1 /* $NetBSD: agp_apple.c,v 1.9 2026/06/21 17:09:44 andvar Exp $ */ 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: agp_apple.c,v 1.9 2026/06/21 17:09:44 andvar Exp $"); 31 #include <sys/param.h> 32 #include <sys/agpio.h> 33 #include <sys/bus.h> 34 #include <sys/conf.h> 35 #include <sys/device.h> 36 #include <sys/malloc.h> 37 #include <sys/kernel.h> 38 #include <sys/proc.h> 39 #include <sys/systm.h> 40 41 #include <dev/pci/agpreg.h> 42 #include <dev/pci/agpvar.h> 43 #include <dev/pci/pcireg.h> 44 #include <dev/pci/pcivar.h> 45 46 #define APPLE_UNINORTH_GART_BASE 0x8c 47 #define APPLE_UNINORTH_GART_BASE_ADDR 0x90 48 #define APPLE_UNINORTH_GART_CTRL 0x94 49 #define APPLE_UNINORTH_GART_INVAL 0x00000001 50 #define APPLE_UNINORTH_GART_ENABLE 0x00000100 51 #define APPLE_UNINORTH_GART_2XRESET 0x00010000 52 #define APPLE_UNINORTH_GART_PERFRD 0x00080000 53 54 static u_int32_t agp_apple_get_aperture(struct agp_softc *); 55 static int agp_apple_set_aperture(struct agp_softc *, u_int32_t); 56 static int agp_apple_bind_page(struct agp_softc *, off_t, bus_addr_t); 57 static int agp_apple_unbind_page(struct agp_softc *, off_t); 58 static void agp_apple_flush_tlb(struct agp_softc *); 59 60 static struct agp_methods agp_apple_methods = { 61 agp_apple_get_aperture, 62 agp_apple_set_aperture, 63 agp_apple_bind_page, 64 agp_apple_unbind_page, 65 agp_apple_flush_tlb, 66 agp_generic_enable, 67 agp_generic_alloc_memory, 68 agp_generic_free_memory, 69 agp_generic_bind_memory, 70 agp_generic_unbind_memory, 71 }; 72 73 struct agp_apple_softc { 74 u_int32_t initial_aperture; /* aperture size at startup */ 75 struct agp_gatt *gatt; 76 }; 77 78 int 79 agp_apple_attach(device_t parent, device_t self, void *aux) 80 { 81 struct pci_attach_args *pa = aux; 82 struct agp_softc *sc = device_private(self); 83 struct agp_apple_softc *asc; 84 struct agp_gatt *gatt; 85 86 asc = malloc(sizeof *asc, M_AGP, M_WAITOK|M_ZERO); 87 sc->as_chipc = asc; 88 sc->as_methods = &agp_apple_methods; 89 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 90 NULL); 91 92 sc->as_apaddr = 0; 93 sc->as_apsize = 8 * 1024 * 1024; 94 sc->as_apflags = 0; 95 sc->as_pc = pa->pa_pc; 96 sc->as_tag = pa->pa_tag; 97 sc->as_apt = pa->pa_memt; 98 99 asc->initial_aperture = sc->as_apsize; 100 101 for (;;) { 102 gatt = agp_alloc_gatt(sc); 103 if (gatt) 104 break; 105 sc->as_apsize = sc->as_apsize >> 1; 106 if (sc->as_apsize == 0) { 107 aprint_error(": can't set aperture size\n"); 108 return ENOMEM; 109 } 110 } 111 asc->gatt = gatt; 112 113 /* Install the gatt. */ 114 aprint_error("gatt: %08jx %ju MB\n", (uintmax_t)gatt->ag_physical, 115 (uintmax_t)(sc->as_apsize >> 20)); 116 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_BASE, 117 (gatt->ag_physical & 0xfffff000) | 118 (sc->as_apsize >> 22)); 119 120 /* Enable the aperture. */ 121 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL, 122 APPLE_UNINORTH_GART_ENABLE); 123 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL, 124 APPLE_UNINORTH_GART_ENABLE | APPLE_UNINORTH_GART_INVAL); 125 pci_conf_write(pa->pa_pc, pa->pa_tag, APPLE_UNINORTH_GART_CTRL, 126 APPLE_UNINORTH_GART_ENABLE); 127 return 0; 128 } 129 130 static u_int32_t 131 agp_apple_get_aperture(struct agp_softc *sc) 132 { 133 #if 0 134 u_int32_t apsize = 0; 135 136 aprint_error("%s: ", __func__); 137 apsize = pci_conf_read(sc->as_pc, sc->as_tag, 138 APPLE_UNINORTH_GART_BASE) & 0x0000ffff; 139 aprint_error("%08x\n", apsize); 140 return (apsize << 22); 141 #else 142 return sc->as_apsize; 143 #endif 144 } 145 146 static int 147 agp_apple_set_aperture(struct agp_softc *sc, u_int32_t aperture) 148 { 149 pcireg_t reg; 150 151 aprint_error("%s: %08x\n", __func__, aperture); 152 reg = pci_conf_read(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_BASE) 153 & 0xfffff000; 154 reg |= ((aperture >> 22) & 0xfff); 155 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_BASE, reg); 156 sc->as_apsize = aperture; 157 return 0; 158 } 159 160 static int 161 agp_apple_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 162 { 163 struct agp_apple_softc *asc = sc->as_chipc; 164 165 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 166 return EINVAL; 167 168 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = htole32(physical); 169 return 0; 170 } 171 172 static int 173 agp_apple_unbind_page(struct agp_softc *sc, off_t offset) 174 { 175 struct agp_apple_softc *asc = sc->as_chipc; 176 177 if (offset < 0 || offset >= (asc->gatt->ag_entries << AGP_PAGE_SHIFT)) 178 return EINVAL; 179 180 asc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 181 return 0; 182 } 183 184 static void 185 agp_apple_flush_tlb(struct agp_softc *sc) 186 { 187 188 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL, 189 APPLE_UNINORTH_GART_ENABLE); 190 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL, 191 APPLE_UNINORTH_GART_ENABLE | APPLE_UNINORTH_GART_INVAL); 192 pci_conf_write(sc->as_pc, sc->as_tag, APPLE_UNINORTH_GART_CTRL, 193 APPLE_UNINORTH_GART_ENABLE); 194 } 195
Indexes created Sun Oct 25 00:26:45 UTC 2026