus_space_tag *bt;
186
187	bt = malloc(sizeof(*bt), M_DEVBUF, M_NOWAIT | M_ZERO);
188	if (bt == NULL)
189		panic("could not allocate ebus bus tag");
190
191	bt->cookie = sc;
192	bt->parent = parent;
193	bt->type = type;
194	bt->sparc_bus_map = ebus_mainbus_bus_map;
195	bt->sparc_bus_mmap = ebus_bus_mmap;
196	bt->sparc_intr_establish = ebus_mainbus_intr_establish;
197
198	return (bt);
199}
200
201int
202ebus_mainbus_bus_map(bus_space_tag_t t, bus_addr_t offset, bus_size_t size,
203	int flags, vaddr_t va, bus_space_handle_t *hp)
204{
205	struct ebus_softc *sc = t->cookie;
206	struct ebus_mainbus_ranges *range;
207	bus_addr_t hi, lo;
208	int i, ss;
209
210	DPRINTF(EDB_BUSMAP,
211	    ("\n_ebus_mainbus_bus_map: off %016llx sz %x flags %d",
212	    (unsigned long long)offset, (int)size, (int)flags));
213
214	if (t->parent == 0 || t->parent->sparc_bus_map == 0) {
215		printf("\n_ebus_mainbus_bus_map: invalid parent");
216		return (EINVAL);
217	}
218
219	t = t->parent;
220
221	hi = offset >> 32UL;
222	lo = offset & 0xffffffff;
223	range = (struct ebus_mainbus_ranges *)sc->sc_range;
224
225	DPRINTF(EDB_BUSMAP, (" (hi %08x lo %08x)", (u_int)hi, (u_int)lo));
226	for (i = 0; i < sc->sc_nrange; i++) {
227		bus_addr_t addr;
228
229		if (hi != range[i].child_hi)
230			continue;
231		if (lo < range[i].child_lo ||
232		    (lo + size) > (range[i].child_lo + range[i].size))
233			continue;
234
235#if 0
236		/* Isolate address space and find the right tag */
237		ss = (range[i].phys_hi>>24)&3;
238		switch (ss) {
239		case 1:	/* I/O space */
240			t = sc->sc_iotag;
241			break;
242		case 2:	/* Memory space */
243			t = sc->sc_memtag;
244			break;
245		case 0:	/* Config space */
246		case 3:	/* 64-bit Memory space */
247		default: /* WTF? */
248			/* We don't handle these */
249			panic("ebus_mainbus_bus_map: illegal space %x", ss);
250			break;
251		}
252#else
253ss = 0;
254#endif
255
256		addr = ((bus_addr_t)range[i].phys_hi << 32UL) |
257				    range[i].phys_lo;
258		addr += lo;
259		DPRINTF(EDB_BUSMAP,
260		    ("\n_ebus_mainbus_bus_map: paddr offset %qx addr %qx\n",
261		    (unsigned long long)offset, (unsigned long long)addr));
262		return (bus_space_map(t, addr, size, flags, hp));
263	}
264	DPRINTF(EDB_BUSMAP, (": FAILED\n"));
265	return (EINVAL);
266}
267
268static void *
269ebus_mainbus_intr_establish(bus_space_tag_t t, int ihandle, int level,
270	int (*handler)(void *), void *arg, void (*fastvec)(void) /* ignored */)
271{
272	struct ebus_softc *sc = t->cookie;
273	struct intrhand *ih = NULL;
274	volatile u_int64_t *intrmapptr = NULL, *intrclrptr = NULL;
275	u_int64_t *imap, *iclr;
276	int ino;
277
278#ifdef SUN4V
279	if (CPU_ISSUN4V) {
280		struct upa_reg reg;
281		u_int64_t devhandle, devino = INTINO(ihandle);
282		u_int64_t sysino;
283		int node = -1;
284		int i, err;
285
286		for (i = 0; i < sc->sc_nintmap; i++) {
287			if (sc->sc_intmap[i].cintr == ihandle) {
288				node = sc->sc_intmap[i].cnode;
289				break;
290			}
291		}
292		if (node == -1)
293			return (NULL);
294
295		if (OF_getprop(node, "reg", &reg, sizeof(reg)) != sizeof(reg))
296			return (NULL);
297		devhandle = (reg.ur_paddr >> 32) & 0x0fffffff;
298
299		err = hv_intr_devino_to_sysino(devhandle, devino, &sysino);
300		if (err != H_EOK)
301			return (NULL);
302
303		KASSERT(sysino == INTVEC(sysino));
304		ih = bus_intr_allocate(t0, handler, arg, sysino, level,
305		    NULL, NULL, what);
306		if (ih == NULL)
307			return (NULL);
308
309		intr_establish(ih->ih_pil, ih);
310		ih->ih_ack = ebus_mainbus_intr_ack;
311
312		err = hv_intr_settarget(sysino, cpus->ci_upaid);
313		if (err != H_EOK)
314			return (NULL);
315
316		/* Clear pending interrupts. */
317		err = hv_intr_setstate(sysino, INTR_IDLE);
318		if (err != H_EOK)
319			return (NULL);
320
321		err = hv_intr_setenabled(sysino, INTR_ENABLED);
322		if (err != H_EOK)
323			return (NULL);
324
325		return (ih);
326	}
327#endif
328
329	ihandle |= sc->sc_ign;
330	ino = INTINO(ihandle);
331
332	/* XXX */
333	imap = (uint64_t *)((uintptr_t)bus_space_vaddr(sc->sc_bustag, sc->sc_csrh) + 0x1000);
334	iclr = (uint64_t *)((uintptr_t)bus_space_vaddr(sc->sc_bustag, sc->sc_csrh) + 0x1400);
335	intrmapptr = &imap[ino];
336	intrclrptr = &iclr[ino];
337	ino |= INTVEC(ihandle);
338
339	ih = malloc(sizeof *ih, M_DEVBUF, M_NOWAIT);
340	if (ih == NULL)
341		return (NULL);
342
343	/* Register the map and clear intr registers */
344	ih->ih_map = intrmapptr;
345	ih->ih_clr = intrclrptr;
346
347	ih->ih_fun = handler;
348	ih->ih_arg = arg;
349	ih->ih_pil = level;
350	ih->ih_number = ino;
351	ih->ih_pending = 0;
352
353	intr_establish(ih->ih_pil, level != IPL_VM, ih);
354
355	if (intrmapptr != NULL) {
356		u_int64_t imapval;
357
358		imapval = *intrmapptr;
359		imapval |= (1LL << 6);
360		imapval |= INTMAP_V;
361		*intrmapptr = imapval;
362		imapval = *intrmapptr;
363		ih->ih_number |= imapval & INTMAP_INR;
364	}
365
366	return (ih);
367}
368
369#ifdef SUN4V
370
371static void
372ebus_mainbus_intr_ack(struct intrhand *ih)
373{
374	hv_intr_setstate(ih->ih_number, INTR_IDLE);
375}
376
377#endif
378