ebus_mainbus.c revision 1.13 
1/*	$NetBSD: ebus_mainbus.c,v 1.13 2014/08/24 19:06:14 palle 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#include <sys/cdefs.h>
21__KERNEL_RCSID(0, "$NetBSD: ebus_mainbus.c,v 1.13 2014/08/24 19:06:14 palle Exp $");
22
23#ifdef DEBUG
24#define	EDB_PROM	0x01
25#define EDB_CHILD	0x02
26#define	EDB_INTRMAP	0x04
27#define EDB_BUSMAP	0x08
28#define EDB_BUSDMA	0x10
29#define EDB_INTR	0x20
30extern int ebus_debug;
31#define DPRINTF(l, s)   do { if (ebus_debug & l) printf s; } while (0)
32#else
33#define DPRINTF(l, s)
34#endif
35
36#include <sys/param.h>
37#include <sys/conf.h>
38#include <sys/device.h>
39#include <sys/errno.h>
40#include <sys/extent.h>
41#include <sys/malloc.h>
42#include <sys/systm.h>
43#include <sys/time.h>
44
45#define _SPARC_BUS_DMA_PRIVATE
46#include <sys/bus.h>
47#include <machine/autoconf.h>
48#include <machine/openfirm.h>
49
50#include <dev/pci/pcivar.h>
51
52#include <sparc64/dev/iommureg.h>
53#include <sparc64/dev/iommuvar.h>
54#include <sparc64/dev/pyrovar.h>
55#include <dev/ebus/ebusreg.h>
56#include <dev/ebus/ebusvar.h>
57#include <sparc64/dev/ebusvar.h>
58
59extern struct cfdriver pyro_cd;
60
61int	ebus_mainbus_match(device_t, cfdata_t, void *);
62void	ebus_mainbus_attach(device_t, device_t, void *);
63
64CFATTACH_DECL_NEW(ebus_mainbus, sizeof(struct ebus_softc),
65    ebus_mainbus_match, ebus_mainbus_attach, NULL, NULL);
66
67static int ebus_mainbus_bus_map(bus_space_tag_t, bus_addr_t, bus_size_t, int,
68	vaddr_t, bus_space_handle_t *);
69static void *ebus_mainbus_intr_establish(bus_space_tag_t, int, int,
70	int (*)(void *), void *, void (*)(void));
71static bus_space_tag_t ebus_mainbus_alloc_bus_tag(struct ebus_softc *,
72	bus_space_tag_t, int);
73#ifdef SUN4V
74#if 0
75XXX
76static void ebus_mainbus_intr_ack(struct intrhand *);
77#endif
78#endif
79int
80ebus_mainbus_match(device_t parent, cfdata_t cf, void *aux)
81{
82	struct mainbus_attach_args *ma = aux;
83
84	if (strcmp(ma->ma_name, "ebus") == 0)
85		return (1);
86	return (0);
87}
88
89void
90ebus_mainbus_attach(device_t parent, device_t self, void *aux)
91{
92	struct ebus_softc *sc = device_private(self);
93	struct mainbus_attach_args *ma = aux;
94	struct ebus_attach_args eba;
95	struct ebus_interrupt_map_mask *immp;
96	int node, nmapmask, error;
97	struct pyro_softc *psc;
98	int i, j;
99
100	sc->sc_dev = self;
101
102	printf("\n");
103
104	sc->sc_memtag = ebus_mainbus_alloc_bus_tag(sc, ma->ma_bustag,
105						   PCI_MEMORY_BUS_SPACE);
106	sc->sc_iotag = ebus_mainbus_alloc_bus_tag(sc, ma->ma_bustag,
107						  PCI_IO_BUS_SPACE);
108	sc->sc_childbustag = sc->sc_memtag;
109	sc->sc_dmatag = ma->ma_dmatag;
110
111	sc->sc_node = node = ma->ma_node;
112
113	/*
114	 * fill in our softc with information from the prom
115	 */
116	sc->sc_intmap = NULL;
117	sc->sc_range = NULL;
118	error = prom_getprop(node, "interrupt-map",
119			sizeof(struct ebus_interrupt_map),
120			&sc->sc_nintmap, (void **)&sc->sc_intmap);
121	switch (error) {
122	case 0:
123		immp = &sc->sc_intmapmask;
124		nmapmask = 1;
125		error = prom_getprop(node, "interrupt-map-mask",
126			    sizeof(struct ebus_interrupt_map_mask), &nmapmask,
127			    (void **)&immp);
128		if (error)
129			panic("could not get ebus interrupt-map-mask: error %d",
130			      error);
131		if (nmapmask != 1)
132			panic("ebus interrupt-map-mask is broken");
133		break;
134	case ENOENT:
135		break;
136	default:
137		panic("ebus interrupt-map: error %d", error);
138		break;
139	}
140
141	/*
142	 * Ebus interrupts may be connected to any of the PCI Express
143	 * leafs.  Here we add the appropriate IGN to the interrupt
144	 * mappings such that we can use it to distingish between
145	 * interrupts connected to PCIE-A and PCIE-B.
146	 */
147	for (i = 0; i < sc->sc_nintmap; i++) {
148		for (j = 0; j < pyro_cd.cd_ndevs; j++) {
149			device_t dt = pyro_cd.cd_devs[j];
150			psc = device_private(dt);
151			if (psc && psc->sc_node == sc->sc_intmap[i].cnode) {
152				sc->sc_intmap[i].cintr |= psc->sc_ign;
153				break;
154			}
155		}
156	}
157
158	error = prom_getprop(node, "ranges", sizeof(struct ebus_mainbus_ranges),
159	    &sc->sc_nrange, (void **)&sc->sc_range);
160	if (error)
161		panic("ebus ranges: error %d", error);
162
163	/*
164	 * now attach all our children
165	 */
166	DPRINTF(EDB_CHILD, ("ebus node %08x, searching children...\n", node));
167	for (node = firstchild(node); node; node = nextsibling(node)) {
168		if (ebus_setup_attach_args(sc, node, &eba) != 0) {
169			DPRINTF(EDB_CHILD,
170			    ("ebus_mainbus_attach: %s: incomplete\n",
171			    prom_getpropstring(node, "name")));
172			continue;
173		} else {
174			DPRINTF(EDB_CHILD, ("- found child `%s', attaching\n",
175			    eba.ea_name));
176			(void)config_found(self, &eba, ebus_print);
177		}
178		ebus_destroy_attach_args(&eba);
179	}
180}
181
182static bus_space_tag_t
183ebus_mainbus_alloc_bus_tag(struct ebus_softc *sc,
184			   bus_space_tag_t parent,
185			   int type)
186{
187	struct sparc_bus_space_tag *bt;
188
189	bt = malloc(sizeof(*bt), M_DEVBUF, M_NOWAIT | M_ZERO);
190	if (bt == NULL)
191		panic("could not allocate ebus bus tag");
192
193	bt->cookie = sc;
194	bt->parent = parent;
195	bt->type = type;
196	bt->sparc_bus_map = ebus_mainbus_bus_map;
197	bt->sparc_bus_mmap = ebus_bus_mmap;
198	bt->sparc_intr_establish = ebus_mainbus_intr_establish;
199
200	return (bt);
201}
202
203int
204ebus_mainbus_bus_map(bus_space_tag_t t, bus_addr_t offset, bus_size_t size,
205	int flags, vaddr_t va, bus_space_handle_t *hp)
206{
207	struct ebus_softc *sc = t->cookie;
208	struct ebus_mainbus_ranges *range;
209	bus_addr_t hi, lo;
210	int i;
211#if 0
212	int ss;
213#endif
214
215	DPRINTF(EDB_BUSMAP,
216	    ("\n_ebus_mainbus_bus_map: off %016llx sz %x flags %d",
217	    (unsigned long long)offset, (int)size, (int)flags));
218
219	if (t->parent == 0 || t->parent->sparc_bus_map == 0) {
220		printf("\n_ebus_mainbus_bus_map: invalid parent");
221		return (EINVAL);
222	}
223
224	t = t->parent;
225
226	hi = offset >> 32UL;
227	lo = offset & 0xffffffff;
228	range = (struct ebus_mainbus_ranges *)sc->sc_range;
229
230	DPRINTF(EDB_BUSMAP, (" (hi %08x lo %08x)", (u_int)hi, (u_int)lo));
231	for (i = 0; i < sc->sc_nrange; i++) {
232		bus_addr_t addr;
233
234		if (hi != range[i].child_hi)
235			continue;
236		if (lo < range[i].child_lo ||
237		    (lo + size) > (range[i].child_lo + range[i].size))
238			continue;
239
240#if 0
241		/* Isolate address space and find the right tag */
242		ss = (range[i].phys_hi>>24)&3;
243		switch (ss) {
244		case 1:	/* I/O space */
245			t = sc->sc_iotag;
246			break;
247		case 2:	/* Memory space */
248			t = sc->sc_memtag;
249			break;
250		case 0:	/* Config space */
251		case 3:	/* 64-bit Memory space */
252		default: /* WTF? */
253			/* We don't handle these */
254			panic("ebus_mainbus_bus_map: illegal space %x", ss);
255			break;
256		}
257#endif
258
259		addr = ((bus_addr_t)range[i].phys_hi << 32UL) |
260				    range[i].phys_lo;
261		addr += lo;
262		DPRINTF(EDB_BUSMAP,
263		    ("\n_ebus_mainbus_bus_map: paddr offset %qx addr %qx\n",
264		    (unsigned long long)offset, (unsigned long long)addr));
265		return (bus_space_map(t, addr, size, flags, hp));
266	}
267	DPRINTF(EDB_BUSMAP, (": FAILED\n"));
268	return (EINVAL);
269}
270
271static void *
272ebus_mainbus_intr_establish(bus_space_tag_t t, int ihandle, int level,
273	int (*handler)(void *), void *arg, void (*fastvec)(void) /* ignored */)
274{
275	struct intrhand *ih = NULL;
276	volatile u_int64_t *intrmapptr = NULL, *intrclrptr = NULL;
277	u_int64_t *imap, *iclr;
278	int ino;
279
280#ifdef SUN4V
281#if 0
282XXX
283	if (CPU_ISSUN4V) {
284		struct upa_reg reg;
285		u_int64_t devhandle, devino = INTINO(ihandle);
286		u_int64_t sysino;
287		int node = -1;
288		int i, err;
289
290		for (i = 0; i < sc->sc_nintmap; i++) {
291			if (sc->sc_intmap[i].cintr == ihandle) {
292				node = sc->sc_intmap[i].cnode;
293				break;
294			}
295		}
296		if (node == -1)
297			return (NULL);
298
299		if (OF_getprop(node, "reg", &reg, sizeof(reg)) != sizeof(reg))
300			return (NULL);
301		devhandle = (reg.ur_paddr >> 32) & 0x0fffffff;
302
303		err = hv_intr_devino_to_sysino(devhandle, devino, &sysino);
304		if (err != H_EOK)
305			return (NULL);
306
307		KASSERT(sysino == INTVEC(sysino));
308		ih = bus_intr_allocate(t0, handler, arg, sysino, level,
309		    NULL, NULL, what);
310		if (ih == NULL)
311			return (NULL);
312
313		intr_establish(ih->ih_pil, ih);
314		ih->ih_ack = ebus_mainbus_intr_ack;
315
316		err = hv_intr_settarget(sysino, cpus->ci_upaid);
317		if (err != H_EOK)
318			return (NULL);
319
320		/* Clear pending interrupts. */
321		err = hv_intr_setstate(sysino, INTR_IDLE);
322		if (err != H_EOK)
323			return (NULL);
324
325		err = hv_intr_setenabled(sysino, INTR_ENABLED);
326		if (err != H_EOK)
327			return (NULL);
328
329		return (ih);
330	}
331#endif
332#endif
333
334	ino = INTINO(ihandle);
335
336	struct pyro_softc *psc = NULL;
337	int i;
338
339	for (i = 0; i < pyro_cd.cd_ndevs; i++) {
340		device_t dt = pyro_cd.cd_devs[i];
341		psc = device_private(dt);
342		if (psc && psc->sc_ign == INTIGN(ihandle)) {
343			break;
344		}
345	}
346	if (psc == NULL)
347		return (NULL);
348
349	imap = (uint64_t *)((uintptr_t)bus_space_vaddr(psc->sc_bustag, psc->sc_csrh) + 0x1000);
350	iclr = (uint64_t *)((uintptr_t)bus_space_vaddr(psc->sc_bustag, psc->sc_csrh) + 0x1400);
351	intrmapptr = &imap[ino];
352	intrclrptr = &iclr[ino];
353	ino |= INTVEC(ihandle);
354
355	ih = malloc(sizeof *ih, M_DEVBUF, M_NOWAIT);
356	if (ih == NULL)
357		return (NULL);
358
359	/* Register the map and clear intr registers */
360	ih->ih_map = intrmapptr;
361	ih->ih_clr = intrclrptr;
362
363	ih->ih_ivec = ihandle;
364	ih->ih_fun = handler;
365	ih->ih_arg = arg;
366	ih->ih_pil = level;
367	ih->ih_number = ino;
368	ih->ih_pending = 0;
369
370	intr_establish(ih->ih_pil, level != IPL_VM, ih);
371
372	if (intrmapptr != NULL) {
373		u_int64_t imapval;
374
375		imapval = *intrmapptr;
376		imapval |= (1LL << 6);
377		imapval |= INTMAP_V;
378		*intrmapptr = imapval;
379		imapval = *intrmapptr;
380		ih->ih_number |= imapval & INTMAP_INR;
381	}
382
383	return (ih);
384}
385
386#ifdef SUN4V
387#if 0
388XXX
389static void
390ebus_mainbus_intr_ack(struct intrhand *ih)
391{
392	hv_intr_setstate(ih->ih_number, INTR_IDLE);
393}
394#endif
395#endif
396