1/*	$NetBSD$ */
2
3/*-
4 * Copyright (c) 2007 Michael Lorenz
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__KERNEL_RCSID(0, "$NetBSD$");
31#include <sys/param.h>
32#include <sys/systm.h>
33#include <sys/malloc.h>
34#include <sys/kernel.h>
35#include <sys/proc.h>
36#include <sys/conf.h>
37#include <sys/device.h>
38#include <sys/agpio.h>
39
40#include <dev/pci/pcivar.h>
41#include <dev/pci/pcireg.h>
42#include <dev/pci/agpvar.h>
43#include <dev/pci/agpreg.h>
44
45#include <sys/bus.h>
46
47static u_int32_t agp_apple_get_aperture(struct agp_softc *);
48static int agp_apple_set_aperture(struct agp_softc *, u_int32_t);
49static int agp_apple_bind_page(struct agp_softc *, off_t, bus_addr_t);
50static int agp_apple_unbind_page(struct agp_softc *, off_t);
51static void agp_apple_flush_tlb(struct agp_softc *);
52
53static struct agp_methods agp_apple_methods = {
54	agp_apple_get_aperture,
55	agp_apple_set_aperture,
56	agp_apple_bind_page,
57	agp_apple_unbind_page,
58	agp_apple_flush_tlb,
59	agp_generic_enable,
60	agp_generic_alloc_memory,
61	agp_generic_free_memory,
62	agp_generic_bind_memory,
63	agp_generic_unbind_memory,
64};
65
66struct agp_apple_softc {
67	u_int32_t	initial_aperture; /* aperture size at startup */
68	struct agp_gatt *gatt;
69};
70
71int
72agp_apple_attach(device_t parent, device_t self, void *aux)
73{
74	struct pci_attach_args *pa = aux;
75	struct agp_softc *sc = device_private(self);
76	struct agp_apple_softc *asc;
77	struct agp_gatt *gatt;
78
79	asc = malloc(sizeof *asc, M_AGP, M_NOWAIT|M_ZERO);
80	if (asc == NULL) {
81		aprint_error(": can't allocate chipset-specific softc\n");
82		return ENOMEM;
83	}
84	sc->as_chipc = asc;
85	sc->as_methods = &agp_apple_methods;
86	pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff,
87	    NULL);
88
89	sc->as_apaddr = 0;
90	sc->as_apsize = 8 * 1024 * 1024;
91	sc->as_apflags = 0;
92	sc->as_pc = pa->pa_pc;
93	sc->as_tag = pa->pa_tag;
94	sc->as_apt = pa->pa_memt;
95
96	asc->initial_aperture = sc->as_apsize;
97
98	for (;;) {
99		gatt = agp_alloc_gatt(sc);
100		if (gatt)
101			break;
102		sc->as_apsize = sc->as_apsize >> 1;
103		if (sc->as_apsize == 0) {
104			aprint_error(": can't set aperture size\n");
105			return ENOMEM;
106		}
107	}
108	asc->gatt = gatt;
109
110	/* Install the gatt. */
111	aprint_error("gatt: %08x %d MB\n", gatt->ag_physical, sc->as_apsize >> 20);
112	pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_BASE,
113	    (gatt->ag_physical & 0xfffff000) |
114	    (sc->as_apsize >> 22));
115
116	/* Enable the aperture. */
117	pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL,
118	    APPLE_GART_EN);
119	pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL,
120	    APPLE_GART_EN | APPLE_GART_INV);
121	pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL,
122	    APPLE_GART_EN);
123	return 0;
124}
125
126static u_int32_t
127agp_apple_get_aperture(struct agp_softc *sc)
128{
129#if 0
130	u_int32_t apsize = 0;
131
132	aprint_error("%s: ", __func__);
133	apsize = pci_conf_read(sc->as_pc, sc->as_tag,
134	    APPLE_UNINORTH_GART_BASE) & 0x0000ffff;
135	aprint_error("%08x\n", apsize);
136	return (apsize << 22);
137#else
138	return sc->as_apsize;
139#endif
140}
141
142static int
143agp_apple_set_aperture(struct agp_softc *sc, u_int32_t aperture)
144{
145	pcireg_t reg;
146
147	aprint_error("%s: %08x\n", __func__, aperture);
148	reg = pci_conf_read(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_BASE)
149	    & 0xfffff000;
150	reg |= ((aperture >> 22) & 0xfff);
151	pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_BASE, reg);
152	sc->as_apsize = aperture;
153	return 0;
154}
155
156static int
157agp_apple_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical)
158{
159	struct agp_apple_softc *asc = sc->as_chipc;
160
161	if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
162		return EINVAL;
163
164	asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = htole32(physical);
165	return 0;
166}
167
168static int
169agp_apple_unbind_page(struct agp_softc *sc, off_t offset)
170{
171	struct agp_apple_softc *asc = sc->as_chipc;
172
173	if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT))
174		return EINVAL;
175
176	asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0;
177	return 0;
178}
179
180static void
181agp_apple_flush_tlb(struct agp_softc *sc)
182{
183
184	pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL,
185	    APPLE_GART_EN);
186	pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL,
187	    APPLE_GART_EN | APPLE_GART_INV);
188	pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL,
189	    APPLE_GART_EN);
190}
191